These free-standing racks hold both lumber and sheet goods
without tying into your shop structure. Being modular,
they’ll hold whatever lengths of lumber you commonly use,
with the center section accommodating full-sized sheet goods.
Each 6'-high × 2'-wide module includes a 71/2"-wide space in
the center for 4 × 8' (or longer) panels. Two modules placed 2'
apart positions an arm every two feet with only a foot of overhang
at each end, which is plenty support to keep boards from
sagging. (A strip of plywood placed across a set of arms creates
a shelf for short offcuts.) You can store lumber on both sides of
the rack; even if one side is placed against a wall, you can still
slide long boards in and out from the end. Two modules fully
loaded with 8'-long boards will hold more than 1,500 board
feet of lumber. Lag screws in the feet allow for perfect leveling.
The hardwood plywood arms extend 121/4", although you
could make them longer. They’re terrifically strong when glued
and screwed to their posts, which I made from 6/4 poplar. If
you decide to use construction 2 × 4s for the posts, make sure
they’re straight and dry, or your racks may tweak out of shape,
as an early set of mine did