EASY COOPS Chicken Coop Plan 8x15 Assembly Instructions Manual page 11

STEP 8
Assemble The Roof Frame
8.1 Use 1 1/2 " x 3 1/2 " material to create six rafters for coop.
8.2 Use 1 1/2 " x 3 1/2 " material to create collar tie for coop .
8.3 Use 3/4 " x 5 1/2 " material to create the ridge board.
8.4 Connect the beams with 2x3" wood screws and assemble the roof frame.