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Construction Specifications

National Engineering Handbook (NEH), Part 642, Construction Specifications

Selected files are available in Adobe Acrobat PDF (Portable Document Format). 

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

Download NEH Part 642 in its entirety.