Chapter 26-5 of the ASME B30 Standard covers
rigging blocks, like those that you’d use with a
capstan hoist. Here’s what you need to know
about the standard*. Have more questions? Give
our Gear Experts® a call!
MATERIALS
The block should be able to permanently deform before losing the ability to support the load. This
ensures that you should notice the block has been overloaded before it fails.
Side plates should be of metal, wood, or a synthetic material. You’ll almost always see
steel or aluminum blocks in the tower industry. The sheaves and load-bearing straps or fittings
should be made of metal, as well.
Always keep your total load inside of the recommended limits set by the manufacturer. And remember that this is the maximum load applied, not a single line load. Meaning if the block is rigged at the top of the tower and you’re lifting something that weighs 1,000 pounds, there could be up to 2,000 pounds on the block. Check out this competent rigger training course for more on these concepts.
Always keep your total load inside of the recommended limits set by the manufacturer.
And remember that this is the maximum load applied, not a single line load. Meaning if the block is rigged at the top of the tower and you’re lifting something that weighs 1,000 pounds, there could be up to 2,000 pounds on the block. Check out this competent rigger training course for more on these concepts.
IDENTIFICATION
Each block has to have markings for manufacturer, rated load, and acceptable rope sizes. The block should also be maintained by the user to insure these markings remain legible through the life of the hardware.
TRAINING
Users must be properly trained to select, inspect, and fully use the blocks. That means not just in proper rigging, but also this very standard.
INSPECTION, REPAIR, & REMOVAL FROM SERVICE
A qualified person should designate whether the hardware is suitable for rigging, and remove from service it it’s not. Prior to use, all blocks should be inspected to verify compliance with ASME B30. A visual inspection should be performed each time the block is used.
A qualified person should designate whether the hardware is suitable for rigging, and remove from service it it’s not. Prior to use, all blocks should be inspected to verify compliance with ASME B30. A visual inspection should be performed each time the block is used. Permanently installed rigging hardware should have periodic inspections as well.
Repairs or modifications must be specified by the manufacturer or a qualified person. The replacement parts should meet or exceed the original manufacturer specifications. Unless advised by the manufacturer, modifications are not recommended.
OPERATING PRACTICES
Obviously, load ratings should not be exceeded. Make sure you’re keeping clear of the block, its running lines, load, or any other part of the system during lifting. That includes walking or standing under a
Permanently installed rigging hardware should have periodic inspections as well.
Repairs or modifications must be specified by the manufacturer or a qualified person. The replacement parts should meet or exceed the original manufacturer specifications. Unless advised by the manufacturer, modifications are not recommended.
OPERATING PRACTICES
Obviously, load ratings should not be exceeded. Make sure you’re keeping clear of the block, its running lines, load, or any other part of the system during lifting. That includes walking or standing under a