A friend has a deck made of Trex (or some similar brand) and it's disintegrating. Needs to be completely rebuilt. The stuff doesn't hold up outdoors. Might be O

A friend has a deck made of Trex (or some similar brand) and it's disintegrating. Needs to be completely rebuilt. The stuff doesn't hold up outdoors. Might be OK for structural framing that is kept dry under a roof and inside walls, if it compares to similar sized wood lumber in terms of strength in both shear and compression.