TrinityHighway.com
30
Created November 2021
Note:
The reflective sheeting may be placed on the spacer for CASS
®
S4(29) based on the
state/specifying agency’s specification.
Repair for CASS
®
S4(29) Impact (CRP Involved)
When the system has been impacted and CRP is involved, follow the steps below:
1. Inspect the damaged system and determine what material will be required to make the
repairs.
2. For the CRPs that have been impacted, inspect the top and bottom post for damage.
Repair and replace any damaged posts. See the
“CCT Post Assembly”
section. For
any other posts that have been damaged, follow the criteria in the
“Repair for CASS
®
S4(29) Impact (CRP Not Impacted)”
section.
3. Attach any detached cables and re-tension the cable.
Emergency Repairs
There is a possibility that an accident could cause significant traffic congestion, or the cable can
be entangled with the vehicle. When a vehicle is entangled in the cable, the first step that must
be undertaken is to move or drive the vehicle as close to the centerline of the cable system as a
feasible, in order to reduce tension. The following suggestions may help to get traffic moving and
the cable untangled:
Road Blocked Due to an Accident
To resume traffic flow after an accident or to get emergency vehicles access to the accident site,
crossover access through the cable may be necessary. To provide this access, remove cables
from several posts upstream and downstream of the desired opening. The opening width can be
adjusted by removing posts from the ground sleeves. The cable can be held down and the traffic
or emergency vehicles can pass over it.
PPE equipment such as protective gloves, safety goggles, and mask must always be used.
Keep
personnel out of the area upstream and/or downstream from the point of the cut.
In life threatening or emergency situations the cable can be cut.
If the cable was put under additional tension due to the accident, the tension can be reduced at
the turnbuckles closest to the impact. The turnbuckle can be backed off; however,
it is critical
that the fittings remain engaged within the turnbuckle a minimum of 3/4” [19mm] when the
cable is under tension.
To reduce the amount of the cable damage during cutting and limit fraying, tape must be wrapped
around the cable and the cut made through the tape.
Some agencies have also cut through
the turnbuckle itself.
This may help to reduce the maintenance/repair effort. When cutting
through a turnbuckle, ensure that all posts, both upstream and downstream for a distance of 50’-
0” [15 m], are removed in order to prevent turnbuckle or fitting interference.
If time permits, the tension can be released by pushing over one or more of the CRP(s) with a
piece of equipment.
Removing Entangled Cable from a Vehicle
When the cable is entangled with a vehicle that must be towed away, remove the entangled cable
by lifting one or more of the cables up over the vehicle. During this operation, if any of the line
posts entangled with the cable start to lift up out of the sleeves, the lifting must be stopped and
the posts removed from the cable. Once the posts are removed, the cable can be lifted up over
the vehicle.
In addition, if the entangled vehicle is located near the CCT end, it is possible to reduce tension
