Tensão admissível (CA-50)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The allowable stress calculator (CA-50) determines the maximum stress that CA-50 steel can withstand, considering a safety factor. It uses the formula σ_adm = fyk/1.15, where fyk is the yield strength of the steel (500 MPa for CA-50). The divisor 1.15 represents a common safety coefficient in structural engineering.
This tool is crucial for civil engineering projects, particularly for designing reinforced concrete elements like beams and columns. By inputting the characteristic strength of the steel, the calculation provides the allowable stress, ensuring structures meet technical standards and safety norms.
Use this calculator with caution: input values (like fyk) must match material specifications. Results should be reviewed by professionals, as structural calculations require detailed analysis of loads, environmental conditions, and other technical factors.
Frequently asked questions
Why divide by yield strength (fyk)?
Dividing by fyk ensures the steel does not reach its yield limit, applying a safety factor to prevent structural failure.
What is CA-50?
CA-50 is a common construction steel with 500 MPa yield strength. It is used for reinforcing reinforced concrete structures.
Can I use this calculator for other steel types?
No. The formula and values are specific to CA-50. Other steels require formulas adjusted to their strength.
How accurate is the calculator's result?
The calculation is theoretical and based on standard parameters. For real projects, consult technical standards and a structural engineer.