Documentation Requirements – 522 Sectional Corrugated Metal Arch Structures
This work consists of the sectional corrugated metal arch as described in 522. Excavation and concrete for structures are covered in 503 and 511 respectively.
Quality of the galvanizing should be examined. Some added thickness occurs at the bolt holes and may appear to be stripping when the bolts are installed. Peeling as evidenced by 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 web site. 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 603.10
4. Measure length for pay