Elevation of rail at conveyor "Load" and "Unload" points is determined by the type of carrier hook, and the connivance of handling the part. Sometimes elevation of rail is determined by headroom under chain, required when operators must pass under conveyor.

Rail elevation should be shown from floor to top of I-beam track.

The height of rail between "Load" and "Unload" points depends on such factors as ceiling heights, truss height, clearance height under part being carried, obstructions, aisles, etc. Guards from conveyors add to clearance requirements.