Cold Formed Steel Ledger Connection @ Loft Infill/Platform
Cold Formed Steel Ledger Connection @ Loft Infill/Platform
(OP)
I am designing a new cold formed steel loft to be constructed within the confines of existing wood stud walls, so I have a ledger condition along the perimeter. I am sure this has been tackled before using CFS, but I am having a tough time quickly finding a typical approach to this detail. My concern with using a CFS member as the ledger lies in the local effects (warping, fastener tearing/pullout, etc). If forced into CFS ledgers, I personally would gain some comfort by doubling up the ledger member and drive the fasteners through the nested webs, possibly adding stiffeners/some connection to tie the top & bot flanges. Any CFS experts out there?
On the attached sketches, I prefer approach #2 for both the "joist perpendicular" and "joist parallel conditions" (biggest driver is my limited experience using CFS and preference toward wood). I'll be dumping approximately 400# at the joist perpendicular connection. Is it so crazy to have a CFS contractor cut a few wood ledgers? Seems reasonable to me.
Our office has limited experience with CFS, so, I welcome any input/feedback - thanks in advance!
On the attached sketches, I prefer approach #2 for both the "joist perpendicular" and "joist parallel conditions" (biggest driver is my limited experience using CFS and preference toward wood). I'll be dumping approximately 400# at the joist perpendicular connection. Is it so crazy to have a CFS contractor cut a few wood ledgers? Seems reasonable to me.
Our office has limited experience with CFS, so, I welcome any input/feedback - thanks in advance!






RE: Cold Formed Steel Ledger Connection @ Loft Infill/Platform
RE: Cold Formed Steel Ledger Connection @ Loft Infill/Platform
My gut sense is that you want option #1, single ply, no flange to flange stiffeners. It looks conventional and reduces eccentricity. I feel your pain though. Hybrid connections are always a pain.
I'm going to mentally summon XR250 to your thread for you... now! He's a wiz at this stuff as he does specialty work in CFM.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Cold Formed Steel Ledger Connection @ Loft Infill/Platform
RE: Cold Formed Steel Ledger Connection @ Loft Infill/Platform
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Cold Formed Steel Ledger Connection @ Loft Infill/Platform
RE: Cold Formed Steel Ledger Connection @ Loft Infill/Platform
RE: Cold Formed Steel Ledger Connection @ Loft Infill/Platform
What is the joist span, design loads and are the joists intended to brace the walls?
RE: Cold Formed Steel Ledger Connection @ Loft Infill/Platform
XR - thanks. I am leaning toward modifying my approach to choice 1 for joists perp by doing something similar to what KootK suggested, i.e.: use a typical track ledger and avoid eccentricity that the Simpson SJC is imposing. Any opinion on that?
RE: Cold Formed Steel Ledger Connection @ Loft Infill/Platform