Sheet Goods Dolly?
Have immense oak table to move this summer; 1.75" thick x 5' wide x 14' long, estimate upwards of 300 lbs.
I better make [U]two[U] of these Bricoleando dollies.

Originally it hinged on a cinder block wall, a pair of legs swung down in front. Held upright with king-size latch, very gate-like. May as well hang it same way, though not envisioning clearing off to raise it, unless needing extra 70 sq ft of maneuvering space.