Section 603 — Structural Plate Structures

Description

603.01This work consists of designing and constructing structural plate pipes, arches, pipe arches, boxes, and underpasses.

Material

603.02Conform to the following Subsections: Aluminum- alloy structural plate structures 707.06 Asphalt- coated structural plate structures 707.07 Steel structural plate structures 707.05

Construction Requirements

603.03General. Excavate and backf ill according to Section 209.

603.04Erecting. Provide steel, aluminum alloy, asphalt coated steel, or asphalt -coated aluminum alloy structural plate structures. Submit a copy of the manufacturer’s assembly instructions be fore assembly. Show the position of each plate and assembly order. Assemble the structural plates according to the manufacturer’s recommendations. Prevent damage to the structural plate and its coating. Clear sand, gravel, and other foreign material from t he corrugations within lapped sections of the plates. Ensure plates have a proper fit -up. Where aluminum alloys come in contact with other types of metal, coat the contacting surfaces according to Subsection 602.05. Torque bolts according to the manufacturer’s recommendations. For structures having a span greater than or equal to 20 feet:

(a)Tighten the longitudinal seams when the plates are assembled unless the plates are held in shape by cables, struts, or backfill. Properly align plates circumferentially to avoid permanent distortion from the design shape. Before backfilling, do not exceed 2 percent variation from the design shape;

(b)Do not distort the shape of the structure by operating equipment over or near it;

(c)Provide surve y control on the structure to check structure movement;

(d)Check and control the deflection movements of the structure during the backfilling operation. Do not exceed the manufacturer’s recommended limits; and

(e)Provide a manufacturer’s representative to monitor the erecting and backfilling of the structure.

603.05Acceptance. Material for structural plate structures will be evaluated under Subsections 106.02 and 106.03. Installation of structural plate structures will be evaluated under Subsections 106.02 and 106.04. Excavation and backfill will be evaluated under Section 209.

Measurement

603.06Measure the Section 603 pay items listed in the bid schedule according to Su bsection 109.02 .

Payment

603.07The accepted quantities will be paid at the contract price per unit of measurement for the Section 603 pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05 .