Swing Height Restrictor BarrierSwing Height Restrictor Barrier Our Swing Height Restrictor has a standard clearance of 2. 05m, limiting access to high sided vehicles and is perfect for use on commercial and industrial sites. The beam can be opened to allow full access when needed and can be locked in the open position if necessary using a second catch post. Manufactured from galvanised mild steel, the body of the height restrictor is coated red as standard (other colours are