Spreader Beam Question
Spreader Beam Question
(OP)
In the paper, "Design and Construction of Lifting Beams" by David T. Ricker, the example only checks the beam for bending. Shouldn't compression also be considered in the design since there is a horizontal force component from the resultant forces on the top lugs?






RE: Spreader Beam Question
I would definitely consider the axial load if I could assure myself that it has a load path.
Also please note that many steel sections used in these applications are very robust. Losing a load at any time is unthinkable, but when a beam/girder is part of a building it has some redundancy. While its in the air, that picking rig is the only thing between it and the ironworking crew.
Regards,

Qshake
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RE: Spreader Beam Question
RE: Spreader Beam Question
RE: Spreader Beam Question
RE: Spreader Beam Question
-The axial force needs to be accounted for in one's design (as stated by others who have responded to this post)
-Use extreme care when selecting the section to be used for the beam. Give consideration to lateral stability of the beam. I have often used square or round tubes, as the sections tend to be superior to W sections for l/t buckling.
RE: Spreader Beam Question
You may want to pass this question on to the AISC Steel Solutions Center. He's written several AISC publications.
www.aisc.org
RE: Spreader Beam Question