Document mbBDXEaEwNMvOB1QvprzL4nJ4
American Society of Heating and Ventilating Engineers Guide, 1932
Table 24. Coefficients of Transmission (U) of Brick Veneer Frame Walls
. Arote.--These coefficients are expressed in Btu per hour per square foot per 1 deg fahr DIFFERENCE IN TEMPERATURE BETWEEN THE AIR ON THE TWO SIDES AND ARE BASED ON AN OUTSIDE WIND EXPOSURE OP 15 MILES PER HOUR.
TVie values of U in this Table are basedon thefollowinq
Internal Conductivities or Conductances which are.
expressed m b.tu.per Ur. per Sq.ft, per t# F
Wood (Yellow Rneor Fir)
1.00 pert]
Plaster (Gypsum)
2.32 per F
Plaster board 3.73 per J 2.&0 per^
Cork board
0.30 per l"
Wood Lath 4 Plaster
2.00 asapplled
Rtqid Insulation (Boardform) 0.33 perl]
flexible Insulation
0.27 perl
Cellular Gypsum/IB*)
0. M per I
Flaked Gypsum (24*) Brick.
0.4B per l S.00 per ).
Typical Construction
^Sheathinq
4"BnckN
_O$oJ-
Tv/peor
6 3
Sheatbinq
2
Insulation between Studdmq
2*x4':
^"Cement Mortar-
Wood Lath
A
Plaster Base
Metal Lath
Plastter
i B-iqid Insula
I'Biqid Insuia-
|lLX"- . Cork
2" Cork.
board tion -tioh board board
B C D E F. G
1 L rwoodb 3 4
Mone
0.247 0.258 0.248 0.18*1 0.147 QI14 Q087
Flaked Gypsum fill (24*) a
aim
0.045
0.0*14
0.084
0.075
0.065
0.058
Cellular Gypsum FiU(l&*)tt-c
0.108
a 110
0.108
0.015 a
0.083
0.072 a064
Flexible Insulation
0.147 0.150 0.147 0.125 0.105 0.087 0.076
5
Slone
0.20*? 0.217 0.210 0.166 0.133 0.106 0.040
i" Kiaid
6
Insulation (Board form)
Flaked Gi/psum Fill (24*) a
0.087 0.085 0.087 0.074 0071
0.062. 0.056
7
Cellular Gypsum Fill 0*) a"c
0.100
0.102
0.101
0.08*1 0.074 0.068 0.061
8
Flexible Insulation
0.133 0.136 0.133 0.114 0048 0.082 0.072
<1
Hone
0.276 0.1*10 0.277 0.206 0.157 0.120 0.100
10
X Plaster board.
11
;U
Flaked. Gypsum Fill (24*) a 0.088
0.100
0.088 0.087 0.Q77 0.067 0.060
Cellular Gypsum fill (18*) a"c 0.113 0.115 0.113 0.100 0086 0.074 0.066
Flexible. Insulation
0.157 o:i6i 0.157 0.131 0.104 0.010 0074
Thickness of fill assumed
based on 2 in. by 4 in. studding*
bBased on in., the actual thickness of 1 in. or % in. sheathing. Building paper neglected.
. The coefficient used for cellular gypsum, 0.59 is for 18 lb. weight--weights as tow as 12 lb. may be used.
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Chapter 3 Heat. Transfer Through Materials and Constructions
Table 25. Coefficients of Transmission (Z/) of Interior Walls and Partitions
Note.--These coefficients are expressed in Btu per hour per square foot per 1 deg fahr
DIFFERENCE IN TEMPERATURE BETWEEN THE AIR ON THE TWO SIDES AND ARE BASED ON ST ILL-AIR fNO WIND}
CONDITIONS ON BOTH-SIDES.
V'
PLA.STED.ED FRAME PARTITIONS
The values of U in this Table are On one side of based on thefollowwq Internal Studdmq only
Conductivities or Conductances
which are expressed in B.t.u. per
Ur. perSq.Ft. perlF
Plaster (Gypsum) 232. perl"
Plaster board
3.73 per
Wood Lath 4 Plaster 2.00 as
appld
Giqid Insulation (Boardform)
0.33 perl'
. flexible Insulation 0.27 per I"
Cork, board
0.30perl"
Cellular Gypsum (ifiP) 0.51 perl*
Raked Gypsum , Dry (24*)
0.48perf
On both sides of Studdtnq
Insulation
between SVuddinq
Studdmq
Insulation
Gypsum Pill between Studdmq '
Gypsum Pill
^ Riqid
Cellular Plaked
insulation flexible Gypsum Gypsum
(board Insulation Fill
Fill Q
form)
No. Plaster Base Metal Lath b Wood Lath c % Plaster board c -^Riqid Insulation (Boardform) I Riqid Insulation (board form)C
Ik Corkbdard 2 Cork board.
0.551 0.502 0.506 0.310 0.211 0.147 0.117
0.328 0.274 0.277 0.170 0.113 0.078 0.06Z
D
0.183 0.173 am 0.103
0.172 0.162 0.116 0.100 0.17Z 0.163 0.117 0.100 0.121 0.116 0.070 0.080 0.088 0.086 0.071 0064 0.066 0.064 0.055 0.05Z 0.054 0.053 0.047 0.044
Plastered masonry Partitions
The values of U indhisTable are based onihe
followmq Internal Conductivities or
Conductance which are expressed m fe.t.u
per Ur. per Sq. Ft. per FF
HollowClay Tle(4,`)
0.73 per 4*
Brick.
5-00 per 1]
Hollow GypsumTile.
0.4b per 4"
PlatnWalls
(No Plaster')
Walts Plastered Walls Plastered
one side
both sides
"k Gypsum Plaster ""
tl Gypsum Plaster
No. Wall Construction 4 Hollow Clay Tile 4" Brick. 4` Hollow GypsumTile
A: 0.370 0.437 0.173
B. 0.360 0.400
0.258
0.333 .0.367 0.244
4 in^tuddfng np?S ` **" gy?sum 611 is approximately SMInw-tbe approximate 4 in. dimension of 2 in. by
bMetai lath and plaster assumed % in. thick. 'Plaster assumed Vi in. thick.
<*The coefficient used for cellular gypsum. 0.59 is for 18 lb. weight--weights as low as 12 lb. may be used.
57