Norsok N004 Connections (Rev. 3, 2013)

The Norsok N004 Connections (Rev. 3, 2013) implementation in SDC Verifier verifies the strength of simple circular tubular joints according to Chapter 6.4 of the standard. It evaluates recognized chords and braces directly in the FEA workflow, including checks for axial force, in-plane bending, out-of-plane bending, and their interaction at the joint level. 

Using Connection Finder, SDC Verifier automatically identifies supported connection geometry and extracts the chord and brace parameters required for calculation. The implementation uses defined yield and tensile material properties and applies the relevant standard equations inside the model workflow instead of moving connection verification into separate manual calculations. 

What this implementation checks 

• Joint axial and bending resistance for simple circular tubular joints 
• Interaction of brace axial force with in-plane and out-of-plane bending moments 
• Joint resistance using strength factor Qu and chord action factor Qf 
• Additional axial resistance for applicable Y- and X-joints with chord cans 
• Overlapping joint checks, including shear and combined axial/moment conditions