When using dimensional lumber for floor joists, what are the best practices for blocking?
Solid blocking at the point of lapped joists over girders or ponies? Yes?
Is midspan blocking needed if no load bearing walls are supported by the span?
What spacing for blocking between joists to support non-load bearing wall above?
Anyone use cross bracing? It seems cutting solid blocks is a bit of a pain? I know one could try it both ways, but someone out there has does this a hundred times and has a conculsion. And, oh yeah, my engineer and suppliers have no opinions on the subject.
Any other thought on blocking?
Replies
Take a look at section 502.2 of the IRC, which is
available here: http://publicecodes.cyberregs.com/icod/irc/2012/icod_irc_2012_5_sec002.htm. Note that the requirements may vary according to your local jurisdiction.
I prefer solid blocking because I think it's faster to install and is a good way to use off-cuts and some culls. I've never used the manufactured cross-bracing, which is probably even faster to install.
Best blocking practices all depend on whether or not the ref is looking
With a length stop on a miter saw and consistently layed out joists I have never thought of blocking as a hassle or difficult to do.
With properly sized joists blocking requirements are rather minimal.