WORKING DRAWINGS HANDBOOK, Fourth Edition

Component, sub-component and assembly drawings

sill at a particular junction but if it purports to show this
junction then others will expect to use it for their own
purposes and it is no use being explicit about the
window sill and vague about the wall finish beneath it.
An assembly drawing is, by definition, a correlation of all
the elements and trades involved.

So too the information should be exhaustive in the
sense that no aspect of the construction, no variant on a
basic detail, should be ambiguous or left to the
discretion of the operative. ‘Typical details’ are just not
good enough.

Coding assembly drawings

A complete system for coding the drawing

package is discussed in Chapter 5 but a note

here on the coding of the drawings illustrated

in 3.17, 3.18and 3.20may be helpful.

The general arrangement sections (3.17)

are coded G for general arrangement; (2-)

for primary elements (see notes on general

arrangement sections earlier for the

reasoning on this); and 017, 018 and 019

because that is their sequence in that

particular series.

The references in the circles are to external

wall details or to external wall opening

3.18 Assembly sections derived from 3.17

3.19 Unnecessary elaboration wastes

time and helps nobody