6 quickies for rigging engineers lifting beams and spreader bars have become an integral part of complex crane rigging and lifting activities.
Lifting spreader bar design.
All liftmax spreader bars come standard with stainless steel data plates with individual serial numbers and rfid tracking and are proof tested to 125.
It covers all aspects of the selection design manufacture verification testing repair modification storage inspection and safe use of lifting beams and spreader beams.
Spreader bar design process designing lifting and spreader beams.
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Spreader bars lifting spreaders are a very simple device and consist of a long bar that functions to hold a sling apart to the lifting distance.
To lifting beams simplelet spreader bar lifting device calculations and design spreader beams vs lifting definitions differences spreader beams vs lifting definitions differences design and ysis of pressor package skid.
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.
The basic lifting beam is shown in fig.
The main difference between a lifting beam and a spreader bar is the design which dictates the way the force is transmitted during the lift.
A lifting beam is under pressure at the single lifting point and therefore subject to shear and bending while a spreader beam is designed to work under compression and spread the load out evenly over a.
Ricker lifting beams also known as spreader beams are used to assist in the hoisting process.
Most erectors and riggers accumulate an assortment of lifting beams during the course of time.
The table of contents next page lists the sections covered and contains links to each section.
In response a large below the hook lifting devices market has grown supporting projects with some exceptional solutions see modulift liftmax caldwell.
Meets or exceeds asme.
Spreader bar lifting device calculations and design spreader bar lifting device calculations and design.
Verification of spreader beams lifting beams and lifting frames.
We are the lifting equipment design specialists geared specifically for building custom lifting devices according to the asme bth 1 design standard and asme b30 20 below the hook standards.
Safe working load swl spreading length safety factor in compression yield stress of the beam material allowable tensile stress.
Sparta s approach to optimizing the spreader bar design otherwise known as lifting bar or lifting beam is an iterative process.
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Some common profiles are shown in fig.
Design and construction of lifting beams david t.
Custom liftmax telescoping spreader bar.
