Operational Time Ratings at 65% Load Factor
		Uniformity Dist. Work Periods		Infrequent Work Periods
Hoist Duty	Typical Areas of Application	Max On Time Min/Hr.	Max. No. Starts/Hr.	Max. From Cold Start	Max. No. of Starts
H1	Powerhouse and Utilities, infrequent handling, Hoists used primarily to install and service heavy equipment, loads frequently approach capacity and hoist idle for long periods between use.	7.5 min (12.5 %)	75	15 min.	100
H2	General machine shop fabricating, assembly, storage, and warehousing; loads and utilization randomly distributed. Total running time not over 25% of work period.	7.5 min (12.5 %)	75	15 min.	100
H3	General machine shop fabricating, assembly, storage, and warehousing; loads and utilization randomly distributed. Total running time not over 25% of work period.	15 min (25 %)	150	30 min.	200
H4	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 over 50% of the work 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.	30 min (50 %)	300	30 min.	300
H5	Bulk handling of material in combination with buckets, magnets, or other heavy attachments. Equipment often cab operated. Duty cycles approaching continuous operation are frequently necessary. User must specify exact details of operation, including weight of attachments.	60 min (100 %)	600	N/A (Note 1)	N/A (Note 1)
Note:   (1) Not applicable since there are no infrequent work periods in Class H5 service.