REFERENCE STANDARD RS 11

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Reference Standard 11 161 REFERENCE STANDARD RS 11 FOUNDATIONS * LIST OF REFERENCED NATIONAL STANDARDS ANSI/ASTM-C136 Method for or Sieve Analysis of Fine and Coarse Aggregates……………………...1984a ANSI/ASTM-C117 Test Method for Material Finer than 75-um (No. 200) Sieve in Material Aggregates by
Washing……………………………………………………………...………...…… 1987 ANSI/ASTM-D1557 Test Methods for Moisture - Density Relations of Soils and Soil Aggregate Mixtures
using 10-lb. (4.54-kg) Rammer and an 18 in. Drop…………….………...………....1987 ANSI/ASTM-D3017 Standard Test Method for Moisture Content of Soil and Soil Aggregate in Place by
Nuclear Methods (Shallow Depth)…………………………………......................... 1978 ANSI 05.1 Specifications and Dimensions for Wood Poles……………………………………. 1987 AWPA-C1 Standard for the Preservative Treatment of all Timber Products by Pressure Processes.. 1987 AWPA-C3 Standard for the Preservative Treatment of Piles by Pressure Processes……………1987 AWPA-C4 Standard for the Preservative Treatment of Poles by Pressure Processes…………...1988 AWPA-M2 Standard Instructions for the Inspection of Preservative Treatment of Wood…………….1983 AWPA-M4 Standard for the Care of Pressure-Treated Wood Products………………………… 1984 ASTM-D25 Standard Specification for Round Timber Piles…………………………................. 1988 ASTM-D2899 Establishing Design Stresses for Round Timber Piles………………………………1986 ANSI-ASTM-A252 Standard Specification for Welded and Seamless Steel Pipe Piles………………….1982 * 1342-88 BCR; 289-84 BCR ** REFERENCE STANDARD RS 11-1 ANSI/ASTM-C136 Method for Sieve Analysis of Fine and Coarse Aggregates……………………. .. 1984a ** 1342-88 BCR;289-84 BCR;610-80 BCR ** REFERENCE STANDARD RS 11-2 ANSI/ASTM-C117 Test Method for Material Finer than 75-um (No. 200) Sieve in Material Aggregates
by Washing……………………………………………………………………………....1987 ** 1342-88 BCR;289-84 BCR;610-80 BCR *** REFERENCE STANDARD RS 11-3 ANSI/ASTM-D-1557 Test Methods-Method of Test for the Moisture-Density Relations of Soils and Soil
Aggregate Mixtures using 10 lb. (4.54-kg.) Rammer and an 18 in. Drop………….. 1978 *** 1342-88 BCR;610-80 BCR † REFERENCE STANDARD RS 11-3A ANSI/ASTM-D3017 1978 - Standard Test Method for Moisture Content of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth)…………………………………………………. 1978 †610-80 BCR †† REFERENCE STANDARD RS 11-4 AWPA C4 1988 - Standard for the Preservative Treatment of Poles by Pressure Processes. 512-79 BCR ††1342-88 BCR; 289-84 BCR; 610-80 BCR; †† REFERENCE STANDARD RS 11-5 ANSI 05.1 1987 - Specification and Dimensions for Wood Poles. †† 1342-88 BCR; 289-84 BCR; 610-80 BCR;512-79 BCR †† REFERENCE STANDARD RS 11-6 AWPA-C1-1987 - Standard for the Preservative Treatment of All Timber Products by Pressure Processes. AWPA-C3-1987 - Standard for the Preservative Treatment of Piles by Pressure Processes. AWPA-M2-1983 - Standard Instructions for the Inspection of Preservative Treatment of Wood. AWPA-M4-1984 - Standard for the Case of Pressure Treated Wood Products. ††1342-88 BCR; 289-84 BCR; 610-80 BCR; 512-79 BCR Reference Standard 11 162 †† REFERENCE STANDARD RS 11-7 ANSI/ASTM-D25 Standard Specifications for Round Timber Piles……………………………………1988 ASTM-D2899 Establishing Design Stresses for Round Timber Piles……………………………... 1986 MODIFICATIONS The provisions of ASTM-D25- 1988 are modified so as to add the following note: NOTE: The prior Use Classification distinction of Class A and Class B piles has been eliminated. The Use Classification now reflects the manner in which the load-carrying capacity of timber piles are developed, namely as
Friction Piles or End-Bearing Piles. Class A and Class B piles, as referred to in section 27-707(a)(1), shall be
distinguished from each other only by minimum tip size. ††1342-88 BCR; 289-84 BCR; 610-80 BCR; 512-79 BCR ** REFERENCE STANDARD RS 11-8 ANSI/ASTM-A252 1982 - Standard Specification for Welded and Seamless Steel Pipe Piles. **289-84 BCR; 610-80 BCR Refernce Standard 12 163 REFERENCE STANDARD RS 12 LIGHT, HEAT, VENTILATION AND NOISE CONTROL * LIST OF REFERENCED NATIONAL STANDARDS ASHRAE Handbook HVAC Systems and Application.......................…………………………................. 1987 ANSI/ASTM E90 Standard Method for Laboratory Measurement of Air- borne Sound Transmission Loss of
Building Partitions....... …………………………………………………………….. 1987 ASTM E413 Standard Classification for Determination of Sound Transmission Class..................1987 ANSI/ASTM E336 Standard Test Method for Measurement of Airborne Sound Insulation in Buildings...1984 NCMA-TEK 69.A New Data on Sound Reduction with Concrete Masonry Walls…………………………….. 1978
GA-600 Fire Resistance Design Manual Twelfth Edition, as Modified……………………...1988 ANSI/ASTM E492 Standard Method of Laboratory Measurement of Impact Sound Transmission through Floor-Ceiling Assemblies using the Tapping Machine……………………………………………..…1986 ANSI/ISO 1680 Test Code for the Measurement of Airborne Noise Emitted by Rotating Electrical
Machinery, Part 1 and Part 2...........…………………………..…………………….. 1986 ASHRAE Handbook Fundamentals……………………………………………………………………...... 1985 ANSI S 1.4 Specification for Sound Level Meters and Supplement ANSI A1.4a-1985.......…… 1983 ANSI S 12.34 Engineering Methods for the Determination of Sound Power Levels of Noise Sources for
Free-Field Conditions over a Reflecting Plane……………………………………... 1988 ANSI S 12.30 Guidelines for the Use of Sound Power Standards and for the Preparation of Noise Test
Codes..................................................…….…………………………………………1990 ANSI S 12.31 Precision Method for the Determination of Sound Power Levels of Broadband Noise
Sources in Reverberation Rooms……………………………………………………1990 ANSI S 12.32 Precision Method for the Determination of Sound Power Levels of Discrete Frequency
and Narrow Band Noise Sources in Reverberation Rooms………………………… 1990 ANSI S 1.13 Methods for the Measurement of Sound Pressure Levels (R 1986)……………… 1971 ANSI S 1.6 Preferred Frequencies and Band Numbers for Acoustical Measurements (R 1990).. 1984 ANSI S 1.11 Specification for Octave-Band and Fractional-Octave- Band Analog and Digital Filters ..1986 Opinion 76-16 Proceeding on Motion of the Commissioner as to Insulation Standards, PSC Case No.
26913 August 13, 1976……….…………………………………………………….. 1976 *243-90 BCR; 261-86 BCR; 290-84 BCR ** REFERENCE STANDARD RS 12-1 HEATING
1. HEATING CAPACITY - The heating capacity
required in each room or space shall be calculated in
accordance with the principles set forth in ASHRAE
Handbook-1987 HVAC Systems and Applications.
The calculations of heating capacity shall consider the
areas and transmission coefficients of all surfaces
exposed to outdoor temperatures or to unheated areas,
and shall include allowance for air infiltration and
wind velocity. In spaces with high ceilings, an
allowance shall be made for the effect of stratification
so that the prescribed temperature will be maintained
at a level 5 feet above the floor. **243-90 BCR; 253-82 BCR *** REFERENCE STANDARD RS 12-2 SOUND TRANSMISSION CLASS RATINGS
TEST PROCEDURES FOR STC RATINGS-The STC
rating of a construction assembly shall be obtained
from one of the following methods: (a) Laboratory test: ANSI/ASTM E 90 - 1987 Standard Method for Laboratory
Measurement of Airborne Sound Transmission Loss of
Building Partitions.
