Welding Table Frame

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I need to span about 100" x 48" between legs, for a 5/8" plate around 1,200 lbs.Why does nobody seem to use pallet racking for the horizontal frame components?  For example 13 gauge 2.5" x 5" or 6" tube with a step.  From what I've seen, some beams are designed with max deflection of length/180, but diagonal braces could be added to support the top beam 24" or 36" in from the legs, with a lower runner between the legs to prevent outward bow.
Reply:I use some of that stuff. Works good and can be really cost effective if you can buy it right. Sometimes a PITA to deal with the step, sometimes works well also.
Reply:I use it and a I am getting ready to rebuild my table with it when shrink my shop next month.  Make sure you use structural.  Use new beams as well since there be deflection/sag with used beams. Iirc 1" per 8' Is acceptable deflection.Idealarc 250AC 225SVictor OA-older made in USA stuff.And a crap ton of other stuff.
Reply:Originally Posted by kaldMake sure you use structural.  Use new beams as well since there be deflection/sag with used beams. Iirc 1" per 8' Is acceptable deflection.
Reply:Originally Posted by AmericanWelderI need to span about 100" x 48" between legs, for a 5/8" plate around 1,200 lbs.Why does nobody seem to use pallet racking for the horizontal frame components?  For example 13 gauge 2.5" x 5" or 6" tube with a step.  From what I've seen, some beams are designed with max deflection of length/180, but diagonal braces could be added to support the top beam 24" or 36" in from the legs, with a lower runner between the legs to prevent outward bow.
Reply:Originally Posted by docwelderi was in sears a few weeks ago and saw a pallet rack used as a display and got the same idea to use some for a welding/work bench. where would you purchase it?