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American Society of Heating and Ventilating Engineers Guide, 1931 Iron or steel.
Bronze, brass, copper and compositions.
White metal. Aluminum, zinc, lead, babbitt and alloys.
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Electric insulation. Vulcanite, fibre, mica, Bakelite, etc.
Sound or heat insula tion. Cork, hair-felt, wool, asbestos, magnesia, etc.
Flexible material. Fabric, felt, rubber, etc.
Concrete.
Water and other liquids.
Across grain' Wood1
With grain
7The symbols for wood may be used for sections and outside views.
sUsed for outside' views but not for sections.
Brickor stone masonry.
Brick.8
Lv .
Stone.!
Transparent material.?. Glass, celluloid, etc.
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Chapter 2
PHYSICAL UNITS AND TABLES
PHYSICAL UNITS
One British thermal unit (B.t.u.) = -rir of the heat required to
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raise the temperature of 1 lb. of water from 32 deg. to 212 deg. fahr. This is substantially equal to the quantity of heat required to raise 1 lb.
of water from 63 deg. to 64 deg. fahr.
One mean calorie =
of the heat required to raise 1 gram of water
from 0 deg. to 100 deg. cent. This is substantially equal to the quantity of heat required to raise one gram of water from 17 deg. to 18 deg. cent.
One mean calorie = 0.003968 B.t.u. = 3.085 ft. lb. = 0.0011626 w.hr.
Power, Work, Etc. 1 ton refrigeration Latent heat of ice
1 B.t.u. (British thermal unit)
1 watt hour (w.hr.)
1 kilowatt (1,000 watts) (kw)
1 horsepower (hp.)
1 mech. horsepower
1 boiler horsepower
Weights and Volume 1 gal. (U. S.) 1 British or Imperial gallon 1 cu. ft. 1 cu. ft. water at 60 deg. fahr. ,, 1 cu. ft. water at 212 deg. fahr. 1 gal. water at 60 deg. fahr. 1 gal. water at 212 deg. fahr. 1 pound (avoir.) 1 bushel 1 short ton 1 long ton
= 199.038 B.t.u. per minute (approx.) = 143.33 B.t.u. per pound. _ f 777.5 ft. lb. = 0.293 watt hours. -- \ 252.02 mean calories. = 2,655.4 ft. lb. = 3.415 B.t.u. _ / 1.3405 horsepower = 56.89 B.t.u. per minute -- \ 44,236.5 ft. lb. per minute. = .0.746 kilowatt _ / 42.44 B.t.u. per minute.
\ 33,000 ft. Ib. per minute. f 33,523.7 B.t.u. per hour or evaporation of = \ 34.5 lb. of water per hour from and at ( 212 deg. fahr.
= 231 cu. in. = 0.13368 cu. ft. = 277.274 cu. in. = 7.4805 gali = 1,728 cu. in. = 62.37 lb. = 59:76 lb. = 8.34 lb. = 7.99 lb. = 16 oz. = 7,000 grains. = 1.244 cu. ft. = 2,000 lb. = 2,240 lb.
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