Description: B-3703 - WAKE COUNTY Location: Bridge #137 on SR1404 over Middle Creek
Item(s) of Interest:
3 - 50'span cored slab structure with an asphalt wearing surface .
3.5% superelevation
Both ends of the cored slabs were fixed and the 1½" joints were filled with grout.
Observations and Points of Discussion:
Bent caps were excessively deep (4'-0") for cored slabs.
Traffic speed appeared excessive for the one bar metal rail.
There were transverse cracks over the bents, despite the ends of the cored slabs being fixed and the joints being filled with grout. The Bridge Maintenance Unit suggested utilizing pave-prep tape over the joints, but it was pointed out that this detail is prone to asphalt spalls.
There were questions on why the plans showed hold-down plates at each corner of the bridge.
The rip-rap slope protections appeared to have migrated as a result of being undersized.
ACTION ITEM(S):
Construction will provide a list of cored slab bridges where all ends were fixed, for the purpose of monitoring the condition of the asphalt overlay.
NC DOT
NC DOH
NC GOV
