👉RCC / Concrete Staircase – Structural & Dimension Guide
🚥An RCC staircase is designed to provide safe and comfortable access between different floor levels. The main components include treads, risers, stringers/side beams, landings, reinforcement, and supporting footings.
🌟Key Dimensions Shown
- Total height: 2.8 m
- Total length: approximately 5.5 m
- Stair width: 0.9 m
- Rise (R): 0.20 m
- Tread (T): 0.20 m
- Number of steps: 14
- Landing: Provided at the intermediate portion
- Base footing: approximately 1.6 m × 0.9 m as illustrated
Important Components
1. Stringer / Side Beam – Supports the staircase along its inclined sides.
2. Tread – The horizontal surface on which the foot rests.
3. Riser – The vertical portion between two consecutive treads.
4. Landing – Provides a resting and turning area.
5. Base Footing – Transfers the staircase/support loads safely to the ground.
Reinforcement & Construction Notes
- The illustration indicates M20 concrete for treads and landing.
- Minimum reinforcement shown is 8 mm diameter bars at 150 mm c/c, subject to structural design.
- Reinforcement detailing should be finalized according to the span, loading, support conditions, and applicable design code.
- Maintain uniform rise and tread dimensions for comfortable movement.
- Proper concrete compaction and curing are essential for strength and durability.
- Provide adequate side support/stringers and proper anchorage at landings and supports.
Staircase Formula
A commonly used comfort relationship is:
2R + T ≈ 600 mm
For the dimensions shown:
2(200) + 200 = 600 mm
The drawing also shows a 45° slope calculation, although the stated slope angle elsewhere in the illustration is approximately 37°. The actual stair slope should be determined from the final verified rise and horizontal going dimensions.
Note: Staircase dimensions and reinforcement must be verified by a qualified structural engineer before construction. The values in this illustration should be treated as an educational reference, not a construction drawing.
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