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How to fold a technical drawing

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by Shawn Muscat on 20 August 2013

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Transcript of How to fold a technical drawing

How to fold an A1 technical drawing
The intent of folding large architectural or engineering drawings is to allow the lower portion of the title block to be visible without having to open the entire sheet. This allows a stack of drawings to be filed and then easily identified by the sheet number and drawing title.
Step 1: Fold the drawing in half so that the content is concealed inside the fold.
Step 2: Fold the top leaf back over itself, which will be 1/4 of the original width.
Step 3: Fold the bottom leaf back under the top leaves. You now have an accordion folded sheet that is 1/4 the width of the full sheet and full height.
Step 4: Fold the top half of the sheet under the bottom half
Paper Sizes
European Paper sizes - most often used for architecture and interior design A0 - A4
Paper Types for Technical Drawing
Tracing Paper

Used normally for drafting. Comes in thickness from 90gsm to over 120gsm. The thicker (higher number) allows easier pencil and pen use, creases less easily, and allows pen line to be scratched out.

The drafting process involves a fist sheet being using for base lines, with furthersheets being taped down over the top, to allow tracing to be made, omitting obsolete lines from the earlier drawing. Afinal drawing may be prepared from 2-3underlays. This is the process which has been made obsolete by the use of CAD.
Layout Paper

For the base drawing, to be used as an underlay, layout paper, which is semi- opaque, can be used.

Pros: it is inexpensive and comes in pads, A5 sized up to A1. ( Over A3 sized can only be purchased in specialist art or drafting shops).

Cons: its near-opacity makes it harder to trace through: fine pen line can 'bleed ' : it's surface does not allow ink lines to be scratched out.
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