The objective is to perform the design calculations for the lifting beams considering for a capacity of 350 tones as per the specifications and then. Our spreader beams are specially designed to provide you with a lightweight solu tion so your cranes can work at maximum capacity without the weight of heavy. Aisc manual of steel construction asd, ninth edition, 1989 1. Regardless of how the lifting capacity is established, the next step is to calculate the forces that act on the beam. When lifting and carrying precast elements, the lifting load has to be. Lifting beam calculation bending beam structure scribd. A quick hand structural analysis of a metric simple span beam with a distributed load. Spreader beams lift loads with single or multiple attachment points. Omer blodgett, design of welded structures, 1966 2. It covers all aspects of the selection, design, manufacture, verification, testing, repair, modification, storage, inspection and safe use of lifting beams and spreader beams. Avon engineering designs spreader beams for safety, durability and simple operation. Lifting beam calculation free download as excel spreadsheet. Likewise, the lifting beam will have two corresponding lift features. Some lifting beams are made with a bottom lug aligned directly below the top lug so that, if the need arises, an occasional straight pick can be made without the inconvenience of having to remove the lifting beam.
Based on the bth1 calculations, if the beam length is short enough the beam yield strength limits the lift capacity of the beam, but if the beam length is over the lateral bracing spacing requirement per calculations in bth1, the buckling strength of the structural member defines the allowable lift capacity of the beam, resulting in a reduced maximum allowable bending stress. A lifting beam can also be used as a strong back to provide multiple lifting points on a relatively flexible object see fig. A lifting beam is a solid or fabricated m etal beam, suspended from a hoistcrane or from forks of a forklift, designed to pro vide multiple lifting points. The working load acting on the main beam is 800 tons. In this study, a 2x400 ton gantry crane main beam is designed and analysis with numerical method is performed. A belowthehook lifting device that utilizes two or more hooks attaching devices located along a beam and the spreader beam attaches to the hoist by means of a bail. Ricker lifting beams also known as spreader beams are used to underside for attachment to the object to. Design and construction of lifting beams semantic scholar. Ricker, design and construction of lifting beams, engineering journal, 4th quarter, 1991. This is also in line with the load ratings for other components of the lifting assembly such as slings, shackles, etc.
Spreadsheet part 2 for the design and verification of lifting lugs and padeyes. Peerless lifting beams are prooftested to 125% capacity and suitable for stabilizing heavy loads and can be utilized where headroom is limited. Each unit is designed for your specific application and complies with asme standards. Scribd is the worlds largest social reading and publishing site. This low headroom lifting beam handles large loads using. Design aid 6 beam design formulas with shear and moment.
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