This one isn’t polycarbonate, it’s all aluminum and supports up to 400lbs. Doubt it will but If it ever does cave I’ll make an insurance claim.
I have a Bakflip with racks. Supports 400# and I can walk on it . Live in Chicago, so ice is a concern. Last winter was mild, so didn't get to really test it. Made two wood boxes to slide inside for the parts and tools I need.