EASY COOPS Chicken Coop Plan 8x10 Assembly Instructions Manual page 4

STEP 1
Framing the Coop's Floor
1.1 Assemble the frame using 1 1/2" x 7 1/4" pressure-treated lumber.
You will need seven boards cut to 7'-6 1/4" that will be the joist.
1.2 Secure the beams with 8x3" wood screws.
1.3 Using a speed square or carpenter's square, check the corners to make sure they are 90°.