Google+

How to produce top quality technical drawings – it’s as easy as ‘A-B-C’

Most of us know a badly drafted plan when we see one: when you’re quoting a project (and pushing deadlines, too), a poor set of plans can be a major inconvenience and an estimator’s nightmare! Worse still when you’re at building or manufacturing stage, and an unclear section or inconsistent dimensioning is costing you time and money…

When you’re ‘on the other side’ and preparing your plans, how do you make sure your technical drawings are top quality without blowing out your time and budget on documentation?

Here’s a simple ‘A-B-C’ method that will help keep your drawings in check:

A for Australian Standards

Australian Standards are published documents that set out specifications and procedures to ensure products, services and systems are safe, reliable and consistent. While they are not necessarily legally binding (unless called into legislation by Government), Australian Standards are an excellent reference point for businesses looking to incorporate quality control in their practice.

The Australian Standards most applicable to architectural drafting are:

AS 1100.101-1992 (R2014) Technical Drawing General Principles

This Standard sets out the basic principles of technical drawing practice, including:

  • common abbreviations
  • sizes and layout of drawing sheets
  • types and thicknesses of lines to be used, with examples of their application
  • requirements for distinct uniform letters, numerals and symbols
  • recommended scales and their applications
  • methods of projection and indication of various views (elevations etc)
  • methods of indicating sections, and conventions used in sectioning details
  • recommendations for dimensioning including size and geometry tolerances
  • conventions used for the representation of components and repetitive features of components

 

If you’re looking for consistency in the technical drawings you produce, using this Standard as a starting point for a quality control checklist will make sure you’re on the right track.
AS 1100.301-2008 Technical Drawing Architectural Drawing

This Standard sets out requirements and recommendations for architectural drawing practice. It’s complementary to AS 1100.101, and indicates methods of presenting drawings of architectural work, before, during and after the construction period. It includes information on abbreviations (additional to those in AS 1100.101), the layout of drawing sheets, line conventions and conventions for the cross-referencing of drawings, coordinates and grids.

Check your local library for copies of these standards, or visit www.saiglobal.com for more information.

B for Brevity

Many designers and drafties think their intentions will be made clearer by filling their orthographic drawings with notes, but this is not always the case.

Applying the ‘KISS’ theory (keep it simple, stupid!) to your drawing practice will make for easy-to-read, uncluttered documentation. Consider the following when aiming for brevity:

·      Be consistent with your layouts, linework, dimensioning, abbreviations and symbols (using Australian Standards and your quality control checklist). Avoid large blocks of notes, and embrace white space!

·      Include a legend to explain and/or confirm the meaning of abbreviations and symbols.

·      Back up your plan set up with a comprehensive specification (set out in table format) and an accurate 3D rendering, and you’ll ensure everyone is on the same page, with all the information they’ll need.

C for Clarity

Technical drawing is a method of communication – think of it as a language that everyone should be able to understand.

By adhering to the guidelines set out in AS 1100, and ensuring you (and your team) deliver consistent plans every time, you’ll be more likely to be understood, and less likely to have to explain your intentions over and over again. To ensure your drawing set comes together in a way that can be clearly comprehended:

·      Plan your drawing set in advance (floor plan, elevations, mechanical/structural plans, sections and 3D renderings). Lead the reader through the set of drawings with clearly set out call-outs (symbols) and references.

·      Plan each individual drawing before getting in to the detail, making sure the layout is clear and logical – don’t be afraid of white space!

·      Consider how the reader will be viewing your plans: will they print them out (A4? A3? A0?) or view them on a big screen monitor or an on-site iPad? Can your drawings be easily read when reduced or enlarged?

The level of flexibility that your software allows will naturally impact upon the above. A quality CAD system like PYTHA will allow you to adjust your setouts and linework and conform with Australian Standards, ensuring the technical drawings you produce are top quality, every time.

Want to learn more? Contact Pytha Partners today.

Submit a Comment

Your email address will not be published. Required fields are marked *