ISO 3443-4:1986 PDF

Name: ISO 3443-4:1986 — Tolerances for building — Part 4: Method for predicting deviations of assemblies and for allocation of tolerances
SKU: ISO 3443-4:1986
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Tolerances for building — Part 4: Method for predicting deviations of assemblies and for allocation of tolerances

Название (английский):

ISO 3443-4:1986

Tolerances for building — Part 4: Method for predicting deviations of assemblies and for allocation of tolerances

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 11
Дата публикации:: 19 декабря 1986 г.
Издание:: ISO IS 3443 edition 1 version 1
ICS:: 91.200

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Описание (английский):

Indicates some general principles and a method for predicting deviations in composite systems and specifying tolerances for the constituent elements in order to meet functional requirements and tolerance specifications for the assembly. Applies to tolerances and deviations in all kind of assemblies and other systems composed of elements, within the building industry.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 3443-4:1986 - Tolerances for building, Part 4 defines a method for predicting deviations of assemblies and for the allocation of tolerances to constituent elements so that an assembly meets its functional requirements. Published by ISO, this part applies across the building industry to systems composed of multiple elements (components, joints, set-out distances, etc.). It provides statistical and geometric procedures designers and manufacturers can use to relate component tolerances, joint clearances and the probability of fit.

Key topics and technical requirements

Propagation of deviations: Mathematical expressions and procedures to calculate how individual element deviations combine to produce an overall assembly deviation.

Statistical approach: Uses means, standard deviations and correlation coefficients to model uncertainty; treats unmeasured deviations as probability distributions.

Probability of fit: Procedures to specify tolerances so that joint clearances fall within required limits with a known probability (acceptance level).

Tolerance allocation: Methods for distributing allowable assembly tolerance among constituent elements to optimize manufacturing and erection requirements.

Target size selection: Guidance for choosing target/reference sizes for components to maximize probability of fit across applications.

One‑dimensional focus with annex for multi‑dimensional cases: Core formulas assume mostly one‑dimensional elements (beams, columns); the annex includes calculation procedures and tables for common 2D and 3D joint cases.

Inspection and acceptance linkage: Shows how inspection sampling, rejection criteria and specified tolerances affect predicted variability and quality planning.

Practical applications and users

ISO 3443-4 is practical for:

Building designers and structural engineers - to set coherent component and joint tolerances during design for predictable assembly performance.

Prefabrication manufacturers - to determine target sizes and production tolerances that optimize fit in multiple applications.

Contractors and erection teams - to predict on-site joint clearances and plan erection procedures that control variability.

Quality control and inspection planners - to relate specified tolerances and sampling procedures to expected rates of rejection and assembly compliance.

Typical uses include tolerance allocation for prefabricated façades, modular coordination, floor and wall panel systems, and any composite building assembly where dimensional coordination and probability of fit matter.

Related standards

ISO 3443 series (Parts 1, 2, 3, 7) - complementary principles, statistical basis and target-size selection

ISO 1803/1 and ISO 1803/2 - tolerances vocabulary and related terminology

ISO 4464 - relationship between types of deviations and tolerances

Keywords: ISO 3443-4, tolerances for building, tolerance allocation, predicting deviations, assembly deviations, probability of fit, building tolerances standard.

ISO 3443-4:1986 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Технические детали

ISO 3443-2:1979

Tolerances for building — Part 2: Statistical basis for predicting fit between components having a normal dis…

ISO 1803-1:1985

Building construction — Tolerances — Vocabulary — Part 1: General terms

ISO 1803-2:1986

Building construction — Tolerances — Vocabulary — Part 2: Derived terms

ISO 4464:1980

Tolerances for building — Relationship between the different types of deviations and tolerances used for spec…