RAM Connection Bolted Brace Limit State

RE: RAM Connection Bolted Brace Limit State

TLiebhold — Fri, 07 Oct 2022 20:52:45 GMT

Ah- I see. Now it’s just the question of where K is coming from.

RE: RAM Connection Bolted Brace Limit State

Seth Guthrie — Fri, 07 Oct 2022 20:32:06 GMT

Not air, but the total length of the clamped-together plates like figure 5-5.

RE: RAM Connection Bolted Brace Limit State

TLiebhold — Fri, 07 Oct 2022 19:57:33 GMT

Odd - so it's counting air in the buckling length? That doesn't seem right - I'd contend that the buckling lengths would be the portion of the gusset free from restraint - either the average on the centerline (A) or more conservatively the longer free edge (B):

RE: RAM Connection Bolted Brace Limit State

Seth Guthrie — Fri, 07 Oct 2022 19:47:33 GMT

I think it's the combined length, something like this:

RE: RAM Connection Bolted Brace Limit State

TLiebhold — Fri, 07 Oct 2022 19:40:12 GMT

Ok - in the configuration i sent the thru plate is 24" long, and I can't find a 26.7" dimension anywhere:

RE: RAM Connection Bolted Brace Limit State

Seth Guthrie — Fri, 07 Oct 2022 19:23:05 GMT

The important instructions here come from Design Guide 24 Section 5.2. Here's a clip:

In reviewing your example, I still have a question about the K factor used, but making it larger as noted in the DG will only make your situation worse.