#eurocode

3 posts

B30 Is Not C30: Comparing TCVN and Eurocode Grades

Engineers working across TCVN and Eurocode routinely map B30 onto C30/37 because the numbers match. They do not describe the same concrete. Comparing the two grade systems against a common basis shows the numeral mapping overstates design strength by 18 percent, while the correct mapping agrees within 2 percent, and reveals that both codes have been using the same safety factor on steel all along.

CivilAxis · 3 Sept

Guide

Deflection: Why the Cracked Section Changes Everything

Run a deflection check on the gross concrete section with the short-term modulus and a beam will pass comfortably. Run the same beam cracked and creeping, as it will actually behave, and the answer is roughly twelve times larger. This article works one 7 m beam through both routes and shows exactly where the factor of twelve comes from.

CivilAxis · 2 Sept

Structures

The 0.3 mm Crack Limit: What It Actually Protects

Almost every reinforced concrete element gets checked against a 0.3 mm crack width, and almost nobody asks what that number is for. It is not about leaks and it is not about looks. Working the calculation by hand reveals a genuine paradox: increasing the cover to protect the steel makes the surface crack wider.

CivilAxis · 31 Aug