Replies

1. 
   GHR | Mar 10, 2003 12:50am | #1

   The new joists need to meet the support requirements of the code usually 1-1/2 min bearing.

   The nailing needs to be sufficient to transfer the full load to the other joist. (In general 16d nails will carry about 100#. Most joists carry 66#/ft so 16" nail spacing works out.)

1. 
   JohnSprung | Mar 11, 2003 03:31am | #2

   Here it's two rows of 16d nails, one near each edge of the joist, 16" OC but staggered so you have a top edge nail, then 8" horizontally along the joist to a bottom edge nail, etc.

   I glued mine together with yellow wood glue, it makes absolutely sure there won't be squeaks between the sisters in the future.

   1 1/2" bearing may be acceptable in many cases, but for long spans it's worth doing the math to see how many psi you're putting on that area. 

   -- J.S.

1. 
   GHR | Mar 11, 2003 04:41am | #3

   I think the question was what an inspector looks for.

   What I stated was what I as an inspector would accept. In all cases it is sufficient. I.E. The nails are sufficient to transfer the total load from one member to the other. The bearing is sufficient for dimensional lumber loaded to failure.

   Now you are free to follow the perscriptive code. You are free to use glue if you wish. You can even bolt the whole thing together. But I am not going to require a structure to be overbuilt.

   I got the room built. How do I get outside?