What size, type, and grade of lumber would I need to use as joists to support wire decking used for pallet racks over an 11-foot overhead span?
42D" x 46W" wire decks supporting up to 2,500 lbs. are commonly available
online. This is industrial-strength wire decking but my intended use would be general purpose overhead garage storage so I'm not looking for 5,000 lbs. per span. 1,000 lbs. would be nice, if possible.
According to one manufacturer, their wire decks can be supported by a 1.5 inch wide beam, so 2x lumber would be a fit. My plan would be to use 2 46" wide decks over each 11' span, so each set of decking would be supported by 2 joists 42 inches apart connected to wood beams (ledger boards) anchored to the cement block side walls.
The garage is 11' wide, so shorter or longer spans are out. Steel pallet beams are out as an 11' span is not a standard size (not to mention mounting considerations).
I'm turning to this forum in desperation. After hours of searching online it seems that I am the only person in the world to come up with this idea. The only links returned by search engines only seem to be ones that want to sell you something.
I see a number of span/sag calculators online but none seem to fit these parameters.
I might be getting the hang of this. It apears that the design of the racking transfers the load direcly onto the beams.
According to the SFPA tables, a #1 2x6 over a 12 ft. span could support a total load of 41 lbs./lineal foot with L/240 sag. Interpolate for an 11 foot span and you wind up with ~50 lbs./lineal ft.
Double that because the weight would be distributed between two joists and you wind up with ~100 lbs./ft., suggesting that a 1,000 lb. load is practical. Would probably have to derate for commodity lumber grade.
Probably still qualifies as an experiment though.