The VGSN 500 N1/W1 series of steel parapets are modular in design and consist of three, four or five horizontal rail sections located to supporting posts at heights ranging from one metre (standard) up to 1.8 metres.

Rails can be pulled to a radius of 75 metres on site, without the need and cost of specialised curving and accommodate a vertical alignment of +/- 4 degrees without modifications.

Constructed from high grade steel and galvanised to ISO 1461 to provide a corrosion resistant system, the VGSN 500 was tested on a 450mm edge beam to demonstrate that the systems perform on actual bridge dimensions.