De-shuttering Time for RCC Walls and Columns

Formwork Removal Guidelines for Reinforced Concrete

De-shuttering (formwork stripping) timing depends on concrete grade, cement type, admixtures, ambient temperature, and structural role. General guidelines (IS 456 / ACI 347 / BS 5975):

Walls

• Non-load-bearing: 24 hrs (OPC, 20–30°C); 12–18 hrs with accelerators.
• Load-bearing: 48 hrs (OPC); 24–36 hrs with accelerators.
• Cold weather (<10°C): Add 24–48 hrs.

Columns

• Standard: 48 hrs (OPC, moderate temps).
• With accelerators: 36 hrs.
• Cold weather: Add 48–72 hrs.

Critical Notes

• Concrete must achieve sufficient strength (typically ≥50% design strength for vertical elements, ≥70% for load-bearing).
• Cube/cylinder tests or maturity meters should verify.
• Engineer's approval mandatory before stripping.
• Re-shutter if green concrete shows damage.

These are minimums; project specs may require longer.