Patent ID: 6662516
Filing Date: 2003-12-16
Classification: E04B,E04G

Abstract:
A method or strengthening a double wall structure having first and second spaced apart wall portions with a cavity therebetween wherein at least one of the wall portions is a preexisting wall, the method comprising:providing a camera to provide a visual image of the interior of the cavity; providing a light source to illuminate the interior of the cavity; forming a layer of a foamable, adhesive material in the cavity wherein the amount of adhesive material in the layer is such that the expansion force of the adhesive material does not exceed the lateral strength of the first and second wall portions; curing the layer of adhesive material; forming at least one addition layer of adhesive material on top of the previously formed layer of adhesive material after the previously formed layer has cured, the height of the additional layer being substantially the same as the previously formed layer after expansion; and repeating the act of forming the additional layer until the cavity is filled with layers of adhesive material bonding together the wall portions such that the strength of the preexisting wall is increased to more effectively resist lateral and vibration induced loads.