ASTM E 413 - 1987 - Standard Classification for Determination
of Sound Transmission Class. (b) Field Test: ANSI/ASTM E 90 - 1987 Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions. ANSI/ASTM E 336 - 1984 Standard Test Method for Measurement of Airborne Sound Insulation in Buildings, applicable portions of this. STC TEST DATA - Certified laboratory test data obtained by acceptable laboratories in accordance with ANSI/ASTM E 90 AND ASTM E 413 may be used in obtaining STC ratings. The following national standards may be accepted for sound transmission class-ratings only: NCMA-TEK 69.A - 1978 New Data on Sound Reduction with Concrete Masonry Walls. GA-600 1988 Fire Resistance Design Manual, Twelfth Edition, as Modified. ***243-90 BCR; 261-86 BCR; 290-84 BCR; 253-82 BCR Refernce Standard 12 164 *** REFERENCE STANDARD RS 12-3 IMPACT NOISE RATINGS TEST METHOD FOR INR - The INR of a floor- ceiling construction assembly shall be obtained from the following: ANSI/ASTM E 492 - 1986 Standard Method of Laboratory Measurement of Impact Sound Transmission through Floor-Ceiling Assemblies using the Tapping Machine. TEST DATA FOR INR RATINGS - Certified laboratory test data obtained by acceptable laboratories in accordance with ANSI/ASTM E 492 may be used for INR RATING. ***243-90 BCR; 261-86 BCR; 253-82 BCR * REFERENCE STANDARD RS 12-4 NOISE CRITERION (NC) LEVELS NC levels shall be as shown in ASHRAE 1989 Handbook-Fundamentals. *243-90 BCR; 253-82 BCR * REFERENCE STANDARD 12-5 TEST PROCEDURES FOR SOUND POWER LEVEL The sound power levels of exterior mechanical equipment and of fan coil units, grills, registers, diffusers and induction units shall be measured in accordance with the following: ASHRAE Handbook1987- HVAC Systems and Applications. ANSI/ISO 1680-1986 Test Code for the Measurement of Airborne Noise Emitted by Rotating Electrical Machinery, Part 1 and Part 2. *243-90 BCR; 253-82 BCR ** REFERENCE STANDARD 12-6 ANSI S 1.4-1983 - Specification for Sound Level Meters and Supplement ANSI S 1.4a-1985. **243-90 BCR; 261-86 BCR; 290-84 BCR * REFERENCE STANDARD 12-7 ANSI S 12.34 - 1988 Engineering Methods for the Determination of Sound Power Levels of Noise Sources for Free-Field Conditions over a Reflecting Plane. ANSI S 12.30 - 1990 Guidelines for the Use of Sound Power Standards and for the Preparation of Noise Test Codes. ANSI S 12:30† - 1990 Precision Method for the Determination of Sound Power Levels of Broadband Noise Sources in Reverberation Rooms. ANSI S 12.32-1990 Precision Method for the Determination of Sound Power Levels of Discrete Frequency and Narrow Bank Noise Sources in Reverberation Rooms. ANSI S 1.13-1971 Methods for the Measure of Sound Pressure Levels. (R 1986). *243-90 BCR; 253-82 BCR
†As enacted; but “12.31” probably intended. *** REFERENCE STANDARD 12-8 ANSI S 1.61-984 Preferred Frequencies and Band Numbers for Acoustical Measurements (R 1990). ***243-90 BCR; 261-86 BCR; 253-82 BCR * REFERENCE STANDARD 12-9 ANSI S1.11-1986-Specification for Octave-Band and Fractional-Octave Band Analog and Digital Filters. *243-90 BCR; 253-82 BCR REFERENCE STANDARD 12-10 OPINION 76-16 PSC 1976 Case No. 26913-Proceeding on Motion o f the Commission as to Insulation Standards,
August 13, 1976. Reference Standard 13 165 REFERENCE STANDARD RS 13 MECHANICAL VENTILATION, AIR CONDITIONING, AND REFRIGERATION SYSTEMS * LIST OF REFERENCED NATIONAL STANDARDS **NFiPA 90A Standard for the Installation of Air Conditioning and Ventilating Systems, As Modified....1996 ANSI/ NFiPA 96 Standard for the Installation of Equipment for the Removal of Smoke and Grease-Laden
Vapors from Commercial Cooking Equipment..................………………................ 1984 ***NFiPA 90B Standard for the Installation of Warm Air Heating and Air Conditioning and Ventilating
Systems, As Modified ……………………………………………………………... 1996 ANSI/ NFiPA 91 Standard for the Installation of Blower and Exhaust Systems for Dust, Stock and Vapor
Removal Conveying.............…….........……………………………………………..1973 ANSI B60.1/ ASHRAE 15 Safety Code for Mechanical Refrigeration....……....................……………………. 1978
ANSI Z263.1/ UL 207 Standard for Refrigerant-Containing Components and Accessories Non-Electrical..1982 ANSI Z262.1/ UL 303 Standard for Refrigeration and Air-Conditioning Condensing and Compressor Units,
Revision March 1982........……..............…………………………………………… 1980 ANSI B136.1/ UL 353 Limit Controls, Revision November 1976..............……...........…………………….1974 ANSI Z226.1/ UL 372 Standard for Primary Safety Controls for Gas and Oil-Fired Appliances. Revisions
September 10, 1976 and September 3, 19……………......................................…… 1975 ANSI B144.1/ UL 465 Standard for Central Cooling Air Conditioners. Revision May 1981..........………...1978 ANSI C33.14/ UL 484 Room Air Conditioners..........…….........................................………………………1982 ANSI B191.1/ UL 559 Standard for Heat Pumps. Revision October 1981……............……. ……………... 1975 ANSI Z251.1/ UL 883 Standard for Fan-Coil Units and Room Fan-Heaters. Revision February 1982…… 1980 ANSI B124.1/ UL 900 Standard for Test Performance of Air Filter Units. Revision December 1980……...1977 ANSI/ NFiPA 17 Standard for Dry Chemical Extinguishing Systems.....…….......…………………... 1980 Note 1: Wherever in these standards reference is made to NFiPA 70, National Electrical Code, the work so covered
shall meet the requirements of the Electrical Code of the City of New York.
Note 2: Wherever in these standards reference is made to the authority having jurisdiction, substitute " to the
Commissioner." * 913-82 BCR
**DOB 5-4-02; Local Law 16-1984
***DOB 5-4-02 *** REFERENCE STANDARD RS 13-1 NFiPA No. 90 A-96, as modified, Standard for the
Installation of Air Conditioning and Ventilation Systems.
Those provisions of ANSI/NFiPA No. 90 A-96 as
herein set forth with the modifications thereto shall
constitute Reference Standard RS 13-1.
The appendices to ANSI/NFiPA No. 90 A-96 are not
part of this Reference Standard. These are for informational
purposes only, and are not reproduced here.
Wherever reference is made to the "National Electrical
Code" it shall be changed to read "Electrical Code of
the City of New York."
The New York State Energy Conservation Construction
Code also regulates the design and construction of
heating, ventilating, and air conditioning systems in
New York City. STANDARD FOR THE INSTALLATION OF AIR CONDITIONING AND VENTILATION SYSTEMS ANSI/NFiPA No. 90 A-1996, AS MODIFIED Indicates where text deviates from ANSI/NFiPA No. 90A – 1996.
Section numbers are from ANSI/NFiPA No. 90A – 1996. CONTENTS Chapter 1 – General 1-1 Introduction 1-2 Scope 1-3 Purpose 1-4 Maintenance 1-5 Definitions Chapter 2 - HVAC Systems 2-1 General Requirements – Equipment 2-1.5 Equipment Location 2-2 System Components 2-2.1 Outside Air Intakes and Exhaust 2-2.2 Air Cleaners and Air Filters 2-2.3 Fans 2-2.3.1 Installation 2-2.3.2 Access 2-2.3.3 Exposed Inlets 2-2.4 Air Cooling and Heating Equipment 2-2.4.1 Installation 2-2.4.2 Appliances 2-2.4.3 Mechanical Cooling Reference Standard 13 166 2-2.4.4 Furnaces 2-2.4.5 Duct Heaters 2-3 Air Distribution 2-3.1 Air Ducts 2-3.2 Air Connectors 2-3.3 Supplementary Materials for Air
Distribution Systems 2-3.4 Air Duct Access and Inspection 2-3.5 Air Duct Integrity 2-3.5.3 Air Duct at Heat Sources 2-3.6 Air Outlets 2-3.6.1 General 2-3.6.2 Construction of Air Outlets 2-3.6.3 Location of Air Outlets 2-3.7 Air Inlets (Return or Exhaust or
Return and Exhaust) 2-3.7.1 General
2-3.7.2 Construction of Air Inlets 2-3.7.3 Location of Air Inlets 2-3.8 Fire Dampers 2-3.9 Smoke Dampers 2-3.10 Plenums 2-3.10.1 Ceiling Cavity Plenum 2-3.10.2 Duct Distribution Plenum 2-3.10.3 Apparatus Casing Plenum 2-3.10.4 Air-Handling Unit Room Plenum 2-3.10.5 Raised Floor Plenum 2-3.11 Corridor Air Systems 2-3.11.1 Egress Corridors 2-3.11.2 Exits 2-3.12 Smoke Control Chapter 3 - Integration of a Ventilation and Air Conditioning System(s) with Building Construction 3-1 Air-Handling Equipment Rooms 3-1.1 General 3-1.2 Air-Handling Equipment Rooms Used
as Plenum Space 3-1.3 Air-Handling Equipment Rooms that
Have Air Ducts that Open Directly
into a Shaft 3-1.4 Other Spaces Housing Air-Handling Units 3-2 Building Construction 3-2.1 Air Duct Clearance 3-2.2 Structural Members 3-3 Penetrations - Protection of Openings 3-3.1 Fire-Rated Walls and Partitions 3-3.2 Floors Required to Have a Fire Resistance
Rating 3-3.3 Floor/Roof -Ceiling Assemblies Having
a Fire Resistance Rating 3-3.4 Shafts 3-3.4.1 Enclosure of Ducts 3-3.5 Location of Smoke Dampers 3-4 Fire Dampers, Smoke Dampers, and
Ceiling Dampers 3-4.5 Damper Closure 3-4.6 Installation 3-4.6.4 Patching, Filling and Repairing Chapter 4 – Controls 4-1 Wiring 4-2 Manual Control 4-3 Smoke Dampers 4-4 Smoke Detection for Automatic Control 4-4.1 Location 4-4.2 Function 4-4.3 Installation CHAPTER 1 - GENERAL 1-1 Introduction. - An air duct system has the potential
to convey smoke, hot gases, and flame from area to area
and to supply air to aid combustion in the fire area. For
these reasons, fire protection of an air duct system is
essential to safety, to life and the protection of property.
