Skip to content

Unit: Work documents

LMFGN3001B: Read and interpret work documents

Section 1: Working drawings

Key information on plans


Image for slide 1
Audio for slide 1 (mp3 |6|KB)
Plans provide a graphic representation of a building or object, together with basic information on dimensions, components and structural details.

We've looked briefly at the graphic elements in the previous lesson, so now let's turn to the other items of information shown on a plan.

hearing icon
Image for slide 2
Audio for slide 2 (mp3 |6|KB)

Title block

The title block is generally at the bottom of the page on the right hand side.

It contains the title of the drawing, name of the client, name of the architect, builder or contracting company who drew it, date it was drawn, scale and version number.

The architect or builder may also add other information, such as their company logo, spaces for people's signatures and copyright details.

hearing icon
Image for slide 3
Audio for slide 3 (mp3 |6|KB)

Scale

The scale of the drawing refers to the ratio used to reduce the size of the real-life building or object down to a size that can be drawn conveniently on a piece of paper.

Most building plans are printed onto A3 paper, so a scale of 1:100 is generally used for floor plans.

This means that every 1 mm on the plan represents 100 mm on the full-sized object.

hearing icon
Image for slide 4
Audio for slide 4 (mp3 |6|KB)

However, other scales are typically used for different types of drawings.

Below are the most common scales used for A3 plans.

If you're not sure about how these ratios work or how they are used in plans, go to 'Understanding measurements' in the unit: Planning and costing. There is also more information on the metric system in the unit: Making measurements.

hearing icon

      Site plan: 1:200 (or 1:500 if the block is large)

      Floor plan: 1:100, 1:50

      Elevations: 1:100, 1:50, 1:20

      Sections: 1:100 (or less, such as 1:50 or 1:20, if close-up details are shown)

      Detail drawings: 1:10, 1:5, 1:2 1:1 (full size)

Image for slide 5
Audio for slide 5 (mp3 |6|KB)

Dimensions

All dimensions in building plans are shown in millimetres (mm).

Although floor layers have used centimetres (cm) in their own floor covering plans until recently, the new Australian Standard for resilient floor coverings (AS 1884-2012) now specifies that these plans must also be drawn in mm.

hearing icon
Image for slide 6
Audio for slide 6 (mp3 |6|KB)

Legend

Plans use lots of abbreviations and symbols to indicate particular features.

Obvious features - such as windows, doors, wardrobes and bathroom fixtures - are shown using standardised symbols, which generally don't need any explanation in a legend.

However, industrial plans and complex buildings often have specialised or unusual inclusions.

To avoid cluttering up the drawing with terms or phrases written out in full, the symbols and abbreviations used are explained in a legend to one side of the drawing.

Below are some of the more common abbreviations that might appear in a legend.

hearing icon
Image for slide 7
Audio for slide 7 (mp3 |6|KB)

Finishing Schedule

In commercial projects, it's common for rooms to have similar layouts and products installed, but with different finishes or colours.

In these cases, a 'Finishing schedule' will let you know which colour goes where.

hearing icon
Image for slide 8
Audio for slide 8 (mp3 |6|KB)

Drawing number

The drawing number is a reference number used by the architect or builder to distinguish the project and working drawing being shown.

Sometimes the version control is built into the drawing number, such as '.1' on the end of the number to indicate Version 1.

However, it's more common to have a separate version control number or date in a separate box in the title block.

hearing icon
Image for slide 9
Audio for slide 9 (mp3 |6|KB)

Always make sure you're referring to the most recent version of a plan unless you've been instructed otherwise.

Sometimes clients change their mind about certain details, or discover that particular materials are not available or the council has imposed new conditions on the project.

You don't want to end up completing an installation only to find out that the specifications had changed before you started and you weren't aware of it!

hearing icon


Learning activity

Audio 10 (mp3 |6|KB)

Below is an excerpt from the floor plan we looked at in the lesson: Building plans.

See if you can name all the items that are shown in an abbreviated form. Try to do it without referring to the abbreviation list on the previous page. Then check your answers against the list.

hearing icon

Abbreviations

FWR
SWC
WMWR
CTCPT