STEP 11: Attach Roof Top Borders 1 (part I3) to the long edge of the Roof and Roof Top Borders 2 (part I4) to the
short edge of the roof.
Attach the Corner Rib Brace (part K2) as shown in the diagram.
STEP 12: Attach the Roof Top Cover (part J1) to the Roof Top Brace (part J)
K2× 4