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Maximum Length of a Sheet Metal for Plate Lifting Magnet
Posted on May 23, 2016
WARNING: The sheet steel of 7’ long x 14ga gripped by lifting
magnet PL-550, shown in the photo below, is bending severely.
Such lifting operation is very dangerous
because the sheet is too long and too thin for a single PL-550.
When a PL-550 or PL-1100 lifting magnet lifts a sheet
metal, the unsupported overhang of the sheet metal would bend due to gravity and possibly peel
off from the lifting magnet when the sheet metal is too big and too thin.
For safe lifting, the length of a sheet metal to be lifted using a single lifting
magnet of the PL models must be less than the listed value below. If not, you have to
use additional PL lifting magnets connected by a spreader beam.
| Plate Thickness | Max. Length of a sheet metal/plate to be lifted | |
| For PL-550 | For PL-1100 | |
| 22 Ga. | Not Work | Not Work |
| 18 Ga. | Not Work | Not Work |
| 16 Ga. | Not Work | Not Work |
| 14 Ga. | 4' | Not Work |
| 11 Ga. | 4' | 4' |
| 3/16" | 5' | 5' |
| 1/4" | 5' | 5' |
| 5/16" | 5' | 5' |
| 3/8" | 6' | 6' |
| 1/2" | 7' | 7' |
Besides the maximum length of the sheet metal to be lifted, you must also consider the width of the sheet metal because larger width means greater weight of the unsupported overhang, resulting more bending of the sheet metal and a more peeling force therefore. Further more, the air gap between the lifting magnet and the sheet metal, which may be created by dust, rust, painting or burrs, could also greatly reduce the lifting capacity of the lifting magnet of PL-550 and PL-1100. For more information, see http://www.armsmag.com/specifications-pl550.pdf and http://www.armsmag.com/specifications-pl1100.pdf