Headroom required, calculation and frame for industrial garage door
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Headroom required by type of lift
Type of movement
|
Commercial hardware
(2", 50 mm)
|
Industrial hardware
(3", 76 mm)
|
Low headroom
front mount
|
- 8" (203 mm) for doors up to 12 ft (3.7 m) high
- 10" (254 mm) for doors over 12 ft (3.7 m) high
|
13" (33 cm) |
Low headroom
rear mount
|
4 in. (10.2 cm) |
11" (28 cm) |
Standard lift
|
- 12" (305 mm) for doors up to 12 ft (3.7 m) high
- 13.5" (343 mm) for doors over 12 ft (3.7 m) high
|
16" (41 cm) |
High lift
|
Total space above the door minus 10 " (25 cm) |
Total space above the door minus 10" (25 cm) |
Full vertical
|
Twice the height of the door + 9" (23 cm) |
Twice the height of the door + 9" (23 cm) |
Inclined
|
According to the slope of the roof |
According to the slope of the roof |
View all types of lift in picutres
Door frame
Calculation to determine the headroom required for an overhead crane
Bridge struts for large size doors
Headroom calculation:
(Please refer to drawing below)
- Measure the distance between floor and ceiling = H
ex.: 14 ft. or 4270 mm
- Measure the door opening = h
ex.: 12 ft. or 3658 mm
- Substract 2 from 1
1 - 2 = Available headroom
- The result (H-h) is greater then 406 mm
- The result (H-h) is less then 406 mm
P.S.: Option
Low headroom hardware allows you to have very little headroom : between 4" (102 mm) and 11" (279 mm). Contact Garaga for more information
*These construction specifications and shop drawings are applicable to GARAGA Inc. products only.