Calculate Grid Covers

For Wall Bracket Covers Divide Perimeter by 4

For Mains - Divide Square Feet by 8 for a 2' x 2' area or by 16 for a 2' x 4' area.

For Cross T's - Divide Square Feet by 4 for a 2' x 2' area or by 8 for a 2' x 4' area