Since the second edition of this book appeared in 1986 there have been a number of developments in the field of working drawings. The most significant have been:
• the publication of the Common Arrangement ofWork Sections
• the publication of the Co-ordinated Production Information concept
• the enlarging and up-dating of BS 1192 on Construction Drawing Practice
• the increasingly widespread use of computer aided drawing.
The first three of these may be dealt with fairly simply. The Common Arrangement is a concept currendy more attuned to the work of the quantity surveyor than that of the architect, and although attempts have been made and will undoubtedly be made in future to reconcile it with the needs of the drawing-producing disciplines it would seem that the use of Cl/Sfb is now so firmly rooted that it is likely to remain unchallenged.
The Co-ordinated Project Documents are of greater importance and are dealt with briefly in the text; but they basically endorse and lend authority to the recommendations already made in previous editions of the Handbook. Where there are minor differences these are noted, but other than that there seems no reason why the existing sections on this subject should not remain substantially intact.
The long overdue revision of BS 1192 largely codifies what has become standard practice, with the important exception of various additions in the field of Computer Aided Drawing. CAD itself is a subject which was only referred to briefly in the second edition and which now, clearly needs to be dealt with in greater detail.
The use of CAD is still developing and any statement about it is liable to become out of date between the writing of the text and its printing. All that can be done is to present the state of the art as it stands; a certain confidence in doing so is derived from the fact that computer hardware is still a considerable investment for any practice, and hence is unlikely to be scrapped arbitrarily whenever something newer appears on the market. Nevertheless, the increasing ingenuity of software programmes, which are relatively inexpensive in themselves, tends to require hardware with continually expanded memories if full advantage is to be taken of them. I am grateful to Autodesk for producing the examples of computer aided drawing illustrated in chapter 4; and to the Royal Institute of British Architects and Force International Ltd for their permission to use various copyright documents.
Thanks are due on a personal level to Simon Jones of Autodesk and Andrew Bichard of the Autodesk User Group for their invaluable advice and assistance during the writing of the sections dealing with CAD.
Finally, I must repeat the caveat which appeared in the Preface to the second edition. The illustrations have been selected - indeed, in many instances devised - solely for their function in illustrating points made in the text, and are not presented as working details to be used for any other purpose.
The opportunity has been taken in this new edition to make some minor corrections and modifications to matter appearing in earlier editions.
This book had its origins in the series of articles of the same name published in the Architects' Journal in 1976 and 1977. My thanks are due therefore to my fellow contributors to that series, Patricia Tutt, Chris Daltry and David Crawshaw, for many stimulating discussions during its production, and to the Architects' Journal for allowing me to reproduce material from it.
The text however has been re-written, and responsibility for the views expressed and recommendations made is mine alone. I had hoped at the outset to illustrate the book with actual drawings taken from live projects, but for various reasons this proved to be impracticable. Invariably the scale was wrong, or the drawing was too big, or would not reproduce satisfactorily, or was too profusely covered with detail irrelevant to the immediate purpose.
In the event the drawings in the book have been drawn for it especially, or have been re-drawn for it from source material supplied by others. My thanks for providing such source material are due to Messrs Oscar Garry and Partners, the Department of Health and Social Security, Messrs Kenchington Little and Partners, The Property Services Agency and my own practice, Peter Leach Associates.
Finally, I must record my enduring gratitude to my wife, Alison Styles, who not only produced a typescript from my illegibly hand written draft but managed to survive my bad temper during the writing of it.
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