Foundation for Rolling Aircraft Hangar Doors
Foundation for Rolling Aircraft Hangar Doors
(OP)
In the preliminary stages for the design of a PEMB aircraft hangar. Hangar door will be of the rolling type supported by rails at the base. Door height is approximately 40 feet. Wind speed is 90 mph.
How is the bottom horizontal reaction from the door typically handled? Is it usually assumed that the slab-on-grade resists this force? I am uncomfortable with this approach.
Is the prefered approach to design a foundation wall under the slab supporting the hangar door for stability against overturning and sliding from the horizontal door reaction?
How is the bottom horizontal reaction from the door typically handled? Is it usually assumed that the slab-on-grade resists this force? I am uncomfortable with this approach.
Is the prefered approach to design a foundation wall under the slab supporting the hangar door for stability against overturning and sliding from the horizontal door reaction?






RE: Foundation for Rolling Aircraft Hangar Doors
Dik
RE: Foundation for Rolling Aircraft Hangar Doors
RE: Foundation for Rolling Aircraft Hangar Doors
RE: Foundation for Rolling Aircraft Hangar Doors
RE: Foundation for Rolling Aircraft Hangar Doors
Assuming 20 psf wind load with a 40' tall door, my bottom reaction is 400 plf. Assuming a 4'-6" distance from fin foor to bottom of footing, my overturning moment is 1800 lb-ft/per foot. A 4' wide strip footing with a minimum of 3' of soil on the footing would give me a resisting moment of 4200 lb-ft per foot of resisting moment for a FOS=2.33. If I sharpen my pencil I could probably get to a 3'-6 wide footing.
RE: Foundation for Rolling Aircraft Hangar Doors
RE: Foundation for Rolling Aircraft Hangar Doors
RE: Foundation for Rolling Aircraft Hangar Doors
RE: Foundation for Rolling Aircraft Hangar Doors
Surprised that rolling doors are still being used. These are good. Watch the video.
http://www.megadoor.com/
RE: Foundation for Rolling Aircraft Hangar Doors
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Foundation for Rolling Aircraft Hangar Doors
My door is actually only 30' tall now. If I assume a 12"x48"wide thickened slab to support the rails with a 12" foundation wall, I can make a 2'-6"x1'-0" footing work (preliminary calcs). This is with a guessed at 25 psf suction load. I am considering the building as partially enclosed.
I have to have a foundation at 48" below grade for frost protection anyway, so I might as well take advantage of the foundation wall and footing.
Wall footings for low buildings around here are typically 2'wide by 12" thick, so my estimated footing is only slightly larger than what we use as a minimum.
As the project moves forward I will coordinate with whatever door mfr that we are going to use as the basis of design for any specific requirements they might have.
Thanks everyone for your replies, and Merry Christmas.
RE: Foundation for Rolling Aircraft Hangar Doors
RE: Foundation for Rolling Aircraft Hangar Doors
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com