Whether you plan to purchase or rent an overhead crane, you will need to know a little about the different classifications for them. The classification of the crane can help you figure out if it's right for your job or industry. Classification isn't the only consideration, but it's a good place to start.
CMAA Crane Classifications
The CMAA gives overhead cranes a letter grade which stands in for their classification. Each class has to do with the duty cycle of the crane. The duty cycles are mainly based on the crane's lifting capacity as stated on that particular crane's loading chart.
- Class A – These cranes are for infrequent service. You would use this class if your job only called for occasional crane usage. Generally, these cranes see more standby time than usage time.
- Class B – Light duty cranes are in this class. These cranes typically handle lighter loads, and only a handful of lifts in any given hour.
- Class C – These moderate duty cranes can do a little bit more than a light duty crane. They're still limited to about 10 lifts per hour at half of the crane's total lifting capacity.
- Class D – These cranes have a "heavy-duty" rating. They will handle loads at half capacity constantly. The speed of these cranes will allow them to handle upwards to 20 lifts an hour over 15ft. If your job calls for heavy crane use, then these Class D cranes will work well for you.
- Class E and Class F – These cranes have "severe," and "extra severe" service ratings respectively. These cranes handle constant loads at near capacity. They can maintain that lifting over their entire life span. However, these types of cranes require expert care and maintenance.
It may seem more efficient to just use a Class D model, even if you don't use it consistently. But you will pay more for such a crane, as well as more for its upkeep and operation. It would be better for you to pay less for a lower class model that can comfortably handle only the duties you need it to.
Let a Professional Crane Service Help You
Choosing the right class for your overhead crane is important, but it's not your only consideration. Keep in mind that you must also choose an experienced and professional supplier, operator, and service team. You should contact a crane service like Simon Crane Rental to help you figure out which class will work best for your specific needs.