Reference Materials

Standard Specifications

2020 Standard and Supplemental Specifications

The 2020 Standard and Supplemental Specifications are only available in the following electronic format. Hard copies are not available.

• Spec Book V2.0 - effective February 11, 2021
• Quarterly
• Spec Book V2.1 - effective April 29, 2021
•  
• Spec Book V1.0
• Quarterly
  • Spec Book V1.1 - effective April 23, 2020
  • Spec Book V1.2 - effective July 16, 2020
  • Spec Book V1.3 - effective December 17, 2020

Future Updates
Spec Book V2.2 - July 15, 2021
Spec Book V2.3 - September 9, 2021

Redline

• 2020 Redline - (Information Only)
• 2021 Redline - (Information Only)

Specification Revisions

Comment period on draft specs closes on the last day of the month (listed).

• Draft and Final Specification Revisions
• Specification Revision Process

Please send comments and proposed specification changes to:

Calculation Examples

• Combined Gradation Example