Raising Roof on Existing Wood frame building
Raising Roof on Existing Wood frame building
(OP)
We have a client looking at using an existing 50 ft x 215 ft wood building as an assembly shop. The walls are 2x6 @ 16" and the roof are trusses @2' o/c. The current eave height is approx. 12'. The client would like to raise the eave to 24'.
A quick check of the code says he needs 2x10 walls minimum.
So a couple questions :
Can the wall be stepped, i.e. 2x10 to 12' and 2x6 above?
The code considers the wall studs pinned at each end. Can tie anchors such as the Simpsons products be used to provide a fixed end conditions for design purposes?
Can the same type of Simpson products be used to provide a moment connection at a stud splice?
I have my own opinions on these but a searching for some other perspectives.
thanks
A quick check of the code says he needs 2x10 walls minimum.
So a couple questions :
Can the wall be stepped, i.e. 2x10 to 12' and 2x6 above?
The code considers the wall studs pinned at each end. Can tie anchors such as the Simpsons products be used to provide a fixed end conditions for design purposes?
Can the same type of Simpson products be used to provide a moment connection at a stud splice?
I have my own opinions on these but a searching for some other perspectives.
thanks






RE: Raising Roof on Existing Wood frame building
RE: Raising Roof on Existing Wood frame building
Also, I know of no effective way of introducing a moment type connection into the base of the wall with Simpson connectors. You can reduce the overall unbraced length of the studs by introducing knee braces at the top of the wall.
RE: Raising Roof on Existing Wood frame building
Just what i expected to hear. But I had to check these off my list of ideas.
RE: Raising Roof on Existing Wood frame building
You can't get a complete moment connection at the base, so I usually use (wl^2)/9 to compute moment due to wind lateral loading.