DESIGN & SCOPE REQUIRED FOR THE ARRANGEMENTS OF STAIRS .

DESIGN AND INTRODUCTION OF STAIR CASES :--The purpose of stair case is to provide pedestrian access to different levels within a building. The geometrical forms of stair cases may be quite different depending on the individual circumstances involved . There are two main components of a staircase :Stairs and landing slab .The stairs and landing slab can be arranged in different forms to get different types of stair cases .The shape and structural arrangement of a staircase would generally depend on two main factors: (1) Type of construction of the structure around the staircase ,that is ,load bearing brick structure or reinforced concrete frame structure,and  (l l) Availability of space .Rise and going are two terms associated with a stair .The term rise refers to the vertical height of a step and going represents the horizontal dimension. GENERAL RULES :-- (1) Between consecutive floors there should be an equal rise for every parallel step . Similarly there should be equal going.(2) There should be atleast 2 m headroom measured vertically above any step .(3) The sum of going of a single step plus twice the rise should be between 550mm and 700 mm.(4) The rise of a step should not be more than 200 mm and the going not less than 240 mm .(5) The slope or pitch of stair way should not be more than about 38 degree (6) Width of a stair case will depend upon the usage , and may be different for residential and commercial type of the building ,as the case may be .