c&g powerpoint fix a flight of quarter turn stairs

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Level 3 Diploma in Site Carpentry

Unit 306: Carry out first fix roofing and stairs

Fixing a flight of quarter-turn stairs



Aims•Understand how to fix a flight of quarter-turn stairs•Describe the components used to form quarter-turn stairs and balustrade•Explain how to install quarter-turn stairs•Describe the requirements of building regulations relating to stairs

Introduction



Source: Tim Taylor



Quarter-turn stairs

Quarter-turn stairs change direction by 90º to the left or right. This can be achieved via either a quarter-space landing or tapered steps.

Tapered steps, also termed winders, economise space because of the introduction of the extra steps in place of the landing. They can however be dangerous owing to the narrowness of the treads on the inside of the turn.

Quarter-space landing

Quarter-space of tapered stepsSource: BarkingDog



Half-turn stairs

These stairs turns through 180º, normally by way of a half-space landing:

Open-newel stairs: Also known as open-well stairs, are where two newels are used at landing level. This separates the string of the upper and lower flights, thus creating a central space or well.

Dog-leg stairs: The outer strings of the upper and lower flights are joined into the same newel immediately above each other. These stairs take their name from the appearance of its sectional elevation.

Source: BarkingDog

Open-newel stair

Dog-leg stair



Terminology

Vertical section through stairsVertical section of a landing

Source: BarkingDog



Terminology

Tapered treads are used to change direction. Easing pieces are addedto the strings to enable them to match up at the joint and this introduces the soft curve to the string.

Source: BarkingDog



Fitting tapered-tread stairs

Visit the following link to see the animation on how to assemble tapered treads:www.stairbox.com/staircase_help/how_to_fit_kite_winders.html



Geometrical stairs

Source: Tim Taylor



Geometrical stairs present a graceful, more aesthetic appearance.

Wreathed string stairs (curved) have an outer string and a handrail that are continuous from one flight to another throughout the entire stairway. As both the string and handrail rise to suit the stairs throughout the curve they are said to be ‘wreathed’. Although the use of newels is not essential, they are sometimes used at the top and bottom of a stair to support the scrolled handrail above.

Geometrical stairs



Types of bottom steps

RoundedSplayed

Source: BarkingDog



Approved Document K

Calculations for stairsAfter a site visit you have established that the storey height is 2.490m, with a limited going of 1.500m. Come up with a stairs design that will fit this specification and provide the information to the bench joiner for the rise and going to comply with current building regulations.



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c&g powerpoint fix a flight of quarter turn stairs

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