Steel beams are extensively used in production for manufacturing hoists. The multi-directional force resilience provides a great benefit for hoisting loads and the unique shape contributes to the strength-to-weight ratio of the hoist.
Depending on the type of crane, different steel beams are used. The load capacity of the crane, as well as how the beam is supported will determine the most suitable type of beam.
For example, an overhead crane that is supported by the building structure at both ends will use a single or double I-beam, depending on the load capacity and height clearance. A cantilever crane-that is only supported from one end-is manufactured using an S-beam because the tapered flanges optimize the load capabilities without requiring additional support. (PWI does not use S-Beams except for repairs. We would use a W-beam in building a new product)
The shape of a flange, whether tapered or not, enables the use of a trolley that easily attaches to the inside edge of the flange. The side plates of the trolley have wheels with lubricated bearings that bear on the beam flange.
Trolleys can be manually operated but these are limited to around 5 tons because the effort to move them becomes too great for 1 person. For ease of use and more accurate placement, sites would use a geared or electric beam trolley that allows for ease of motion and precise placement of the load.
In addition to forming the structure of a crane, structural beams can also function as below-the-hook devices such as spreader beams. These can be configured in single beams or H-shapes to accommodate different loads.
