Document GzKQ0xyV2DNQbao3xEGnbQ1yv
American Society of Heating and Ventilating Engineers Guide, 1932
)Table 16. Coefficients of Transmission (U of 4-in. Cut Stone
Veneer on Concrete Walls
Note.--These coefficients are expressed in Btu -per hour per square foot per 1 dbg fahr
DIFFERENCE IN TEMPERATURE BETWEEN THE AIR ON THE TWO SIDES AND ARE BASED ON AN OUTSIDE WIND
EXPOSURE OF 15 BOLES PER HOUR.
'
"Thevaluesof U inthi3Tablearebased onthefollowinq
InternalConductivities or Conductances which are
expressedin B.t u. per Hr per Sq.Ft. per \*F
Stone
,,
Concrete (Stone hZ:4 mix.)
Cement Mortar
'000 perl]
&30per!_
8.00 per 1*
Plasterboard
3.73 per^
Plaster (Gypsum)
Wood Lath * Plaster
I.VL perl-
ZjOO as applied
Cork board
0.30 perl_
RiqidInsulation(Boardfarm)
CellularGi/psum (18*) ,, flaked Gypsum, Dry (24^
0.33 perl
0.51 peri;
0.48 perl
Y= Thickness of Insulation where specified L 1! Interior 1 Construction
z
Y
0
` 'V
s . I . .* `
. o -__^
^CT^'Cement * Mortar
Thickness of Concrete --X
<b* 8" lO` 12' 16'
A B c D E.
1 Plain Walls -.No Interior Finish
0.451 0.413 0.377 0.345 0216
z Plasteron Concrete
3 % Placer on Metal La\h - furred
0.418 a 380 0.348 0321 0.271 0.215 0.274 0257 0242 QZI7
4 Plaster on WoodLath -- Purred
0.271 0.261 0.246 0.252 0.201
5
i Plaster on S' Plaster board- Furred Xo
0.280 0.262 0.247 O.Z53 0201
a
6
^ Plaster on Wood LatVi on 2. Purrmcj Strips --Cellular Gypsum Fill b
>1" 0.184
0.176
0.161
0.163 0151
4 Plasteron Wood Latb on 2. Purrinq
7 Strips -- Flaked GypsumFill
a
' 0.164 0.158 0.152 0.147 0.137
8 X Placer on .iqid Insulation --
(Boardform) Furred 1
1" 2
0.208
0.118
0.188
0180 0166
r 0.158 0.152 0.147 0.142 0.133
10 4Plasteron Corkboard set iniCement Mortar
ll
lz" 0.134 0.130 0.126 0.122 QII6
t 0.110 0.107 0.104 0.102 0017
Based on 1H in*, the actual thickness of 2 in. furring strips. bThe coefficient used for, cellular gypsum. 0.69 is for 18 lb. weight--weights as low as 12 lb. may be used.
48
Chapter 3--Heat Transfer Through Materials and Constructions
Table 17. Coefficients of Transmission (U) of Concrete Walls with Stucco as Exterior Finish
Note.--These coefficients are expressed in Btu per hour per square foot per i 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.
Thevaluescf Uin this Table are basedon thefoUowioq
Internal Conductivities or Conductances which are expressed, in E>.t.u.perWr. per Sq.Ft. pec l"F
Stucco Concrete (Stone b2-4 moc) , Plasterboard.
8.00 per-1" 8.30 perl* 3.73 per^*
Plaster (Gypsum)
4Wood Lath Raster
2.32 perl* 2.00 asapplied
Corkboard
0.30 perl*
Riqid Insulation (Boardform)0.33 perl"
Cellular Gypsum (18*) Flaked Gypsum, Dry (24*)
0.54 perl* 0.48 per 1"
V- Thickness of Insulation where specified
w $ Interior I Construction
z
Y
x--
* *A * * O'
,'
0
0 *'
,: & *
I" Stucco*-- on Wire Mesh
t> * .___^
Thickness of Concrete -- X.
<0 8* IO" 12" 16' ZO` A B cDE F
1 Plain Walls - Mo Interior Finish
0.544 0.481 0.431 0.311 0.327 0.Z84
2. ^Plasteron Concrete
0.486 0.437 0.315 0.361 0308 0.268
3 qr Plasteron Metal Lath - Furred 4 T PlasteronVJcxxiLath -- purred
0.3Z6 0302 0.282 0.264 0.234 0210 0.308 0287 0^268 0252 0.225 0203
5 j Plasteron PI aster board-furred % Plasteron Wood Lath or? 2." Furrma
(0 Stnps-Cellular Gypsum Fill
0.310 0.288 0.270 0.253 0226 0.204 a
0.116 0.188 0.171 0.172 0.151 0.148
1
z Pldstferon WoodLathon 2." Furrmq . Stnps -- FlakedGypsum Fill
a if* 0.173 0.167 0.161 0.154 0.144 0135
8
1* a PlasberohRiqid Insulation
(Boardforwi) Furred
1
10 5: Rasteror? Corkboard set in-^ Cement M ortar
II
i 0.223 0.212 0.202 0.112 0.176 0.163
r 3.167 0.160 0.154 0.141 0.151 0.130
0.141 0.136 0.132 0.127 0.120 0.114
2" 3.114 0.111 0.108 0.105 o.ioo 0016
Based on in., the actual thickness of 2 in. furring strips.bThe coefficient used for cellular gypsum. 0.59 is for 18 lb. weight--weights as low as 12 lb. may be used.
49