Operation 1 D D E E E E 2 1 E D D D 3 D E E D F F F1 1. Unfold two Corner panels (E), then insert the ends of a Lintel (D) into the corner panels (E),attach the Lintel (D) to the Corner panel (E) with Connector (F) and Bolt (F1). Repeat the procedure for the remaining corner panels (E) and Lintels (D). Note: The hole of the crossbeam (D) inside.
