One number does most of the work: 70.7%. That is the reduction that takes any ISO A-size sheet down to the next one — A1 to A2, A2 to A3, A3 to A4. Enlarging the other way is 141.4%. Every other figure on this page falls out of those two. Below are the ratios for ISO sheet sizes and for changing drawing scales — a useful list to keep near the plotter. Why … [Read more...] about Reduction Ratios: A-Series and Scale Change Chart
Drafting Standards
CAD Line Weights & Pen Colours: The Real ISO Chart
Complied by YZ. Color your judgment In a CAD system, colours are most commonly used to represent line weights. Selecting different colours is just like picking up pens with varying line thickness. We then tie these colours into layers to control the visibility of drawing components. There are no right and wrong colouring systems — but there are some that have … [Read more...] about CAD Line Weights & Pen Colours: The Real ISO Chart
Revit & Drafting Tutorial – Revision Clouding
https://youtu.be/2n5UoRRScZc In this video tutorial we talk about Rev Clouds. What are they? When do you use them in architectural and engineering drafting? And how to do it with Revit CAD/BIM software. … [Read more...] about Revit & Drafting Tutorial – Revision Clouding
Paper Sizes Chart: ANSI, ARCH & ISO A (Free Printable PDF)
Free printable chart: every ANSI, Architectural and ISO A sheet size on one A4 page, in inches and millimetres — download the Drawing Sheet Sizes reference chart (PDF). Print it and pin it above the desk. North America runs two separate series of drawing sheet sizes, and they use the same letters. ANSI A to E are the engineering sizes built up from Letter paper. Arch A … [Read more...] about Paper Sizes Chart: ANSI, ARCH & ISO A (Free Printable PDF)
Structural Slab Joints: Types, Abbreviations, Drafting
Concrete moves. It shrinks as it cures, it expands and contracts with temperature, and different parts of a structure settle by different amounts. A slab joint is where you decide that movement will happen, instead of letting the concrete decide by cracking somewhere you did not want. This covers the joint types you will be asked to draw, what each one is for, and the … [Read more...] about Structural Slab Joints: Types, Abbreviations, Drafting
Folder Setup for a Large Project
For a project to be successful it requires a good folder directory structure. One which is quick and simple to use, yet files things in an orderly way, so we have information at our finger tips. That means we can find things quickly, and not lose things! In this video we discuss a folder setup on an actual structural drafting project for a large building. We also articulate the … [Read more...] about Folder Setup for a Large Project