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§ 1521.11
<br />DWELLING HOUSE CODE
<br />30
<br />1521.11 The American Society of Mechanical Engineers.
<br />1949 with Rules for Construction of Low Pressure Heating Boilers.
<br />addenda 8/8/51
<br />1521.12 Standards of the American Standards Association: Prefix "A."
<br />A102-1944 Safety Code for Building Construction.
<br />Except that:
<br />Subsection 1.8 of Part 9, Scaffolds, shall
<br />be considered amended and as amended
<br />shall read:
<br />"All lumber used in the construction of
<br />scaffolds shall be of scaffold grade. or stress
<br />grade."
<br />A21.4-1939 Specifications for Cement Mortar Lining far Cast-Iron Pipe and
<br /> Fittings.
<br />A40.1-1935 Cast-Iron Soil Pipe and Fittings.
<br />A40.2-1936 Brass Fittings for Flared Copper Tubes.
<br />A4D.4-1942
<br />A40.6-1943 Air Gaps and Backflow Preventers in Plumbing Systems.
<br />A40.5-1943 Threaded Cast-Iron Pipe for Drainage, Vent and Waste Services.
<br />A41.1-1944 Building Requirements for Masonry.
<br />A42.1-1950 Specifications for Gypsum Plastering and Interior Lathing and
<br />A42,4-1950 Furring.
<br />A42.2-1946 Specifications for Portland Cement Stucco and Portland Cement
<br />A42.3-1946 Plastering.
<br />A62.4-1947 Sizes of Clay Flue Linings.
<br />A87.1-1947 Building Requirements for Steel Joist Construction.
<br />1521.13 Standards of the American Standards Association: Prefix ")i:'
<br />B 2.1-1945 Pipe Threads. ,
<br />B16.3-1951 Malleable-Iron Screwed Fittings, 150 lb.
<br />B16.4-1949 Cast-Iron Screwed Fittings, 125 and 2501bs.
<br />B16.12-1942 Cast-Iron'Screwed Drainage Fittings.
<br />B16.15-1947 Brass or Bronze Screwed Fittings, 125,1b,
<br />B16:18-1950 ~. Cast Brass Solder-Joint Fittings.
<br />B31.1-1951 Code for Pressure Piping,
<br />1521.14 Standards of the American Standards Association: Prefix "C:'
<br />C1-1951 National Electrical Code
<br /> (Same as NBFU No. 70 and NFPA No. 70)
<br />Except that:
<br />(a) Sub-paragraph (b) entitled, Recep-
<br />tacle Circuits (Dwelling Occupancies), of
<br />Paragraph 2115 of Article 210, shall be con-
<br />sidered amended and as amended shall read;
<br />"For the small appliance load .in bath-
<br />room, kitchen, laundry, pantry, dining room
<br />and breakfast room of dwelling occupancies,
<br />not more than four appliance receptacle
<br />outlets shall be installed on any one ap-
<br />pliance circuit. In all other rooms, there
<br />shall be not more than six receptacle out-
<br />lets per circuit. The conductors of such cir-
<br />cuits shall be not smaller than No. 12. Out-
<br />lets for clocks maybe provided on the light-
<br />ing circuit."
<br />(b) Sub-paragraph (a-1) entitled, In
<br />Listed Occupancies, of Paragraph 2116 of
<br />Article 210, shall be considered as amended
<br />by adding at the end thereof; the following:
<br />"At least one outlet controlled by a wall
<br />switch shall be provided for each habitable
<br />room, kitchen, toilet room, and bathroom. A
<br />lighting outlet shall be provided at laundry
<br />trays, and at boilers, furnaces, and other
<br />central heating devices. Three-way switches
<br />shall be provided for all stairways to con-
<br />trol lighting outlets illuminating such stair-
<br />ways."
<br />(c) Sub-paragraph (b) entitled, Dwell=
<br />ing Type Occupancies, of Paragraph 2124,
<br />of Article 210, shall be considered amended
<br />and as amended shall read:
<br />"In every dining room, hallway, recrea-
<br />tion and sun room, one receptacle outlet
<br />shall be provided for every 20 linear feet or
<br />major fraction thereof of the total distance
<br />around the room, and in every other habit-
<br />able room, one receptacle outlet shall be
<br />provided-#or every 12 linear feet or major
<br />
<br />a
<br />C
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<br />:7
<br />95
<br />Heating Appliances and Systems
<br />thereto shall ~be without a damper; provided
<br />that this requirement shall not apply to sys-
<br />tems where dampers and shutters cannot
<br />shut off more than 80 per cent of the duct
<br />area.
