EASY COOPS Chicken Coop Plan 8x10 Assembly Instructions Manual page 14

STEP 11
Assemble The Roost
11.1 Assemble the roost using 1 1/2" x 2 1/2" pressure-treated material.
You will need four boards cut to 7-1" and two boards cut to 5'-3".
11.2 Connect the beams with 2" wood screws.
11.3 Install the roost at the studs with the help of 3" screws.