Work Item
ASTM WK87436

Revision of C1716/C1716M-21 Standard Specification for Compression Testing Machine Requirements for Concrete Masonry Units, Related Units, and Prisms

Rationale

Sections 4.10, Annex A1.2.1.1, Annex A1.3.1.1 and Fig A1.3 reference the allowable Maximum Support Width (MSW) and Maximum Bearing Width (MBW) of a given platen or bearing block configuration. Some users have expressed confusion with the term ‘width’ and how it relates to the allowable test specimen’s dimensions.
This ballot item proposes to increase clarity by reorganizing the information in 4.10 into a more logical flow and making it clear that the MSW and MBW refer to the maximum allowable diagonal dimension of a rectangular test specimen. A reference to this diagonal dimension was added to Fig A1.3 to graphically illustrate this issue.

Details

Developed by Subcommittee: C15.04

Committee: C15

Staff Manager: Krista Robbins

Work Item Status

Date Initiated: 08-09-2023

Technical Contact: Ray Henderson