1. The Nails.
Joist hangers are a great way to attach joists to girders, beams, or ledger boards. All that is required is the correct size hanger and proper nails. Joist hanger manufacturers make it really simple by describing the kinds of the nails to use, and providing a hole where each nail is needed. Despite the ease of installation, we still see contractors forget the nails. I suppose its better than when they forget the hangers, but when home owners pay the bill, they are typically expecting that something as important as the nails wasn’t forgotten.