Three-Quarter Turn Straight Stairs

Side elevation illustration of a woman climbing a set of Three-Quarter-Turn Stairs

Three-Quarter Turn Stairs change their directions through 270° by the time the stair reaches the next floor. The direction is changed three times through three right angles, with the upper flight crossing the bottom one. In this type of construction, an open well is formed. This type of stair is normally used when a space has a greater vertical distance but a limited length. Some flights have very few risers, and the landings can provide a place to stop and rest during ascension.

Dimensioned plan and elevation drawings of Three-Quarter-Turn Stairs measuring height and width

What are the main parts of a stair?

The main parts of a stair include the treads, which are the horizontal surfaces that you step on, the risers, which are the vertical surfaces between the treads, the stringers, which are the structural support for the treads and risers, and the handrail, which is a safety feature that provides a hand grip for people using the stairs.

How can accidents be avoided on stairs?

To prevent accidents on stairs, keep them clean and clutter-free, well-lit, and equipped with handrails. Wear non-slip shoes and hold the handrail while using the stairs. Be careful when carrying objects and repair any damaged steps.

When were stairs invented?

It is difficult to determine the exact date when stairs were invented, as they were likely developed independently in different parts of the world at different times. However, the oldest known stairs were discovered in the ancient city of Ur in modern-day Iraq, and are believed to date back to the early 4th millennium BCE. These stairs were made of brick and were used to provide access to the city's ziggurat, a large pyramid-shaped temple.

What are the main parts of a stair?

How can accidents be avoided on stairs?

When were stairs invented?

Where are straight stairs typically used?

Straight stairs are the most common type of stairs and can be found in a wide range of buildings, including homes, offices, schools, and public buildings. They are simple, efficient, and easy to use, making them suitable for most purposes. They are often used in situations where there is sufficient space and where the stairs do not need to change direction or follow a specific layout.

Why aren't spiral stairs more common?

Spiral stairs are circular stairs that are compact and space-efficient, but they have some limitations that make them less common than other types of stairs. One of the main reasons why spiral stairs are not more common is that they can be more difficult to navigate, especially for people with mobility issues or for those carrying large objects. Spiral stairs also have a more limited capacity compared to straight or L-shaped stairs, as they are typically narrower and have less space for multiple users to pass each other.

When should winder stairs be used?

Winder stairs are stairs that have treads that are narrower on one side than the other, allowing the stairs to turn a corner while using a smaller footprint. These stairs are often used in situations where space is limited, or where the layout of the building requires the stairs to change direction. Winder stairs can be more efficient than L-shaped stairs in terms of space usage, as they allow the stairs to follow a more compact path. However, winder stairs can be more difficult to navigate.

Where are straight stairs typically used?

Why aren't spiral stairs more common?

When should winder stairs be used?

Perspective view of a 3D model of Three-Quarter Turn Straight Stairs

Details

Under Development

Height:

Width:

Depth:

Length:

Weight:

Area:

Properties

Drawings include:
Three-Quarter-Turn Stairs side elevation, side (person), front, plan

Links

Wikipedia - Stairways

Related Collections

Related Tags

2D Downloads

For 2D Downloads of this element, upgrade to a Dimensions Pro Membership. Available in DWG (CAD, Imperial & Metric), SVG, JPG formats

3D Downloads

For 3D Downloads of this element, upgrade to a Dimensions Pro Membership. Available in 3DM (Rhino), OBJ (NURB), SKP (Sketchup) formats

Ad Blocker

Enjoy free drawings? We do too!
Advertising helps fund our work.
Please support the project by disabling
or whitelisting your ad blocker while browsing Dimensions.Guide. Thanks!