ASME B30.21 pdf download

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 pawl operation(b) friction brake operationLever operated hoists of other types than those detailed in this volume shall be used only in accordance with
recommendations of the hoist manufacturer.Hoists used for lifting personnel require special considerations and are not included in this Volume, Speciallyinsulated hoists used for handling electrically energized power lines require special considcrations and are notincluded in this Volume.
21-1.7.2 Before Operating Hoist
(k) Hoists shall not be operated by other than hand power of one operator.
21-1.7.3 Handling the Load
(a) The hoist chain shall not be wrapped around the load.(g) Hoists shall not be operated until the load block, chain, and hoist body are directly in line with the
dircction of loading to avoid side pull.(h) The hoist body or frame shall not bear against any object or the supporting structure.(r) The operator should not leave a loaded hoist unattended unless specific precautions have been institutedand are in place.
21-2.6.2 Before Operating Hoist
(k) Hoists shall not be operated by other than hand power of one operator.
21-2.63 Handling the Load(a) The hoist wire rope shall not be wrapped around the load.(f)Hoists shall not be operated until the load block, wire rope, and hoist body are directly in line with thedirection of loading to avod side pull. The hoist body or frame shall not bear against any objcct or the supporting structure.
(g) The operator shall not apply a load beyond the rated load appcaring on the hoist or load block, exceptduring properly authorized tests.
(q)The operator should not leavc a loaded hoist unattended unless specific precautions have been institutedand arc in place.
21-3.6.2 Before Operating Hoist
(h) Hoists shall not be operated by other than hand power of one operator
21-3.6.3 Handling the Load
(a) The hoist web strap shal! not be wrapped around the load.
(f)Hoists shall not be operated until the load block, web strap, and hoist body are directly in line with thedirection of loading to avoid side pull. The hoist body or frame shall not bear against any object or the supporting structure.
(g) The operator shall not apply a load beyond the rated load appearing on the hoist or load block, exceptduring properly authorized tests.
(g) The operator should not leave a loaded hoist unattended unless specific precautions have been institutedand are in place.
Question (2):Can a chain hoist or a lever hoist be used as a sling in a two component (bridle)configuration?
Reply (2): A chain hoist or a lever hoist cannot be used as a sling in the sense that load supportingmeans of a sling (the chain, the wire rope, or the web strap) come into contact with the load. A chainhoist or a lever hoist can be used as a leg of a multiple leg sling if it is used in accordance with thefollowing requirements’in particular, and the others found in the B30.21 Volume.