This work consists of the sectional
corrugated metal arch described in 522. Excavation and concrete for structures are
covered in 503
and 511.
The quality of galvanizing
should be examined. Some added thickness
occurs at the bolt holes and may appear to be stripping when the bolts are
installed. Peeling, which is evidence of
separation of galvanizing around bolts or near the edges of the plates, when
pried with a knife or impacted with a hammer, is cause for rejection.
Corrugated metal arch
structure plates, high strength bolts, ribs, and anchor angles should only be
accepted from certified
suppliers listed on the Office
of Materials Management’s website.
The shipments should be accompanied by a certification document (TE-24).
Certified suppliers must
provide assembly and installation procedures with the shipment. Shipments that do not include the assembly
and installation procedures should not be accepted.
1. Be sure bearing angle or channel is at proper
alignment and grade.
2. Bolts with required nuts and washers placed.
3. Backfill per 611.06.
4. Measure length for pay.