How to Limit Site Access

Fixed Height Restrictors are a simple way of limiting access onto a site, presenting a clear and unavoidable barrier to high-sided vehicles, without affecting other road users. Effective and ever popular, properly installing Fixed Height Restrictors is vital. Our experienced Installation Team have been sharing their tips on installing this access control staple. Q. How do I install a Fixed Height Restrictor? A. Fixed Height Restrictors must always be installed onto a level surface. How, depends on the type of height restrictor you are installing. Ragged: Ragged versions require casting into fresh concrete of at least 600mm3 per leg. Top Tip: For ragged installations install the first leg independently, ensuring it is straight and supported as the concrete cures. Once fully set, attach the boom to the second leg and install as one piece, using the first leg as a guide. Flanged: Flanged versions require bolting to a level concrete surface of at least 600mm3 per leg using 16mm anchor bolts. Whichever type you are installing, always make sure that the height restrictor is level and square once installed. Q. Where can Fixed Height Restrictors be installed? A. Single Fixed Height Restrictors can be installed over any entrance up to seven metres wide onto a level concrete base. Q. What if I’m securing an entrance over seven metres wide? A. Double Fixed Height Restrictors are available to cover wider entrances. Double lane versions have the same installation needs as the single lane but with an additional boom and leg. Q. Can I install a Fixed Height Restrictor alone? A. Fixed Height Restrictors are large and heavy. They always require at least two people using lifting equipment to install. Don’t forget to wear appropriate PPE at all times! Q. What optional extras are available? A. Optional knocking bars and height warning signs are available for the Fixed Height Restrictor. Knocking Bars: These are hung from eyelets on the underside of the boom using the chains provided. By using lesser or greater lengths of chain you can hang a knocking bar higher or lower as needed. Always make sure they are parallel to the road surface once installed. Height Warning Signs: These signs simply require securely bolting to the appropriate face of the boom.

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