M

= As Constructed Drawing

consider what elemental plans should spring from them. The CI/SfB project manual offers a sensible method for identifying these. The complete range of elements in CI/SfB table I is available, and offers a useful check list (see chapter 1).

Generally speaking, however, few projects—and then only those containing problems of a specialised nature—will need to go beyond the much more limited range shown in table IV.

Other location drawings: Site plan, elevations and basic sections complete the set of location drawings. The complexity of the external works will influence the decision on whether or not to put all location information on a single drawing, but this is an area where co-ordination of information is of paramount importance and this may outweigh the other advantages inherent in the elemental approach.

Location sections: These are best identified from the final design drawings. The external envelope of the building will generate the majority and the most important of these so the approach illustrated in 5.7 is useful.

Bearing in mind that the approach initially is in terms of strictly limited strip sections rather than the traditional 'iin section through the building', work systematically round the elevations, marking on a print the necessity for a fresh section every time the condition changes. You will finish with a series of L(21) details—desirably at a scale of 1:50—whose function will be to establish all important vertical dimensions and to provide references to larger scale (and largely repetitive) assembly details of head, cill and eaves, etc.

The location drawings have now been covered, and table V lists them as they would appear in the drawing register.

S.SA useful format for the drawing register. The explanatory notes help site staff as well as the drawing office

Assemblies, components and schedules The assembly drawings, component drawings and schedules appropriate to a project of this nature are listed in table VI.

The drawing register

The drawing register is a key document in the proper organisation of a working drawing project and as such needs to be something rather more than the loose sheet of paper with a scribbled list of drawing numbers and titles which sometimes suffices. After all, it serves a multitude of purposes, being at various times a declaration of intent, a record of performance, and, in the event of dispute on abandonment of the project after commencement of the working drawings, possibly a legal document.

In any case, it will have a relatively long and hard life, so it should be housed in a hardback folder or file, preferably of a colour striking enough to make it easily identifiable in the drawing office (it is essential that it be to hand immediately whenever a drawing is completed) and in a loose leaf format so that sheets may be removed and inserted easily. A4 is the obvious size, and 5.8 illustrates a useful format.

It is strongly recommended that the register be prepared at the beginning of the working drawing programme, immediately the approximate list of required drawings has been identified. Its sequence of entries, therefore, will be similar to that of the hypothetical list of drawings and schedules given in Tables V and VI; that is to say, it will be divided into location, assembly, component and schedule categories, and a separate sheet will be given to each CI/SfB element used. In consequence, there will be a relatively large number of sheets in the register, but the advantage will be that the bones of the drawing structure are laid out for all to see, in strict numerical sequence, and that if subsequently the need for a fresh drawing is identified (and the initial identification is unlikely to be accurate to within 5 per cent) then it may be entered without disruption either of the drawing numbering sequence, or of the register's own page order.

Within this framework the make-up of the individual register sheet may vary, but the information it should provide will consist of, at the minimum:

1. Drawing category—ie location, assembly, component or schedule.

2. Drawing element—its CI/SfB number, or other coded reference.

3. Drawing number—its unique identification within the category and element.

4. Revision suffix—sensibly added in pencil to facilitate revision.

5. Scale—not essential to the record, but can be helpful.

6. Size of sheet—because A4 and A1 drawings are unlikely to be stored in the same container, and the searcher must be told where to look. One test of the effectiveness of a drawing retrieval system is that it should always be quicker to locate the given drawing in the register and then go to it straight away than to leaf hopefully through the vertifile.

The date of completion and the dates of any revisions are not included, for they will be recorded on the drawing itself. Neither is it desirable to use the drawing register as a record of drawing issues. In the first place this practice imposes an administrative strain on the drawing office, which is likely to react unfavourably to seemingly bureaucratic procedures. In the second place, there is really very little to be gained from such a record. A check on drawing issues should be possible from other in-built procedures, such as standard drawing circulation lists, or drawing issue sheets.

Status coding

As has been noted earlier, many drawings perform different functions at different stages in their life, and some system of identifying their function at a given moment is a useful adjunct to a coding system.

One such method is to use the letter reference of the appropriate RIB A stage of work in conjunction with the drawing number, as a pencilled prefix: E Detail design drawing. Any working drawing up until the time it is frozen for issue to the quantity surveyor when it becomes:

Table V Location drawings listed as they would appear in the drawing register

Drawing number

Scale Title

Comments

L(--)001

1:100 Plan at level 1—Basic

These are the basic floor plans from which copy negatives will be taken

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