<br />(i) Registers in floor over f urnace. Where
<br />registers are installed ir_ the floor over a fur-
<br />nace, the register box shall be constructed
<br />double with not less than a 4 inch air space,
<br />except where the warm air passage is sur-
<br />rounded by a cold air passage or where the
<br />furnace is oil- or gas-fired and automatically
<br />controlled so that the temperature of the de-
<br />livered air cannot exceed 150 F. Where but
<br />one duplex grating is used for both warm
<br />air and return air, the area of the return air
<br />intake shall. be at least equal to the warm
<br />air outlet of the grating. In no case shall the
<br />top of the heater within the furnace casing
<br />be closer than 12 inches to combustible con-
<br />struction or material.
<br />(j) Gravity warm air supply ducts near
<br />combustible construction. On gravity warm
<br />air heating systems, where supply ducts en-
<br />ter afloor, partition, or enclosure of com-
<br />bustible construction within a horizontal dis-
<br />tance of 6 feet from the furnace, the warm
<br />air supply pipe or duct connected thereto
<br />shall be arranged so that heated air must
<br />travel at least 6 feet from the closest primary
<br />heating surface and change direction equiv-
<br />alent to at least 90° before entering such
<br />floor, partition, or enclosure.
<br />(k) Forced warm air supply ducts near
<br />combustible construction. On forced warm
<br />air heating systems, all warm air supply
<br />pipes or ducts directly connected to a fur-
<br />nace bonnet or plenum and installed adja-
<br />cent to combustible construction shall run
<br />horizontally at least 2 feet and shall have not
<br />less than one angle or elbow before turning
<br />vertically upward; or there shall be ,other
<br />provisions approved by the Building Official
<br />to protect combustible construction from di-
<br />rect heat radiation from the furnace.
<br />(1) Forced warm air ducts within com-
<br />bustible construction less than 6 feet from
<br />furnace. On forced warm air heating sys-
<br />tems, portions of warm air supply pipes or
<br />ducts which are installed within combustible
<br />partitions, walls, or floor construction and
<br />are within 6 feet of the closest primary heat-
<br />ing surface of the furnace shall have a
<br />clearance from combustible material of not
<br />less than 1 inch.
<br />(m) Horizontal warm air ducts near ceil-
<br />ing. Portions of warm air supply pipes or
<br />ducts-which -run in the open, such as those
<br />which run approximately horizontal and
<br />§ 1591.43
<br />near the ceiling, shall have clearances as
<br />follows:
<br />i. From metal, pipes or ducts to combus-
<br />tible material, including plaster on wood
<br />lath-not less than 1 inch;
<br />ii. From metal pipes or ducts to plaster on
<br />metal lath or gypsum lath or other equivalent
<br />noncombustible finish attached to combus-
<br />tible material-not less than ~/4 inch;
<br />iii. From metal pipes or ducts covered
<br />with 1/4 inch or more of noncombustible in-
<br />sulating material, to combustible material-
<br />not less than ~4 inch;
<br />iv. From pipes or ducts made of asbestos-
<br />cement or equivalent, to combustible mate-
<br />rial-~/z that specified for metal pipes or
<br />ducts.
<br />(n) Entering first Roar. Where warm air
<br />supply pipes or ducts enter the floor of the
<br />first story, above that in which a furnace is
<br />situated, at points more than 6 feet from the
<br />closest primary heating surface of the fur-
<br />nace measured along the line of heated air
<br />travel, they shall be separated from all com-
<br />bustible material of the floor construction by
<br />at feast 5/16 inch, or the pipe or duct shall
<br />be of double wall construction with a con-
<br />tinuous air space of not less than 5/16 inch
<br />between the inner and outer walls.
<br />(o) Enclosed in combustible construction
<br />more than 6 f eet f rom f urnace. Where warm
<br />air supply pipes or ducts are enclosed in com-
<br />bustible partitions, walls, or floor construc-
<br />tion and are more than 6 feet from the closest
<br />primary heating surface of the furnace meas-
<br />ured along the line of heated air travel-
<br />i. They shall be installed with an air space
<br />of not less than 5/16 inch between pipe or
<br />duct and combustible material; or
<br />ii. Such pipes or ducts shall be made
<br />double with a continuous air space of,not less
<br />than 5/16 inch between. the inner and' outer
<br />walls; or
<br />iii. Such pipes or ducts shall be ~4=inch
<br />thick asbestos-cement or equivalent, sepa-
<br />rated from combustible material by an air
<br />space of not less than ~/s inch.
<br />(p) In closets. Where warm air supply
<br />pipes or ducts are located in closets they
<br />shall be covered with not less than i/4 inch
<br />asbestos air-cell or equivalent fire-resistive
<br />insulating covering protected against injury;
<br />or they shall be made double with an air
<br />space of not less than one inch between the
<br />inner and outer walls. The air space may be
<br />reduced to 5/16 inch provided the outer
<br />wall is covered with r_ot less than 12-1b: as-
<br />bestos paper.
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