Scope & assumptions
Simply supported rectangular timber beam under full-span UDL. Code-dependent modification factors are represented by the verified factored resistances entered by the user.
METRIC REPUBLIC ENGINEERING · PRELIMINARY
CSA O86:24 Timber Beam Demand & Resistance Organizer
Rectangular timber-beam demand check using user-verified factored bending and shear resistances.
CSA O86:24Update No. 1 (2025)Timber
Calculation basis
W = b·h²/6; I = b·h³/12; Mf = qf·L²/8; Vf = qf·L/2; σ = M/W; τmax = 1.5V/(b·h); w = 5qserL⁴/(384EI).
Important engineering note: CSA O86:24 includes member-specific modification factors, stability, notching/holes, bearing, vibration, fire, connections and product-specific requirements. Enter project-verified resistances and complete the applicable code checks independently.
Reference basis
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Frequently asked questions
Is this a complete code design?
No. It is a transparent preliminary calculation. Code-specific limits, detailing, stability and project conditions must be verified independently.
Can I use the result for construction?
Use the result as a screening or checking aid only. Final design and construction documents should be verified by a qualified professional where required.
Why are some resistance factors entered by the user?
Many design standards contain member-, material-, product- or project-specific values. Metric Republic keeps these visible and user-controlled instead of hiding assumptions.