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Sub-component construction details— sheet 4

standardisation. Theoverall size of component is specific to the project, but the frame sections are standard regardless of component size.

Schedules

Schedule number S (31) 001 S (31) 101 S (32) 001 S(32)101 S(32)001

Tide

Schedule of external openings Schedule of external ironmongery Schedule of internal openings Schedule of internal ironmongery Schedule of manholes

* The examples given are sufficient to illustrate the principle. In practice, other component drawings might cover, for example: copings, pre-cast cladding panels (21), stairs, cat-ladders (24), lintols (31) and (32), balustrades (34), rooflights (37), skirtings (42) litterbins and bollards (70).

Comments

When the number of components in a category is small, and/or the number of ways in which potentially they may vary is also small, then it may be left to the appropriate location drawing to identify them, and to the appropriate component drawing to illustrate them. Once you start getting half-a-dozen types, however, and each type may vary as regards its head and jamb assembly, ironmongery and architrave, then it becomes a better bet to number the components on the plan and to refer the searcher to a schedule in which can be tabulated all the variables applying to a given component.

The three main schedules in this set are of this kind. Each gives a numbered list of manholes and openings and uses this as the starting point from which to refer to drawings covering all the variables affecting the component.

The ironmongery schedules are rather different in purpose and in format. They are essentially vocabularies of fittings, made up into sets. The opening schedules call up the set of fittings to be fixed to the relevant door or window.

5.9 Status coding of a drawing indicates only its status at the present time. This stamp freezes the drawing at the point when it relates to the other contract documents and is invaluable in controlling the contract

F Production drawing. Issued to the quantity surveyor who, during measurement, produces his own query list, picking up discrepancies, additional information required, etc. When these comments have been incorporated in the drawing, it becomes: G Drawing reconciled with bill of quantities. That is the stage at which the drawing forms part of a tender set (5.9). It may not be released for construction, however, until it becomes: K Construction drawing. Finally, and where the need for record drawings justifies it, the drawing becomes: M As constructed.

This enables drawings to be issued for information only without fear that, for example, the quantity surveyor will measure from an incomplete drawing, 01 that the contractor will build from unauthorised information.

The method is also of value when a drawing is prepared as a basis for a manufacturer to prepare his own component drawing. In this case the architect prepares his own reference drawing with a status E. This is issued to the manufacturer, whose own working drawing is issued to site, the architect's drawing remaining at status E.

A typical drawing number, containing all the information referred to above, would be as shown in 5.10.

Circulation

The greater the use that is made of the drawing register the more important does it become to exercise proper discipline in its maintenance and circulation. In particular, it is a useful procedure for the up-dated register (and those of the other consultants) to be copied to all concerned at regular intervals—eg on the first of each month, or as part of the site meeting agenda—so that all team members are aware of the up-to-date position. This is of even greater importance when drawings are being issued in sequence, whether for billing or construction purposes. The recipient's attitude to a given drawing will be conditioned by his knowledge that further amplifying details are envisaged as part of the complete set.

Other people's drawings

The proper recording and storage of incoming drawings often presents a problem, particularly when their numbering system bears no relation to the structure of the architect's own set. Should one open up an incoming drawings register for each consultant and manufacturer, laboriously entering drawing titles and number and date of receipt? Should one even attempt to give each incoming drawing a fresh number, to bring it into line with internal systems, and to aid storage and subsequent retrieval?

These methods are laborious and irksome, and unless they are carried through 100 per cent efficiently they are liable to break down. If only one drawing goes unrecorded because it was needed urgently for reference purposes at the drawing board before anyone had time

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