Introduction

This lesson covers Pattern Loading, explaining how the user can distribute live and snow loads on multi-span beams. When enabled, Sizer automatically generates all possible load patterns and designs for the worst-case scenario, ensuring compliance with NBC 4.1.5.3 and NBC 4.1.1. The program systematically turns live or snow loads on and off in different spans to create critical load combinations, affecting shear, moment, deflection, and uplift analysis. Pattern loading is essential as it can influence beam failure under certain conditions, even with the same load magnitude.

Learning Outcomes

By the end of this lesson, you will be able to:

• Explain the purpose and functionality of pattern loading in Sizer Program for multi-span beam design.
• Describe how Sizer automatically generates load patterns to comply with NBC 4.1.5.3 and ensure the worst-case load conditions are considered.
• Interpret the notation used in the design results (e.g., L for live loads, S/s for snow loads) and their impact on beam analysis.
• Analyze how pattern loading affects structural design outcomes and influences whether a beam passes or fails under different loading scenarios.

Instructional Video (Part 2 of 2)

Video Run Time: 04:17 minutes