In reviewing keyp's PDF, I'm wondering if the analysis started out with a nailed solution, then changed to a bolted solution at the bottom: 12 fastners vs 4. The spliced length for the top drawing is 2.5', not 3' as shown near the bottom (unless you increased the length of the wood splice...
What is the reference for 5% as tolerable?
For the wood truss industry, the Truss Plate Institute specifies 2% as maximum vertical lean and L/200 for bow (as in the photo) where L = length of truss in inches.
Er, wouldn't L/200 = 0.5%???
The old source doc was HIB-91, but I can't recall new...
It's been a long while since I checked this site, partly because someone stole my office computer. Anyways...
To DTGT2002, I don't recall recommending anyone use the Simpson catalog indiscriminately. If you were truly concerned, I'd expect you'd refer someone to the ICBO Evaluation Reports for...
Not too long ago, I saw a reference on this site to a treatise on using slabs on grade in bearing, or the bearing ability of slabs on grade. Apparently, someone did a special study on this and published their results?
Anyhow, the situation being when an interior, non-bearing partition is...
dba
Except for bugle head drywall (and similarly made) screws, I'm wondering how properly sized metal can fail before wood. Doesn't shear value of the steel exceed forces resisted by the gussets?
In any case, Simpson produces a 1/4" lag screw that is self tapping and clearing that...
It seems to me your testing is showing you that your design is not adequate, either in spans or sizes of members. Adding continuous lateral bracing will reduce lateral buckling, as will adding members onto the buckling ones in a "T" fashion.
You can add more members (and joints) to...
sgc:
You are not listening. There is NO SEAT OF THE PANTS MODIFICATION.
Your architect is giving you BAD ADVICE. If licensed, he/she should be disciplined by your state licensing board.
You need to listen to TRUSSDOC and the TWO truss manufacters (Hmm, you'd think they might know something...
Ahh, excellent. I'm in (former) ICBO land, but will search out the SBCCI and BOCA refs. I tried theother day, and then again today, and couldn't get teh APA pdf to open or download. May have to buy it. :-( Ha!
Thanks again, v/r
John
Thanks, and understood.
When splits/checks pass through centerline of the beam, eg, over 1/2 its width, the beam begins to behave like two stacked beams, and performance is degraded, so that is one parameter. I like to have source docs in what I do since there is always someone who wants to...
What references to use, and how does one go about determining if checks in timbers are "substantial" as alluded in the Timber Design Manual.
The situation I've seen recently is a nominal 8x14, 16 foot long residential garage door header with splits on one side about 2 1/2 deep...
This is likely too late now. But....
A large splice plate with another 2x member underneath the gap is a good idea. Jacking up the ridge and adding a collar tie is an adequate temporary approach, but the collar tie is not useful against moments developed between the rafters and tie for the...
