Question

when a framed partition butts against a masonry wall, why is a 1 x 2 furring strip applied at the point of intersection? to level the surface to allow for expansion to prevent cracking of the gypsum board to provide a nailing surface for the gypsum board

Explanation:

A 1x2 furring strip at the intersection helps to bridge the unevenness between the framed partition and the masonry wall. This prevents stress - induced cracking in the gypsum board due to uneven surfaces.

Answer:

to prevent cracking of the gypsum board