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I have run into a new roof joist for which I can't seem to find any data. Circa 1953, school in Detroit. I did not visit the site, but this is a photo from the contractor. The lattice shape is like that of Kalmantruss, but it is not formed from one piece of steel, with T's for top & bottom...

I am trying to help a fabrictor deicpher a german fabrication drawing, circa 1999. It a platform for a steel induction furnace, sheet metal/ tube steel. I can't determine what is meant on some of the weld symbols. Does anyone have expereience with European weld symbols, or know where I could...

Any suggested details for anchoring a 1 hour, 8" cmu wall to the flange of precast double tee roof? Non-bearing wall, running parallel to the T's. I'd like to use double slotted angles attached to the underside of the precast, but not sure how this works with the fire rating. Architect shows...

Thanks for the imput. This particualar rail is near grade, so I'm letting it go, but hope to come up with a better calculation to support in the future.

I've been doing stair & railing calcs lately (yeehaw) & need to know how to calculate the embedment depth required for the steel posts in concrete slabs. Often it's a thin concrete floor slab, 4" or so. I've looked at PCI Design Handbook EQ 6.9.1, but I don't know if this is applicable to an...

I need to design two 4 hour cmu firewalls (due to building area separation req'mts)for a four story, wood framed, assisted living building in Florida. Per FBC, a firewall must have "sufficient structural stability under fire conditions to allow collapse of the construction on either side...