It's easy to understand the concept of cross bracing if we think of how wobbly a frame can be on its own. After all, a frame is mostly hollow space. Metal is sturdy, yet because there are such long lengths of it in larger scaffolds, an unsteady frame that wiggles too easily can result. If another metal piece is attached between two of the frame's bars, less wiggling will occur. Anyone who has ever assembled furniture sold flat packed with diagonal braces included probably has a good idea of how strong cross bracing can make otherwise rickety structures.
Outside uprights go on the opposite side from the inside gstbymlb uprights and are secured in place with nails. Diagonal braces should be added to the outside uprights for extra support before placing more walking planks on top of the second level of ledger boards. Ledger boards should be used to connect the inside and outside uprights. Walking planks are placed on top of the ledger boards, and more ribbon and ledger boards are nailed at a second walking level.
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