strongback

listen to the pronunciation of strongback
İngilizce - İngilizce
The fore-and-aft spar extending from stem to stern on a lifeboat and serving as a raised spreader for a boat cover. (FM 55-501)
A strong bar placed across a hatch opening to hold hatch boards or hatch covers. (FM 55-501)
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
A strong bar placed across a hatch opening to hold hatch boards or hatch covers
The fore-and-aft spar extending from stem to stern on a lifeboat and serving as a raised spreader for a boat cover