ASME B30.21 pdf download Manually Lever Operated Hoists Section 21-0.1 -Scope of B30.21 Within the general scope defined in Section l, B30.21 applies to manually lever operated hoists utilizingchain (sec Fig. 1), wire rope (see Fig. 2), and web strap (see Fig. 3) for the purpose of lifting, pulling, andtensioning applications, comprising hoists of the following types: (a) ratchet and...