MGP12
Higher-stiffness machine-graded pine used where longer spans or stiffer floor and roof framing are required, with modulus of elasticity around 12 GPa.
A step up from MGP10, with a characteristic modulus of elasticity of approximately 12 GPa and characteristic bending strength near 28 MPa. Graded mechanically under AS/NZS 1748, it is specified for floor joists, lintels, rafters, and longer-span framing where MGP10 cannot meet AS 1684 span tables. The visual appearance is similar to MGP10 but the grade stamp differs. MGP12 reduces deflection in floors and helps avoid bouncy diaphragms in larger rooms. For procurement, MGP12 typically costs more than MGP10 but can allow smaller section sizes for the same span, sometimes saving overall material cost. Confirm treatment level (H2 for termite zones) and ensure the merchant supplies certified, stamped product.
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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