Beams are the horizontal pieces, they connect directly to the uprights. Beams distribute the weight, and are designed to hold several thousand pounds to several tons, PER SHELF! (with proper weight capacities and beam placement). Typical beams range in widths: 96", 99", 102", 108", 120", 144"
Beam price list (it takes 2 beams to make 1 shelf):
96" long $17.50 ea
108"long $22.00 ea
120"long $31.00 ea
144"long $35.00 ea
Wire grid deck vs. wood decking (MDF)
Wire grid meets and/or exceeds local fire and building codes:
48"D X 46"W $10.00 ea
48"D X 58"W $13.00 ea
48"D X 69"W $16.00 ea
36"D X 48"W $10.00 ea
MDF Wood shelf: General utility shelf (comes complete with center supports)
Price $15.00 per shelf 48"X 96"