Which stair type is most suitable for limited space?

Question

Question

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RRB JE CBT 2 (Civil Engineering) ReExam Official Paper (Held On: 04 Jun, 2025)

Answer 1

Explanation:

Spiral staircases are built around a central pole and rotate in a circular or helical form, consuming minimal horizontal space. This makes them ideal for tight areas where a conventional staircase would not fit.
Since spiral stairs rise steeply and compactly, they utilize vertical space effectively without requiring a large footprint on the floor plan.
These are commonly used in lofts, mezzanines, rooftops, or small apartments, where aesthetics and space-saving are both priorities.
While great for space efficiency, they may not be suitable for areas with high traffic or for moving large items due to limited tread width and central support.

Additional InformationDog-legged Staircase

Structure: This staircase consists of two flights running in opposite directions with a landing in between, making a 180° turn.
Space Use: Though more compact than a straight staircase in length, it still needs a fair amount of space due to the landing.
Application: Commonly used in residential and office buildings where moderate space is available and vertical circulation is needed in confined widths.
Advantage: Eliminates long landings and provides directional change efficiently.
Not Ideal For: Very small or tight spaces due to the requirement of both vertical and horizontal area.

Quarter-Turn Staircase

Structure: Also known as L-shaped stairs, they change direction 90° at a landing point.
Space Use: Slightly more compact than straight stairs, as they can fit into a corner layout. However, they still need more space than spiral stairs.
Application: Suitable for residential homes, especially where an aesthetic or architectural feature is desired.
Advantage: Offers better safety due to the landing and reduced steepness.
Not Ideal For: Very limited space, especially when trying to maximize usable floor area.

Straight Flight Staircase

Structure: A single, continuous flight without any turns or landings.
Space Use: Requires the longest linear space among all types; hence not space-efficient.
Application: Industrial buildings, fire escapes, or minimalistic design settings.
Advantage: Easy to construct, navigate, and move furniture.
Not Ideal For: Space-constrained areas as it occupies a large amount of floor length.