How to Build a DIY Screen House | Family Handyman
Fasten the notched upright posts (B) to the outer foundation beams (A) with 1/2-in. x 5-in. galvanized lag screws and washers. Be sure to plumb and brace the posts as you drill a 3/8-in. pilot hole for each lag screw. Photo 3: Install the joists. Install the joists at each end first, then string a line between them.