14
Release 07/22
Roadside Safety Barrier
Figure 11:
Figure 12:
Figure 11: Curvature Measurements
Figure 12: Curvature Orientation
Table 5: 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 Smart
may be shop curved to fit any radius from 2.4m to 45m
Convex. 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 11.
3. Measure the corresponding centre offset (H) - refer
to Figure 11.
4. Use the values for C & H to select the radius from
Table 5.
5. Determine the curvature orientation from Figure 12.
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.
Summary of Contents for Ezy-Guard Smart
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