This code provides safety guidelines for the design, fabrication, erection, and stripping of concrete formwork. It specifies minimum loads, material requirements, and procedural checks to ensure the stability of temporary structures and the safety of workers on construction sites.
Lays down safety requirements for the design, erection, use, and dismantling of concrete formwork.
Quick Reference Values
Minimum live load on formwork deck200 kg/m2
Minimum concentrated load on formwork deck450 kg
Minimum horizontal load for bracing design2% of total vertical dead load
Factor of safety against overturning1.5
Maximum permissible deflection in formworkspan/270 or 3 mm, whichever is less
Key Formulas
P = wH — Formula for lateral pressure of fresh concrete (where P is pressure, w is density, and H is height of fluid concrete)
Practical Notes
This is an old standard (reaffirmed in 2018), so manufacturer specifications for modern proprietary formwork systems should also be consulted and may govern.
The role of a 'competent person' for supervision and inspection, as mentioned in the code, is critical and should be formally assigned on site.
While this code covers formwork safety, minimum striking times for formwork are primarily specified in IS 456, based on concrete strength development.