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I was told by a rep. from richco (I joist mfg.) that it is not acceptable to tie roof rafters into the “I” joists, does anyone know anything about this subject, and why it is not acceptable?
Thanks,
keith
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Replies
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just a guess- the web of an I-joist does not seem to be designed with tension in mind. The outward thrust of a rafter might be too much and tear out the web...
don't see why you couldn't barefoot the rafter or nail it to a cleat on top of the joists though- if that works for your application...
*I-joists can't be in compression like a conventional rafter - they have to have a ridge beam to support the high end of them. Maybe that's what your rep was talking about.
*Hi,Engineered floor joists are designed to withstand loading from above or live and dead loads. Most wood joists, weather man made or by mother nature, are at their best when installed in such a way as to not torque.There are ways to attach to a joist by blocking the cavity first and then adding a plate to the side that you are going to attach to. It also requires that you transfer any lateral loading to a wall.Onsite modifications will sometimes negate the factory warrantees, so beware.Gabe