Shandong Horizon International Co., Ltd.

Roller Barrier/Rolling guardrails
Safety roller can also called roller barrier, rolling barrier, roller type barrier, drum barrier or highway roller, and widely used on sharp carve road or bend road zone.
Safety roller is a fixture that prevent drivers and passengers from fatal accidents by not only absorbing shock energy but also converting shock energy into rotational energy. It is designed to effectively absorb shock and lead vehicle running back to the road direction to prevent large accidents at bend or carve road sites.
Safety roller will effectively function for drivers to properly control vehicles with its noticeable color and self-luminescence.
Matters need attention for setting drum guardrail:
1. Roller guardrail can be used as side guardrail of subgrade section, median guardrail, and bridge guardrail of small bridge, passage and open culvert.
2. Roller guardrail can be used as the end guardrail upstream of the driving direction. The roller guardrail should be set up at the end of the interworking shunt triangle. When the number of lanes in the road section is reduced, the roller guardrail is set in the transition section. Tunnel entrance should be set up roller guardrail to strengthen section transition.
3. The compactness of subgrade soil in the side and median shall meet relevant standards and requirements, and concrete and other measures shall be taken to strengthen it if necessary.
4. Transition treatment should be carried out between drum guardrail and other types of guardrail.
5. The rotating drum should be yellow, indicating warning.
6. When the roller guardrail is set on the inside of the carriageway or the median, the color of the reflective strip should be yellow; when it is set on the outside of the carriageway, the color of the reflective strip should be white.
7. The roller guardrail should not set the reflective delineators.

When the Horizontal Curves Radius is less than the following table, the roller guardrail should be set in the section of the Horizontal Curves.
Design speed （km/h） 120 100 80 60 40 30 20
Horizontal
Curves Radius（m） 1000 700 400 200 100 65 30

Minimum length of roller guardrails setting for different roads and parts
Road classification Individual setting
（m） Overlap joint setting（m）
High speed road 70 15
1st grade road 70 15
2nd grade road 48 10
3rd grade road 28 5
4th grade road 28 5

Roller guardrails parameters
Roller(Rolling drum) H250*φ350mm (Small roller)
H500*φ350mm (Big roller)
Steel post φ140* 4.5mm *L2150mm
Cross beam 100*80*4.0mm*L4000mm
100*80 *4.0mm*L6000mm
Connecting casing part 84*70* 4.0mm*L430mm
U connecting part U140*110*110*5.0mm
Terminal end part 500 x 220 x 3.0mm
Bolts & Nuts M20 x 50/140/180mm
Post spacing 666mm, 700 mm, 1000 mm or customized
Material Polyurethane for barrel, and Q235 for steel parts
Working temperature -60℃~70℃(-76℉~158℉)