The simple guardrail GS4 is a generic product of the French state. GS4 has constituted the base of the lateral restraint systems on the French roads for more than 40 years.

Characteristics

GS4 is made up of a profile A rail, spacers and C100 posts spaced every 4 meters.

The impact made the posts bend, be detached from rails, and the guardrail forms a pocket. The vehicle is then redirectes by the rail wich plays the part of a belt.

A removable version of GS4 described in NF P98-410 standards exists, as well as a range of accessories : terminals, transitions.

Performance

The simple guardrail GS4 is a generic product of the French state related level N2, according to the EN 1317-2 standards. However, GS4 does not completely fulfill the criteria of the European standards because spacers of 3,2 kg are ejected during the crash-tests. Indeed, the European standards, in its version of 2005, does not tolerate the ejection of objects of more than 2 kg.

The simple guardrail GS4 is approved by the n°88-49 ministerial circular of May 9, 1988.

Containment level : related N2

Working width : W6 (1,86m)

ASI : A

Installation, durability and maintenance

Concerning the installation of simple guardrail GS4, it is advisable to refer to the n°88-49 circular of approval of May 9,1988.