This British Standard was published under the authority of the Standards Policy and Strategy Committee on 4 October 2005

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

Committee reference B/519/1
Draft for comment
02/102216DC
15/30286611DC

ISBN 978 0 580 83645 9

Committees responsible for this British Standard

The preparation of this British Standard was entrusted by Technical Committee B/519, Masonry and associated testing, to Subcommittee B/519/1, Masonry units, upon which the following bodies were represented:

Autoclaved Aerated Concrete Products Association
Brick Development Association
British Civil Engineering Manufacturers’ Association/Civil Testing Machine Manufacturers’ Association
British Precast Concrete Federation
Ceram Research Ltd.
Concrete Block Association
National House-building Council
Stone Federation
Co-opted members

Foreword

This British Standard is published by BSI Standards Limited, under licence from The British Standards Institution.

This British Standard has been prepared under the direction of Technical Committee B/519.

BS 4729:2005+A1:2016 supersedes BS 4729:2005, which is withdrawn.

Text introduced or altered by Amendment No. 1is indicated in the text by tags and . Minor editorial changes are not tagged.

Although the specifications for clay text deleted masonry units (including declaration of dimensions by the manufacturer and limiting dimensional tolerances) are covered by BS EN 771‑1, specific work sizes of masonry units are not standardized on a European level. BS EN 771‑1 specifically excludes methods of measurement, tolerance and range requirements for dimensions, angles and radii characteristics of specially shaped clay masonry units.

BS 4729 provides a list of specified designations for work dimensions and angles of bricks traditionally used in the United Kingdom, including those of special shape. These designations may be used as a means of declaring the configuration of the units as is required by BS EN 771 Parts 1 and 2. Clay text deleted masonry units of other dimensions and shapes may be used in practice but, unless their nominal dimensions conform to those in this standard, they cannot be designated in accordance with this standard and use the designation to declare their configuration. This standard will be periodically reviewed and modified to reflect current general usage.

The scope of BS EN 771 Parts 1 and 2 includes bricks of shapes other than those that fit within the overall envelope of a rectangular parallelepiped, and the shapes and dimensions of these are given in BS 4729. The test methods published in the BS EN 772 series of standards have, in general, been developed for units of a rectangular parallelepiped shape.

NOTE A new Annex D has been produced to provide an interpretation of how the test methods in the BS EN 772 series should be applied to clay masonry units of shapes within the scope of the standard in order that these products may be characterized and CE marked.

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 64, an inside back cover and a back cover.

The BSI copyright notice displayed in this document indicates when the document was last issued.

1 Scope

This British Standard gives guidance for the dimensions of bricks, including those of special shape, made from clay text deleted , traditionally used in the construction of brick masonry in the UK. Requirements for bricks are covered by BS EN 771 Parts 1 and 2.

NOTE Derivation of dimensions of special shapes and typical examples of applications of special shapes are shown in Annex C (Figures C.1 and C.2 and Table C.1).

Annex D gives recommendations for how the principles of the test methods in the BS EN 772 series of standards are to be applied to text deleted clay bricks conforming to BS EN 771‑1:2016 with shapes as described in BS 4729. The properties covered are those required to enable the products to be characterized and CE marked. The table of requirements (reproduced from Table ZA.1.2 of BS EN 771‑1:2016 together with an indication of the relevant clause in Annex D for such marking) is given in Annex I.

2 Normative references

3 General

3.1 Information from purchasers

3.2 Forms of bricks

3.3 Faced surfaces

3.4 Colour and surface texture

3.5 Left- or right-handed bricks

3.6 Compressive strength

3.7 Durability

4 Shapes and dimensions

5 Designation

BS 4729:2005+A1:2016

Clay bricks of special shapes and sizes. Recommendations

Current

Published:

4 Oct 2005