TS EN 131-1+A1

TS EN 131-1+A1 is the standard that establishes the common technical language and basic dimensional framework for ladders. It applies to portable ladders intended for general professional and non-professional use, and it helps define which products belong within this shared ladder family. Rather than setting detailed performance tests, it focuses on terms, types, and functional sizes so that ladder products can be described and compared consistently.

Why terms and types matter

Ladders come in several structural forms and use patterns, such as leaning ladders, stepladders, and more complex folding or telescopic systems. The value of this part lies in organising that variety under a common terminology. Manufacturers, suppliers, users, and test-related stakeholders can then refer to the same component names and dimensional concepts, making it clearer what type of ladder is being discussed, which sizes are meaningful, and which companion standard applies.

Boundaries of application and related standards

• It covers portable ladders designed for general professional and non-professional use.
• Portable ladders designed and limited by their design and instructions to a specific professional use are excluded.
• Separate related documents are noted for multi-hinge joint ladders (EN 131-4), telescopic ladders (EN 131-6), and mobile ladders with platforms (EN 131-7).
• Step stools are outside this document; EN 14183 applies to that product category.
• For work near high-voltage installations EN 61478 applies, and for work near low-voltage electrical installations EN 50528 applies.

In general technical terms, functional sizes are the dimensions that define usability, reach, and geometric suitability; measurements such as spacing, width, and overall proportions are central in ladder standards. TS EN 131-1+A1 is therefore best understood as a terminology and classification reference within the EN 131 series, rather than as a standalone test-method standard.