RC Details of Staircases

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 Staircases

SCOPE:

 Stairs Supported with Landings 
 Cantilever Stairs from Wall 

DETAILING STANDARDS:

Nominal Cover to Reinforcement:

Internal : 15mm or bar size + ΔCdev (5 or 10mm) 
External : 35mm + ΔCdev (5 or 10mm) 

Spacing and Size of bars:

Minimum spacing : 75mm (at laps) 
Maximum main bar spacing : 400mm 
Maximum secondary bar spacing : 450mm 
Minimum bar size : 10mm 


Bar arrangements: 

Stair Supported with Landings:








Cantilever Stair from Wall:







Typical Stair Starters:







Where,
T L is Tension lap
T A is Tension Anchorage


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