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Technical drawing standards - AS 1100

posted 5 Sept 2013, 20:06 by scott.llamas@syd.catholic.edu.au [ updated 5 Sept 2013, 20:11]

All technical drawings must be drawn to a common standard so that all people in Australia and overseas can understand them. This standard is called Australian Standard 1100 (AS1100)

Technical drawings are based on a set of standards that have been globally agreed upon by

The Australian Standard AS 1100 provides the technical conventions for all Australian engineers,

architects, designers, surveyors and pattern makers to follow.

A-s1100 Drawing Standards Manual
Drawing Presentation Guidelines | Main Roads Western Australia
Engineering Drawings: Detail Drawings

Lines:

There are a number of different lines that you will be required to use in Technical Drawing. The table below shows you the different lines, describes where they are used and give you an example of each line.

AS1100.101- 1992 Australian Standard Technical Drawing. These resources are either available for free online through the RMIT Library or will be provided. Standard sized sheets as stated in AS1100. There are several drawing standards available both nationally and internationally.

Type of Line:	Use of line in Technical Drawing:	Example of lines:
Type A - Continuous, Thick	Visible outlines of the drawing.
Type B - Continuous, Thin	Dimension and projection lines, leaders. Hatching on sections.
Type C - Continuous, Thin (freehand)	Break in the object .
Type D - Continuous, Thin (ruled with zig-zag)	Break in the object (Straight)
Type E - Dashed, Thick	Hidden edges.
Type G - Chain, Thin	Center Lines of circles, arcs and center of objects.
Type H - Chain, Thick at each end and thin in the middle.	Cutting plane in sectioning of objects.

You cant actually access the AS1100 standards on the net unless a liscence has been purchased by a company/organisation. The standards can be purchased through a distributor, search 'Australian Standards' in google. I think that schools can apply for an exemption to gain access. Execute As1100 Drawing Standards Download in just a few clicks by using the instructions listed below: Select the template you want from the collection of legal form samples. Select the Get form key to open the document and begin editing. Fill out all of the necessary fields (they are marked in yellow). As1100 Drawing Standards Free Download AS 1100 is an Australian Standard for technical drawing including both mechanical and architecturaldesigns. AS 1100 standard drawings contain attributes that are universal around Australia. AS 1100.301-2008 AMDT 1. Technical drawing-Architectural drawing. AS 1100.301-2008 REC:2018. Technical drawing, Part 301: Architectural drawing. AS 1100.401-1984. Technical drawing, Part 401: Engineering survey and engineering survey design drawing.

Where two or more lines of different type coincide, the following order of priority should be observed:

A-s1100 Drawing Standards Manual

(a) Visible outlines and edges.

(b) Hidden outlines and edges.

(d) Centre-lines.

(e) Projection lines.

Views:

Selection of views shall be selected according to the following principles:

(a) To reduce the number of views required to fully delineate the information to be specified.

(b) To avoid the need for hidden outlines.

Drawing Presentation Guidelines | Main Roads Western Australia

Sectioned views:

Sectioning is used to show internal detail or to reduce the use of hidden detail lines that may make the object difficult to recognise. All hidden outlines in the section should be omitted except in special cases.

These types of drawings are Orthogonal's with imaginary lines cutting the object into parts.

Each sectional view or section shall be identified with its appropriate cutting plane, where identified, by inscribing a subtitle below the view or section; e.g. ‘SECTION A-A’, ‘SECTION B-B’.

Cutting planes are to shown using a 'Type H' line with the direction of viewing show by an arrowhead and a letter placed at the tail of the arrow. The cutting plane should pass through the main part of the object.

Hatching:

The cut part of the object is to be shown using with a hatched line (usually at 45°, unless this would make the object more difficult to understand). Where two or more adjacent parts have been sectioned the hatch line should be at different angles.

Angle of Hatching

Sectioning of Adjacent components

Where an object is symmetrical a part section can be used to assist in the clarity of the drawing.

If the object has a web support and the section plane passes along this then the web is not sectioned, although if the section plan passes through it then the web is sectioned (See image below).

Note: In section A-A passes along the web and therefore is not hatched in the side view, although in section B-B the plane passes thought the web and is shown in the bottom view.

Breaks:

Break maybe used to shorten lone objects and will use Type C or Type D lines.

Symbols:

The following symbols are to be used in dimensioning:

Symbol:	Use:
Diameter symbol, this is used to indicate the diameter of a circle.
R	Radius Symbol, this is used to indicate the radius of a circle or arc.
This symbol is used to refer to the object being identified is square and the same size across all surfaces.

Dimensioning, Projection and Leader Lines:

Objects that are drawn in Graphics often need to have dimensions showing the size and angles used to show detail about the component. Dimensions show the length and angle of items and the drawing should include only the measurements require to describe the object.

Projection lines are lines that extend from the object and extend outside the outline of the drawing where possible. These lines should start and extend past the dimension line.