Screw the Framework Together Use all-purpose screws (4-inch lag screws and 1-5/8 inch screws) to secure the 1Ă—8 back rim and 1Ă—2 front rim to the 2Ă—8 support block. Space the support blocks every 32 in. Step 3

Screw the Framework Together Use all-purpose screws (4-inch lag screws and 1-5/8 inch screws) to secure the 1Ă—8 back rim and 1Ă—2 front rim to the 2Ă—8 support block. Space the support blocks every 32 in. Step 3