👉STAIRCASE DESIGN & DIMENSIONS — KEY CIVIL ENGINEERING DETAILS

🌟A well-designed staircase must be safe, comfortable, structurally adequate, and compliant with the applicable building code.

📐 Important Dimensions Shown

1. Minimum headroom: 2.10 m
2. Handrail height: 0.90 m
3. Landing: At floor level and where required
4. Riser: 0.15 m (150 mm)
5. Tread: 0.25 m (250 mm)
6. Total rise: 3.00 m
7. Typical riser range: 0.15–0.20 m
8. Stair width: 1.20 m
9. Horizontal run shown: 4.50 m

🧮 Staircase Formula — Blondel’s Rule

2 × Riser + Tread ≈ 0.60–0.65 m

For the dimensions shown:

2 × 0.15 + 0.25 = 0.55 m

⚠️ Important: 0.55 m is below the commonly used 0.60–0.65 m comfort range, so the “safe & comfortable” check shown in the graphic should not be interpreted as a universal code-compliance approval.

Stair dimensions should be finalized according to the applicable local building code and actual floor-to-floor height.

🏗️ RCC Staircase Reinforcement Shown

- Main reinforcement: Ø12 mm @ 150 mm c/c along the slope
- Distribution reinforcement: Ø10 mm @ 200 mm c/c
- Clear cover: 20 mm

These reinforcement sizes are illustrative only.
Actual reinforcement must be designed based on span, loading, support conditions, concrete/steel grades, thickness, seismic requirements, and the governing structural code.

🔨 Construction Points

✔ Keep riser heights uniform throughout the flight.
✔ Maintain uniform tread dimensions.
✔ Provide a suitable non-slip finish.
✔ Ensure adequate landing and headroom.
✔ Provide properly anchored handrails/guardrails.
✔ Use proper concrete compaction and curing.
✔ Check the complete staircase design before construction.

Remember: Staircase dimensions and reinforcement should be verified by a qualified structural engineer and the applicable local building regulations before construction.

@etconp