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Revision B December 2013
www.highwayguardrail.com
21
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Durashell Nose Damage
The Durashell Nose is a resilient plastic nose that normally recovers its shape after nuisance
hits. However, if either the left or right side is damaged, it must be replaced in the following
manner.
A.
Remove the bolts and washers attaching the nose to the Cartridge.
B.
Disconnect the light plugs from the lights.
C.
Connect the light plugs to the lights in the new nose.
D.
Attach the new Nose to Cartridge using the bolts and washers previously removed.
E.
Lights and grommets, if undamaged, may be salvaged.
Minor damage to aluminum Cartridge
A.
Damage to the rear 2,100 mm [7’] of the Cartridge top and bottom outer skin or to the
rear 900 mm [3’] of the side cover with an affected area smaller than 610 mm [24”] wide
x 570 mm [22 1/2”] high x 150 mm [6”] deep may be repaired by applying appropriately
sized aluminum reinforcement to cover the damaged area. Use 0.8 mm [.032”] thick
aluminum on damaged top and bottom skins and 1.6 mm [.063”] thick aluminum on
damaged Side Covers. Pop riveting is the recommended fastening method for attaching
new parts.
B.
Damage to the front of the Cartridge, because this is the area that supports the
cantilevered weight of the system, cannot be repaired. If this area of the Cartridge has
not been crushed, extra rivets can be added as needed.
Major damage
Damage to areas larger or deeper than 610 mm [24”] wide x 571 mm [22-1/2”] high x
152 mm [6”] deep in the rear 2130 mm [7’] of the Cartridge, or any crushed area in the
front 305 mm [12”] of the cartridge is considered “major” damage. Damage to the front
1220 mm [4’] of the side covers or length ripples along any covers is also considered
“major” damage. Such damage could significantly affect the total energy absorbing
ability of the Cartridge. Repairs for “major” damage are not recommended.
See General
Information on page 22 if an evaluation is desired.
