Buildings and structures

Solid slab: concrete, formwork, steel

Inputs

Formulas

V = L × l × e
S_coffrage = L × l + [2 × (L + l) × e]

Assumptions

  • Formwork measured on formed faces in contact with concrete (m²).
  • Steel estimated by ratio: indicative only, does not replace the bar schedule.

Fill in the inputs and run the calculation: results and every intermediate step will appear here.

These tools provide estimates and calculation aids. They are neither design calculations nor an engineering approval: any design or safety decision must be checked by a qualified professional against the applicable standards.

Version 1.0 · last reviewed: 10 Oct 2026