However, an air duct system's fire integrity also enables
it to be used as part of a building's fire protection
system. (See Section 1-4)
1-2 Scope. - This standard shall apply to all systems
for the movement of environmental air in structures that
are not otherwise exempted by Section 27-777(b) of the
Administrative Code.
1-3 Purpose.
1-3.1 This standard is intended to prescribe minimum
requirements for safety to life and property from fire.
These requirements are intended to: (a) Restrict the spread of smoke through air duct systems within a building or into a building from the
outside. (b) Restrict the spread of fire through air duct systems from the area of fire origin whether located within the
building or outside. (c) Maintain the fire-resistive integrity of building components and elements such as floors, partitions,
roofs, walls, and floor/roof-ceiling assemblies affected
by the installation of air duct systems. (d) Minimize ignition sources and combustibility of the elements of the air duct systems. (e) Permit the air duct systems in a building to be used for the additional purpose of emergency smoke
control.
1-3.2 Nothing in this standard is intended to prevent
the use of new methods or devices, provided that
sufficient technical data is submitted to the Department
of Buildings to demonstrate that the proposed method
or device is equivalent in quality, strength, durability,
and safety to that prescribed by this standard.
1-3.3 The provisions of this standard are not intended
to be applied retroactively. Where the system is being Reference Standard 13 167 altered, extended, or renovated, the requirements of
Article 4 of Subchapter 1 of Chapter 1 of Title 27 of the
Administrative Code shall govern the applicability of
this standard.
1-4 Maintenance. –The appropriate provisions of the
Building Code shall apply.
1-5 Definitions.
Accepted - Means "Accepted" by the Materials and
Equipment Acceptance Division of the Department of
Buildings.
NOTE: The MEA Division is the "authority having
jurisdiction" in use of materials, assemblies, forms,
methods of construction, and service equipment subject
to the acceptance requirements of Building Code
Sections 27-131 and 27-135.
Air Cleaner - A device used to reduce or remove airborne
solids from heating, ventilating and air conditioning
systems by electrostatic means.
Air Distribution System - A continuous passageway
for the transmission of air that, in addition to air ducts,
shall be permitted to include air connectors, air duct
fittings, dampers, plenums, fans, and accessory air handling
equipment, but that does not include conditioned spaces.
Air Duct - A conduit for conveying air.
Air Duct Connector - A conduit for transferring air
between an air duct or plenum and an air terminal unit
or an air inlet or an air outlet. (For limitations on use of
air connectors, see Section 2-3.2.1.)
Air Duct Covering - A material such as adhesive,
insulation, banding, a coating(s), film, or a jacket used
to cover the outside surface of an air duct, fan casing, or
duct plenum.
Air Duct Lining - A material such as an adhesive,
insulation, a coating(s), or film used to line the inside
surface of an air duct, fan casing, or duct plenum.
Air Filters - A device used to reduce or remove
airborne solids from heating, ventilating, and air
conditioning systems by mechanical means. (a) A Class 1 air filter is one which, when clean, does not contribute fuel when attacked by flame, and
emits only negligible amounts of smoke when tested in
accordance with RS 13-15. (b) A Class 2 air filter is one which, when clean, burns moderately when attacked by flame or emits
moderate amounts of smoke or both when tested in
accordance with RS 13-15.
Air Inlet - Any opening through which air is removed
from a space and returned to an air distribution system.
Air Outlet - Any opening through which air is delivered
to a space from an air distribution system.
Air Terminal Unit - An appliance receiving, conditioning,
and delivering air supplied through an air distribution system.
Air Transfer Opening - An opening designed to allow
the movement of environmental air between two
contiguous spaces. Approved - See subchapter 2 of the Building Code for
definition.
Authority Having Jurisdiction - Means "The Commissioner
of the Department of Buildings" or his designee.
Blower - A fan used to force air under pressure through
an air duct system.
Ceiling Damper - A device installed to limit radiant
heat transfer through an air outlet or air inlet opening in
the ceiling of a floor/roof-ceiling assembly having not
less than a 1-hour fire resistance rating. Such a device
is described in the construction details for some tested
floor/roof-ceiling assemblies.
Environmental Air - Air that is supplied, returned,
recirculated, or exhausted from spaces for the purpose
of modifying the existing atmosphere within the building.
Exhaust Air - Air removed from a space and not reused.
Exhaust System - An assembly of connected ducts,
plenums, fittings, registers, grilles and hoods through
which air is conducted from the space or spaces and
exhausted to the outside atmosphere.
Fan - An assembly comprising blades or runners and a
housing or casing that is either a blower or an exhaust
fan.
Fire Damper - A device installed in an air distribution
system, that is designed to close automatically upon
detection of heat, to interrupt migratory airflow, and to
restrict the passage of flame. A combination fire and
smoke damper meets the requirements of both.
Fire-Resistance Rating - See subchapter 2 of the Building
Code for definition.
Flame Spread Rating - The measurement of the
comparative rate of propagation of flame over the
surface of a material as determined by a fire test made
in accordance with a specified standard in subchapter
five of [this chapter] the Building Code.
Limited Combustible Material - A building construction
material not complying with the definition of non-
combustible material, which, in the form in which it is
used, has a potential heat value not exceeding 3500 Btu/lb
(8141kj/kg) and complies with one of the following
paragraphs (a) or (b). Materials subject to increase in
combustibility or flame spread index/rating beyond the
limits herein established through the effects of age,
moisture, or other atmospheric condition shall be considered
combustible. (a) Materials having a structural base or noncombustible material, with a surfacing not exceeding a thickness of
one-eighth in. (3.2 mm), that has a flame spread
index/rating not greater than 50. (b) Materials, in the form and thickness used, other than as described in (a), having neither a flame spread
index/rating greater than 25 nor evidence of continued
combustion, and of such composition that surfaces that
would be exposed by cutting through the material on
any plane would have neither a flame spread index/rating Reference Standard 13 168 greater than 25 nor evidence of continued progressive
combustion.
Listed - Equipment, materials or services included in a
list published by an organization acceptable to the
"authority having jurisdiction" and concerned with
evaluation of products or services that maintains periodic
inspection of production of listed equipment, materials
or periodic evaluation of services, and whose listing
states either that the equipment, material or service
meets identified standards or has been tested and found
suitable for use in a specified purpose.
NOTE: The means for identifying listed equipment
may vary for each organization concerned with product
evaluation, some of which do not recognize equipment
as listed unless it is also labeled. The "authority having
jurisdiction" should utilize the system employed by the
listing organization to identify a listed product.
Noncombustible - See subchapter 2 of the Building
Code for definition.
Plenum - An air compartment or chamber located in
one story only to which one or more ducts are connected
and which forms part of the air supply or return system
and may be part of the building construction such as the
concealed space above a ceiling. Any such air
compartment or chamber in more than one contiguous
story shall meet the requirements of Section 2-3.10.
Shall - Indicates a mandatory requirement.
Smoke - The airborne solid and liquid particulars and
gases evolved when a material undergoes pyrolysis or
combustion.
Smoke Barrier - See subchapter 2 of the Building Code
for definition.
Smoke Control - A system that utilizes fans to produce
pressure differences to manage smoke movement.
Smoke Damper - A device to resist the passage of
smoke which:
(a) Is arranged to operate automatically, and
(b) Is controlled by a smoke detector, and
(c) When required shall be capable of being positioned
manually from a remote command station.
A smoke damper may be a fire damper or a damper
serving other functions, if its location lends itself to the
multiple functions. A combination fire and smoke
damper shall meet the requirements of both.
Smoke Detector - A device which senses visible or
invisible particles of combustion.
Smoke Developed Rating - A smoke developed rating
of a material refers to a number or classification of a
material obtained according to RS 5-5. CHAPTER 2 - HVAC SYSTEMS
2-1 General Requirements - Equipment.
2-1.1 Equipment shall be arranged to afford access for
inspection maintenance, and repair. 2-1.2 Equipment shall be selected and installed based on
its proper application with respect to the manufacturer's
installation instructions and listing, as applicable.
