Ha! I put in that workbench when we bought the house. It's 16' long if I remember correctly and the base is all 4X6s. It's rock-solid, but for good or bad, I followed the "level" of the floor so the workbench top is not level. OTOH, if I had built it to be level, one end of it would be thigh-level. smile
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::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::