Cooperating organizations

The Timber Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations:

British Plastics Federation
British Woodworking Federation*
Department of the Environment (Building Research Establishment Princes Risborough Laboratory)*
Department of the Environment (Construction Industry Directorate)
Department of the Environment (Housing and Construction)*
Fibre Building Board Development Organization Limited*
Forestry Commission
Institute of Wood Science
Institution of Civil Engineers
Institution of Municipal Engineers
Institution of Structural Engineers
National Federation of Building Trades Employers
National Sawmilling Association
Royal Institute of British Architects*
Royal Institution of Chartered Surveyors
The Softwood Agents’ and Brokers’ Association
Timber Packaging and Pallet Confederation
Timber Research and Development Association*
Timber Trade Federation

The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard:

Asbestos Cement Manufacturers’ Association
Association of Builders’ Hardware Manufacturers
British Lock Manufacturers’ Association
Department of the Environment (Interdepartmental Construction Development Group)¹⁾)
Department of the Environment (PSA)
Flat Glass Manufacturers’ Association
Greater London Council
Guild of Architectural Ironmongers
Institute of Carpenters
Institution of Fire Engineers
Joinery Managers’ Association Limited
Modular Society for Advancement in Building
North Group London Housing Consortium

This British Standard, having been prepared under the direction of the Timber Standards Committee, was published under the authority of the Executive Board and comes into effect on 30 June 1980

First published March 1972

First revision June 1980

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

Committee reference TIB/23

Draft for comment 78/12956 DC

Foreword

This revision of BS 4787‑1 has been prepared under the direction of the Timber Standards Committee. BS 4787‑1 was first published in 1972. Since then, experience has shown that minor amendments to the permissible deviations are desirable; these are made in this revised edition. Work sizes for external doors and doorsets have also been amended to facilitate the combination of doors with windows. The opportunity has been taken to remove tables of work sizes for glazed openings, standard code references for door types and other parts of the 1972 edition no longer considered to be appropriate. The possible provision of ancillary items (e.g. blockings, architraves etc.) has again been included in Appendix A.

This first Part of BS 4787 deals only with metric dimensional requirements. It takes full account of the recommendations for dimensional co-ordination given in BS 4011, BS 4330 and PD 6444. It also takes account of BS 4471 and BS 1186‑1 and BS 1186‑2 and BS 6262, and of draft international standards currently being prepared insofar as they are relevant.

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 Part of this British Standard specifies the metric sizes for dimensionally co-ordinated internal and external wood doorsets, door leaves and frames.

The provision of ancillaries is covered in Appendix A.

2 References

3 Definitions

4 Sizing conventions

4.1

4.2

5 Sizes of doorsets, door leaves and frames

5.1 Co-ordinating and work sizes of internal doorsets

5.2 Co-ordinating and work sizes of external doorsets

5.3 Sizes of internal and external door leaves (for single doors).

6 Sizes of glazing openings

6.1 Glazing openings in flush door leaves

6.2 Work sizes of glazing openings in internal and external panel door leaves

7 Fire resisting doorsets

8 Deviations from plane, squareness and local surface flatness

8.1

8.2

8.3

9 Fixing positions for hardware

9.1 Position of lock/latch

9.2 Position of lock/latch block

9.3 Position of hinges

Publications referred to

BS 4787-1:1980

Internal and external wood doorsets, door leaves and frames - Specification for dimensional requirements

Current

Published:

30 Jun 1980