6.3 ARCHITECTURAL AND TECHNICAL DRAWINGS, SCALE AREA

6.3A. Preliminary rule

6.3A1. Scope.

Apply these rules, at all levels of description, to all architectural and technical drawings.

6.3A2. Punctuation

For instructions on the use of spaces before and after prescribed punctuation, see 1.0C.
Precede the scale area by a full stop, space, dash, space.

6.3A3.

Use English words and abbreviations in this area.

6.3A4.

This area is repeatable.

6.3A5.

The scale area may be used with other material specific areas.

6.3B. Statement of scale ¹

6.3B1.

Give in English the scale in the units of measure found on the unit being described. If there is no English equivalent for the name of the unit of measure, give the name, within quotation marks, as found on the unit being described.

Scale 1’’ to 2’

Scale 1/2 ‘’ to 1’

Scale 1/4’’ = 1’0

Scale 1/4’’ = 10’

Scale 11/2 ‘’ = 1’0’’

or, give the scale of the unit being described (except as noted below) as a representative fraction expressed as a ratio (1: ) as instructed in 5.3B;

Scale 1:500

Scale [1:48]
(Verbal statement reads: 1/4’’ to 1’)

Scales [1:12] 1’’ to 1’ and [1:24] 1/2 ‘’ to 1’

Scale [1:60] and [1:96]

Precede a scale statement by Scale. If the unit being described consists of data on computer file(s), follow the preceding rules and precede the scale by Input scale. Give the scale even if it is already recorded as part of the title proper or other title information.

If no scale statement is found in the prescribed sources of information or other sources of information, record Scale not given. Optionally, calculate² the scale from a bar graph or by measuring known distances on the drawing, and give it in square brackets preceded by ca.

Scale [ca. 1:24]

6.3B2.

If there is no mention of scale on the unit being described and it is known to be at full scale, give Full scale, or Scale [1:1]

6.3B3.

If the unit being described has two scales, give both. Give the larger scale first.

Scales 1/2 ‘’ to 1’ and 1/8 ‘’ to 1’

Scales 1:50 and 1:100

Scales [ca. 1:12] and [ca. 1:48]

Scales 1’’ = 1’0’’ and 1/8 ‘’ = 1’0’’

Scales [ca. 11/2 ‘’ = 1’0’’] and 3/4 ‘’ = 1’0’’

6.3B4.

If the unit being described has three or more scales, and one or two scales clearly predominate, give the predominating scale(s). If no scale(s) predominate, give Scales differ. Scales not recorded here may be given in a note (see 6.8B9) or in the Scope and content (see 6.7D).

6.3B5.

If the unit being described is not drawn to scale (e.g., sketch, conceptual plan), give Not drawn to scale.

6.3B6.

In describing a model or three-dimensional representation, optionally, give the vertical scale (specified as such) after the horizontal scale if the vertical scale can be ascertained and is different from the horizontal scale.

Scale [1:480]. Vertical scale [1:48]