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A short class with Sarah and her students. The other ways are under More.
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Today, we're exploring the dog-legged staircase design. This staircase typically has two straight runs with a landing in between. Does anyone know why this design is popular in buildings?
Maybe because it saves space?
Exactly! The dog-legged design maximizes space efficiency. Can you remember the standard tread and riser dimensions we use?
I recall the tread is 300mm, and the riser is 150mm.
Very good! Now, let's recap the overall dimensions of the staircase we need. Can anyone remind me of those?
The dimensions are 3m by 5.5m with a vertical height of 3.3m.
Correct! This information is essential for our drawings. Remember: DRAWS for Dimensions, Riser, and Width of Stair.
To summarize, the dog-legged staircase features specific dimensions and is chosen for its space efficiency in buildings.
Next, let’s shift our focus to the open well staircase. Can anyone explain what an open well is in this context?
Isn't it like a rectangular opening in the middle of the staircase?
That's right! The open well allows for more light and air. How are its dimensions different from the dog-legged staircase?
It has dimensions of 4.5m by 5.4m and a height of 3.6m.
You've got it! And what about the materials used? What’s the thickness of the waist slab?
It's 150mm, just like the others.
Excellent! Reinforcement details like main steel 12ϕ@150 c/c are also crucial. Remember: LIGHT for Light, Internal dimensions, and Guides the layout.
Summary: Open well staircases feature greater dimensions and provide enhanced lighting as a design element. Keep these details in mind when planning.
Let's discuss the reinforcement techniques for both staircase types. Why is reinforcement vital?
To ensure the strength and stability of the staircase!
Exactly! For our dog-legged staircase, we use main steel of 10ϕ@125 c/c spacing. What about for the open well staircase?
It uses 12ϕ@150 c/c spacing!
Correct! Why do you think different diameters or spacing might be used?
It could be because of the different loads or designs on the two types.
Yes, perfectly said! Remember: STRENGTH for Spacing, Type, Reinforcement, and Effective load management.
In summary, reinforcement varies based on the design requirements, and each design needs to consider its specific load and dimensions.
In a dog legged shape, the stairs bend tight, with treads and risers helping us take flight.
Once there was a building with a dog legged staircase, where each step up was a race, but also an open space awaited on high, filled with light, far and nigh.
TREAD for Tread, Riser, Efficiency, And Design.
RAMP for Riser, And multiple Meters on the Plan.
Term
What is a dog legged staircase?
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Height of the open well staircase?
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What are the typical dimensions for a tread?
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What metal is used for staircase reinforcement?
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A staircase with two straight flights connected by a landing, forming an L-shape.
A staircase design featuring an open space in the middle, allowing for light and ventilation.
Steel bars or mesh used to strengthen concrete.
The vertical distance between two consecutive treads.
The horizontal part of the stair on which one steps.
This section focuses on the design and drawing of two types of staircases: dog-legged and open-well, along with required measurements and specifications.
The section covers the essential techniques for drawing a dog-legged and an open-well staircase, detailing specific measurements, design requirements, and reinforcement details for each type of staircase relevant to building planning.
This section discusses two distinct types of staircases used in architecture: the dog-legged and open-well staircases. It outlines the design principles and specific measurements necessary for constructing these staircases in a reinforced concrete context.
Dog Legged Staircase: This type is characterized by its L-shape and is commonly used in residential and office buildings. The design focuses on two straight runs of steps connected by a landing.
Open Well Staircase: This staircase features an open well design, allowing more light and air. It can have various forms but typically incorporates a rectangular well.
The section is critical as it provides HVAC engineers with the knowledge to create functional and safe staircases in their designs.