Guardrail is an impact absorber of more flexibility compared to concrete blocks. Their use is a necessity at the roadsides leading to mountains or valleys. On roads where reverse traffic lines are next to each other, guardrails are used for separation. Guardrails, concrete blocks, metal blocks or cable absorbers must be clearly considered to be used for the right application.
The body of guardrail is composed of 3mm thickness metal sheets of ST37 type. These are coated after forming using three different methods of hot galvanized (65 to 90 microns), cold galvanized (around 20 microns) or electrostatic (around 75 microns). Weight of each guardrail unit is 49 + 1.5Kg.
Two wave guardrail
Guardrail
GUARDRAILS FOR URBAN USE
GUARDRAIL POSTS
Guardrail posts are normally of size 12 or 14 I-beams but size 12 or 14 troughs are also used. In certain circumstances 10 I-beams or troughs can be used. Length of the post is 150 cm of which 75 cm is driven into ground by a special Pile driver .The remaining 75 cm over the road surface plus the guardrail panel Itself Prevent vehicles to be thrown out of the road. The posts are coated with Two layers of industrial paint.
SIGMA PROFILES (simple absorbers)
Sigma profile is an impact absorber which is in the form of sigma & is connected Between the guardrail panel & post. They are made of sheets of 2mm thickness & are connected to the panel with one bolt & to the post with four bolts.
PANEL TYPE: 2n- 381
POST: 190 cm size 12
OF POSTS: 2 at a distance of 191 cm
IMPACT ABSORBER: Single – 45 cm
WEIGHT OF EACH METER OF LENGTH: 28.45 cm
PANEL TYPE: 2n- 381
POST: 190 cm size 12
OF POSTS: 2 at a distance of 191 cm
IMPACT ABSORBER: Double – 75 cm
WEIGHT OF EACH METER OF LENGTH: 42.89 Kg
PANEL TYPE: 2n- 381
POST: 190 cm size 12
OF POSTS: 1 at a distance of 381 cm
IMPACT ABSORBER: Simple
WEIGHT OF EACH METER OF LENGTH: 17.79 Kg