Rainbow Industrial Estate Station Approach Off Grand Drive Raynes Park SW20 0JY

A box-frame is a four section structure designed to support a building by transferring the load through the columns to the ground beam and foundations, allowing a simple solution for removal of a bearing wall. Consisting of a ground beam, two columns, and a top beam joined together with welded plates and bolted connections a box-frame, or picture frame, is commonplace in extensions, and basement conversions.

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