F17
Mid-strength hardwood stress grade with approximately 17 MPa characteristic bending strength, common for hardwood framing, beams, and structural plywood face veneers.
A widely used hardwood stress grade under AS 2082, with a characteristic bending strength of about 17 MPa and a modulus of elasticity around 14 GPa. F17 Kiln Dried Hardwood (KDHW) is specified for beams, lintels, bearers, and joists where higher strength than MGP framing is needed. F17 is also a common face-grade for structural plywood manufactured to AS/NZS 2269. Design values are listed in AS 1720.1. F17 hardwood is heavier and harder to fix than MGP pine, often requiring pre-drilling. For buyers, F17 sections deliver longer spans and smaller member sizes than equivalent pine, which can help in renovations with restricted depth. Verify species and grade stamp on every length.
Values and references on this page are indicative and drawn from common industry sources. Always verify the current AS/NZS standard, manufacturer data sheet or NIAA policy publication before relying on figures for design, specification or compliance work.
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