Prefabricated wood I-Joist
Prefabricated wood I-Joist
(OP)
what is the "proper" way to determine the shear/flexural/axial capacity of prefabricated wood I-Joists per NDS? When dealing with these sorts of members is the only way to determing their capacity based on manufacturer data or could there be a way to calc them based on NDS? I see there is a chapter dedicated to them in NDS but cannot determine if it is at all useful...






RE: Prefabricated wood I-Joist
1) If you had test data, there are established procedures for converting that to design capacities. Of course, getting the test data from the manufacturer would be orders of magnitude more difficult that just getting their design tables.
2) One could certainly make a reasonable estimate using the flange axial capacities for flexure and the web material in shear. The hang up in an accurate assessment is mostly the glued joint I believe. Probably not a huge deal for uniform loads but, potentially a deal breaker for serious point loads and any loads that might be suspended from the bottom flange etc.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Prefabricated wood I-Joist
RE: Prefabricated wood I-Joist