2-1.3 Equipment shall be guarded for personnel protection
and against intake or foreign matter into the system.
2-1.4 Electrical wiring and equipment shall be installed
in accordance with NYC Electrical Code.
2-1.5 Equipment Location. - See Section 3-1
2-2 System Components.
2-2.1 Outside Air Intakes and Exhaust.
2-2.1.1 Outside air intakes shall be located to avoid
drawing in combustible material or flammable vapor
and to minimize hazard from fires in other structures.
2.2.1.2 Outside air intakes shall be protected by screens
of corrosion-resistant material not larger than one-half
in. (12.7 mm) mesh.
2-2.1.3 An outdoor air intake opening with gross area
of more than 144 square inches (.0929 m 2 ) shall be provided with fire dampers and smoke dampers, or
combined fire and smoke dampers when such opening
is located as follows:
(a) Less than 30 feet (9.145 m) above grade.
(b) Less than 30 feet (9.145 m) in any direction from
any opening in another building.
(c) Less than 15 feet (4.570 m) from a lot line.
(d) Less than 50 feet (15.240 m) above and less than
50 feet (15.240 m) in any direction from a roof of
combustible material or a building in which the exterior
walls are constructed wholly or partly of wood.
Exception No. 1: Smoke dampers shall not be required
for outdoor air intake openings installed in any
construction required to have a fire resistance rating of
less than two hours.
Exception No. 2: Smoke dampers shall not be required
for outdoor air intake openings of systems greater than
15,000 cfm (7080L/s) which are provided with smoke
dampers in accordance with 2-3.9.2 and arranged as to
not introduce smoke into the building or space in which
the equipment is located.
2-2.1.4 To minimize the hazard from fires and from
noxious, toxic or obnoxious discharges to structures,
any exhaust air discharge to the outside atmosphere
shall terminate at or above the roof or setback roof of
the building or in an exterior wall adjoining a street,
yard or court. Exhaust air discharges shall be at least
10 feet (3.050 m) above the sidewalk or ground and
shall terminate at least 10 feet (3.050 m) from any
window in another building or from any window in a
residential portion of the same building, or from any
fire escape, exterior stair, or balcony. Exhaust system
openings shall be provided with vanes or louvers
constructed so as to direct the air away from windows,
other openings, and pedestrians. Protection of openings
in exterior walls shall be in accordance with Table 3-4
of the Building Code.
2-2.2. Air Cleaners and Air Filters. Reference Standard 13 169 2-2.2.1 Electrostatic air cleaners shall be accepted in
accordance with RS 14-6, and shall be installed in
conformance with the conditions of acceptance.
2-2.2.2 Approved air filters shall have either a Class 1
or Class 2 rating in accordance with RS 13-15.
2-2.2.3 Liquid adhesive coatings used on air filters
shall have flash point not lower than 325 F
(163 C) as determined by RS 14-13.
2-2.2.4 Where air filters are flushed with liquid adhesives,
the system shall be arranged so that the air cleaner
cannot be flushed while the fan is in operation.
2-2.2.5 Liquid adhesive tanks into which removable
filters are dipped should preferably be located outside
the building or in a separate fire resistive room and
stored in accordance with NFiPA 30/96, Flammable
and Combustible Liquids Code. Such tanks shall be of
metal, equipped with tight-fitting covers and shall be
kept tightly covered when not in actual use.
2-2.2.6 All air filters shall be kept free of excess dust
and combustible material. Unit filters shall be renewed
or cleaned when the resistance to airflow has increased
to two times the original resistance or when the resistance
has reached a value of recommended replacement by
the manufacturer. A permanently installed draft gauge
shall be provided for this purpose. Where the filters are
of the automatic liquid adhesive type, sludge shall be
removed from the liquid adhesive reservoir regularly.
2-2.3 Fans.
2-2.3.1 Installation. - Fans shall be installed in accordance
with applicable NFPA standards and manufacturer's
instructions. Fans shall be suitable for the specific installation.
2-2.3.2 Access. - Fans shall be located, arranged and
installed to afford access for inspection and maintenance.
2-2.3.3 Exposed Inlets. - Exposed fan inlets shall be
protected with metal screens to prevent the entry of
paper, trash, and similar foreign materials.
2-2.4 Air Cooling and Heating Equipment.
2-2.4.1 Installation. - Heating and cooling equipment
shall be installed in accordance with applicable NFPA
standards and the manufacturer's instructions. The
equipment shall be approved/accepted for the specific
installation. (See 2-3.3.1.)
2-2.4.2 Appliances. - Materials used in the manufacturing
of fan coil units, self-contained air-conditioning units,
furnaces, heat pumps, humidifiers, and all similar
appliances shall meet the requirements of 2-3.3.1 and
2-3.3.2. Acceptance by the MEA Division of the
Department of Buildings shall be sufficient evidence of
compliance with this requirement.
2-2.4.3 Mechanical Cooling. - Mechanical refrigeration
used with air duct systems shall be installed in accordance
with recognized safety practices and RS 13-6.
2-2.4.4 Furnaces. - Heating furnaces, combined with
cooling units in the same air duct system shall be
installed in accordance with RS 14-2, if gas fired, and
RS 14-3 if oil fired. 2-2.4.5 Duct Heaters. - Where electrical resistance or
fuel burning heaters are installed in air ducts, the air
duct coverings and their installation shall comply with
the provisions of 2-3.5.3. The installation of electrical
duct heaters shall comply with the Electrical Code of
the City of New York.
2-3 Air Distribution.
2-3.1 Air Ducts.
2-3.1.1 Air ducts shall be permitted to be rigid or flexible
and shall be constructed of materials that are reinforced
and sealed to satisfy the requirements for the use of the
air duct system, such as the supply air system, the
return or exhaust air system, and the variable volume/
pressure air system.
2-3.1.2 Air ducts shall be constructed of the following
materials:
(a) Iron, steel, aluminum, copper, concrete, masonry,
or clay tile.
(b) Class 0 or Class 1 rigid or flexible air ducts tested in
accordance with UL 181/96, Standard for Safety
Factory-Made Air Ducts and Air Connectors, and
installed in conformance with the conditions of listing.
Exception No. 1: Class 0 or Class 1 rigid or flexible
air duct shall not be used as a vertical air duct that is
more than two stories in height.
Exception No. 2: Class 0 or Class 1 rigid or flexible
air ducts shall not be used for air ducts containing air
at temperatures in excess of 250 F (121 C). (c) Where the temperature of the conveyed air does not exceed 125 F (52 C) in normal service, negative
pressure exhaust or return air ducts shall be permitted to
be constructed of gypsum board having a maximum
flame spread index/rating of 25 without evidence of
continued progressive combustion and a maximum
smoke developed index/rating of 50.
Exception: The maximum conveyed air temperature of
125 F (52 C) shall not apply to gypsum board
material used for emergency smoke exhaust air ducts.
(d) All air duct materials shall be suitable for continuous
exposure to the temperature and humidity conditions of
the environmental air in the air duct.
2-3.1.3 The materials, thickness, construction, and installation
of ducts shall provide structural strength and durability
in conformance with recognized good practice. Air ducts
shall be considered to be in compliance with this requirement
where constructed and installed in accordance with RS
14-22. Where no standard exists for the construction of
air ducts, they shall be constructed to withstand both the
positive and negative pressures of the system.
2-3.2 Air Connectors.
2-3.2.1 Air connectors are limited-use, flexible air
ducts that shall be required to conform to the provisions
for air ducts where they meet the following requirements: (a) Air connectors shall conform to the requirements for Class 0 or Class 1 connectors when tested and Reference Standard 13 170 approved in accordance with UL 181/96, Standard for
Safety Factory-Made Air Ducts and Air Connectors. (b) Class 0 or Class 1 air connectors shall not be used for ducts containing air at temperatures in excess of
250 F (121 C). (c) Air connector runs shall not exceed 14 ft. (4.265 m) in length. (d) Air connectors shall not pass through any wall, partition, or enclosure of a vertical shaft that is required
to have a fire resistance rating of 1 hour or more. (e) Air connectors shall not pass through floors. 2-3.2.2 Vibration isolation connectors in duct systems
shall be made of an approved flame-retardant fabric or
shall consist of sleeve joints with packing of approved
material, each having a maximum flame spread index/
rating of 25 and a maximum smoke developed index/rating
of 50. The fabric shall have a maximum length of 10
in. (254 mm) in the direction of airflow.
2-3.3 Supplementary Materials for Air Distribution
Systems.
2-3.3.1 Supplementary materials such as duct coverings,
duct linings, vapor retarder facings, adhesives, fasteners,
tapes, and core materials added to air ducts, plenums,
panels, and duct silencers used in duct systems shall
have, in the form in which they are used, a maximum
flame spread
index/rating of 25 without evidence of continued
progressive combustion and a maximum smoke
developed index/rating of 50. Where air duct coverings
and linings are to be applied with adhesives, they shall
have a maximum flame spread index of 25 and a
maximum smoke developed index of 50 when in the
final dry state, (See 2-2.4.2.)
