Operational Time Ratings at 65% Load Factor HMI HOIST DUTY Uniformity CLASSIFICATIONS Distributed Work Infrequent Work Periods Periods Max Max. Max. Max. Hoist Typical Areas of On From No. No. Duty Application Time Cold Starts/Hr. of Starts Min/Hr. Start Powerhouse and Utilities, infrequent handling, Hoists used primarily to install and service heavy 7.5 min 15 H1 equipment, loads (12.5 75 100 min. frequently approach %) capacity and hoist idle for long periods between use.

General machine shop fabricating, assembly, storage, and warehousing; loads and 7.5 min 15 H2 utilization randomly (12.5 75 100 min. distributed. Total running %) time not over 25% of work period.

General machine shop fabricating, assembly, storage, and warehousing; loads and 15 min 30 H3 utilization randomly 150 200 (25 %) min. distributed. Total running time not over 25% of work period.

High volume handling of heavy loads, frequently near rated load in steel warehousing, machine and fabricating shops, mills, and foundries, with total running time not 30 min 30 H4 300 300 over 50% of the work (50 %) min. period. Manual or automatic cycling operations of lighter loads with rated loads infrequently handled such as in heat treating and plating operations, with total running time frequently 50% of the work period.

Bulk handling of material in combination with buckets, magnets, or other heavy attachments. Equipment often cab operated. Duty 60 min N/A cycles approaching N/A H5 (100 600 (Note continuous operation are (Note 1) %) 1) frequently necessary. User must specify exact details of operation, including weight of attachments.

Note: (1) Not applicable since there are no infrequent work periods in Class H5 service. ‘