wood frame building large door
wood frame building large door
(OP)
Attached is a sketch for a 60’ x 120’ x 18’ wood structure on a pile/grade beam foundation and slab-on-grade. The client requires a 40 x 16 door in the end for access for wide machinery. Any Ideas on a design concept? Maybe we would be looking at a steel portal frame or could a glulam timber design be feasible. The lateral wind load would be taken by the roof diaphragm and the foundation with some sort of connection.






RE: wood frame building large door
Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.
RE: wood frame building large door
The client is planning to use a bi-fold door. I don't know yet how the door is attached to the truss or the foundation below. I have no experience with such large doors in a frame wall. I was assuming that the lateral wind load on the door (25 psf) would be shared in some fashion between the tuss and the foundation The lateral load on the shear wall would be framed into the roof which is sheeted with plywood. I don't know what you meant by attaching the shear walls with a beam.
RE: wood frame building large door
BA
RE: wood frame building large door
Dik
RE: wood frame building large door
Adding a 40 ft. wide door would be tough unless you use a ceiling diaphragm.
RE: wood frame building large door
Dik
RE: wood frame building large door
BA
RE: wood frame building large door
Dik
RE: wood frame building large door
RE: wood frame building large door
Dik
RE: wood frame building large door
BA
RE: wood frame building large door
RE: wood frame building large door
BA
RE: wood frame building large door
Just like BA does it. But, last night I was looking at the stars and in the constellation Rittziopia the stars were aligned just right to indicate that Rittz needs some ideas and help. So here I are.
I am not sure how this would work, but by working with the truss supplier, could you do the following? Two vertical trusses, 10' wide and 16' high. This gable end truss would have its bottom chord at 16' elev. (the door head), so it would also have 2' high heels out at the eaves. This certainly would be a crazy rigid frame truss system, might be osb or plywd. sheathed both sides. It doesn’t have much roof load on it, but must interact with the roof diaphragm, and take wind loads perpendicular to its plane, as well as those from the whole bldg. which end up in its plane, plus the door loads. It would require pretty husky chord members in both the vert. truss and the gable truss at the door jamb lines. And, it would require some sort of hold down hardware out at the 2' deep heels, 18' long hold down rods from the found. to the top chord.
Alternatively, make the two vert. trusses 10' wide, and 18' high at the eves and about 20.5' high at the door jamb line. The jamb chord on these vert. trusses would have 2 or 3-2x6s (or whatever) cut short at 16' elev. to act as a bearing seat for the door header/gable truss which would be 40' long, btwn. these two vert. truss bearing seats. At the roof plane, you might use steel strapping for continuity btwn. the trusses at the door jamb line; or you might hold the top/sloped chords down, 2 or 3(1.5") so you can install these 2 or 3 added, laminated, top chord members for continuity.
Thicken and reinforce the edges of your approach (apron) slabs. Also, form a nice radius on its two outer corners, or the first time they drive a combine or tractor in there, they will break (crack) a 2 or 3' by 45̊ corner off those aprons.
RE: wood frame building large door
Regards,
John, Peng age 83
RE: wood frame building large door