Garage Guide

Do ceiling joists in a garage need to be strenghtened to support overhead storage?

Gable roof with 2x8 rafters 16" oc. 2x10 ceiling joists 16" oc, 24' span. I want to nail 5/8" plywood down on top of ceiling joists to store christmas decorations, kids toys, large bulky items. Roof pitch is 5/12 so usable storage is limited to midspan of 2x10.

Public Comments

  1. probably depends on the weight of what ever it is. just set it on top of the beams and in in between.
  2. Should be ok for storing light items...brace the floor to the rafters in the center every 8 feet or so...diagonals from the ceiling joists to the rafters every 4 feet, roughly a 1/4 of the distance out from the walls... support columns, beam or wall in the center would be better. Your proposed setup is exactly what my garage has except I have more usuable space/different pitch and have had no problems in 30 years even with heavy items. 2 X 10 ceiling joists are hardly marginal and prevent the walls from bowing outwards. Snow load on the roof is moderate in Wisconsin winters.
  3. You can do that as long as your only storing light loads. I take it your covering the 2 x 10 with plywood.
  4. You didn't mention if you attic has diagonal bracing. If so, 10 lbs per SF is not a problem.
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