TryBuildCalcStaircase Construction Verification Checklist
🕒 Last updated: June 28, 2026
Essential Checklist+−
Complete these critical checks before approving the work or proceeding to the next construction stage.
✓18 Inspection Points
✓4 Verification Categories
✓Staircase Dimensions & Compliance+-
- Riser and tread comply with 2R + T = 600–620mm rule
- Riser height within 150–190mm — 160–170mm recommended for residential
- Tread (going) width within 250–300mm — not less than 250mm per NBC
- All riser heights identical — variation not more than ±5mm across entire flight
- Headroom clearance minimum 2100mm measured vertically above stair nosing line
- Stair width complies with minimum requirements — 900mm residential, 1200mm commercial
- Landings provided at direction changes — depth not less than stair width
✓Structural Design & Slab Thickness+-
- Waist slab thickness confirmed — minimum 100mm, typically 125–150mm for residential
- Reinforcement size and spacing confirmed from structural drawing
- Stair support conditions verified — supported on beams, walls, or landing slab
✓Formwork+-
- Stair soffit formwork level and at correct slope along full stair length
- Riser boards set plumb and at correct height — measured from the waist, not from tread
- Tread formwork level and at correct width for all steps
- Stair soffit formwork adequately propped — props at maximum 900mm centres
✓Concreting & Finishing+-
- Concrete poured from bottom to top of stair — not top-down
- Concrete compacted at each riser zone before moving to the next tread
- Tread surface finished level and to correct slope (anti-slip 1:100 crossfall)
- Stair treads and exposed surfaces cured for minimum 7 days
Full QC Checklist+−
Verification checklist for staircase design, estimation, and construction — covering dimensional compliance, formwork, reinforcement, concrete, nosing, and safety. Use the Essential Checklist for critical design and pre-pour checks; expand to Full QC Checklist for complete quality control from design through finishing.
✓30 Inspection Points
✓4 Verification Categories
✓Staircase Dimensions & Compliance+-
- Riser and tread comply with 2R + T = 600–620mm rule
- Riser height within 150–190mm — 160–170mm recommended for residential
- Tread (going) width within 250–300mm — not less than 250mm per NBC
- All riser heights identical — variation not more than ±5mm across entire flight
- Headroom clearance minimum 2100mm measured vertically above stair nosing line
- Stair width complies with minimum requirements — 900mm residential, 1200mm commercial
- Landings provided at direction changes — depth not less than stair width
- Number of risers per flight confirmed — maximum 16 risers per flight in residential
- Floor-to-floor height confirmed on site — used for riser count calculation
- Nosing overlap of 25–30mm provided on each tread if specified
- Handrail height 900mm from nosing — confirmed in design before concrete is poured
- If winder steps are used — minimum tread width 150mm at narrow end
✓Structural Design & Slab Thickness+-
- Waist slab thickness confirmed — minimum 100mm, typically 125–150mm for residential
- Reinforcement size and spacing confirmed from structural drawing
- Stair support conditions verified — supported on beams, walls, or landing slab
- Top steel continuity into landing slab or supporting beam confirmed
- Concrete grade confirmed — M20 minimum for RCC staircases
✓Formwork+-
- Stair soffit formwork level and at correct slope along full stair length
- Riser boards set plumb and at correct height — measured from the waist, not from tread
- Tread formwork level and at correct width for all steps
- Stair soffit formwork adequately propped — props at maximum 900mm centres
- Release agent applied to all formwork faces including riser boards
- Soffit formwork stripping time confirmed — minimum 14 days for OPC concrete
✓Concreting & Finishing+-
- Concrete poured from bottom to top of stair — not top-down
- Concrete compacted at each riser zone before moving to the next tread
- Tread surface finished level and to correct slope (anti-slip 1:100 crossfall)
- Nosing formed cleanly — rounded or square edge as per specification
- Anti-slip surface or inserts confirmed — especially for public stairs and external stairs
- Stair treads and exposed surfaces cured for minimum 7 days
- Balustrade pocket positions confirmed and formed in concrete during pour
Inspection Notes+-
Use the latest approved drawings, specifications, and measured site inputs.
Complete all critical checks before approving the work or proceeding to the next construction stage.
Record non-conformances and verify rectification before sign-off.
Inspection Notes
Use the latest approved drawings, specifications, and measured site inputs.
Complete all critical checks before approving the work or proceeding to the next construction stage.
Record non-conformances and verify rectification before sign-off.