GUEST COLUMN
Heat and duty cycle are primary factors that will dictate whether a mill-duty product is required.
hoist, and how it is operated and controlled. It is never a case of adding an item to a cart and heading to the check-out. This is because, at the upper end of duty, the lifter cannot be considered in isolation; it is part of a system where load spectrum, cycle rates and control characteristics all influence performance and safety. By contrast, when discussing other equipment
from a material handling manufacturer’s catalogue outside the mill-duty range, the specifics of the crane and hoist tend to be far less critical, as the application demands are lower and the margins for variability are greater. ASME B30.20 BTH-1 Design Category B, Service Class 2 might be on the table in these instances. If a customer from a steel mill is requesting a
product that clearly cannot meet the rigours of their application, the manufacturer must work back up the specification scale. This means reassessing the lifter’s design category, service class and compatibility with the crane or hoist, ensuring the selected solution can safely handle the load spectrum, cycle frequency and harsh environmental conditions typical of mill-duty operations. It’s a proactive approach that prioritises safety, reliability and operational performance over simply fulfilling the initial request. Of course, there might be instances where a standard below-the-hook attachment won’t meet the criteria, nor is a full-spec mill-duty lifter necessary. Largely with steel service centres (facilities that buy steel in large, bulk quantities from mills) in mind, we provide a line of heavy industrial products. While not of the heaviest duty,
they are adequate for handling heavy steel plates and coils, moving and positioning them safely and efficiently with robust cranes and hoists, designed equally for moderate volume operations. Then there are times when a totally customised solution is required, that begin with a blank piece of paper. In these instances, the product might not resemble a coil handler, sheet plate handler, slab tong or lifting beam, and might not even be for material handling, but it meets mill-duty specifications and is engineered for the most demanding environments.
The goal is never to steer a customer towards a mill-duty product if their application doesn’t warrant it. That’s why a reputable manufacturer will gather information about the crane, hoist and end- use environment from the start. By understanding the load profile, duty cycle and operational context, vendors can guide the customer towards a lower-duty specification when appropriate, ensuring the solution is correctly matched to the application, avoiding over-specification and maintaining both safety and performance without incurring unnecessary expense.
An important consideration is always the crane and hoist that the mill-duty lifter will be attached to.
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