Reinforced Cement Concrete (RCC) staircases are one of the most important structural elements in residential, commercial, and industrial buildings. Proper detailing of the riser, tread, waist slab, reinforcement bars, landing beam connection, and support details ensures safety, durability, and comfortable movement between floors.
This article explains complete RCC staircase detail drawings including riser and tread dimensions, reinforcement arrangement, construction sequence, and practical site execution methods.
What is Riser and Tread in RCC Staircase?
Riser
The vertical portion between two steps is called the riser.
- Standard riser height:
- Residential: 150 mm to 175 mm
- Commercial: 120 mm to 150 mm
A higher riser makes climbing difficult, while a lower riser increases staircase length.
Tread
The horizontal surface where the foot is placed is called the tread.
- Standard tread width:
- Residential: 250 mm to 300 mm
- Commercial: 300 mm to 350 mm
A wider tread provides better walking comfort and safety.
Standard RCC Staircase Dimensions
| Component | Recommended Size |
|---|---|
| Riser Height | 150–175 mm |
| Tread Width | 250–300 mm |
| Waist Slab Thickness | 120–180 mm |
| Landing Thickness | 120–150 mm |
| Stair Width | 900–1500 mm |
| Handrail Height | 900 mm |
RCC Staircase Components
1. Waist Slab
The inclined RCC slab carrying the staircase load.
Functions:
- Transfers load to beams and columns
- Supports step concrete
- Holds reinforcement bars
Typical thickness:
- 120 mm to 180 mm
2. Steps (Riser & Tread)
Steps are constructed over the waist slab.
Construction Types:
- Brick-filled steps with concrete finish
- Fully RCC cast monolithic steps
- Precast RCC steps
3. Landing
Landing is the horizontal resting platform between stair flights.
Purpose:
- Provides rest area
- Changes stair direction
- Improves safety
4. Reinforcement Steel
Steel bars resist tension forces in the staircase slab.
Common Reinforcement:
- Main bars along slope
- Distribution bars perpendicular to slope
- Extra top bars at supports
- Landing beam anchorage bars
RCC Staircase Detail Drawing Explanation
Longitudinal Section Details
A staircase sectional drawing generally includes:
- Floor-to-floor height
- Number of risers
- Tread dimensions
- Waist slab thickness
- Reinforcement spacing
- Landing level
- Beam connection details
Typical Reinforcement Details
Main Bars
- Usually 10 mm or 12 mm bars
- Spacing: 100 mm to 150 mm c/c
- Provided along staircase slope
Distribution Bars
- Usually 8 mm bars
- Spacing: 150 mm to 200 mm c/c
- Placed perpendicular to main bars
Cover
Concrete cover protects reinforcement from corrosion.
Typical cover:
- 20 mm to 25 mm
Staircase Slope Calculation
Ideal staircase slope:
- Between 25° and 40°
Formula:
2R + T = 600 mm to 650 mm
Where:
- R = Riser
- T = Tread
Example:
- Riser = 160 mm
- Tread = 280 mm
2(160) + 280 = 600 mm
This provides comfortable stair movement.
Types of RCC Staircases
Dog Legged Staircase
Most commonly used in residential buildings.
Features:
- Two parallel flights
- Intermediate landing
- Space-saving design
Open Well Staircase
Contains open space between flights.
Advantages:
- Better appearance
- Good ventilation
Cantilever Staircase
Steps project from wall without visible support.
Used In:
- Modern architecture
- Luxury interiors
Spiral RCC Staircase
Circular staircase around central column.
Suitable For:
- Compact areas
- Terrace access
RCC Staircase Construction Procedure
Step 1 – Layout Marking
- Mark staircase dimensions
- Check floor height
- Calculate riser count
Step 2 – Centering and Shuttering
- Install plywood and steel supports
- Provide inclined shuttering
- Ensure proper alignment
Step 3 – Reinforcement Fixing
- Place main and distribution bars
- Provide cover blocks
- Fix landing reinforcement
Step 4 – Electrical Conduit Provision
- Install conduit for stair lighting if required
Step 5 – Concrete Pouring
- Use M20 or higher grade concrete
- Compact using vibrator
- Avoid honeycombing
Step 6 – Curing
- Cure minimum 7–14 days
- Maintain moisture continuously
Common Site Mistakes in RCC Staircase
Incorrect Riser Height
Uneven risers create walking discomfort and safety hazards.
Improper Reinforcement Anchorage
Insufficient anchorage weakens staircase support.
Poor Shuttering Alignment
Causes uneven steps and finishing defects.
Insufficient Concrete Cover
Leads to reinforcement corrosion.
Honeycombing in Waist Slab
Occurs due to poor vibration during concreting.
Advantages of RCC Staircase
- High strength and durability
- Fire resistant
- Low maintenance
- Suitable for heavy loads
- Long service life
- Economical for multi-storey buildings
RCC Staircase Design Tips
- Maintain uniform riser height
- Avoid steep stair slope
- Provide anti-skid finish
- Ensure proper headroom
- Use adequate reinforcement
- Follow IS 456 and IS 875 standards
Conclusion
Proper RCC staircase riser and tread detailing is essential for structural safety, user comfort, and long-term durability. Accurate reinforcement placement, correct riser-tread proportion, and proper shuttering practices ensure a high-quality staircase structure.
