55
Revision D November 2022
Post-Impact Instructions
1) Deploy the appropriate traffic-control devices to protect your crew.
2) Check to see that all anchor bolts have remained firmly anchored in the roadway surface.
Replace any that are loose, broken, or pulled out. Proper performance of the system
depends on the Monorail anchors being properly deployed.
If the system is anchored to asphalt, up to 10% of the total anchors may be replaced if
damaged. If more than 10% of the anchors are damaged, the system should be relocated
to fresh, undisturbed asphalt and redeployed using the
18” [460 mm]
threaded rods.
Warning:
QuadGuard
®
HS systems for wide hazards should never be anchored
to asphalt.
The proper performance of the system during an angle impact depends on the Monorail
anchors being properly anchored.
3) Clear and dispose of any debris on the site.
4) Check the system to be certain that the Mushroom Washer Assemblies holding the Fender
Panels together are still intact and that the system has not been deformed in a way that
would prevent pulling it intact back to its original position.
5) Be sure that the Diaphragm Support Legs are all properly attached to the Monorail.
6) Attach 3/8” [10 mm] grade 40 chain to Pullout Brackets on first Diaphragm (Figure 73).
Attach both ends of chain to a heavy vehicle (such as a 1 ton pickup).
Warning:
Stand clear in case chain breaks or becomes disconnected.
Pull the QuadGuard
®
HS system forward slowly until the system reaches its original length.
Have someone watch the system during repositioning to be certain previously undetected
damage does not cause the diaphragms to bind or pull out improperly.
7) Remove all crushed Cartridges from within the system.
Figure 73
Pullout Bracket Locations
(Nose Belt not shown for clarity)
