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Re: Electrical wiring routing

Posted By: Roger
Saturday, 15 July 2000, at 6:38 p.m.

In Response To: Electrical wiring routing (Mike Filiatrault)

Mike ---------If you drill a hole in the center of a joist (from edge to edge) you do not affect the strength of the beam very much. But, if you notch the top edge (compression side ) or the bottom edge (tension side), you may greatly decrease the load carrying capacity of the beam. Plus, by storing material and plywood on the beams, you are increasing the load.

My suggestion would be to build up the joists by nailing 1x2s or 2x2s to the top edge of them and then placing the plywood on top of these strips. Use 6d or 8d nails for 1x2s and 12d or 16d for the 2x2s. Dry wall screws would also work. Good luck, Roger

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