Patent ID: 7658878

Claim:
A method of reinforcing an existing metal structure comprising the steps of: providing a reinforcing metal layer on said metal structure in spaced apart relation to thereby form at least one cavity between inner surfaces of said metal structure and said reinforcing metal layer; injecting an intermediate layer comprised of an uncured plastics or polymer material into said at least one cavity; curing said plastics or polymer material so that it adheres to said inner surfaces of said metal structure and said reinforcing metal layer; and during said injection and curing steps constraining said reinforcing metal layer by at least one restraint member and holding said at least one restraint member to said existing metal structure by at least one magnetic clamp; wherein said at least one magnetic clamp is to be placed on said existing structure and connected to a bridging member in a medial position such that said bridging member can bear on two restraint members on either side of the magnet unit.