Thread by @cenas_j

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Today let us look at the technical terms used in a staircase - as a critical structure that necessitates flight from one storey to another in multi-storey structures.
1. Baluster: It is simply the infill between the handrail and string comprising square vertical balusters

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fitted to string capping while supporting the existing handrail. For safety reasons, the gaps should be 100 mm apart.
2. String:
This is the side support system for a flight in either timber or concrete-based steps. They are two-timber or steel pieces measuring 40 by 250 mm

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3.Flight:
It refers to a series of steps between floor(s) or a landing.
4.Landing:
It refers to the level spaces that mostly breaks up the vertical inclined handrail at each end.
5. Handrail:
An inclined rail that follows the slope of the stairs, fixed on wall or bulstrade

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6. Riser:
This is the vertical surface of a step.
7. Nosing:
It is the part of the thread that projects beyond the face of a stair
8. Rise:
It is the vertical distance btn. the tops of adjacent treads
9. Tread:
The horizontal surface of a step where you place your feet.

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The treads in a concrete-based stair are mostly 25 mm thick.
10. Newel:
It is a stout vertical post at one end of an outer string which functions as a support element for the inclined handrail in the staircase.
11. Newel Post:
It is the main support for the handrail staircase

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Lastly, the staircase layouts are mostly simple, but all in all, direction of the flight also determines simplicity. Therefore, if flight changes direction between the levels, a landing should be provided and also, degree of direction change determines size of landing.