Architect Brickwork Drawings

the drawing at that scale meant that more information could be conveyed legibly than would have been the case had the size of the project necessitated the use of a scale of 1:100. So again a (2-) summary drawing sufficed for all the primary elements.

A point is worth making about the way in which the brickwork was described in each case, because it illustrates the fundamentally common-sense way in which all such decisions should be handled. In the larger building there were four different types of brickwork involved. These were:

1. A Class II engineering brick in cement mortar, used in manholes and certain works below ground.

2. A common brick to BS 3921 Part II, laid in a 1:1:6 mortar mix and used generally for all backings.

3. A sand-lime facing to BS 187, laid in 1:1:6 mortar to a Flemish bond, and used generally as a facing brick to wall panels.

4. A hand-made fired clay facing brick, used in certain featured areas on the entrance facade, and laid to a decorative pattern.

A schedule of brickwork types formed part of the specification, in which each type; was fully identified and described. The reference Fgl/3 on the drawing indicates that it is the third type of brickwork in that schedule, which since the project included the National Building Specification as part of its documentation was to be found in the Fg (bricks and blocks) section of that specification. 'Brickwork Type 3' would have been an equally specific identification.

On the smaller project, however, only two types of brick were used—a common brick and a facing brick. So, in this instance, the description 'facing brick'—assuming the specification has fulfilled its proper descriptive function—was perfectly adequate.

In neither case is it likely that the routine of the drawing office was disrupted a year later by someone telephoning from site to ask 'which brick goes here?'.

Location plans—secondary elements: Although produced from the same basic negative, the (3-) plan illustrated in 2.14 has, at first glance, almost the appearance of being a photographic negative reproduction of the corresponding (2-) plan illustrated previously. Where the earlier drawing showed the walls heavily lined, there is now the thinnest of indicative outlines. Where the (2-) plan left in outline the breaks in walls left for doors and windows we now have those breaks heavily framed to emphasise the components that are to fill them. As in the (2-) series, annotations and references to assembly drawings and scheduled information are confined to those elements which form the subject of the drawing.

The drawing covering the installation of (7-) fittings (2.15) follows this same principle.

The example in 2.16 illustrates the virtues of secondary structuring of drawings and the inherent flexibility of elementalisation when used with common sense and imagination. The project in question was one of a number dealing with a similar building type, each of which involved the appointment of a nominated sub-contractor for various shop-fitting works. With certain building elements—doors, pelmet and skirtings, for example—being carried out by the main contractor in some areas and by the shopfitter in others, it was important that the method of documentation employed should be capable of defining satisfactorily the limits of responsibility for each. It was also desirable that it should provide for separate packages of information being available upon which each could tender.

The method adopted in practice was to treat all the work of the shopfitter as a (7-) fittings element, regardless of rigid CI/SflB definitions, and to record it on a (7-) location plan, while the work of the main contractor appeared on separate location plans covering (2-) primary elements, (3-) secondary elements and (4-) finishes. Assembly drawings involving the work of both main contractor and shopfitter were referenced from all the relevant location plans, and were included in both packages of information.

Location plans—format: With very small buildings it is perhaps pedantic to ask that each of (two) plans be drawn on a separate piece of paper when both fit perfectly happily one above the other on a single A2 sheet. In general, however, it is desirable that each sheet should be devoted to one plan level only, the size of the building and the appropriate scale determining the basic size of sheet for the whole project.

Leave plenty of space on the sheet. Apart from the fact that this tends to get filled up by notes, etc during the course of the drawing's production (the addition of three strings of dimensions on each face alone adds considerably to the original plan area of the drawing), it must be remembered that the drawing's various users will in all probability wish to add their own notes to the prints in their possession.

Location elevations—external

Given the plan view and sufficient sections through an object, it is arguable that it is unnecessary to show it in elevation for the object to be fully comprehended. That so much often goes wrong on a building site, even with the benefit of elevations, is an illustration of the fact that the construction process often has little connection with formal logic; in practice to erect a building without a set of elevations is a little like trying to assemble a jig-saw puzzle without the picture on the lid to refer to from time to time.

Nevertheless, it is as well to remember that the elevation's function is primarily pictorial rather than informative, and that in consequence it should not be made to carry information more sensibly conveyed by other means.

If elevations are to be of relevance they must be complete, and this means not just the four views—front, back and two sides—that sometimes suffice, but sectional elevations covering re-entrant points in the plan shape and the elevations of courtyards.

2.16 Elementalisation used flexibly in practice. The {!-) location drawing shown gives a clear exposition of the responsibilities ofone nominated sub-contractor- in this case the shopfitter 38

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