Strongback

Strongback

[strawng-bahrk, strong-]
A strongback is a beam or girder which acts as a secondary support member to existing structure. A strongback in a staircase is usually ordinary two-by dimensional lumber attached to the staircase stringers to stiffen the assembly. In shipbuilding, a strongback is oriented lengthwise along a ship to brace across several frames in the case of hull damage.

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