• Baluster - small post supporting the handrail or a coping.
• Balustrade - series or row of balusters joined by a handrail or a coping as the parapet of a balcony.
• Bearers - support for winders wedged into the walls secured by the stringer.
• Carriage - that portion which support the steps of a wooden stairs.
• Close String - staircase without open well as in a dog stairs.
• Cocktail Stair - term given to a winding staircase.
• Circular Stair - staircase with steps winding in a circle or cylinder.
• Elliptical Stair - those elliptical in plan where each tread assembly is converging in an elliptical ring in a plan.
• Flight of Stairs - series of steps leading from one landing to another.
• Front String - string on the side of stairs where handrail is placed.
• Flyers - steps in a flight that are parallel with each other.
• Geometrical Stairs - flight of a stair supported by the wall at the end of the steps.
• Half Space - interval between two flight of steps in staircase.
• Handrail - rail running parallel with the inclination of the stairs that holds the balusters.
• Hollow Newel - opening in the middle of the staircase as distinguished from solid newel wherein the ends of steps are attached.
• Housing - notches in the string board of a stair for the reception of stairs.
• Knee - convex bend at the back of the handrail.
• Landing - horizontal floor as the resting place in flight.
• Newel - central column where the steps of a circular staircase wind.
• Nosing - front edge of the steps that project beyond the riser.
• Pitch - angle of inclination of the horizontal of the stairs.
• Ramp - slope surface that rises and twists simultaneously.
• Rise - height of a flight of stairs from landing or the height between successive treads or stairs.
• Riser - vertical face of a stair step.
• Run - horizontal distance from the first to the last riser of a stair flight.
• Spandril - angle formed by a stairway.
• Staircase - whole set of stairs, the structure containing a flight of a stair.
• Stair Builders Truss - crossed beams which support the landing of a stair.
• Stair Head - initial stair at the top of a flight of a stair or staircase.
• Stair Headroom - clear vertical height measured from the nosing of a stair tread to any overhead obstruction.
• Stair Well - vertical shaft which contains a staircase.
• Step - stair which consists of one tread and one riser.
• Steps - assembly consisting of a tread and a riser.
• String - part of a flight of stairs which forms its ceiling or soffit.
• Soffit - underneath of an arch or molding.
• String Board - board next to the wall hole which receives the end of the steps.
• Tread - horizontal part of a step including the nosing.
• Tread Run - horizontal distance between two consecutive risers or, on an open riser stair, the horizontal distance between the nosing or the outer edges of successive treads all measured perpendicular to the front edges of the nosing or tread.
• Tread Length - dimension of a tread measured perpendicular to the normal line of travel on a stair.
• Tread Width - dimension of a tread plus the projection of the nosing.
• Wall String - board placed against the wall to receive the end of the step.
• Well - place occupied by the flight of stairs.
• Well Hole - opening in the floor at the top of a flight or stairs.
• Well Staircase - winding staircase enclosed by walls resembling a well.
• Winders - steps not parallel with each other.
• Wreath - whole of a helically curved hand rail.

Staircase Layout

• 25 cm. - 20 cm.
• 30 cm. - 25 cm.
• 35 cm. - 30 cm.