Vão Efetivo
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
L_ef
About this calculator
The Vão Efetivo calculator is a useful tool for structural calculations in construction. It helps determine the effective span of a beam, considering the free length (L_livre) and the smaller between the distance between the beam supports (b) and the beam height (h).
The formula used by the calculator is L_ef = L_livre + min(b, h), where L_ef is the effective span and L_livre is the free length.
The Vão Efetivo calculator should be used in construction projects that involve creating structures, such as buildings, bridges or other civil engineering projects.
It is essential to remember that the free length and the smaller between the distance between the beam supports and the beam height must be measured correctly for the calculator to provide accurate results.
Frequently asked questions
What is the effective span?
The effective span is the distance between the supports of a beam, considering the free length and the smaller between the distance between the beam supports and the beam height.
Why is it important to calculate the effective span?
The effective span is important to calculate because it directly affects the stability and safety of the structure. An inadequate effective span can lead to structural problems and risk of collapse.
When should I use the Vão Efetivo calculator?
You should use the Vão Efetivo calculator in construction projects that involve creating structures, such as buildings, bridges or other civil engineering projects.
What is the free length?
The free length is the capacity of a beam to elongate without being affected by the rigidity of the structure.