Spreader Bar Lifting Device Calculations And Design

Sparta s approach to optimizing the spreader bar design otherwise known as lifting bar or lifting beam is an iterative process.

Spreader bar lifting device calculations and design.

Spreader bar lifting device calculations and design spreader bar lifting device calculations and design. Design and construction of lifting beams david t. Spreader beam ox worldwide capacity of 9 to 1350 tons load using a spreader beam for lifting stawi industries cpcclrg3002a licence to perform intermediate rigging pages offset lift beam adjule 200 75 max span spreader beam ritm industryritm industry. An overview of asme bth 1 spreader bars and lifting beams when planning to design lifting beams or any other below the hook lifting devices there are many aspects that must be considered beyond finding materials that meets a few basic engineering calculations.

Lifting beam v lifting spreader lifting beams lifting frames and lifting spreaders are a means of providing two or more lifting points from the hook of the lifting machine or crane spaced so as to match the position of the lifting points on the load. Therefore the requirement that special custom design grabs hooks clamps or other lifting accessories be proof tested prior to use is mandatory and failure to comply is a violation of osha requirements. This page will be dedicated to all forms of lifting equipment including spreader bars lifting beams custom lifting equipment and anything else that falls into this category. Most erectors and riggers accumulate an assortment of lifting beams during the course of time.

The difference lies in the way the forces are transmitted. Along with stress buckling is also a critical factor in lifting beams that must be addressed in detail to ensure that the structure can handling the loads imposed on it. Spreader bars are the best choice for loads where the lift points are far apart and load control is important. Some common profiles are shown in fig.

Ricker lifting beams also known as spreader beams are used to assist in the hoisting process. The basic lifting beam is shown in fig. Variations in the design of the multi lift spreader bar evolve over a period of time as requirements and technology change and the demand for a more efficient product is desired. How to design a spreader bar.

Safe working load swl spreading length safety factor in compression yield stress of the beam material allowable tensile stress. Other than for slings it appears that there are no inspection criteria for below the hook lifting devices in the osha.