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Heating Ventilating Air Conditioning Guide 1939
Table 4. Coefficients of Transmission (U) of Masonry Walls
with Various Types of Veneers. Coefficients ore expressed in Btu per hour per square foot Per degree Fahrenheit difference in temperature between the air on the two sides, and are based on a wind velocity of 16 mph.
TYPICAL CONSTRUCTION
TYPE OF WALL
Facing
Backing
Wl
Na
4 in. Brick Veneer*
6 in.
8 in. 10 in.
Hollow Tile*
12 in.
37
38 39 49
4 in. Brick Veneer*
6 in.
10 in. Concrete 16 in.
41 43
43. j
4 in. BrickTVeneer*
8 in. Cinder Blocks 8 in. Cinder Blocks -- Corea filled with granulated cork, 5.12 lb per cu ft. 12 in. Cinder Blocks 12 in. Cinder Blocks -- Cores filled with granulated cork, 5.24 lb per cu ft.
8 in. Concrete Blocks 8 in. Concrete Blocks--Cores filled with granulated cork, 5.14 lb per cu ft. 12 in. Concrete Blocks 8 in. Haydite Block 8 in. Haydite Block--Cores filled with granulated cork, 5.06 lb per cu ft. 12 in. Haydite Block 12 in. Haydite Block--Core9 filled with granulated cork, 5.6 lb per cu ft.
44
43 46
47 .48
49 50 51
52- : 53
54.'
4 in. Cut-Stone Veneer*
O IQ.
12 in. Common Brick 16 in.
55 56 57
4 in. Cut-Stone Veneer*
6 in.
8 10
in. in.
Hollow
Tile*
12 in.
4 in. Cut-Stone Veneer*
6 in. 10 in. Concrete 16 in.
Computed from factors marked by * in Table 2. *Based on the actual thickness of 2-in. furring strips. The 6-in., 8-in. and 10-in. tile figures are based on two cells in the direction of heat flow, tile is based on three cells in the direction of beat flow.
The 12-ira
104
Chapter 5. Heat Transmission Coefficients and Tables interior finish
105