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2 posts
Choosing a Slab System: Flat, Beam-and-Slab or Waffle
Guide

Choosing a Slab System: Flat, Beam-and-Slab or Waffle

The slab is usually the largest single element of a building by volume, and the system chosen for it decides the floor-to-floor height, the services strategy and the construction programme long before any reinforcement is calculated. This guide sets out what each system is actually good at, where each one fails, and why on a tall building 200 mm of structural depth can be worth an entire extra floor.

CivilAxis · 8 Sept
B30 Is Not C30: Comparing TCVN and Eurocode Grades
Research

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