EN 1317–2

EN 1317–2 covers requi­re­ments for safe­ty bar­ri­ers, how they shall be tested and how their pro­per­ti­es are to be described.

Con­tain­ment level

The strength or abi­li­ty to hold back col­li­ding vehicles is descri­bed by the safe­ty bar­ri­ers con­tain­ment level. Safe­ty bar­ri­ers with low ang­le con­tain­ment as in clas­ses T1-T3 are inten­ded for tem­po­ra­ry use only and can­not be CE-marked. Bar­ri­ers clas­si­fi­ed as nor­mal (N), high and very high (H or L) con­tain­ment level are for per­ma­nent use and shall be CE-marked.

Test

The stan­dard defi­nes 11 dif­fe­rent tests for safe­ty bar­ri­ers. The­se are named TB (test bar­ri­er) follo­wed by a two digit num­ber. The first figu­re, 1 to 8, tells the type of vehic­le used and the other, 1 or 2, the appro­ach type (speed and ang­le) if dif­fe­rent such exists.

Examp­le:

  • TB31: TB (test bar­ri­er) + vehic­le type 3 (1500 kg car), test 1 (80 km/h and 20 degrees)
  • TB32: TB (test bar­ri­er) + vehic­le type 3 (1500 kg car), test 2 (110 km/h and 20 degrees)

For con­tain­ment level N2 or hig­her at least two tests have to be car­ri­ed out. Com­mon for the­se con­tain­ment levels is that test TB11 always is a part. The TB11-test is per­for­med to pro­ve that the safe­ty bar­ri­er is not too hard and does not expo­se pas­seng­ers in a small car col­li­ding with it for too hard strains.

The safe­ty bar­ri­er’s con­tain­ment level is deter­mi­ned from tests with hea­vi­er vehicles. The mass of the­se vehic­le vary between 1500 kg (TB32) to 38 000 kg (TB81).

To rai­se the safe­ty of bar­ri­ers with high or very high con­tain­ment level an extra test with a hea­vy car (TB32) can be per­for­med. The con­tain­ment level of such safe­ty bar­ri­ers are named L ins­te­ad of H, for examp­le L1 (with TB32) ins­te­ad of H1 (wit­hout TB32).

Wor­king width

The wor­king wid­th of a safe­ty bar­ri­er is a mea­su­re of how much spa­ce that is nee­ded behind the bar­ri­er to allow it to fun­c­tion pro­per­ly when impacted.

The wor­king wid­th W is the sum of the bar­ri­er’s wid­th and the dyna­mic deflec­tion D at an impact cor­re­spon­ding to the con­tain­ment level test.

Vehic­le intrusion

The vehic­le intru­sion of a safe­ty bar­ri­er is a mea­su­re of how much spa­ce that is nee­ded behind the bar­ri­er at a cer­tain height,

nor­mal­ly 4 m abo­ve ground, to pre­vent the col­li­ding vehic­le from bum­ping into the object pro­tec­ted by the bar­ri­er. Vehic­le intru­sion VI is mea­su­red from the traf­fic face of the bar­ri­er and is decla­red for high con­tain­ment (H1-H4 och L1-L4) bar­ri­ers only.

Impact seve­ri­ty level

A safe­ty barrier´s level of impact seve­ri­ty gives an assess­ment of the safe­ty for occu­pants in an impacting vehic­le. The­re are three levels; A, B and C. Impact seve­ri­ty level A is the safest for occu­pants in an impacting vehicle.

Some examples:

  • Impact seve­ri­ty class A: safe­ty bar­ri­er with W‑profile
  • Impact seve­ri­ty class B: vehic­le para­pet with W‑profile
  • Impact seve­ri­ty class C: non defor­mab­le concre­te barriers

Resistan­ce to snow remo­val operations

To illust­ra­te how tough a safe­ty bar­ri­er is against local dama­ges cau­sed by a snow plough, safe­ty bar­ri­ers are clas­si­fi­ed from 1 to 4.

Some examples:

  • Class 1: safe­ty bar­ri­er with 2 mm W‑profile from ste­el S420
  • Class 2: wire rope fence
  • Class 3: safe­ty bar­ri­er with 3 mm W‑profile from ste­el S235
  • Class 4: Kohl­s­wa and SF profile