I am looking to hang a shelf from the ceiling of my garage between two garage doors. The shelf is 32" x 94" and made from a frame of 2x4 and 3/4 plywood on top. I've tried to weigh it and I think it weighs approx. 63lbs. One end of the shelf can be directly screwed into the stud of the garage wall. The other end (and another mid way) would be screwed to the ceiling joist using 4 2x4 screwed into the shelf and then into the ceiling. I was thinking of using L brackets with lag bolts to fix the shelf to the ceiling. I was planning on using #8 3" wood screws to attach the 2x4 that will hang the shelf. Am I way off or will this hold?
The ceiling joists I am attaching to are 2x4 on end that span approx. 6-7'. They are notched at the ends where both ends sit on the bottom sill of I beams. The I beams span the width of the garage (approx. 23') and sit on a stack of 5 2x4 standing on end. Thank you for your input.
It is possible to get above the I beams but it would entail taking down drywall and then replacing. I was hoping for the shelf to support approx. 250-300 lbs total.