Damon Mcknight
Reading window sizes on house plans in Australia can be daunting, but it's not as complicated as it seems. A floor plan is a bird's-eye view of a space, showing the layout of rooms, placement of doors and windows, and furniture. Architects and builders have unique styles, but there's an overall industry standard. Floor plans include \dimension strings\ to locate windows, with measurements in metres. Window dimensions are four-digit numbers, with the first two digits indicating height and the second two indicating width. Abbreviations are used, e.g., 'obsc' for obscure glass and 'dp' for a downpipe. Drawings are usually protected under the Copyright Act of 1968. Understanding the scale, layout, and window sizes helps grasp the design.
| Characteristics | Values |
|---|---|
| Floor plan type | Floor plan, design drawing, working/construction drawing |
| Floor plan view | Bird's eye view of a space |
| Floor plan details | Layout of the rooms, placement of doors and windows, location of furniture and fixtures |
| Scale | 1:100 (1cm on the drawing = 100cm in real life) |
| Walls | Represented by solid lines |
| Doors | Represented by a lighter colour, with the width and height written on it |
| Windows | Drawn within the walls, indicated by three parallel lines, with the window size labelled on the window or a number |
| Window dimensions | Expressed in meters as four-digit numbers, with the first two digits referring to height and the second two to width |
| Window notations | 1209GL (1200mm high, 900mm wide glass louvre), 0618SW (600mm high, 1800mm long aluminium sliding window) |
| Abbreviations | 'obsc' (obscure glass), 'dp' (down pipe), 'mb' (metre box position) |
| Roof overhang | Shown using dotted lines around the outside of the house |
| Roof angle | Represented by dotted lines across the whole floor plan |
| Veneer wall | Diagonally lined border on the outside of the house with a black line underneath (denotes a brick veneer wall) |
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What You'll Learn
- Window dimensions: Window dimensions are in metres and are expressed as four-digit numbers
- Abbreviations: Building plans use abbreviations like 'obsc' for obscure glass and 'dp' for downpipe
- Scale: Floor plans are drawn to scale, usually 1:100, with each centimetre on the plan representing 1 metre in real life
- Visual elements: Walls are the strongest visual elements in a floor plan and are represented by parallel lines
- Window schedule: The window schedule details the sizes, height and type of window and glass to be used
Window dimensions: Window dimensions are in metres and are expressed as four-digit numbers
Window dimensions are a critical aspect of house plans in Australia, influencing both aesthetics and functionality. Standard window dimensions in Australia are typically expressed in metres, with specific measurements depending on the type of window and the room it is intended for.
For instance, the standard dimensions of a sliding window, the most common type in Australia, range from 0.6 metres by 2.1 metres to 0.61 metres by 2.65 metres. These windows are designed to fit into pre-existing openings, and custom options are available for unique window openings.
Double-hung windows, another popular type in Australia, typically range in size from 0.944 metres by 0.61 metres to 2.1 metres by 2.65 metres. Full-height windows, which can add a sense of grandeur to a room, generally span the width of the room and measure between 2.4 and 3 metres in height, positioned about 3 feet from the floor and 18 inches from the ceiling.
It is important to consider the placement of windows for optimal light and views. Standard window sizes in Australia offer a range of options to suit privacy needs, design aesthetics, and energy efficiency. For example, awning windows with a hinge at the top that opens from the bottom are popular in areas with wet weather as they block rain while allowing ventilation.
When reading window sizes on house plans, dimensions are typically provided as four-digit numbers, with the first two digits indicating the width and the last two digits representing the height of the window in metres. These "dimension strings" are drawn parallel to the element, with 45-degree hash marks indicating the start and end points of the measurement.
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Abbreviations: Building plans use abbreviations like 'obsc' for obscure glass and 'dp' for downpipe
Building plans, including floor plans, use a variety of abbreviations to save time and space. According to Australian Standard AS1100.101-1992 Technical drawings, Section 1.4, and AS1100.103-2008, Sections 2.8 to 2.9, the use of abbreviations helps avoid the confusion caused by inconsistencies. For example, cast steel is abbreviated as "CS" to simplify the jargon and save time and space.
Floor plans use abbreviations like "obsc" for obscure glass and "dp" for downpipe. These plans are typically drawn to a 1:100 scale, with one centimetre on the plan representing one metre, or one millimetre equivalent to 10 centimetres.
Floor plans can be design drawings or working drawings (also called construction drawings). Design drawings are created to communicate a home design to non-professionals and include a modest amount of information. Working drawings, on the other hand, contain much more detail and are used by builders to construct the home.
Dimension strings are used in more detailed floor plans to locate windows, doors, walls, and other architectural elements. These are drawn parallel to the element with 45-degree hash marks at each end, indicating the start and end of the measurement. Architects may also include furniture in the floor plans to help visualise the space.
While architects and builders may have their unique styles of presenting plans, there is an industry standard. Once you can read one plan, you should be able to understand them all.
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Scale: Floor plans are drawn to scale, usually 1:100, with each centimetre on the plan representing 1 metre in real life
Floor plans are typically drawn to scale, with the most common scale being 1:100, meaning that each centimetre on the plan represents one metre in real life. This scale is usually indicated on the plan itself, often in the bottom or top right-hand corner, in what is called the "title block". This scale is important as it allows you to understand the size and dimensions of each room and element within the house plan.
