Folding technical drawings

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Folding large format technical drawings

 

There are basically two ways to handle large format drawings: roll them or fold them. Folding has a number of advantages:

There is a catch: you need to fold the drawings correctly. The folding procedure that I present here conforms to the DIN 824 standard, based an "A" paper sizes. Each page folds to A4. I present only how to fold A3, A2 and A1 (we currently do not use larger paper sizes in our company, so I have no experience with them).

DIN 824 only specifies dimensions, of which there are quite a few. The advantage of my stepwise procedure is that you only need to remember three dimensions: the size of A4 format, being 210 × 297 mm, and the width of many folded sections, which is 190 mm. These values are not very critical, if you remember A4 as 21 by 30 cm, that will be fine. In the drawings, you often see the doubled values: I measure 380 mm to create a folded section of 190 mm, but I think it is self-explanitory.

Real paper for technical drawings is typically white on both sides, but to better present the folding, I pretend to use paper that is white on top and yellow on the bottom side.

A3

A2

A1

Oversized paper

When handling oversized paper, sometimes called A3+, A2+ and A1+, the easiest way out is to fold them to oversized A4. If that is not acceptable, as a first step, fold away the right or top margin of the drawing, to approximate the width/height of A3, A2 or A1. For A3+ and A1+, you only have to fold the top margin (to approximate the height of A3 and A1 respectively); there is no need to also fold the right margin for A3+ and A1+. Likewise, for A2+ you only fold the right margin; you do not need to also fold the top margin.

For example, when folding A2+ with a size of 610 × 430 mm (instead of 594 × 420 mm), fold roughly 15 mm of the right edge of the drawing, so that the new size becomes 595 × 430 mm. Then proceed with the standard way to fold A2.