valmont Ezy-Guard HC, Product Manual

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Release 08/21
High-Containment Roadside Safety Barrier
14
HIGHWAY
Figure 8: Curvature Measurements
Figure 9: Curvature Orientation
Table 3: Rail Curvature Values
Radius (m) Ø Degrees C (mm) H (mm)
2.4 95 3553 786
3 76 3710 642
4 57 3835 490
5 45 3894 395
6 28 3926 330
7 33 3946 284
8 29 3958 249
9 26 3967 221
10 23 3973 199
12 19 3982 166
14 16 3986 143
16 15 3990 125
20 12 3993 100
24 10 3995 83
28 8 3997 71
32 7 3997 62
35 7 3998 57
40 5 3998 50
45 5 3999 44
7.11 Curving of Rails
Guardrail used for the assembly of Ezy-Guard HC may be
shop curved to fit any radius from 2.4m to 45m Convex.
Ezy-Guard HC for Concave Curves can be used from 2.4m to
45m. Curves in excess of 45m do not require shop curving as
the rail can be field installed to suit. Guardrail may be curved
either concave or convex to the traffic face and can be part-
curved along its length to suit site requirements.
7.11.1 Measuring Curvature
1. Mark along the arc of the curve at 4m intervals.
2. Measure the corresponding chord length (C)
- refer to Figure 8.
3. Measure the corresponding centre offset (H)
- refer to Figure 8.
4. Use the values for C & H to select the radius
from Table 3.
5. Determine the curvature orientation from Figure 9.
7.11.2 Identification of Curved Rails
Where a rail has been factory curved by Ingal, the radius of
curvature is marked on the rear face of the rail.