Not Ranked
OK it's a 2 x 10-thought it was two boards from the photo. Rethinking, I wouldn't use wood screws to attach. Through bolting with 4" hex bolts and nylocks would be best.
Best to have effort like you do to move it-I would NOT want 1 finger to push 2600#'s around on a smooth floor.
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Chas.
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