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HEATING VENTILATING AIR CONDITIONING CUIDE 1941
(U)Table 4. Coefficients of Transmission
of Masonry Walls
with Various Types of Veneers*
Coefficients are 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 15 mph.
TYPICAL CONSTRUCTION
TYPE OF WALL
Facing
Backing
Wall No.
4 in. Brick Veneer*
6 in. ioiS:HoUowTUe*
12 in.
37'
38 39 40
4 in. Brick Veneer*
6 in.
10 in. Concrete 16 in.
41 42 43
4 in. Brick Veneer*
8 in. Cinder Blocks 8 in. Cinder Blocks -- Cores 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. Burned Clay aggregate Block 8 in. Burned Clay aggregate Block--Cores filled with gran ulated cork, 5.06 lb per cu ft. 12 in. Burned Clay aggregate Block 12 in. Burned Clay aggregate Blocks--Cores filled with gran ulated cork, 5.6 lb per cu ft.
44
45 46
47 48
49 50 51
52 53
54
4 in. Cut-Stone Veneer*
8 in. 12 in. Common Brick 16 in.
55
56 57
4 in. Cut-Stone Veneer*
6 in.
. !n- Hollow Tile* iu in. 12 in.
58 59
60 61
4 in. Cut-Stone Veneer*
6 in. 10 in. Concrete
16 in.
62 63 64
^Computed from factors marked by * in Table 2. 6 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 beat flow.
tile is based on three cells in the direction of heat flow.
The 12-in.
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CHAPTER 3. HEAT TRANSMISSION COEFFICIENTS AND TABLES
INTERIOR FINISH
Uninsulated Walls
Insulates Walls
Plaster on wood 1 lath--furred
Plaster (H in.) on
metal lath--furred No plaster--deco rated rigid or build ing board interior
finish (H in.)--
furred
Plaster (H in.) on
metal lath attached to fumog strips (2 In.*)--rock wool
fill (1H in.*)/
5
oa . a x
gx
3 Oc '----' 25
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?lf~.s
ij
0 ao
35|-
3ll xl?
a!
3 If
0-mS
|5T 3 3^
E'cLS
Hi fal
B.-C.9 ft.c.2 sss3
0.0*2 0,
ABCD E
F
GH
I
J
Sl-lijs. .-- ciis
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iisUn
KL
0.36 0.34 0.34 0.27
0.34 0.33 0.32
0.26
0.24 0.24 0.23 0.20
0.25 0.25 Q.24 0.21
0.24 0.24 0.23
0.20
0.19 0.19 0.19 0.16
0.19 0.15 0.18 0.14 0.18 0.14
0.16 0.13
0.13 0.12 0.12
0.11
0.18 0.18 0.18
0.16
0.11 0.11 0.11
0.10
0.17 0.17 0.17 0.15
0.57
0.48 0.39
0.37
0.33
0.30 0.26
0.35
0.31 0.27
0.33 0.30
0.26
0.24 0.22 0.20
0.23 0.17 0.14 0.22 0.16 0.14 0.19 0.15 0.13
0.35 0.33 0.24 0.25 0.24 0.19 0.18 0.14 0.12
0.19 0.16 0.16 0.16 0^31 0.30 0.22 0.23 0.22
0.13 0.18
0.13 0.11 0.10 0.17 0.14 0.12
0.I8J 0.18 0.15 0.15 0.15 0.44 0.42 0.28 0.30 0.28
0.13 0.21
0.12 0.10 0.09 0.21 0.16 0.13
0.34 0.32 0.24 0.25 0.23 0.40 0.38 0.26 0.28 0.26 0.31 0.29 0.23 0.23 0.22
0.19 0.20
0.18
o;i8 0.14 0.20 0.15
0.17 0.14
0.12 0.13
0.12
0.17 0.16 0.14 0.14 0.14 0.29 0.28 0.21 0.22 0.21
0.12 0.17
0.12 0.10 0.09 0.17 0.13 0.12
0.14 Q.14 0.12 0.12 0.12 0.10 0.10 0.09 0.08
0.37 0.35 0.25 0.26 0.25 0.28 0.27 0.21 0.21 0.21 0.23 0.22 .0.18 0.18 0.18
0.19
0.17 0.15
0.19 0.15 0.16 0.13 0.14 0.12
0.13 0.12
0.11
0.23 0.22 0.20
0.18
0.13 0.17
0.13 0.21
0.18 0.20 0.17
0.12 0.17
0.10.
0.19 0.17. 0.15
0.13 0.12 0.11
0.11
0.09 0.11
0.08 0.12
0.11 0.11 0.11
0.08 0.10
0.07
0.11 0.10 0.095
0.21 0.20 0.18
0.17
0.12 0.16
0.12 0.19
0.17 0.18 0.16
0.11 0.16
0.10
0.17 0.15 0.14
0.37 0.35 0.25 0.26 0.25 0.36 0.34 0.24 0.25 0.24 0.35 0.33 0.24 0.25 0.24
0.28 0.26 0.20 0.21 0.20
0.20 0.19 0.19 0.17
0.19 0.15 0.19 0.15 0.18 0.14 0.16 0.13
0.13 0.13 0.12
0.11
0.19 0.18 0.18
0.17
0.11 0.11
0.11 0.10
0.18 0.17 . 0.17 0.15
0.61 0.56 0.34 0.36 0.34 0.51 0.47 0.31 0.32 0.31 0.41 0.38 0.26 0.28 0.26
0.25
0.23 0.20
0.24 0.18 0.15
0.22 0.17 0.14 0.20 0.15 0.13
0.24
0.22 0.20
0.13
0.12 0.11
0.22 0.20 0.18
^Calculations include cement mortar (H in.) between veneer or facing and backing. Based on one air cell in direction of heat flow.
fA waterproof (not vaporproof) membrane should be provided between the outer material and the
insulation fill to prevent possible wetting by absorption and a subsequent lowering of efficiency.
87