Closure systems for use with rigid air ducts tested in
accordance with UL 181/96, Standard for Safety
Factory-Made Air Ducts and Air Connectors, shall
have been tested and listed in accordance with UL
181A/94, Standard for Safety Closure Systems for Use
with Rigid Air Ducts and Air Connectors, and used in
accordance with the conditions of their listings.
Exception No. 1: This requirement shall not apply to
air duct weatherproof coverings where they are located
entirely outside of a building, do not penetrate a wall or
roof, and do not create an exposure hazard.
Exception No. 2: Smoke detectors required by 4-4.2.
2-3.3.2 Air duct, panel, and plenum coverings and linings
shall not flame, glow, smolder, or smoke when tested in
accordance with similar test for pipe coverings, ASTM
C411/97, Standard Test Method for Hot-Surface Performance
of High-Temperature Thermal Insulation, at the temperature
to which they are exposed in service. In no case shall
the test temperature be below 250 F (121 C).
2-3.3.3 Air duct coverings shall not extend through
walls or floors that are required to be firestopped or
required to have a fire resistance rating. Exception:Where such coverings meet the requirements
of 3-4.6.4.
2-3.3.4 Air duct linings shall be interrupted at fire
dampers to prevent interference with the operation of
devices.
2-3.3.5 Air duct coverings shall not be installed so as
to conceal or prevent the use of any service opening.
2-3.3.6 Pipe insulation and coverings shall meet the
requirements of 2-3.3.1 and 2-3.3.2 where installed in
ducts, plenums, or concealed spaces used as part of the
air distribution system.
2-3.4 Air Duct Access and Inspection.
2-3.4.1 A service opening shall be provided in air ducts
adjacent to each fire damper, smoke damper, and smoke
detector. The opening shall be large enough to permit
maintenance and resetting of the device.
Access doors for fire dampers shall be located so that
the spring catch and fusible links are accessible for
purposes of inspection, resetting or repair. Where the
size of the duct permits, the minimum size access door
shall be 18 in. x 16 in. (457 mm x 406 mm). For
dampers that are too large for an ordinary person’s arms
to reach from outside the duct to reset the damper and
replace the fusible link, the minimum size for the access
door shall be increased to 24 in. x 16 in. (610 mm x 406
mm) to allow the entrance of an individual.
Access doors shall be located as close as practicable to fire
dampers and smoke dampers. If feasible, the underside of
the duct shall be used rather than a side door.
Whenever spring-loaded dampers require the use of two
arms (two persons, if necessary) for re-setting, the
access doors (one on each side of the partition, if
necessary) shall be of sufficient size to allow two arms
to enter the duct. Also refer to Section 27-343 of the
Building Code.
2-3.4.2 Service openings shall be identified with letters
having a minimum height of one-half in. (12.7 mm) to
indicate the location of the fire protection device(s) within.
2-3.4.3 Horizontal air ducts and plenums shall be
provided with service openings (see 2-3.4.1) to facilitate the
removal of accumulations of dust and combustible
materials. Service openings shall be located at approximately
20 ft. (6.095 m) intervals along the air duct and at the
base of each vertical riser.
Exception No. 1: Removable air outlet or air inlet devices of
adequate size shall be permitted in lieu of service openings.
Exception No. 2: Service openings shall not be required in
supply ducts where the supply air has previously passed
through an air filter, an air cleaner, or a water spray.
Exception No. 3: Service openings shall not be required
where all the following conditions exist: (a) The occupancy has no process producing combustible material such as dust, lint, or greasy vapors. Such
occupancies include banks, office buildings, churches,
hotels, and health care facilities (but not kitchens, laundries,
and manufacturing portions of such facilities). Reference Standard 13 171 (b) The air inlets are at least 7 ft. (2.135 m) above the floor or are protected by corrosion-resistant metal screens of at least 14 mesh (0.07 in.) (1.8 mm) that are installed at the inlets so that they cannot draw papers, refuse, or other combustible solids into the return air duct. (c) The minimum design velocity in the return duct for the particular occupancy is 1000 ft./min. (5.080 m/s). 2-3.4.4 Inspection windows shall be permitted in air ducts provided they are glazed with wired glass. However, service openings shall be provided as required in 2-3.4.1. 2-3.4.5 Openings in walls or ceilings shall be provided so that service openings in air ducts are accessible for maintenance and inspection needs. 2-3.4.6 Where a service opening is necessary in an air duct located above the ceiling of a floor/roof-ceiling assembly that has been tested and assigned a fire resistance rating in accordance with RS 5-2, access shall be provided in the ceiling and shall be designed and installed so that it does not reduce the fire resistance rating of the assembly. 2-3.5 Air Duct Integrity. 2-3.5.1 Air ducts shall be located where they are not subject to damage or rupture, or they shall be protected to maintain their integrity. 2-3.5.2 Where an air duct is located outdoors, the air duct, together with its covering or lining, shall be protected from harmful elements. 2-3.5.3 Air Duct at Heat Sources. - Where electrical, fossil fuel, or solar energy collection heat sources are installed in air ducts, the installation shall avoid the creation of a fire hazard. Air ducts rated as Class 1 in accordance with UL 181/96, Standard for Safety Factory-Made Air Ducts and Air Connectors, air duct coverings, and linings shall be interrupted at the immediate area of operation of such heat sources in order to meet the clearances specified as a condition of the equipment listing. Exception No. 1: Appliances listed for zero clearance from combustibles where installed in accordance with the conditions of their listings. Exception No. 2: Insulation specifically suitable for the maximum temperature that reasonably can be anticipated on the duct surface shall be permitted to be installed at the immediate area of operation of such appliances. 2-3.6 Air Outlets. 2-3.6.1 General. - Air supplied to any space shall not contain flammable vapors, flyings, or dust in quantities and concentrations that would introduce a hazardous condition. 2-3.6.2 Construction of Air Outlets. - Air outlets shall be constructed of noncombustible material or a material that has a maximum smoke developed index/rating of 50 and a maximum flame spread index/rating of 25. 2-3.6.3 Location of Air Outlets. (a) Air outlets shall be located at least 3 in. (76 mm) above the floor. Exception: Where provisions have been made to prevent dirt and dust accumulations from entering the system. (b) Where located less than 7 ft. (2.135 m) above the floor, outlet openings shall be protected by a grille or screen having openings through which a one-half in. (12.7 mm) sphere cannot pass. (c) Grilles may be located in floors provided they are installed so that they may be removed for cleaning purposes and provided they are constructed as follows: (1) Grilles up to 3 square feet (0.2787 m 2 ) in gross area shall be designed to support a concentrated live load of 250 lb. (1112N) on any 4 square inches (2580 mm 2 ) of surface. (2) Grilles over 3 square feet (0.2787 m 2 ) in gross area shall be designed to support the same loads as the floor in the area where used. (3) If located where they may be walked upon, the opening in grilles shall reject a one-half inch (12.7 mm) sphere. 2-3.7 Air Inlets (Return or Exhaust or Return and Exhaust). 2-3.7.1 General. - Air shall not be recirculated from any space in which flammable vapors, flyings, or dust is present in quantities and concentrations that would introduce a hazardous condition into the return air system. 2-3.7.2 Construction of Air Inlets. - Air inlets shall be constructed of noncombustible material or a material that has a maximum flame spread index/rating of 25 and a maximum smoke developed index/rating of 50. 2-3.7.3 Location of Air Inlets. (a) Air inlets shall be located at least 3 in. (76 mm) above the floor. Exception: Where provisions have been made to prevent dirt and dust accumulations from entering the system. (b) Where located less than 7 ft (2.135 m) above the floor, inlet openings shall be protected by a grill or screens having openings through which a one-half in. (12.7 mm) sphere cannot pass. (c) Grilles may be located in floors provided they are installed so that they may be removed for cleaning purposes and provided they are constructed as follows: (1) Grilles up to 3 square feet (0.2787 m 2 ) in gross area shall be designed to support a concentrated live load of 250 lb. (1112 N) on any 4 square inches (2580 mm 2 ) of surface. (2) Grilles over 3 square feet (0.2787 m 2 ) in gross area shall be designed to support the same loads as the floor in the area where used. (3) If located where they may be walked upon, the opening in grilles shall reject a one-half inch (12.7 mm) sphere. 2-3.8 Fire Dampers. - Approved fire dampers shall be provided as required in Chapter 3 and installed in conformance with the conditions of their listings. 2-3.9 Smoke Dampers. 2-3.9.1 Approved smoke dampers shall be provided as required in Chapter 3 and installed in conformance with the conditions of their listings. Reference Standard 13 172 2-3.9.2 Smoke dampers shall be installed in systems with a capacity greater than 15,000 cfm (7079 L/s) to isolate the air-handling equipment, including filters, from the remainder of the system in order to restrict the circulation of smoke. Exception No. 1: Where the air-handling unit is located on the floor that it serves and serves only that floor. Exception No. 2: Where the air-handling unit is located on the roof and serves only the floor immediately below the roof. Exception No. 3: Existing buildings using only Class 1 filters shall be exempt from this subdivision provided the control system is arranged to shut down the fresh air intake, return air, and exhaust air dampers, and fan shutdown and smoke detection are provided in accordance with Section 4-4. 2-3.10 Plenums. 