Rationale

Previously, work items WK 73138 balloted on A01 (20-06) item 016 and WK 74880 balloted on A01.18 (21-01) item 004 received negative comments that were found persuasive. This work item combines the previous work items and addresses the negative votes. Mechanical testing is optional and appears in the body of the specification. Since the tests are not required, they are being moved to the supplementary section. This is the same format used in A781/A781M, A957/A957M and other A01.18 specifications. Sections 4.1.4.3 - 4.1.4.6 have been removed, Sections 7 - 9 have been moved to S50 & S51, and Section 10 was renumbered as part of moving the mechanical tests.