Per ASCE 7-10 Chapter 12, it is acceptable to have dual systems for lateral resistance. But is it possible to have a dual system that is not listed in that table? If this was just a steel building only, I could choose "steel system not specifically detailed for seismic resistance". I have a...
I have a situation where I am evaluating the option to use a 3/4" puddle weld on a 36/9 pattern. My question is what kind of, if any, restrictions are there on puddle weld spacing for deck attachment? The deck is 1.5B 18 gauge. When using a 36/9 pattern, the attachment is 'stacked' at the ends...
I was planning on having X braced frames every several trusses to act as sway frames and then linking them together with struts. This is per the recommendation of Design Guide 7 from AISC. However, the roof beams are much more frequent than the sway frames would be and I would be able to use a...
I am working on designing a long span truss. From past experience I have seen most buildings with long span trusses have the roof beams sitting on top of the top chord and bolted into the flange. If I have a W8 chord and am wanting to use the roof beams to brace the chord against buckling for...
