Surface Design According to AISC, ADM, and CSA Standards

USA Standards (AISC 360 & ADM)

The surface design parameters are defined in the Strength Configuration for both steel and aluminum design. To align with AISC design methodology, stresses are separated into normal and shear components. The corresponding resistance factors for LRFD and safety factors for ASD are also provided (Image 1).

For steel, the option to perform plastic strain design for surfaces with plastic material model is available. The recommended limit strain ε_pl,lim is 50 ‰.

1 Surface Strength Configuration

Maximum stresses are compared against the material yield stress, with the applicable design factors included (Image 2).

2 AISC Design Ratios by Surface

Canadian Standards (CSA S16 & CSA S157)

The surface design parameters are presented in the Ultimate Configuration for both steel and aluminum design. Stresses are evaluated using the equivalent von Mises stress (Image 3).

3 Ultimate Configuration

The maximum stress is compared to the material yield stress, with a resistance factor, Φ = 0.90 applied (Image 4).

4 CSA Design Ratios by Surface

Knowledge Base

Surface Design According to AISC, ADM, and CSA Standards