Approved Document K Flashcards
What is Requirement K1?
K1 ensures that stairs, ladders, and ramps are designed safely to prevent falls and provide secure access.
What is the maximum rise for a single step in a flight of stairs?
220mm in dwellings; 190mm in public buildings for accessibility.
What is the minimum going depth for stairs?
220mm in dwellings; 250mm in public buildings for safer footing.
What is the maximum pitch for a stair flight?
42° for private stairs; 38° for public access stairs.
How many steps can a single stair flight have before requiring a landing?
No more than 12 steps in public buildings; up to 16 in dwellings.
What is the required headroom for staircases?
At least 2.0m measured vertically from the pitch line.
What is the minimum width for staircases in dwellings?
At least 800mm, but 900mm is recommended for better accessibility.
What is the required handrail height for stairs?
Between 900mm and 1100mm measured from the pitch line.
When are handrails required on stairs?
On at least one side for stairs with two or more risers; both sides in public buildings.
What are the requirements for stair nosings?
They must be clearly visible, slip-resistant, and have a rounded or chamfered edge.
What is the maximum gap allowed between stair balusters?
No more than 100mm to prevent small children from passing through.
What is the minimum ramp width for accessibility?
At least 1.5m for ramps in public buildings; 900mm for private dwellings.
What is the maximum gradient for a ramp?
1:12 for short ramps (up to 2m); 1:15 for longer ramps.
How long can a ramp be before requiring a landing?
No more than 10m without an intermediate landing.
What is the minimum landing length for a ramp?
At least 1.2m at the top and bottom of each ramp segment.
What is the purpose of tactile paving at stairs and ramps?
To alert visually impaired users to changes in level.
What are the slip resistance requirements for stair treads and ramps?
They must be constructed from slip-resistant materials suitable for their intended use.
What are the handrail requirements for ramps?
Handrails must be continuous, easy to grip, and positioned at a height of 900mm to 1000mm.
What are the additional stair requirements for external access?
They must be slip-resistant, have adequate drainage, and provide lighting for visibility.
What is the required contrast level for stair edges?
A minimum of 30% luminance contrast to improve visibility.
What additional requirements apply to fire escape stairs?
They must have non-slip treads, handrails on both sides, and a direct route to safety.
What is the required depth for stair nosings?
At least 55mm deep to ensure safe foot placement.
What are the landing requirements for external ramps?
They must be level, slip-resistant, and at least 1.2m in length.
What additional considerations apply to stairs in buildings used by the public?
They must accommodate high foot traffic, have clear signage, and provide handrails on both sides.