1. If I just calculate a Dead Load from scratch (truss, felt, shingles, soffit, fascia, etc.) for the roof structure, I get a number on the order of 7 psf. Ok. 2. I'm not sure what the basis should be for the Live Load. My initial assumptions are that there is no snow/ice load, no access/storage to the attic, that wind load is more directed at an upward lift of the structure, possibly some load from workers on the roof, and possibly some load from rain in a very heavy storm. I must be missing something (or a calculation error). Even if I assume a 1/2" of rain water on the roof, I get loads less than 5 psf. So, what am I missing and/or why would the Live Load required be so large (in fact, it always seems to be much larger than the Dead Load for the tables I see - even for southern Louisiana)?