Designing with ASTM F3125 Grade A325 Bolts in Canada
Posted by Guillaume Lachapelle on
🔩 Designing with ASTM F3125 Grade A325 Bolts in Canada?
Here's What You Need to Know! 🔩
When it comes to structural bolting in Canada, CSA S16 – the Design of Steel Structures standard – guides our approach, particularly for bolts like ASTM F3125 Grade A325 used in high-stakes applications.
Here’s a quick breakdown on determining load capacities for these bolts in a CSA S16-compliant design:
Limit States Design \(LSD\) – The Canadian approach is grounded in LSD, which uses specific resistance factors \(φ\) instead of a general safety factor:
Tensile Resistance Factor φt=0.75φ\_t = 0.75φt=0.75
Shear Resistance Factor φs=0.67φ\_s = 0.67φs=0.67
Load Capacities – For a 3/4-inch A325 bolt, here’s how we calculate:
Factored Tensile Load = φ\_t × Material Tensile Strength × Cross-sectional Area
Example: 30,060 lbs for a 3/4" bolt in tension
Factored Shear Load = φ\_s × 0.6 × Material Tensile Strength × Cross-sectional Area
Example: 16,075 lbs for a 3/4" bolt in shear
Load Combinations – Following NBC \(National Building Code of Canada\), ensure load combinations are met, incorporating load factors for dead, live, and environmental loads.
Compliance with CSA S16 doesn’t just strengthen our projects – it also ensures safety, longevity, and confidence in every structural connection we design.🔗
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