Specifications for Construction Contracting

National Engineering Handbook (NEH)
Part 642

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National Engineering Handbook Part 642 is a complete replacement for National Engineering Handbook Section 20. 

Please read the  transmittal letter for Part 642 (amendment 1) for additional information.

Table of Contents

Chapter 1 - General Contract Specification Procedures 

Chapter 2 - National Standard Construction Specifications

Chapter 3 - National Standard Material Specifications

Download NEH Part 642 in its entirety.