The silver Aluminum Alloy Rail T5 19.7' (6m) from ARRI is designed for curtain and cyclorama systems. You can achieve any length and shape of rail systems by connecting 2 or more of these standard rails. For this, end stops are required at each rail end.
The spacing of rail brackets depends on the maximum load on the rail itself, but should not exceed 6.5’ (2m). Again, the distance from a rail bracket to the rail end should not exceed 1.6’ (0.5m). These brackets are required at all rail junctions and in the middle of curved rails.