2-3.10.1 Ceiling Cavity Plenum. - The space between the top of the finished ceiling and the underside of the floor or roof above shall be permitted to be used to supply air to, or return or exhaust air from, or return and exhaust air from the occupied area provided that the following conditions are met: (a) All materials exposed to the airflow shall be noncombustible or limited combustible and have a maximum smoke developed index/rating of 50. Exception No. 1: The following materials shall be permitted in the ceiling cavity plenum where listed as having a maximum peak optical density of 0.5 or less, an average optical density of 0.15 or less, and a maximum flame spread distance of 5 ft. (1.525 m) or less when tested in accordance with the specified test method: (a) Electrical wires and cables - Electrical wires and cables shall be installed in accordance with the NYC Electrical Code. (b) Pneumatic tubing for control systems - UL 1820/94, Standard for Safety Fire Test of Pneumatic Tubing for Flame and Smoke Characteristics Only. (c) Optical-fiber cables - Optical-fiber cables shall be installed in accordance with the NYC Electrical Code. (d) Optical-fiber cable raceway Optical-fiber cable raceway shall be installed in accordance with the NYC Electrical Code. (e) Fire alarm cables - Fire alarm cables shall be red, type FPLP, and be installed in accordance with Reference Standards RS 17-3, RS 17-3A, RS 17-3B, and RS 17-3C, and be tested and listed in accordance with the requirements of UL 1424/90, UL 910/95 and the City of New York, and shall be marked with the company name, type FPLP, size (AWG), minimum temperature rating 150 C (UL), Also Classified NYC CERT Fire Alarm Cable. Exception No. 2: Smoke detectors. Exception No. 3: Loudspeakers, loudspeaker assemblies, and their accessories shall be permitted in the ceiling cavity plenum where listed as having a maximum peak optical density of 0.5 or less, an average optical density of 0.15 or less, and a peak heat release rate of 100 kW or less when tested in accordance with UL 2043/92, Standard for Safety Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air-Handling Spaces. (b) The integrity of the firestopping for penetrations shall be maintained. (c) Light diffusers, other than those made of metal or glass, used in air-handling light fixtures shall be listed and marked "Fixture Light Diffusers for Air-Handling Fixtures." (d) The temperature of air delivered to these plenums shall not exceed 250 F (121 C). (e) Materials used in the construction of a ceiling plenum shall be suitable for continuous exposure to the temperature and humidity conditions of the environmental air in the plenum. (f) Where the plenum is a part of a floor-ceiling or roof- ceiling assembly that has been tested or investigated and assigned a fire resistance rating of 1 hour or more, the assembly shall meet the requirements of 3-3.3. (g) All portions of the ceiling cavity plenum shall be designed to withstand the maximum air pressure differential that may be developed. 2-3.10.2 Duct Distribution Plenum. - A duct enclosure used for the multiple distribution or gathering of ducts or connectors shall be constructed of materials and methods specified in 2-3.1. 2-3.10.3 Apparatus Casing Plenum. - A fabricated plenum and apparatus casing shall be permitted to be used for supply, return, or exhaust air service and shall be constructed of materials and methods specified in 2- 3.1, and in accordance with the following: (a) The casing and plenum construction standards, as per RS 14-22. (b) Paragraph 2-3.3 for all air duct coverings, duct lining acoustical liner/cells, and miscellaneous materials. 2-3.10.4 Air-Handling Unit Room Plenum. (a) Individual rooms containing an air-handling unit(s) gather return air from various sources and combine the return air within the room for returning to the air-handling unit. Duct covering, duct lining, acoustical liner/cells, and miscellaneous materials shall comply with 2-3.3. (b) Air-handling unit room plenums shall not be used for storage or occupied other than during equipment servicing. 2-3.10.5 Raised Floor Plenum. - The space between the top of the finished floor and the underside of a raised floor shall be permitted to be used to supply air to, or return exhaust air from, or return and exhaust air from the occupied area, provided that the following conditions are met: (a) All materials exposed to the airflow shall be noncombustible or limited combustible and shall have a maximum smoke developed index/rating of 50. Reference Standard 13 173 Exception No. 1: The following materials shall be permitted in the raised floor plenum where listed as having a maximum peak optical density of 0.5 or less, an average optical density of 0.15 or less, and a maximum flame spread distance of 5 ft. (1.525 m) or less when tested in accordance with the specified test method: (a) Electrical wires and cables - Electrical wires and cables shall be installed in accordance with the NYC Electrical Code. (b) Pneumatic tubing for control systems - UL 1820/94, Standard for Safety Fire Test of Pneumatic Tubing for Flame and Smoke Characteristics Only. (c) Optical-fiber cables - Optical-fiber cables shall be installed in accordance with the NYC Electrical Code. (d)Optical-fiber cable raceway - Optical-fiber cable raceway shall be installed in accordance with the NYC Electrical Code. (e) Fire alarm cables - Fire alarm cables shall be red, type FPLP, and be installed in accordance with Reference Standards RS 17-3, RS 17-3A, RS 17-3B, and RS 17-3C, and tested and listed in accordance with the requirements of UL 1424/90, UL 910/95 and the City of New York, and shall be marked with the company name, type FPLP, size (AWG), minimum temperature rating 150 C (UL), Also Classified NYC CERT Fire Alarm Cable. Exception No. 2: Raised floors, intermachine cables, electrical wires, listed plenum optical-fiber cable raceways, and optical-fiber cables in computer/data processing rooms where these rooms are designed and installed in accordance with NFPA 75/95, Standard for the Protection of Electronic Computer/Data Processing Equipment. Exception No. 3: Smoke detectors. (b) The integrity of the firestopping for penetrations shall be maintained. (c) The temperature of air delivered to these plenums shall not exceed 250 F (121 C). (d) Materials used in the construction of a raised floor plenum shall be suitable for continuous exposure to the temperature and humidity conditions of the environmental air in the plenum. 2-3.11 Corridor Air Systems. 2-3.11.1 Egress Corridors. - Except in fully sprinklered office buildings, public corridors shall not be used as a portion of direct supply, return, or exhaust air system serving adjoining areas. Air transfer because of pressure differential in health care occupancies from corridors is permitted. An air transfer opening(s) shall not be permitted in walls or in doors separating egress corridors from adjoining areas. Exception No. 1: Toilet rooms, bathrooms, shower rooms, sink closets, and similar auxiliary spaces opening directly onto the egress corridor. Exception No. 2: Where door clearances do not exceed those specified for fire doors in RS 5-8, air transfer caused by pressure differentials shall be permitted. Exception No. 3: Use of egress corridors as part of an engineered smoke-control system. Exception No. 4: In detention and correctional occupancies with corridor separations of open construction (e.g., grating doors or grating partitions). Exception No. 5: In existing buildings classified in Occupancy Group J-1 ventilation may be provided in accordance with Section 27-777.2(a) of the Administrative Code. Exception No. 6: In institutions as classified in article 10 of subchapter 3 of the Administrative Code provided the system(s) serving the corridor have smoke detectors located as required in Section 4-4.1 of this Reference Standard that will shut down fans upon activation. 2-3.11.2 Exits. - Exit passageways, stairs, ramps, and other exits shall not be used as a part of a supply, return, or exhaust air system serving other areas of the building. 2-3.12 Smoke Control. - Where a smoke-control or exhaust system is required, it shall conform to the requirements of the building code. CHAPTER 3 - INTEGRATION OF A VENTILATION AND AIR CONDITIONING SYSTEM(S) WITH BUILDING CONSTRUCTION 3-1 Air-Handling Equipment Rooms. 3-1.1 General. - Air-handling equipment rooms generally fall into three categories: (a) Those used as air plenums (usually return air); (b) Those with air ducts that open directly into a shaft; and (c) Other air-handling unit rooms. 3-1.2 Air-Handling Equipment Rooms Used as Plenum Space. - Air-handling unit rooms used as plenums for supply or return air shall comply with 2-3.10.4. 3-1.3 Air-Handling Equipment Rooms that Have Air Ducts that Open Directly into a Shaft. Air-handling equipment rooms, including the protection of openings, shall be separated from shafts by construction having a fire resistance rating not less than that required for the shaft by 3-3.4. Exception: Fire-resistant separation shall not be required for air-handling equipment rooms that are enclosed by construction having a fire resistance rating not less than that required for the shaft. 3-1.4 Other Spaces Housing Air-Handling Units. - Other spaces housing air-handling units shall meet the requirements of the building code. [of the authority having jurisdiction] 3-2 Building Construction. 3-2.1 Air Duct Clearance. - The clearance from metal air ducts to assemblies constructed of combustible materials, including plaster on wood lath, shall be not less than one-half in. (12.7 mm), or the combustible material shall be protected with minimum one-quarter in. (6.4 mm) firestopping material as per the Building Code. The integrity of the firestopping and smokestopping shall be maintained. Exception: This clearance shall not apply to systems used solely for ventilation, air cooling, or air conditioning without heating. Reference Standard 13 174 3-2.2 Structural Members. - The installation of air ducts, including the hangers, shall not reduce the fire resistance rating of structural members. 