These shelving units can be for multipurpose use Free standing unit includes 2 4’x8’ upright frames 4 horizontal beams Beam sizes 8’, 10’, 12’ Free standing unit with each beam size 8’ $310 10’ $330 12’ $350 Add ons to extend shelving which includes 1 upright frame and 4 beams 8’ $235 10’ $ 255 12’ $ 275 Wire shelf racks also available for some units 43 1/2’’ x 45 1/2’’ $25 each 38’’ x 47’’ $20 each Many units available in each size.