Mounting frame for ganged electrical devices

A frame for mounting a plurality of adjacent electrical devices into a switchbox which is mounted into a wall, said wall having a non-planar surface relative to said switchbox, said frame comprising, in combination:

• (a) a substantially rectangular first plate formed of a rigid material, said first plate having a front surface, a back surface which abuts against said wall, and a substantially rectangular opening, said first plate further comprising a plurality of holes in said first plate, positioned to permit alignment with holes in said switchbox;
• (b) a flange extending substantially normal to said first plate at an outer edge of said plate;
• and
• (c) a strengthening bracket, comprising a substantially rectangular second plate, for placement against a surface of said first plate, said second plate having
• (i) a substantially rectangular opening and
• (ii) a plurality of holes positioned to permit alignment with said holes in said first plate
• whereby said frame effectively changes said non-planar surface of said wall to a planar mounting surface.