Abstract： ASME B30.19:2005 pdf download.Cableways. (d) All operating ropes such as load ropes, trolley (inhaul-outhaul) ropes, and luffing tackle ropes shall have a minimum design factor of 3.5, except for rotation resistant rope, which shall have a...

ASME B30.19:2005 pdf download.Cableways.

(d) All operating ropes such as load ropes, trolley (inhaul-outhaul) ropes, and luffing tackle ropes shall have a minimum design

factor of 3.5, except for rotation resistant rope, which shall have a minimum design factor of 5.

NOTE: The rope site and construction as defined above shall be determined on the basis of rope loads re..ulling from 11w dedgner/

manufacturers ratings, approved reeving, and published nominal breaking strength of new rope under static conditions. Ropes of

material other than steel may be used only in accordance with the designer’s recom nwndatilns

(e) All operating ropes shall be of sufficient length to permit the entire range of movement specified for the application and

leave at least two full s’raps of rope on the drum at all times.

19-1.3.4 Sheaves

(a) Sheave grooves shall be free from surface defects that could cause rope damage. The cross-sectional radius at the bottom of the groove should be such as to form a close-fitting saddle for the size of rope used. The sides of the groove shall be tapered outward and rounded at the rim to facilitate entrance of the rope into the groove. Flange rims shall run true about the axis of rotation.

(b) Sheaves carrying ropes that can be momentarily unloaded shall be provided with close-fitting guards or other devices to guide

the rope back into the groove when the load is applied again.

(C) The sheaves in the lower load block shall be equipped with close-fitting guards that will minimize ropes from becoming fouled

when the block is landed and the ropes are loose.

(d) Means shall be provided to minimize chafing of the ropes.

(e) All running sheaves shall be equipped with means for lubrication. Permanently lubricated, sealed, and/or shielded bearings are acceptable.

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