Patent ID: 6510661
Filing Date: 2003-01-28
Classification: E06B

Abstract:
A back-up shear plate for metal window frames having different sized frame mouth openings of X and Y dimensions, each frame having an elongated hollow body with inwardly disposed wall elements, front and rear wall elements and outer wall elements, said inwardly disposed wall elements forming an inwardly facing U-shaped channel adapted to retain a window pane therein, said outer wall elements forming an outwardly facing frame mouth with first and second opposing wall segments on either side of said outwardly facing frame mouth, different window frames having correspondingly different sized X or Y outwardly facing frame mouth openings, the back-up shear plate comprising:a laterally disposed rectangular base plate having two sets of opposed sides adapted to be tightly interfit in a respective frame mouth of one of said different window frames having different frame mouth openings, said base plate having laterally disposed first and second lockable, opposite outer edge members defining slots adapted to be interlockable on corresponding opposing outer wall elements which define said respective frame mouth of X or Y dimension of said respective different window frames having different frame mouth openings; said base plate being arranged such that the distance between slots on one set of opposed sides of the base plate is greater than the distance between slots on the other set of opposed sides for engaging with the outer elements defining a corresponding frame mouth of X or Y dimension of said respective different window frames.