Roller Doors wind locks 1

[rowingengineer]

A number of my buildings are having larger span folded roller doors with wind locks installed. This create a large tension force under wind loads, generally 10 times the load wind load on the door. Thus far I have been designing individual portal frames to go around the doors for strength as the roller door jambs and header. As I get quite large torsion, and inplane forces.

The problems I am having with this method is that the detailing required is quite erroneous and I am wondering if there is a better way.

1. for these large inplane forces from the door, has anyone looked at allowing the member to rotate in torsion and relieve this force on the jambs?
2. for the large inplane forces has anyone allowed the jambs to deflect significant amounts to allow hte roller door to fdeflect more and reduce the membrane forces? this would to relive the inplane force on the jamb?

http://www.nceng.com.au/

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning."

 

[rowingengineer]

a local door supplier - you can download the flyer to see the type of door I am discussing.

http://www.bnd.com.au/products/residential-doors/roller-garage-doors/wind-locked-roll-a-door

http://www.nceng.com.au/

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning."

 

[dhengr]

RE:
The way they expect that door system will work will make those in-plane forces pretty high, and they put a heck of a burden on us to design for it. As their pictures show, many times you only have a foot or two of wall at each jamb on a garage. So the normal shear wall isn’t much good, and your portal frame may be the only answer. Can you strap the jamb back into the wall beyond? Either with 2" x 4' nailing straps on a plywood sheathed stud wall; or some reinforcing/ties at each horiz. joint in a masonry wall, to take some of that in-plane load out of the jamb and back into the shear wall. There are also several pre-manufactured jambs which get bolted down to a significant foundation for this garage door/short shear wall condition. Look at “Steel Strong-Wall Panels,” by Simpson Strong-Tie, and a few others. Could you incorporate these to make your jamb stiffer, in-plane?

 

[rowingengineer]

Dhengr,
Thanks for the ideas, I do like the strapping idea for timber and masonry, seems to be getting some better results. I also like the steel strong panels, haven't seen them in Australia before, so am going to have to do some digging.

http://www.nceng.com.au/

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning."