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2 posts
The C1 Factor: Free Capacity in LTB Checks
Structures

The C1 Factor: Free Capacity in LTB Checks

A beam under uniform moment is the worst case for lateral-torsional buckling, yet many checks assume it for every beam. The C1 factor accounts for the real moment shape, and using it is often the difference between a pass and a heavier section.

Kenji Watanabe · 26 Sept
Why S355 Is Not Always 355 MPa
Structures

Why S355 Is Not Always 355 MPa

The grade name gives the yield strength of thin material only. Once a flange or plate passes 16 mm, S355 is designed with a lower value, and many common sections cross that line. Here is where the bands sit, which sections are affected and which table to use.

Lukas Novák · 18 Sept