Reinforcement for RC stairs

• Reinforcement of a concrete stair depends on the system of construction adopted .
• The reinforcement has to have a cover of concrete around it to inhibit rust and protect steel rods against damage by fire . 
• Mild steel or high-yield steel bars can be used to reinforce concrete stairs . 
• The bars being lapped to starter bars at the ground floor and taken into the landing or floor support slab . 
• The number , diameter and spacing of the main and distribution reinforcement must always be calculated for each stairway . 
• The main reinforcement of the landings is both ways across the bottom of the slab .
• THe main reinforcement of the flights is one way down the flights . 

(50 x 15 plastic covered metal handrail )
(20 x 20 metal standards )
(50 x 10 metal rail )
( EXternal wall )
(RC landing )
(Distribution bars )
(Main bars in both directions )
(Main bars lapped with starter bars )
(Compacted hardcore )
(starter bars )
(DPM)
(Mass concrete ground floor )
(half space landing built into walls )
(landing bears on wall )
(12mm rods across first floor landing )
(12mm rods along lengths of flight and one to each tread )