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Table A107.1(4)—Default U-factors for steel garage and hangar doors.

Table A107.1(4)
Default U-factors for Steel Garage and Hangar Doors
Double-skin Steel Garage and Aircraft Hangar Doors
 
One-piece tilt-upa
Sectional tilt-upb
Aircraft hangar
Insulatione
8 ft. x 7 ft.
16 ft. x 7 ft.
9 ft. x 7 ft.
72 ft. x 12 ft.c
240 ft. x 50 ft.d
1-3/8 in. thickness
XPS, steel ribs
EPS, steel ribs
0.36
0.33
0.33
0.31
0.34 - 0.39
0.31 - 0.36
 
 
2 in. thickness
XPS, steel ribs
EPS, steel ribs
0.31
0.29
0.28
0.26
0.29 - 0.33
0.27 - 0.31
 
 
3 in. thickness
XPS, steel ribs
EPS, steel ribs
0.26
0.24
0.23
0.21
0.25 - 0.28
0.24 - 0.27
 
 
4 in. thickness
XPS, steel ribs
EPS, steel ribs
0.23
0.21
0.20
0.19
0.23 - 0.25
0.21 - 0.24
 
 
6 in. thickness
XPS, steel ribs
EPS, steel ribs
0.20
0.19
0.16
0.15
0.20 - 0.21
0.19 - 0.21
 
 
4 in. thickness
Noninsulated
Expanded polystyrene
Mineral wool, steel ribs
Extruded polystyrene
 
 
 
1.10
0.25
0.25
0.23
1.23
0.16
0.16
0.15
6 in. thickness
Noninsulated
Expanded polystyrene
Mineral wool, steel ribs
Extruded polystyrene
 
 
 
1.10
0.21
0.23
0.20
1.23
0.13
0.13
0.12
Uninsulated
All products
1.15
 
 
 
 
a
Values are for thermally broken or thermally unbroken doors.
b
Lower values are for thermally broken doors; upper values are for doors with no thermal break.
c
Typical size for a small private airplane (single-engine or twin).
d
Typical hangar door for a midsize commercial jet airliner.
e
XPS is extruded polystyrene, EPS is expanded polystyrene.
[Statutory Authority: RCW 19.27A.025, 19.27A.045, 19.27.020, and 19.27.074. WSR 14-24-122, § 51-11C-610714, filed 12/3/14, effective 1/3/15. Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. WSR 13-04-056, § 51-11C-610714, filed 2/1/13, effective 7/1/13.]
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