Room Layouts (Leaving Cert Construction Studies): Revision Notes
Room Layouts
Door openings and clearances
Understanding proper door clearances is essential for creating accessible spaces. The effective clear width of a door opening depends on the type of door and how it operates.
For standard hinged doors, you need to consider both the door leaf and any door furniture when calculating clearances. Different door types require specific measurements:
- Doors opening outwards: The effective clear width runs from the door stop to the door ironmongery
- Doors opening inwards: The effective clear width runs from the door stop to the door leaf edge
- Sliding doors: The effective clear width runs from the door stop to the door leaf, with no reduction from ironmongery
Door furniture includes handles, push plates, and other hardware that can reduce the effective opening width. Always account for these elements when measuring clearances.
All door handles must be positioned between 800mm and 1200mm from floor level to ensure they can be reached comfortably by wheelchair users.
Internal circulation requirements
Creating smooth movement through internal spaces requires careful planning of corridors and doorway positioning.
Corridor specifications:
- Minimum width of 900mm allows wheelchair users to navigate comfortably
- Radiators and permanent fixtures cannot reduce corridor width below 800mm
- These fixtures must not be positioned directly opposite doorways
Door positioning and clearances:
- Minimum clearway of 400mm must be provided on both sides of door openings
- Door saddles cannot exceed 10mm in height to prevent tripping hazards
- Door handles should be positioned at 900mm height for optimal access
Common Mistake to Avoid: Never position radiators or permanent fixtures directly opposite doorways, as this creates navigation obstacles and can make doors difficult to use.
Kitchen accessibility features
Kitchens require additional considerations beyond standard accessibility rules because they are high-use spaces with specialised equipment.
Floor and movement requirements: The kitchen floor must have a non-slip surface to prevent accidents. A turning circle of at least 1500mm diameter is essential, though 1800mm is preferable for easier manoeuvrability.
Work surface and appliance positioning: Worktops and sinks cannot exceed 800mm in height, with 700mm being the recommended optimum height. Built-in appliances like dishwashers, washing machines and ovens should be installed beneath work surfaces to create a continuous workspace.
Space must be provided underneath work areas so wheelchair users can position their knees comfortably. This knee space is crucial for close approach to work surfaces.
Sockets and small appliances including kettles, toasters and microwaves must be positioned at accessible heights.
Kitchen layout principles: The sink, cooker and fridge should form a work triangle with a maximum distance of 1800mm between the cooker and sink. Workspace must be available on both sides of the cooker for safe food preparation.
Worked Example: Kitchen Work Triangle
Step 1: Position the three main elements
- Sink: Against the window wall
- Cooker: On the adjacent wall
- Fridge: Completing the triangle
Step 2: Measure distances
- Sink to cooker: 1600mm ✓
- Cooker to fridge: 1400mm ✓
- Fridge to sink: 1700mm ✓
All distances are within the 1800mm maximum requirement.
Kitchen tables work best when they are oval or circular in shape, as these designs are easier for people with mobility impairments to navigate around. Table height should not exceed 700mm.
Bathroom accessibility features
Bathrooms have specific safety requirements because they are used by one person at a time and involve water, which creates slip risks.
Basic safety requirements: Non-slip flooring is mandatory throughout the bathroom. The space requires a turning circle of at least 1500mm diameter for wheelchair access.
Fixture positioning and design: The wash-hand basin must be wall-mounted rather than pedestal-mounted. This leaves clear space underneath for wheelchair users to approach closely. Basin taps must be lever-operated rather than twist-operated, as levers are easier for people with reduced hand mobility to use.
Critical Safety Requirement: All bathroom floors must have non-slip surfaces. Water spillage is inevitable in bathrooms, making slip-resistant flooring essential for preventing accidents.
Toilet accessibility: A clear space measuring 750mm by 1200mm must be provided beside the toilet. This allows sufficient room for sideways transfer from a wheelchair to the toilet seat.
Grab rail requirements: Grab rails provide essential support and stability. These 600mm-long rails can be positioned vertically or horizontally at strategic locations around the bathroom. Horizontal grab rails work best when positioned 700mm above floor level.
A fold-up grab rail positioned 400mm from the toilet centre line provides additional grip and stability for toilet transfers.
Shower accessibility: Shower entry must be level with the bathroom floor to eliminate tripping hazards. A shower seat should be installed, and grab rails must be provided within the shower area. The shower-head should be adjustable in height to accommodate different users. Fabric shower curtains are recommended over glass screens for safety.
Adjustable shower heads should have a range from approximately 1200mm to 2000mm above floor level to accommodate both seated and standing users effectively.
Switches and sockets positioning
Electrical fittings must be positioned within comfortable reach ranges for wheelchair users throughout accessible buildings.
Main entrance equipment: Doorbells, intercoms, keyholes and similar equipment near the main entrance must be located between 900mm and 1200mm from floor level. This same height range applies to all light switches in accessible areas of the building.
Socket positioning: General-use sockets must be positioned between 400mm and 1200mm from floor level. However, specific-purpose sockets for appliances like cookers and washing machines that remain permanently connected do not need to follow these height restrictions.
The 400mm minimum height ensures sockets are not positioned too low, making them difficult to reach from a wheelchair, while the 1200mm maximum ensures they remain within comfortable reach.
Exception to Remember: Sockets for permanently connected appliances (cookers, washing machines, etc.) are exempt from the 400-1200mm height requirements, as they don't require regular access.
Remember!
Key Points to Remember:
- Door clearances: Minimum 800mm effective clear width with handles between 800-1200mm height
- Turning spaces: All accessible rooms need minimum 1500mm diameter turning circles
- Kitchen heights: Worktops maximum 800mm (optimum 700mm), with knee space underneath
- Bathroom safety: Non-slip floors, wall-mounted basins, lever taps, and grab rails at 700mm height
- Switch heights: 900-1200mm for entrance equipment and light switches, 400-1200mm for general sockets