What is the difference between EN 131 and ANSI ladder ratings?

EN 131 is the European standard, expressing duty as Class I (industrial), II (trade) and III (domestic). ANSI A14 is the US standard, using Type IAA, IA, I, II and III. They are separate systems with different load points, so a ladder is certified to one or the other.

What does the maximum load include?

The rated load is the total weight the ladder must safely support, including the user, their clothing, tools and any materials being carried. Always stay under the rating with a safe margin.

Is EN 131 Class III safe for trade use?

No. Class III is the lightest domestic rating at 95 kg and is intended for occasional household tasks. Trade and professional work should use Class II or, for heavy industrial duty, Class I.

What is ANSI Type IAA?

Type IAA is the heaviest US duty rating at 375 lb (170 kg), intended for extra-heavy industrial use. It sits above Type IA (300 lb) and Type I (250 lb).

Does this tool store anything?

No. It is a static reference that runs entirely in your browser. Nothing you type is uploaded, logged or stored.

What is the Ladder Safety Class Reference?

Reference table for ladder duty ratings under EN 131 and ANSI A14 standards, listing maximum load in kg and lb plus the typical use class for industrial, trade and domestic ladders. It runs free in your browser on Gera Tools, with nothing uploaded.

Ladder Safety Class Reference

Name: Ladder Safety Class Reference
Creator: Gera Tools
License: https://creativecommons.org/licenses/by/4.0/

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Reading ladder duty ratings

A ladder’s duty rating tells you the maximum total weight it is certified to carry, and the kind of work it is built for. Europe and the UK use the EN 131 classes (I, II, III), while the US uses the ANSI A14 types (IAA, IA, I, II, III). The two systems are independent, so a ladder is rated under one or the other — never both.

How it works

The rating is a structural limit set by the manufacturer when the ladder is tested to the relevant standard. The load it quotes is the combined weight of the user plus everything they carry: clothes, tools and materials. Choosing a class above your real working weight gives a safety margin and reduces wear.

This reference lists each EN 131 class and ANSI type with its rated load in both kilograms and pounds, and the use case it is intended for. The search box filters every column at once.

Quick comparison table

EN 131 (UK / EU)

Class	Max load	Intended use
I (Industrial)	150 kg	Heavy-duty professional and industrial
II (Trade)	115 kg	Light professional, tradespeople
III (Domestic)	95 kg	Occasional household tasks

ANSI A14 (United States)

Type	Max load	Intended use
IAA (Special duty)	375 lb / 170 kg	Extra-heavy industrial
IA (Extra heavy)	300 lb / 136 kg	Heavy industrial
I (Heavy duty)	250 lb / 113 kg	Professional construction
II (Medium duty)	225 lb / 102 kg	Light trade use
III (Light duty)	200 lb / 91 kg	Household, occasional

Choosing the right class: worked example

A 90 kg electrician carries a tool belt (8 kg) and a drill and cable reel (7 kg), for a total working load of about 105 kg. Checking both standards:

EN 131 Class III (95 kg) — too light by 10 kg; do not use.
EN 131 Class II (115 kg) — adequate, with a 10 kg safety margin.
EN 131 Class I (150 kg) — preferred for daily professional use; 45 kg margin.
ANSI Type I (250 lb / 113 kg) — just adequate; Type IA gives more comfort.

The rated load is a structural test limit, not a working load recommendation. Many safety authorities and insurers expect professionals to work at 75–80% of the rated capacity as a practical margin, which pushes a 105 kg user toward Class I or Type IA as the practical minimum.

Key differences between the standards

The EN 131 and ANSI systems use different test loads, testing frequencies, and durometer rung standards, so a ladder certified to one standard cannot be assumed to comply with the other. Always check the duty label riveted to the stile — this is the legally binding figure for the specific ladder in your hands, not the class rating you expect it to have.