Jerry: Indeed. Just wanted to make sure there wasn't a structural reason for less screws. The 10" brackets can accommodate 5 screws.
Dodged a bullet this week re: plywood the garage roof has apparently developed 3 leaks - right over where I was storing the wood. Thankfully most of the water hit the cutout "scrap" pieces & while water had absorbed there is no major delamination. Only trouble spot I see on the actual shelf wood is about a 3/4" spot of bubbling way back in a corner out of view. Got all pieces vertically stored & the tops covered w/some old plastic, just in case.
- Neal