Document RJwN6XojzQKZ9g3G6VrX0kVe8
of" andAmerican Society
Heating
Ventilating Engineers Guide, lgyP
Table 6. Coefficients of Transmission (CO of Frame Interior Walls and Partitions
Coefficients ere expressed in Btu per hour per soucre foot t>er deert* PnhrtnhsU
__
TYPICAL CONSTRUCTION ^PLA/TER. ^rtot/
Type of Wall Wood Lath and Plaster
On Studding Metal Lath and Plaster*
Oa Studding Plaster Board (H in-) and
Plaster* On Studding K in. Rigid Insulation and
Piaster* On Studding 1 in. Rigid Insulation and
Plaster* On Studding 1H in. Corkboard and
Plaster* On Studding 2 in. Corkboard and
Plaster* On Studding
___ DOUBLE PARTITION
(Finished on Bora Sides op Studding)
SlNQLB
Wall No.
Partition
(Finish
on Ons
Air
Side op
Studding) Between
Studding
Flaked Gj Between Studding
Rock Wool Fill*
Between Studding
B^riNe
Insulation
Between
Studding (One Air
Bright Aluminum * Foil
Space)
0.62 0.34
0.11
0.065 0.21
0.69 0.39 0.11
0.066 0.23
0.61 0.34
0.10
0.065 0.21
0.35 0.18
0.0S3 0.056 0.14
0.23 0.12
0.066 0.048 0.097
58 0.16 0.081 0.052 0.040 0.070
0.12 0.063 0.045 0.035 0.057
0.24 0.2Q 0.24 0.15 0.10 0.073 0.059
ComputeR from factor* marked by * in Table 2. -Plaster o^Tl lath assumed ^-in.TST
Thickness assumed 3H in.
`Plaster assumed M-in. thick.
Table 7. Coefficients of Transmission (U) of Masonry Partitions
TYPICAL CONSTRUCTION
tAWOttVf}
_
I
|
\
No.
Plain Walls (No Plaster)
Walls
Plastered on One Sms '
Walls on Both Sides
Type of Wall 4-in. Hollow Clay Tile 4-in. Common Brick 4-in. Hollow Gypsum Tile 2-in. Solid Plaster
A 60 0.45 61 0.50 62 0.30 63 .......
B 0.42 0.46 0.28
"c
0.40
0;43
0.27 )
0.53
I
118
Q^rrm 5--Heat Transmission Coefficients and Tables
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Thickness assumed to be % in. . * Based on one a ir space w ith no flooring, and two a ir spaces w ith flooring. The value of U w ill be the same if insulation is applied to under side of joists and
separated from lath and plaster ceiling by 1-in. furring strips. A ir space faced on one side w ith bright aluminum foil.