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Re: Joist support
Francis,
In my opinion, the bearing part meets the IRC 03 code requirement of:
502.6 Bearing.
The ends of each joist, beam or girder shall have not less than 1.5 inches (38 mm) of bearing on wood or metal and not less than 3 inches (76 mm) on masonry or concrete except where supported on a 1-inch-by-4-inch (25.4 mm by 102 mm) ribbon strip and nailed to the adjacent stud or by the use of approved joist hangers.
Since that appears to be a 4" x 4" member which means 3.5" X 3.5" nominal, then half of that would be 1.75" which it appears to be. So that part would be OK.
The real question is, what is the size of the lag bolt and it's sheer strength? Also what is the dead load of that floor?
I would say that one bolt would be a little lite. It may be adequate for the load it is supporting but I would like to see a minimum of two.
I think this is a question that need more engineering info to answer.
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