Français
4. Situation elements
4.1 Definition
A situation element is a geometric element such as a point [PT], straight line [SL] or plane [PL] defined in the nominal model, which will be associated with a surface or a reference system.
The situation element must be invariant to all residual degrees of freedom of the reference system.
For a very long time, these geometric elements have been widely used by designers, sometimes with a commentary for greater clarity. Formalized under the name of situation elements, they are not very detailed in standard 5459, which leaves a great deal of freedom in their use.
The Ultimate Scientific and Technical Reference
This article is included in
Design and production
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Situation elements
Contact elements
Bibliography
Standards and norms
- Geometric product specification (GPS) – ISO coding system for linear size tolerances – Part 1: Basics of tolerances, deviations and fits - NF EN ISO 286-1 - 2010
- ISO 965 ISO metric threads for general use – Tolerances – Part 1: Principles and fundamentals - NF ISO 965-1 - 2013
- Geometric product specification (GPS) – Geometric tolerancing – Form, orientation, position and runout tolerancing - NF EN ISO1101...
The Ultimate Scientific and Technical Reference
