Pete_K
Mechanical
- Sep 23, 2015
- 50
This is cross-posted in Mechanical Engineering Other Topics.
In BTH-1-2017, Section 3-1.2, there is this language about lifting magnets:
"The loads used in the design of the structural and mechanical components of a lifting magnet shall be derived based on the maximum breakaway force of the magnet. Resolution of these loads into member and connection forces shall be performed by an accepted structural analysis method."
Later, in 6-2.1, (b):
"Lifting magnet suspension devices should meet the lifting magnet manufacturer's recommendations. If any such devices are used during breakaway testing and are not rated for the breakaway force of the lifting magnet, they shall be removable for the purpose of load testing as required by ASME B30.20."
My question is, in the first passage, what is their scope of the term "lifting magnet"? Are they referring to the magnet itself, or is it used to identify the entire lifting device, such as a lifting beam which carries 4 magnets? In the second passage they seem to differentiate the magnet from what suspends it (like a lifting beam?). The implication, or the reason I ask, is that as it relates to the design of the beam, it would have to be designed for the breakaway force of the magnets, as opposed to being design for the stated rated capacity.
Thanks in advance for any responses.
In BTH-1-2017, Section 3-1.2, there is this language about lifting magnets:
"The loads used in the design of the structural and mechanical components of a lifting magnet shall be derived based on the maximum breakaway force of the magnet. Resolution of these loads into member and connection forces shall be performed by an accepted structural analysis method."
Later, in 6-2.1, (b):
"Lifting magnet suspension devices should meet the lifting magnet manufacturer's recommendations. If any such devices are used during breakaway testing and are not rated for the breakaway force of the lifting magnet, they shall be removable for the purpose of load testing as required by ASME B30.20."
My question is, in the first passage, what is their scope of the term "lifting magnet"? Are they referring to the magnet itself, or is it used to identify the entire lifting device, such as a lifting beam which carries 4 magnets? In the second passage they seem to differentiate the magnet from what suspends it (like a lifting beam?). The implication, or the reason I ask, is that as it relates to the design of the beam, it would have to be designed for the breakaway force of the magnets, as opposed to being design for the stated rated capacity.
Thanks in advance for any responses.
