Layout of drawings 1 BSI（图纸1 BSI的布局）.pdf

Layout of drawings 1 1.1 General This clause gives guidance on best practice in the layout of preprinted technical draw- ings, including those produced by computers. 1.2 Drawing sheets The ‘A’ series of drawing sheets, shown in Figure 1, is normally used. The drawing area and title block should be within a frame border. In general, material within the frame border forms part of any contract requirements. Figure 1: Relationship of A4 the ‘A’ sizes. A4 = 210 mm × 297 mm A3 A3 = 297 mm × 420 mm A2 = 420 mm × 594 mm A1 = 594 mm × 841 mm A0 = 841 mm × 1189 mm A2 The sides of all sheets are in the ratio 1:÷2. A0 is normally 1 m2 in area and forms the basis of the A1 series