A. Measure distance between posts, subtracting 1/4in. from total length for backet compensation.
B. Measure both top and bottom rails to ensure both are the same length before cutting.
D. The rail brackets are designed to allow for up to 1in. of extension beyond end of rails on each side for a total of 2in.
E. Screw self tapping screw in both sides of bracket into the rail.