Once you decide your company needs new overhead cranes or other lifting devices for an existing facility, your next step is determining the required performance and design specifications. These include lifting capacity, area of hook coverage, travel pattern, span, lift height and required duty cycle of the overhead cranes – that is, how many lifts per hour, the average load per lift and the percentage of loads that approach the maximum capacity.
Chuck Snook, Director, product sales
You’ll also need to consider the design of your building and the load it is made to support. For this, you’ll need building plans and the help of a structural engineer. Your building will play a major role in your choice of standard or custom cranes. Hanging a crane from the ceiling will keep floor space as open and uncluttered as possible. But if the ceiling can’t bear the added load, you’ll have to consider a freestanding crane.
And with the freestanding option you’ll have other considerations to address, such as the floor’s capacity to support additional applied loads. Plus, you’ll want to design and install the crane so it’s as unobtrusive as possible, which will help to enhance safety and productivity.
Consider space for hook coverage and crane structure
No matter the type of crane, you must also consider the “envelope” involved. That is, the complete three-dimensional area that the crane takes up in your building. This includes the hook coverage area and space occupied by the structure of the crane. Other dimensions to consider include runway rail-to-floor, runway rail-to-lowest overhead obstruction, and rail-to-closest wall obstruction. You’ll also need to allow additional space to prevent the operation of the crane from interfering with neighboring production activity.
Keeping all this information in mind, a crane consultant can help you identify the equipment that best matches your lifting needs and building specifications. The consultant will be able to recommend options to increase safety and productivity, such as sway control, collision avoidance and zoning.
Be sure to share with the consultant your long-term material handling requirements – not just what will serve you in the near future. For example, overhead cranes, including standard and custom cranes that can grow with your business, can save you money in the long run.
One more important consideration: Don’t forget to include your crane operators in the planning process for new overhead cranes. They know the daily challenges of your lifting operations and can offer valuable insight into how to improve safety and productivity.
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