I modelled the dolly in 3D to help. Measurements are shown in both metric and imperial for Stateside builders
Cutting list - all 2"x2"/50x50mm 16g Box steel unless specified:
Bracketed colour key relates to diagram. You get all the elements you need from two 6m lengths (standard supplied length for 50x50 box section steel).
You'll also need four ML384-1 swivel & brake castors from Machine Mart or similar. They're polypropylene wheels with a plate size of 79.4 x 104.7 and can withstand a 102kg load (per wheel). Order code is 051320095 and they're 4.69 each.
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