stairs are means of descending or ascending from one floor level to another by a series of steps.
PARTS OF A STAIR
- Riser – is the vertical face of a step
- Rise – vertical distance between to consecutive treads
- Tread – horizontal surface of the stair that is stepped on
- Going– horizontal distance between two consecutive risers.
- step – consists of a tread and a riser
- stairwell – the space enclosing a staircase
- Nosing – projection of a tread beyond the riser for size increase.
- string – structural part of the stair which carries the steps
- Newel post – a member put at the beginning of stair or landing that carries handrail and string
- balustrades – vertical members spanning from the handrail to the steps
- landing – a platform between flights used as a resting place or for change of direction.
- flight – series of uninterrupted steps
- head room – space between the your head to the the ceiling or upper floor of a room.
TYPES OF STAIRS
- straight flight stair – all the stairs in this case head in the same direction from floor to floor with or without a landing.
- quarter turn stairs – this has a quarter space landing which turns through an angle of 90 degrees and continues to the next floor.
- half turn/ dog leg stairs – this is a stair that rises to a half space landing between floors turns through 180 degrees with the second flight rising in opposite direction to the one below.
- open well/ open newel stair – in this type of stair a hole called a well is formed in center of staircase and continues from the bottom to the top of a staircase.
- bifurcated stair – this is a stair that goes half the journey as a straight flight stair and then branches in two opposite directions.
- circular stairs – this are stairs that are circular in nature.
- geometric stair – better known as winder stair. Is similar to other stairs like open newel above but instead of a landing it has a series of winders the corners.
- spiral stair– form of geometric stair that has no well.