Document YDe03254andGQKQwVjodmkGq0
Plaster (H in-) onwalla j
Plaster on wood lath--furred Plaster in.) on rigid insulation (1 in.)--furred Plasteronmetal lath (Jtf in.) attached to furring strips--furred space (over
^in. wide) faced one side with
bright aluminumfoil Plaster(% in.) onmetal lath attached to furring strips (2 in.*)--rock wool fill (1H in.*)/ Plaster in.) onmetal lath attached
to furring( strips} i (2 in.*)--flexible
insulation in.) between furring strips (oneair space)
American Society of Heating and Ventilating Engineers Guide, 1936
Table 4. Coefficients of Transmission (V) of Masonry Walls with Various Types of Veneers
Coefficients are expressed in Btn per hour Per square foot per degree
Fahrenheit difference in temperature between and are based on a wind velocity of IS mph.
the
air
on
the
two
sides*
TYPIPat CONSTRUCTION
TYPE OF WALL
Facing
Backing
WinNa:
4 in. Brick Veneer* 4 in. Brick Veneer*
6 in. 10 in HoUow Tile12 in!
6 in. 10 in. Concrete 16 in.
21 j3
22 23 c
;___ Heat Transmission Coefficients and Tables
interior finish
Uninsulated Walls
Insulated Walls
1*ta8
.O
21 13
aS3
J93
a
S
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0e
7 3 I
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ABCD E F G H I
J
0.36 0.34 0.34 0.27
0.34 0.26
o!2o
(L25 0.25 0.24 0.21
0.24 0.24 0.23 0.20
0.19 0.19 0.19 0.16
0.19 0.18 0.18 0.16
0.16 0.14 0.14 0.13
0.13 0.12 0.12 0.11
0.19 0.19 0.19 0.16
KL 0.11 0.17 0.11 0.17 0.11 0.17 0.10 0.15
0*18 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 0.22 0.19
0.17 0.16 0.15
0.14 0.14 0.13
0.24 0.22 0.20
0.13 0.21 0.12 0.20 0.11 0.18
4 in. Brick Veneer* 4 in. Brick Veneer*
if jJJ; Cinder Blocks12 in! Cncrete Blocks-
4 in. Cut-Stone Veneer*
8 in. 12 in. Common Brick 16 in.
0.31
0.33 0.30
0.24 0.22
0.25 0.24 0.23 . 0.22
0.19 0.18
0.18 0.17
0.14 0.14
0.12 0.12
. 0.42 0.40 0.38
0.28 . 0.30 0.26 0.28
0.28 0.26
0.21 0.20
0.21 0.20
0.16 0.15
0.13 0.13
o;i9 0.18 0.21 0.20
0.11 0.17 0.11 0.16 0.12 0.19 0.11 0.18
i
31 i 32 33 *
0.37 0.28 0.23
0.35 0.27 0.22
0.25 0.21 0.18
0.26 0.25 0.21 0.21 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
0.19 ` 0.17 0:15
O.U 0.17 0.10 0.15 0.095 0.14
4 in. Cut-Stone Veneer*
6 in. 10 In! Hollow Tile*
12 in.
4 in. Cut-Stone Veneer*
6 in. 10 in. Concrete 16 in.
u 35
3376 i% i
33 39
4
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. The 12-in? tile is based on three cells in the direction of heat flow.
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0.37 0.35 0.25 0.26 0.25 0.20 0.19 0.15 0.13 0.20
0.36 0.34 0.35 0.33
0.24 0.24
0.25 0.25
0.24 0.24
0.19 0.19
0.19 0.15 0.18 0.14
0.13 0.12
0.19 0.19
0.28 0.26 0.20 0.21 0.20 0.17 0.16 0.13 o.u 0.17
O.U 0.18 0.11 0.17 0.11 0.17 0.10 0.15
0.61 0.51 0.41
0.56 0.47 0.38
0.34 0.31 0.26
0.36 0.32 0.28
0.34 0.31 0.26
0.25 0.23 0.20
0.24 0.22 0.20
0.18 0.17 0.15
0.15 0,14 0.13
0.25 0.23 0.21
0.13 0.22 0.12 0.20 o.n 0.18
^Calculations include cement mortar (H in.) between veneer or fadng and backing.
.........-
/aaw ou one air cell in direction of hmt flow.
-
'A waterproof membrane should be provided between the outer material and the insulation fill to
prevent possible wetting by absorption and a subsequent lowering of efficiency.
115