3-2.3 Where the installation of the hangers for the components of an air duct system penetrates an existing ceiling of a fire-resistive floor/roof-ceiling assembly and necessitates removal of a portion of that ceiling, the replacement material shall be identical to or approved as equivalent to that which was removed. Exception: As an alternative to repairing the existing ceiling, a new ceiling shall be permitted to be installed below the air duct system, provided the fire resistance rating of the floor/roof-ceiling design is not reduced. 3-3 Penetrations - Protection of Openings. - For examples of the application of the penetration protection requirements, see Figure 3-3. 3-3.1 Fire-Rated Walls and Partitions. 3-3.1.1[*]Approved fire dampers shall be provided where air ducts penetrate or terminate at openings in walls or partitions required to have a fire resistance rating pursuant to Section 27-343 of the Administrative Code. In addition, approved fire dampers shall be provided in outdoor intake openings in accordance with Section 2-2.1.3. (See Figure 3-3). Exception: Fire dampers shall not be required where other openings through the wall are not required to be protected. 3-3.1.2 Approved fire dampers shall be provided in all air transfer openings in partitions required to have a fire resistance rating and in which other openings are required to be protected. 3-3.2 Floors Required to Have a Fire Resistance Rating. - Where air ducts extend through only one floor and serve only two adjacent stories, the air ducts shall be enclosed (see 3-3.4.1) or fire dampers shall be installed at each point where the floor is penetrated Exception: Air ducts serving air conditioning terminal devices on the floor above, provided a fire test conducted in accordance with RS 5-2, determines that the fire resistance rating of the floor is maintained. 3-3.3 Floor/Roof -Ceiling Assemblies Having a Fire Resistance Rating. - Where air ducts and openings for air ducts are used in a floor/roof-ceiling assembly required to have a fire resistance rating, all the materials and the construction of the assembly, including the air duct materials and the size and protection of the openings, shall conform with the design of the fire- resistive assembly, as tested in accordance with RS 5-2. (Where dampers are required, see 3-4.4.) 3-3.4 Shafts. 3-3.4.1 Enclosure of Ducts. - (a) Air ducts that pass through the floors of buildings requiring the protection of vertical openings shall be enclosed with partitions or walls constructed of materials as permitted by the Building Code, section 27-344. Exception: Where an air duct penetrates only one floor and the air duct contains a fire damper located where the duct penetrates the floor, an air duct enclosure shall not be required. (b) Ducts passing through two or more floors, or through a floor and a roof, and having a cross-sectional area of more than 2 square feet (0.1858 m 2 ) shall be encased in shafts of noncombustible construction having a minimum 2-hour fire resistance rating. Where the cross-sectional area is 2 square feet (0.1858 m 2 ) or less, such ducts may be fire protected with construction having a minimum fire resistance rating of 1 hour placed as close as possible to the duct in lieu of a shaft, with the space between the duct and the floor construction filled solidly with inert noncombustible material for the full depth of the floor construction. Exceptions and qualifications are as follows: (1) The encasing of ducts shall not be required for ducts which are cut off from the main portion of the duct by approved fire dampers. (2) Ducts which are located in one story and have all duct openings extending through a floor to the story next above or below may in lieu of such fire resistive enclosure be provided with approved fire dampers at each such point where the floor is pierced. (3) Two or more ducts serving separate floors shall not be encased in the same fire resistive enclosure unless approved fire dampers are installed where each branch is taken from such encased ducts. (4) A branch duct having a cross-sectional area of less than 20 square inches (12900 mm 2 ) which passes through one floor only and pierces the floor at one point only to supply air conditioning units in one story only is not required to be encased. Where a branch serves connectors which pierce the floor at more than one point, the portion of the duct below the floor shall be encased with not less than one-half inch (12.7 mm) of noncombustible insulating material such as metal lath and plaster or shall be enclosed with noncombustible material such as by locating above a noncombustible ceiling. 3-3.4.2 A fire-resistive enclosure used as an air duct shall conform with 3-3.4.1 and 2-3.1. Gypsum board systems shall be constructed in accordance with RS 5- 1A or RS 5-1B, and the corners of such systems shall be constructed in accordance with details approved by the Board of Standards and Appeals under Calendar Number 354-76-SM or equivalent. 3-3.4.3 Shafts that constitute air ducts or that enclose air ducts used for the movement of environmental air shall not enclose: (a) Exhaust ducts used for the removal of smoke and grease-laden vapors from cooking equipment; (b) Ducts used for the removal of flammable vapors; (c) Ducts used for moving, conveying, or transporting stock, vapor or dust; (d) Ducts used for the removal of nonflammable corrosive fumes and vapors; (e) Refuse and linen chutes; or (f) Piping. Exception: Noncombustible piping conveying water or other nonhazardous or nontoxic materials. Reference Standard 13 175 Reference Standard 13 176 3-3.4.4 Fire dampers shall be installed at each direct or ducted opening into or out of enclosures required by 3-3.4.1. Exception No. 1: Where an air duct system serving only one story is used only for exhaust of air to the outside and is contained within its own dedicated shaft. Exception No. 2: Where branch ducts connect to enclosed exhaust risers meeting the requirements of 3- 3.4.1 or 3-3.4.2 in which the airflow moves upward and steel subducts at least 22 in. (559 mm) in length are carried up inside the riser for each inlet and the riser is appropriately sized to accommodate the flow restriction created by the subduct. (See Figure 3-3) Exception No. 3: Where such openings are provided for ducts serving air terminal units and the ducts or duct connectors meet all of the following conditions (See Figure 3-3): (a)They have a cross-sectional area of less than 20 sq. in. (12900 mm 2 ); (b)They meet the requirements specified in 2-3.1; (c)They serve air terminal units which directly abut the shaft enclosure or have continuous architectural enclosures constructed the same as the air terminal unit; and (d)They meet the requirements of 3-4.6.4. 3-3.5 Location of Smoke Dampers. 3-3.5.1 Smoke dampers shall be installed at or adjacent to the point where air ducts pass through required smoke barriers, partitions adjacent to spaces leading from elevators to a street or to the exterior of a building, and any construction required to have a rating of 2 hrs. or more, but in no case shall a smoke damper be installed more than 2 ft. (610 mm) from the barrier or after the first air duct inlet or outlet, whichever is closer to the smoke barrier. Exception No. 1: Smoke dampers shall not be required on air systems other than where necessary for the proper function of that system where the system is designed specifically to: (a)Function as an engineered smoke-control system, including the provision of continuous air movement with the air-handling system; or (b)Provide air to other areas of the building during a fire emergency; or (c)Provide pressure differentials during a fire emergency. Exception No. 2: Smoke dampers shall not be required to be located within a prescribed distance of a fire rated enclosure where isolation smoke dampers are used in air-handling equipment. (See 2-3.9.2) Exception No. 3: Buildings classified in Occupancy Group J-2. Exception No. 4: Smoke dampers shall not be required in ducts where the air continues to move and the air- handling system installed is arranged to prevent recirculation of exhaust or return air under fire emergency conditions. 3-3.5.2 Where penetration of a smoke barrier is required to be provided with a fire damper, a combination fire and smoke damper equipped and arranged to be both smoke responsive and heat responsive shall be permitted. 3-3.5.3 The above requirements are applicable to new buildings and existing buildings where new fire rated partitions are erected or where existing ducts are being modified or reconfigured in such a way as to require the installation of smoke and/or fire dampers. 3-4 Fire Dampers, Smoke Dampers, and Ceiling Dampers. 3-4.1 Fire dampers used for the protection of openings in walls, partitions, or floors with fire resistance ratings of less than 3 hours shall have a one and one-half-hour fire protection rating in accordance with UL 555/99, Standard for Safety Fire Dampers. 3-4.2 Fire dampers used for the protection of openings in walls, partitions, or floors having a fire resistance rating of 3 hours or more shall have a 3-hour fire protection rating in accordance with UL 555/99, Standard for Safety Fire Dampers. 3-4.3 Smoke dampers used for the protection of openings in smoke barriers or in engineered smoke-control systems shall be classified in accordance with UL 555S/99, Standard for Safety Leakage Rated Dampers for Use in Smoke Control Systems. 3-4.4 Ceiling dampers or other methods of protecting openings in rated floor/roof-ceiling assemblies shall comply with the construction details of the tested floor/roof-ceiling assembly or with listed ceiling air diffusers, or with listed ceiling dampers. Ceiling dampers shall be tested in accordance with UL 555C/96, Standard for Safety Ceiling Dampers. 3-4.5 Damper Closure. 3-4.5.1 All fire dampers and ceiling dampers shall close automatically, and they shall remain closed upon the operation of a listed fusible link or other approved heat-actuated device located where readily affected by an abnormal rise of temperature in the air duct. 3-4.5.2 Fusible links shall have a temperature rating approximately 50 F (28 C) above the maximum temperature that normally is encountered when the system is in operation or shut down, but not less than 160 F (71 C). Exception: Where combination fire/smoke dampers are located within air ducts that are part of an engineered smoke-control system, fusible links or other approved heat-responsive devices shall have a temperature rating approximately 50 ΕF (28 C) above the maximum smoke-control system designed operating temperature, but shall not exceed the UL 555S/99, Standard for Safety Leakage Rated Dampers for Use in Smoke Control Systems degradation test temperature rating of the combination fire/smoke damper or a maximum of 350 F (177 C). 