Committees responsible for this British Standard

The preparation of this British Standard was entrusted by the Civil Engineering and Building Structures Standards Policy Committee (CSB/-) to Technical Committee CSB/57, upon which the following bodies were represented:

Association of Consulting Engineers
Association of Consulting Scientists
British Constructional Steelwork Association Ltd.
British Steel Industry
Building Employers’ Confederation
Concrete Society
Construction Health and Safety Group
Construction Industry Training Board
Department of the Environment (Property Services Agency)
Electricity Supply Industry in England and Wales
Engineering Equipment and Materials Users’ Association
English Net Manufacturers’ Association
Federation of Civil Engineering Contractors
Health and Safety Executive
Institute of Building Control
Institution of Civil Engineers
Institution of Structural Engineers
National Association of Formwork Contractors
National Association of Scaffolding Contractors
National Federation of Master Steeplejacks and Lightning Conductor Engineers
Prefabricated Aluminium Scaffolding Manufacturers’ Association
Suspended Access Equipment Manufacturers’ Association

This British Standard, having been prepared under the direction of the Civil Engineering and Building Structures Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 31 October 1990

First published as BS 1139 November 1943

Second edition November 1951

Third edition June 1964

Fourth edition as BS 1139-1 April 1982

Fifth edition as BS 1139-1.2 October 1990

The following BSI references relate to the work on this standard:

Committee reference CSB/57
Draft for comment 87/15200 DC

Foreword

This Section of BS 1139 has been prepared under the direction of the Civil Engineering and Building Structures Standards Policy Committee. Together with Section 1.1, it supersedes BS 1139‑1:1982, which is withdrawn.

This Section of BS 1139 is one of a series specifying requirements for the design, construction and testing of equipment for use in scaffolding and other temporary structures. It specifies requirements for aluminium tubing of the type traditionally used in tube and fitting scaffolding.

The need for this new edition arose because of the advent of European proposals covering steel scaffold tube, whereas any such action for aluminium tubes is further away. Steel tubing is now covered in BS 1139‑1.1. This Section retains the style and technical content of the 1982 edition, and is substantially the same as the 1964 version.

The separate Parts and Sections are as follows.

Part 1: Tubes;
Section 1.1: Specification for steel tubes;
Section 1.2: Specification for aluminium tube;
Part 2: Couplers;
Section 2.1: Specification for steel couplers, loose spigots and base plates for use in working scaffolds and falsework made of steel tubes (Identical with EN 74);
Section 2.2¹⁾: Specification for aluminium couplers, fittings and accessories for use in tubular scaffolding;
Part 3: Specification for prefabricated access and working towers;
Part 4: Specification for prefabricated steel splitheads and trestles;
Part 5²⁾: Specification for materials, dimensions, design loads and safety requirements for service and working scaffolds made of prefabricated elements. (Identical with HD 1000)

A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application.

Compliance with a British Standard does not of itself confer immunity from legal obligations.

1 Scope

This Section of BS 1139 specifies requirements for the material, dimensions and method of manufacture of extruded aluminium tubes for use in scaffolding. It specifies one grade of material and one range of dimensions. Appendix A describes a drift expanding test for extruded aluminium scaffold tubes.

NOTE The titles of the publications referred to in this standard are listed on the inside back cover.

2 Method of manufacture

3 Materials

3.1 General

3.2 Chemical composition

3.3 Mechanical properties

4 Dimensions and tolerances

5 Workmanship

6 Finish

7 Identification

BS 1139-1.2:1990

Metal scaffolding. Tubes - Specification for aluminium tube

Current, Under Review

Published:

31 Oct 1990