Preferred Scales For Drawings...

The preferred scales are 1:1, 1:2, 1:5, 1:10, 1:20, 1:50, 1:100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BS EN ISO 5457 Drawing Sheet Sizes

Designation	Trimmed Sheet		Drawing Space 0.5mm		Untrimmed sheet 2mm
-	Width (mm)	Length (mm)	Width (mm)	Length (mm)	Width (mm)	Length (mm)
A0	841	1189	821	1159	880	1230
A1	594	841	574	811	625	880
A2	420	594	400	564	450	625
A3	297	420	277	390	330	450
A4	210	297	180	277	240	330

A size chart illustrating the ISO A series and a comparison with American letter and legal formats.

ISO paper sizes (plus rounded inch values)

Format	A series		B series		C series
Size	mm × mm	in × in	mm × mm	in × in	mm × mm	in × in
0	841 × 1189	33.1 × 46.8	1000 × 1414	39.4 × 55.7	917 × 1297	36.1 × 51.1
1	594 × 841	23.4 × 33.1	707 × 1000	27.8 × 39.4	648 × 917	25.5 × 36.1
2	420 × 594	16.5 × 23.4	500 × 707	19.7 × 27.8	458 × 648	18.0 × 25.5
3	297 × 420	11.7 × 16.5	353 × 500	13.9 × 19.7	324 × 458	12.8 × 18.0
4	210 × 297	8.3 × 11.7	250 × 353	9.8 × 13.9	229 × 324	9.0 × 12.8
5	148 × 210	5.8 × 8.3	176 × 250	6.9 × 9.8	162 × 229	6.4 × 9.0
6	105 × 148	4.1 × 5.8	125 × 176	4.9 × 6.9	114 × 162	4.5 × 6.4
7	74 × 105	2.9 × 4.1	88 × 125	3.5 × 4.9	81 × 114	3.2 × 4.5
8	52 × 74	2.0 × 2.9	62 × 88	2.4 × 3.5	57 × 81	2.2 × 3.2
9	37 × 52	1.5 × 2.0	44 × 62	1.7 × 2.4	40 × 57	1.6 × 2.2
10	26 × 37	1.0 × 1.5	31 × 44	1.2 × 1.7	28 × 40	1.1 × 1.6

 ======

Paper Sizes www.metrication.com/drafting/paper.htm

The ISO 'A'series of sheet sizes is based on a constant width to length ratio of 1:2. 

The A0 size is defined as having an area of one square meter. This allows paper weights to be expressed in grams per square meter.

Each smaller sheet size is exactly half the area of the previous size. ie. If you cut an A0 sheet in half you get two A1 sheets; If you cut an A1 sheet in half you get two A2 sheets; and so on ...

 

This relationship of 1:2 is particularly important for reduction onto microfilm, or reduction and enlargement on photocopiers. All metric equipment including microfilm cameras, microfilm printers, photocopiers, and even drawing pen sizes, are designed around this ratio. This makes the process of archiving drawings, resizing, and modifying drawings easy.

 

 

Dimensions of Regular Sheets

Designation	Dimensions
A0	841 mm x 1189 mm
A1	594 mm x  841 mm
A2	420 mm x  594 mm
A3	297 mm x  420 mm
A4	210 mm x  297 mm
A5	149 mm x  210 mm

 

 

Oversize Sheets

Oversize sheets are used when it is desirable to give extra protection to the drawing sheets by providing a binding or trimming margin.

  Dimensions of Oversize Sheets

Designation	Dimensions
RA0	860 mm x 1220 mm
RA1	610 mm x  860 mm
RA2	430 mm x  610 mm
RA3	305 mm x  430 mm
RA4	215 mm x  305 mm
RA5	153 mm x  215 mm

  Rolls

The standard widths for rolls is 860 mm and 610 mm. The length of the drawing sheet can be cut as required to suit each individual drawing.

Серия сообщений "профессиональное":
Часть 1 - paper size standards
Часть 2 - font_size
Часть 3 - руководство по добавлению сообщений
...
Часть 31 - Без заголовка
Часть 32 - КАК НАУЧИТЬСЯ ПЕЧАТАТЬ «ВСЛЕПУЮ»
Часть 33 - возможности клавиатуры