The scale is essential in providing context to the plan and allowing you to visualise the actual size of the rooms and spaces. For example, with a 1:100 scale, you can understand that a room measured at 5cm x 4cm on the plan will be 5m x 4m in reality. This helps you to gauge the size of the rooms and whether they will suit your needs and intended purposes.
The scale also helps to determine the size and placement of windows. Windows are often illustrated using unfilled blocks along the walls, and their size and position can be measured using the scale. Windows may also have a "`callout`" on the diagram, providing specific details about their intended design and function.
In addition to the scale, floor plans use various symbols and conventions to represent different elements. For example, walls are typically represented by parallel lines, with exterior walls being thicker than interior walls. Doors are also indicated, showing their handing (the side the handle will be on) and whether they slide or swing open.
By understanding the scale and these standard symbols, you can effectively read a floor plan and visualise the size and layout of the rooms, windows, doors, and other features of the house.
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Visual elements: Walls are the strongest visual elements in a floor plan and are represented by parallel lines
When reading house plans, it's important to understand the visual language used to represent the various elements of a building's structure and design. Walls are fundamental components of any floor plan and play a crucial role in defining the layout and overall integrity of the building.
In a floor plan, walls are typically represented by parallel lines. These lines may be solid or filled with a pattern, indicating the type of wall or construction material used. For instance, thicker black or dark lines often represent exterior walls, while thinner lines are usually used for interior walls. However, it's important to note that this thickness distinction may vary depending on the specific plan and the designer's preferences.
Breaks or gaps in the parallel lines representing walls indicate openings such as doors, windows, or passages between rooms. Windows, for example, are often depicted as thin rectangles within the wall, with additional lines indicating the window design, such as sliding or swinging casement windows. Doors may also be represented as thin rectangles, with or without an arc to show the swing direction.
The placement and arrangement of walls in a floor plan are crucial for understanding the overall flow and functionality of the space. They define the boundaries of rooms, create partitions, and influence the movement of people within the building. Additionally, walls are integral to the structural integrity of the building, especially bearing walls, which are designed to transfer loads and are an essential part of the building's foundation.
While reading window sizes on house plans, it's important to pay attention to the symbols and notations used. Windows are typically identified by their location and type, with standard symbols representing elements like sliding windows, casement windows, and bay windows. Dimension strings, drawn parallel to the element with 45-degree hash marks at each end, provide specific measurements for the window's size. These dimensions help ensure that the windows align with the walls and overall structure, providing an accurate representation of the building's design.
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Window schedule: The window schedule details the sizes, height and type of window and glass to be used
A window schedule is an integral part of any house plan, detailing the sizes, heights, and types of windows and glass to be used. It is a comprehensive guide that ensures the correct windows are ordered and installed in the right locations. Here is a breakdown of the critical aspects covered in a window schedule:
Window Sizes and Heights:
The window schedule specifies the exact dimensions of each window, including width and height. Standard window sizes are typically available in set dimensions that fit most newly built homes. Window sizes are measured in feet and inches, with the width specified first, followed by the height. For example, a window labelled as 2438 is 2 feet 4 inches wide and 3 feet 8 inches tall.
Window Types:
The schedule also identifies the type of window required for each opening. Different types of windows include double-hung windows, sliding windows, picture windows, and casement windows. Each type has its own standard sizes, and the window schedule ensures the appropriate type is selected based on the specific requirements of the house design.
Glass Specifications:
In addition to window sizes and types, the window schedule outlines the glass specifications, including the type of glass, any special coatings or treatments, and energy-efficiency considerations. This is particularly important for fixed panes of glass in picture windows, where energy efficiency is a key concern.
Installation Details:
The window schedule may also include installation details, such as whether the windows are new construction or replacement windows. New construction windows come with nail fins to secure them to the rough opening frame, while replacement windows are installed within an existing frame.
Standard vs. Custom Sizes:
The window schedule clarifies whether standard or custom window sizes are required. Standard window sizes are commonly used and can be more affordable, but custom sizes may be necessary in certain situations, such as when replacing windows in an older home with non-standard frame sizes.
By providing a detailed overview of the windows required for a house plan, the window schedule ensures accuracy in ordering, installation, and overall design aesthetics. It is a critical reference tool for builders, architects, and homeowners alike.
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Frequently asked questions
Window sizes are expressed in metres and written as four-digit numbers. The first two digits refer to the height of the window, and the last two digits refer to the width. For example, a 1209GL window indicates a 1200mm high and 900mm wide glass louvre window.
You may come across “design drawings," which are meant to communicate the home design to non-professionals, and "working drawings" or "construction drawings," which contain more detailed information for builders. Construction floor plans are typically drawn to a 1:100 scale, where 1 centimetre on the plan represents 1 metre.
Windows are typically drawn within the walls on the floor plan and are indicated by three parallel lines. They may have the window size labelled on them or a number that corresponds to a window schedule, which provides detailed information about the window's size, height, type, and glass used.
