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Instructions For Use of Construction Specification 51

CORRUGATED METAL PIPE

  

1. APPLICABILITY

Construction Specification 51 is applicable to the installation of all types of corrugated metal pipe conduits.

2. MATERIAL SPECIFICATIONS

The following specifications are complementary to Construction Specification 51:

a. Coated Corrugated Steel Pipe. Specification 551

b. Aluminum Corrugated Pipe. Specification 552

3. ITEMS TO BE INCLUDED IN CONTRACT SPECIFICATIONS AND DRAWINGS

a. Line and grade of the conduit.

b. Details of the pipe bedding including description and grading limits of the bedding material.

c. Details of wall fittings, joint and other special pipe fittings.

d. Details of struts or ties, as necessary.

e. Pay limits or actual limits for excavation and backfill, if required. Due consideration of OSHA safety requirements for trench excavation should be considered for pay quantities.

f. Applicable material specifications.

g. Type, class, size, gauge, and length of pipe.

h. Type of coupling and gasket, if required. Coupling bands may be detailed on the drawings and described in Section 11, or may be specified in Section 11 by describing the performance requirements by reference to ASTM A 798, Paragraph 8, Pipe Installation. Using ASTM A 798, joint watertightness may be specified per paragraph 8.2.4.6 Watertightness, however, the method of testing and the basis for determining acceptance is needed.

i. Close riveting or double riveting, if required.

j. Type of pipe coating, if required.

k. Methods of measurement and payment if the contract specification includes more than one method.

l. Backfill requirements. Compaction requirements should be equal to requirements for the adjacent embankment for principal spillways or similar installations.

4. DISCUSSION OF METHODS

a. Section 10, Measurement and Payment

The methods are self-explanatory.

When specifications are prepared using electronic procedures and all but one method is deleted for use in the contract specification, delete "All Methods The following provisions apply to all methods of measurement and payment." and left justify the remaining text.