ASD vs LRFD: How Structural Engineers Combine Loads and Why It Matters
A homeowner reading a structural calculation package for the first time will often notice what looks like a contradiction. One page adds the dead load and live load directly. Another page multiplies the same loads by 1.2 and 1.6. Both pages can be correct. They reflect two accepted design philosophies, Allowable Stress Design (ASD) and […]