Lifting and runway beams are utilized together with Crosby beam clamps and hoists to effectively carry out heavy rigging operations. It is important that the beam clamps selected are compatible with the lifting beams used in a particular application. This compatibility may be verified through proper engineering design and analysis to ensure a safe listing configuration is in place.
Many types of lifting scenarios may be handled effectively through the use of plate girders and wide flange beams used in conjunction with Crosby-Co Beam Clamps. These Crosby beam clamps are connected to lifting beams at three points.
Beam Clamp Elements:
Some of the elements and characteristics of Crosby-Co Beam Clamps include:
• Rated capacity of 5 to 35 tons
• Slings, spreader bars, and chokers are not required
• Includes red paint finish
• As the clamps are fastened to the load, the tongs open and automatically slide underneath the beam flange
• Gripping tongs and center plate operate jointly – as the beam weight increases, the clamping pressure increases correspondingly
• RFID enabled for all sizes
• Proof tested individually (with certification) at twice the working load limit
• A recessed base on model NS clamps accepts welded studs the beam’s surface
Safety Requirements
Lifting beams must be controlled properly at all stages in a lifting scenario. It is important for the beam to be grasped as close to the center as possible. Snubbing lines should also be used at the ends of the beam in order to avert the dangerous effects of swinging and twisting and help maintain proper beam positioning. There are specific characteristics and requirements in each lifting scenario that must be attended to properly in order to ensure a safe lift.
In any rigging scenario involving a lifting beam and Crosby beam clamps, it is vital to properly consider and adjust the lift to the required safe working load (SWL). The SWL is equivalent to the weight of the hoisting unit plus the additional external load to be carried in the lift.
Another consideration when choosing a Crosby beam clamp is the thickness and with the beam flange involved in the lifting assembly. There must be complete compatibility between the safe working load and the beam’s dimensions.
