Document 154X76Jo2VwjY9811ZxzRJoeX
American Society of- Heating and Ventilating Engineers Guide, 1930
Table 25. Coefficients of Transmission (XX) of Wood Shingle Frame Walls
Note.--These coefficients are expressed in B.t.u. per hour per square foot per l deg. fahr. DIFFERENCE IN TEMPERATURE BETWEEN THE AIR ON THE TWO SIDES AND ARE BASED ON AN OUTSIDE WIND EXPOSURE OF. 15 MILES PER HOUR.
Tli e values of U in this Table are basedonthefollowmc
In temal Conductivities orConductances which are expressedm B.tu. per Hr per Sq.Ft. per PF
\Vbod (Yellow Pineor Fir)
TOO per 1'
"laster (Gypsum)
2.32 per f
Taster board 3.T3 per
2.80 per 4"
('ork board
0.30 per i*
ybod Lath 4 Plaster liqid Insulation (Boardform)
2.00 asapplied
0.33 per 1'
flexible Insulation C ellular Gypsum (18*) FTaked Gypsum (24*)
0.27 per 1"
0.58 per C
048 per {"
Typical Const ructio rv 2`x4' Studs -v.
-- \ 62ood SI iinqles.
|___ /7
|
it f
VSheathir
Number
lr'
Sbealbinq
Insulation between Studdmq
Wood Lath
A
Metal Lath
B
Plaster* &ase
?3" i2."
r
Plaster Rigid Rigid
It Corf-
board tnsulahor Insulation board
c D E 'F
2' Corkboard
G
1
2 l Wood c
3
4
None
0.Z62 0.175 0.263 0.188 0.153 0.(17 0.088
Flaked Gypsum
Fill (24*) a
0.0% 0.098 0.086 0.086 0.076 0.067 0.060
Cel lular Gypsum
fill (is*)
0.1 II 0.113 am 0.097 0.085 0.073 0.065
T Flexible Insulation
0152 0.157 0.153 0.128 0.107 0.089 0.077
5
None
0.183 0.190 0184 0.150 0.122 0.098 0.085
4 C.\qid
tO Insulation
flaked Gypsum
fill (24*) * . 0.083 0.084 0083 0.076 0.068 0.060 0055
(Boardform) b
7
CellularGypsum fill (I8W) --d
0.094
0.085
0.094
0.084
0.075
0.065
0.059
8
flexible Insulation
aiz2 0.125 0.122 0.106 0.091 0.077 0.069.
8 4 Plaster
ip board b
II
17.
None
0.233 0.243 0.234 0.181 0.142 0. Ill 0.084
flaked Gypsum Fill (24*)
Cellular Gypsum Fill (18*)
0.081 0.105
0.093 0.107
0.092 0105
0.083 0.074 0.093 0.081
0:065 0.059 0.070 0.063
z Flexible Insulation'
0.142 0.146 0.142 0.121 0.102 0.085 0.074
Thickness of fill assumed 3% in., based on 2 in. by 4 in. studding. bFurring strips between wood shingles and sheathing. cBased on in., the actual thickness of 1 in. or % in. sheathing. Building paper neglected. dThe coefficient used for cellular gypsum, 0.59 is for IS lb. weight---weights as low as 12 lb. may be use^' v
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Chapter 2--Heat Losses from Buildings
Table 26. Coefficients of Transmission (U) of Stucco Frame Walls
w . ___These coefficients are expressed tn B.t.u. per hour per square foot per 1 deg. fahr. ttRRNCE IN TEMPERATURE BETWEEN THE AIR ON THE TWO SIDES AND ARE BASED ON AN OUTSIDE WIND
SSoSURE OF 15 MlLBS PER HOUR.
Thevalues of U in this Table are based on the following
Internal Conductivities or Conductances which are
expressed in B.t.u. per Hr per Sq.ft, per 1'F
VJbod (Vfellow Pine or Fir)
Plaster (Gypsum)
Plaster board
3 73 per
Cork board Wood Lath (Plaster Ciqid Insulation (Board form)
I1n.0n0 mperl" 2.32 perl" 280 peri 0.30 per 1" 2.00 asapplied
0.33 per f
Flexible insulation
Cellular Gypsum C18**)
Flaked Gypsum (24*)
Brick Stucco
0.27 pert053 per f 0.48 per 1' 5.00 per i'
8.00 per l"
Typical Construction
SheatVnnq v
l Stucco,
2V4'Studs |
U0 Type
_D
or Sheatbmq
2
( 1" Wood b
2 3
4
5 - Rigid
(Board form) 6
7
8
.9 !0
^"Plaster board
II
12
.. -
Insulation between Studding
None
Plaster Base
Wood Metal f
i
'
i-r
Lath Lath Plaster liqtd iwjid Cork-
board mutation ffsulaiioo bajrd
A BcDe F
V Corkbaord
G
0302 0.319 0.304 0.220 0165 0125 0.103
Flaked Gypsum
Fill (24*) a
0101
CellularGypsum Fill (18*) a_c 0.U7
0102 0.101 0.120 0117
0.089 0079 0.068 0.061 0.103 0 089 0.075 0.067
V* flexible Insulation
0.165 0.169 0.165 (3.137 0.113 0.093 0.080
None
0.247 0.259 0.248 0.190 0147 0.114 0.096
Flaked Gypsum Fill (24*) a
0.094
0.095
0.094
0.084
0.075
0.065
0.058
Cellular Gypsum Fill 08*) ac 0.108 0.110
0.108 0.085 0.083 0.072 0.064
flexible Insulation
0.147 0.151 0.147 0.125 0.105 0.087 0.076
None
0.347 0.369 0.349 0.243 0.178 0.131 0.108
Flaked Gypsum Fill (74*)
0105
0.107
0105
0.093 0.081
0.070 0.063
Cellular Gypsum Fill 08*) tt'c 0.123
0.126 0.124 0107
0092 0.078 0.069
flexible.
Insulakion
0.177 0.183 0.178 0.146 0119 0.087 0.083
.Thickness of fill assumed 354 in*, based on 2 in. by 4 in. studding. -
1
l>Based on in., the actual thickness of 1-in. or 74 in. sheathing. Building paper neglected.
cThe coefficient used for cellular gypsum, 0.59 is for 18 lb. weight--weights as low as 12 lb. may be used.
49