Quality Inspector
Structural Engineering
Professional Staircase Design & Engineering Master
Expert Guide
The ultimate system for designing safe, comfortable, and compliant staircases. Includes geometry checking, Blondel comfort formula, and vertical clearance (headroom) analysis.
⚡ Quick Answer
The golden rule: 2R + T = 600mm. For 3m floor height, ideal is 20 risers of 150mm with 300mm tread. Minimum headroom per Nepal NBC is 2100mm. For architectural stair drawings, visit pro.nirmansutra.com.
🛠️ How It Works
Riser = Total Height / ceil(Height / 150). Tread = (Total Height - Landing) / (Risers - 1). Comfort = (2 * R) + T.
- Enter the total floor-to-floor height.
- Select Builder mode for quick estimates or Engineering mode for headroom clearance checks.
- The tool calculates the exact risers and validates comfort with Blondel's formula.
- For full staircase structural drawings, use pro.nirmansutra.com.
📋 Real-Life Example
Example: Straight Staircase for 3m floor height. 1. Target Riser = 150mm. 2. Risers = ceil(3000/150) = 20 nos. 3. Actual Riser = 3000/20 = 150mm. 4. Tread = 600 - 2×150 = 300mm (Blondel Check: OK ✓). 5. Total Run = 19 × 300 = 5700mm (5.7m).
❓ Frequently Asked Questions
As per Nepal National Building Code (NBC), minimum headroom is 2100mm (7ft). See our [Staircase Design Blog](https://blog.nirmansutra.com/) for detailed guidelines.
2R + T = 600mm. This ensures a comfortable stride for average human ergonomics. Stairs deviating from this feel either too steep or too flat.
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