Engineering Guides

Wood Design with the NDS Supplement: A Practical Guide to Tables 1A–6B

A practical, plain-English guide to the NDS 2024 Supplement for engineers new to wood design: how lumber is sized (nominal vs dressed, S4S), section property tables 1A–1D, reference design values for sawn lumber (4A–4G) and glued laminated timber (5A–5D), round timber 6A–6B, the difference between E and E_min, the equivalent-square method for round columns, and how to go from reference values to adjusted design capacities.