Welded construction with 1-5/16" OD tubular dividers on a base of square tubing and angle iron that includes lag down holes and keeps stored materials up off the floor. Storage bays (4 total) are 7" wide with 1500 lbs. capacity each. Upright dividers are 27", 36", and 42" high. Frame and uprights are all welded and coated in a durable gray powder coat for long lasting performance.