Whether for residential houses, apartments, commercial buildings, or industrial facilities, understanding RCC staircase detail drawings helps engineers, contractors, and homeowners achieve safe and efficient construction.
- Australian Wind Load Calculator as per AS/NZS 1170.2:2021
Australian Wind Load Calculator | AS/NZS 1170.2:2021 Australian Wind Load… Read more: Australian Wind Load Calculator as per AS/NZS 1170.2:2021 - Wind Load Calculator as per IS 875 Part 3:2015
Industrial Shed Wind Load Calculator | IS 875 Part 3:2015… Read more: Wind Load Calculator as per IS 875 Part 3:2015 - RCC Staircase Detail Drawing free pdf Download
Reinforced Cement Concrete (RCC) staircases are one of the most… Read more: RCC Staircase Detail Drawing free pdf Download - Modern 35×40 House Design with Premium Front Elevation
Building a dream home on a 35×40 plot is one… Read more: Modern 35×40 House Design with Premium Front Elevation - Pipe Rack GA Drawing Layout
Image – Typical Pipe Rack GA Drawing Explanation The above… Read more: Pipe Rack GA Drawing Layout - House Plan 30×40 West Facing | 2BHK Luxury Floor Design |
Designing a compact yet spacious home on a 30×40 plot… Read more: House Plan 30×40 West Facing | 2BHK Luxury Floor Design | - Bund Wall Detail Drawing for Tank Farm and Oil Storage Area
Introduction A bund wall (also called a dyke wall or… Read more: Bund Wall Detail Drawing for Tank Farm and Oil Storage Area - Dyke Wall Layout and Detail | Oil Tank Containment Systems |
Introduction A dyke wall (also called a bund wall or… Read more: Dyke Wall Layout and Detail | Oil Tank Containment Systems | - Apartment Plan 28×32 West Facing with Modern Elevation
This project showcases a well-planned 30×40 west-facing apartment design featuring… Read more: Apartment Plan 28×32 West Facing with Modern Elevation - How to Assign LY and LZ in STAAD for Steel Structures (With and Without Bracing)
🔹 What is LY and LZ? In STAAD.Pro: These define… Read more: How to Assign LY and LZ in STAAD for Steel Structures (With and Without Bracing) - HOUSE PLAN 35 X 41 | EAST FACING |
Designing a perfect home requires a balance of functionality, aesthetics,… Read more: HOUSE PLAN 35 X 41 | EAST FACING | - EDG Building Power Cable Layout with MTO Guide
Introduction An Emergency Diesel Generator (EDG) system is a critical… Read more: EDG Building Power Cable Layout with MTO Guide - HOUSE PLAN EAST FACING 30 X 40
Designing a compact yet functional home on a 30’ x… Read more: HOUSE PLAN EAST FACING 30 X 40 - Septic Tank Drawing and Details
Septic tanks are widely used in residential buildings for on-site… Read more: Septic Tank Drawing and Details - Holding Tank Detail
Introduction A holding tank, also known as a water sump… Read more: Holding Tank Detail - Rain Water Harvesting System pdf Book Download
TABLE OF CONTENTS 1.0 INTRODUCTION 3 2.0 CHAPTER 1 4… Read more: Rain Water Harvesting System pdf Book Download - Galvanized Gate | Design Details and Specifications Guide |
Introduction Industrial galvanized gates are designed for heavy-duty usage, high… Read more: Galvanized Gate | Design Details and Specifications Guide | - Soak Pit Details | Seepage Pit |
Introduction A soak pit or seepage pit (also called a… Read more: Soak Pit Details | Seepage Pit | - HOUSE PLAN 25 X 48 | SOUTH FACING |
Project Overview This 25’ x 48’ South Facing G+1 house… Read more: HOUSE PLAN 25 X 48 | SOUTH FACING | - Expansion, Contraction and Construction Joints in Concrete for Civil Works
1. Introduction Concrete is one of the most widely used… Read more: Expansion, Contraction and Construction Joints in Concrete for Civil Works - Modern 4BHK West Facing House Plan (60×50) with Pool & Luxury 3D Design
✨ Overview of the House Design This 60×50 west-facing modern… Read more: Modern 4BHK West Facing House Plan (60×50) with Pool & Luxury 3D Design - Cable Rack Structural Steel Detail and Design
Introduction Cable racks (also called cable trays or cable support… Read more: Cable Rack Structural Steel Detail and Design - RCC Shear Wall Details
Introduction Reinforced Cement Concrete (RCC) shear walls are one of… Read more: RCC Shear Wall Details - RCC Column with Splice and Coupler in Reinforcement Free Download
Introduction Reinforced Cement Concrete (RCC) columns are one of the… Read more: RCC Column with Splice and Coupler in Reinforcement Free Download - Repair Principles for Corrosion Damaged Reinforced Concrete Structures
Reinforced concrete is one of the most widely used construction… Read more: Repair Principles for Corrosion Damaged Reinforced Concrete Structures
Leave a Reply