Attach Cross Supports for Roof
Cut four 5’-3” lengths of 2x4. Use your square to mark a horizontal line 12” down from the top of the 2x4 x 5’ riser boards. Take one 5’-3” piece and pre-drill a hole in the very center of the face of the board (center top to bottom, and center left to right); place a screw in the hole. Hold up this cross piece perpendicular to the 5’ riser board, and line the bottom of the 5’-3” board up with the line you just drew, and screw it to the exact center (left to right) of the 2 x4 x 5’ riser board. You should be able to swivel the cross piece, so use your framing square to make sure the 5’-3” cross piece is perpendicular to the riser, and then pre-drill and screw four more screws into the face of the cross piece.