3-4.5.3 A provision for remote opening of combination fire and smoke dampers, where necessary for smoke removal, shall be permitted. Such dampers shall have provisions that allow them to reclose automatically upon reaching the damper's maximum degradation test temperature in accordance with UL 555S/99, Standard for Safety Leakage Rated Dampers for Use in Smoke Control Systems. 3-4.5.4 Dampers shall close against the maximum calculated airflow of that portion of the air duct system in which they are installed. Fire dampers shall be tested in accordance with UL 555/99, Standard for Safety Fire Reference Standard 13 177 Dampers. Smoke dampers shall be tested in accordance with UL 555S/99, Standard for Safety Leakage Rated Dampers for Use in Smoke Control Systems. Exception: Where provisions for fan or airflow shutdown are provided. 3-4.6 Installation. (See 2-3.4 for access) 3-4.6.1 The locations and mounting arrangement of all fire dampers, smoke dampers, ceiling dampers, and fire protection means of a similar nature required by this standard shall be shown on the mechanical plans pursuant to section 27-157(c) or 27-162 of the Building Code. 3-4.6.2 Fire dampers (including their sleeves), smoke dampers, and ceiling dampers shall be installed in accordance with the conditions of their listings and the manufacturer's installation instructions. 3-4.6.3 The thickness of sleeves for fire dampers shall not be less than that associated with the conditions of rating required by Section 3-4. Exception: Where UL 555/99, Standard for Safety Fire Dampers, permits sleeve thickness to be the same as that of the duct gage, such thickness shall not be less than that specified in Table 3-4.6.3. Table 3-4.6.3 Minimum Sleeve Thickness Permitted in Accordance with UL 555/99 (See 3-4.6.3 Exception.) Air Duct Diameter Or Moximum Width Minimum Sleeve Thickness (in.) (mm.) (in.) (mm.) 12 or lees 305 0.018 26 13-30 330-762 0.024 24 31-54 181-1370 0.030 22 55-84 1395-2135 0.036 20 85 or more 2160 0.047 18 3-4.6.4 Patching, Filling, and Repairing. Where air ducts pass through walls, floors or partitions required to have a fire resistance rating and where fire dampers are not required, the opening in the construction around the air duct shall not exceed a 1-in. (25.4 mm) average clearance on all sides and shall be firestopped in accordance with the Building Code. Exception: Where fire dampers are installed, proper clearance for expansion shall be maintained. (See 3-4.6.) CHAPTER 4 - CONTROLS 4-1 Wiring. The installation of electrical wiring and equipment associated with the operation and control of air conditioning and ventilating systems shall be in accordance with the Electrical Code of the City of New York. 4-2 Manual Control. Each air distribution system shall be provided with not less than one manually operable means to stop the operation of the supply, return, and exhaust fans(s) in an emergency. The means of manual operation shall be located at an approved location. 4-2.1 Any building classified in Occupancy Group E, 75 feet (22.840 m) or more in height, and any existing office building 100 feet (30.450 m) or more in height where a system serves floors other than the floor on which the equipment is located, in addition to the controls required by this chapter, shall be provided with: (a) Manual controls for operating individually each air supply and each exhaust or return fan in the system located as follows: (1) At the Fire Command Station, (or in a mechanical control center in existing buildings only), and (2) In the room containing the affected air handling fans. (b) Manual controls for operating individually or in groups each remote control reversible fire shutter, when such shutters are provided in accordance with the provisions of Section 27-972 of the Administrative Code, or each smoke damper provided in accordance with the provisions of Section 27-777.1(b) of the Administrative Code, shall be located at the Fire Command Station, (or in a mechanical control center in existing buildings only). 4-2.2 Manual Restart of Fans After Reset of an Automatic Fire Detecting Device or Fire Alarm System. Fans or fan systems which have been automatically shut down on activation of an automatic fire detecting device or fire alarm system shall be arranged and equipped not to automatically restart when either the automatic fire detecting device or fire alarm system is reset. The manual means of restarting the fans or fan system shall function independently from the manual resetting of either the automatic fire detecting device or fire alarm system. 4-3 Smoke Dampers. 4-3.1 Smoke dampers shall be activated by an automatic smoke and/or alarm initiating device. Smoke dampers that are part of an engineered smoke control system shall be capable of being positioned manually from a command station. Such positioning devices shall be provided, for supply and return/exhaust dampers, grouped by floor and by type (i.e. supply or return/ exhaust). Damper switch positions shall indicate whether the related dampers are commanded to be either open or closed. Smoke damper positioning switches shall be located at the Fire Command Station, or in a mechanical control center in buildings without a Fire Command Station. Refer to Section 27-777.1(b) of the Building Code for additional requirements. 4-3.2 Smoke dampers installed to isolate the air- handling system in accordance with 2-3.9.2 shall be arranged to close automatically when the system is not in operation. 4-3.3 Smoke dampers installed in smoke barriers shall be permitted to remain open during fan shutdown, provided their associated controlling damper actuators and smoke detectors remain operational. 4-4 Smoke Detection for Automatic Control. 4-4.1 Location. Smoke detectors listed for use in air distribution systems shall be located: (a) Downstream of the air filters and ahead of any branch connections in air supply systems having a capacity greater than 2000 cfm (944 L/s). (b) At each story in buildings classified in Occupancy Group E, 75 ft. (22.838 m) or more in height, and in existing office buildings 100 ft. (30.450 m) or more in Reference Standard 13 178 height prior to the connection to a return air shaft in air return systems having a capacity greater than 15,000 cfm (7080 L/s) and serving more than one story except that in an existing office building 100 feet (30.450 m) or more in height where compliance would cause practical difficulty or undue hardship, the Commissioner may approve other locations for such devices fulfilling the intent of the requirement. (c) In the return air stream, prior to exhausting from the building and prior to any recirculation or fresh air inlet connection in air return systems having a capacity equal to or greater than 15,000 cfm (7080 L/s) arranged to either automatically exhaust the smoke laden return air or to stop the fan. Exception No. 1: Return system smoke detectors shall not be required where the entire space served by the air distribution system is protected by a system of area smoke detectors. Exception No. 2: Fan units whose sole function is to remove air from the inside of the building to the outside of the building. Exception No. 3: Systems meeting the criteria for Exceptions Nos. 1 or 2 in Section 2-3.9.2. Exception No. 4: Smoke detectors provided in accordance with (b) above shall fulfill the requirement of (c) above. 4-4.2 Function. Smoke detectors provided as required by 4-4.1 shall automatically stop their respective fan(s) upon detecting the presence of smoke. Exception: Where the return air fan is functioning as part of an engineered smoke-control system and a different mode is required. 4-4.3 Installation. 4-4.3.1 In addition to the requirements of 4-4.2, where an approved protective signaling system is installed in a building, the smoke detectors required by the provisions of Sections 4-3 and 4-4 shall be connected to the protective signaling system in accordance with the requirements of the Building Code, so that the activation of any air distribution system smoke detector causes a supervisory signal to be indicated at a constantly attended location or causes an alarm signal. 4-4.3.2 Where smoke detectors required by Section 4-4 are installed in a building not equipped with an approved protective signaling system as specified by 4-4.3.1: (a) The smoke detector activation required by Section 4-4 shall cause a visual and an audible signal in a normally occupied area; and (b) Smoke detector trouble conditions shall be indicated visually or audibly in a normally occupied area and shall be identified as air duct detector trouble. 4-4.3.3 Smoke detectors powered separately from the signaling system for the sole function of stopping fans shall not require standby power. 4-4.3.4 When any building or floor is provided with an air system utilizing recirculated air and is protected by an automatic sprinkler system or an automatic fire alarm system, provision shall be made to automatically stop the fans serving the affected area when the sprinkler system or fire alarm system operates. Where both sprinkler systems and fire alarm systems are installed in the area, it shall be required to have only one of these systems arranged to stop the fans. Exception No. 1: Activation of a manual pull station shall not be required to automatically stop the fans. Exception No. 2: Systems having a capacity of 2,000 cfm or less or serving not more than one floor. ***DOB 5-4-02; 17-87 BCR; Local Law 16-1984 *REFERENCE STANDARD RS 13-2 Exhaust Systems for Cooking Spaces 1. Construction-Exhaust systems for cooking spaces shall be separate systems that may exhaust a number or such spaces. The ductwork shall be constructed as required by Reference Standard RS 13-1, with the following modifications: (a) Ducts shall be of galvanized steel and the minimum gage shall be as follows: (1) In all buildings other than those classified as residential occupancy, a minimum of no. 16 galvanized sheet gage shall be used. (2) In residential occupancies other than one-

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