59
Revision D November 2022
Post-Impact Instructions
Warning:
If either (
wide or narrow
) 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.
Narrow or Wide System
1) Deploy the appropriate traffic-control devices for protection.
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.
The proper performance of the system during an angle impact depends on the Monorail
Anchors being properly anchored.
Caution:
QuadGuard
®
Wide systems should
never
be anchored to asphalt.
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 back to its original position.
5) Be sure that the Diaphragm Support Legs are all properly attached to the Monorail.
Caution:
Use safety goggles and gloves when refurbishing the Mushroom
Spring Assembly.
Do not place fingers underneath an assembled Mushroom
Washer. Parts may suddenly shift and fingers may be pinched. If the spring is still
under compression as the nut is nearing the end of the bolt, to prevent injury, make
sure that the spring is restrained with a clamp so it does not suddenly release when
nut is removed from the Mushroom Washer Bolt.
6) Attach chain to Pullout Brackets on first Diaphragm for QuadGuard
®
Narrow or Wide
(Figure 71). 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.
Figure 71
Pullout Brackets
Slowly pull the QuadGuard
®
system forward until fully
restored to 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.
