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Bryan Donaldson Full Interview

  • Mark Gibson

Mark Gibson

29 Apr 2022
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Bryan Donaldson Full Interview

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Where the breaking load number actually comes from

Where the breaking load number actually comes from

This article explains where the Minimum Breaking Load (MBL) on a rope or piece of hardware comes from. The number is not the force at which one sample happened to snap. It is worked out from a set of break tests using a method called three-sigma, and this is
05 Jul 2026 12 min read
Is IRATA worth it for circus riggers?

Is IRATA worth it for circus riggers?

This article sets out what IRATA training is, what each of its levels teaches, and where it does and does not help a circus rigger. It will not make you a rigger or tell you whether to book a course; the aim is to give you a clear picture of
21 Jun 2026 6 min read
IPAF and powered access

IPAF and powered access

This article sets out what IPAF training is, what the PAL Card scheme certifies, and where powered access fits in circus rigging. If you have looked into working at height, IPAF comes up often in the requirements on operating a scissor lift or a cherry picker. It is the training
13 Jun 2026 6 min read
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