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24 Architect’s Pocket Book Paper sizes International paper sizes The basis of the international series is a rectangle having an area of one square metre (A0), the sides of which are in the proportion of 1 : 2. This is the proportion of the side and diagonal of any square. All the A series are of this proportion, enabling them to be doubled or halved and remain in the same proportion, which is useful for photographic enlargement or reduction. A0 is twice A1 which is twice A2 and so on. Where larger sizes than A0 are needed the A is preceded by a figure, thus 4A is four times A0. The B series are sizes intermediate between any two A sizes. This series is used mostly for posters and charts. The C series are envelopes to suit the A sizes. DL or long sizes are obtained by dividing the A and B series into three, four or eight equal parts parallel to the shorter side so that the proportion of 1 : 2 is not maintained. In practice, the long sizes should be produced from the A series only. The dimensions of these series are of the trimmed or finished size. mm inches mm inches A0 841 1189 33 1 /8 46¾ B0 1000 1414 39 3 /8 55 5 / 8 A1 594 841 23 3 /8 33 1 /8 B1 707 1000 27 7 / 8 39 3 /8 A2 420 594 16½ 23 3 /8 B2 500 707 19 5 / 8 27 7 / 8 A3 297 420 11¾ 16½ B3 353 500 13 7 / 8 19 5 / 8 A4 210 297 8¼ 11¾ B4 250 353 9 7 / 8 13 7 / 8 A5 148 210 5 7 / 8 8¼ B5 176 250 6 15 /16 9 7 / 8 A6 105 148 4 1 /8 5 7 / 8 B6 125 176 4 15 /16 6 15 /16 A7 74 105 2 7 / 8 4 1 /8 B7 88 125 3½ 4 15 /16 A8 52 74 2 1 /16 2 7 / 8 B8 62 88 2 7 /16 3½ A9 37 52 1 7 /16 2 1 /16 B9 44 62 1¾ 2 7 /16 A10 26 37 1 1 /16 1 7 /16 B10 31 44 1¼ 1¾ CH001.indd 24 2/29/08 12:18:23 PM
General Information 25 mm inches C0 917 1297 36 1 /8 50 3 /8 C1 648 917 25½ 36 1 /8 C2 458 648 18 25½ C3 324 458 12¾ 18 C4 229 324 9 12¾ C5 162 229 6 3 /8 9 C6 114 162 4½ 6 3 /8 C7 81 114 3 3 /16 4½ DL 110 220 4 3 /8 8 5 / 8 Source: Whitaker’s Almanack Paper sizes – A series CH001.indd 25 2/29/08 12:18:23 PM
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Page 3 and 4: General Information 3 Temperature -
Page 5 and 6: General Information 5 Rain - wind d
Page 7 and 8: General Information 7 Sea areas, in
Page 9 and 10: General Information 9 SI Derived un
Page 11 and 12: General Information 11 Temperature
Page 13 and 14: General Information 13 Weight ton
Page 15 and 16: General Information 15 Imperial to
Page 17 and 18: General Information 17 Greek alphab
Page 19 and 20: General Information 19 Nine regular
Page 21 and 22: General Information 21 The Kepler-P
Page 23: General Information 23 The Fibonacc
Page 27 and 28: General Information 27 Imperial pap
Page 29 and 30: General Information 29 Drawing conv
Page 31 and 32: General Information 31 Masonry Timb
Page 33 and 34: General Information 33 Perspective
Page 35 and 36: General Information 35 The classifi
Page 37 and 38: General Information 37 8 Residentia
Page 39 and 40: General Information 39 Table 2 Cons
Page 41 and 42: General Information 41 Uniclass CI/

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