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alloy checkerplate with a lot of bolts
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https://www.grimco.com/Catalog/Products/MAXmetal
Aluminum skins on HDPE plastic. Two different skin thicknesses, .15mm or .21mm, about like a beer can. Sheet sizes up to 5x10ft. Competitive products are Polymetal and Aluma-panel. Here are tests I did shearing, braking and rolling samples of Polymetal by hand:
The white stripe is an H-channel joining two pieces. Braking cracked the outer skin. I had less success trying to dimple it for recessed fastener heads.