W-Beam Crash Barriers
Specifications
1)The Height of Post should be 785 mm long above finish road level.
2) 1 no. spacer channel should be placed at each post.
3) Spacing of posts should be 2 m center to center.
4) W- profile formed corrugated beams( effective length of 4318 m) 311 mm x 83 mm.
5) Post consists of formed channel of size 150 x 75 x 5, 785 mm long above ground level.
6) Spacer consists of formed channel of size 150 x 75 x 5, 330 mm long.
7) Button head bolts M16 x 30 mm long, 8 nos for the splicing of the W- profile at each location.
8)Button head bolts M16 x 50 mm long, 1 nos. at the connection of the W beam to space.
9) Hex head bolts M20 x 50 mm long, 2 numbers at the connection.
11)The base material of the corrugated beam shall comply to following mechanical properties. (i)Tensile strength, Minimum 483 MPA
(ii) Elongation, in 2 inches, minimum 12% ,
(iii)Yield Strength minimum 345 MPA
12) All members of the system should be hot dipped galvanized and to have a minimum coating of 550 g/ sq m, each face in conformance to Morth specifications (Clause 810)
13) Beams to be erected on a radius of 46 m or less shall be shape curved to appropriate curvature.
14) Crash barriers are posted on all section of embankment whose height is >= to 3 m.
Horizontal curves of radius < 360m and also at all bridge approaches for length of 50 m on both sides for major & 25 m for minor bridge.
15) Beam surface facing the traffic is painted with alternate bands ( 500mm wide) of black & yellow colour reflectorified paint confirming cl. 803.5 of Morth specifications.
