The strength is in the engineering. Strong. Stiff. Reliable. Prolam I-Joists are engineered for heavy performance. We start with ultrasonically graded LVL, bonded with exterior adhesive for more load carrying capacity. The webs are made from stable, strong Oriented Strand Board (OSB) for superior strength and consistent performance. Prolam I-Joists are more uniform than solid sawn joists. They stay straighter and are manufactured with no camber, so there is no chance of crown down or upside down installation. They resist shrinking,
twisting, warping and splitting for squeak resistant floors and quality roofs and ceilings. Holes may be easily cut in the web according to the tables on
page 22, allowing ducts and utilities to be run through the joists. Pre-punched 40 mm knockout holes are provided in the web for small diameter services or wiring.
Save time and money
Because they weigh less than solid sawn joists, Prolam I-Joists are easier to install, saving construction time and cost. Their greater load carrying capacity allows you to space them further apart, so it takes fewer to build the average floor or roof. And with five (4) depths from 200 to 360 mm, you will never have to compromise your design. So whether your plans call for cantilever beams in
balconies, cathedral roofs or high pitched roof slopes, Prolam I-Joists are the perfect choice.
An environmentally sound choice
In addition to being cost effective, Prolam I-Joists are also an environmentally sound choice because they are made of a renewable resource – wood. So they are a better choice for building.
Limitations of use – Prolam I-Joists
Prolam I-Joists are to be used in dry interior environments only, fully enclosed from exposure to exterior moisture. Prolam I-Joists are suitable for subfloor applications provided that the subfloor space is ventilated as per the BCA requirements. This means that Prolam I-Joists must not be exposed to environments where the equilibrium moisture content of the joist will exceed 18%. Prowood will not guarantee Prolam I-Joists that have been left
exposed to the weather either prior to or during construction for more than 90 days. Detailing such as cladding or lining must be used in moisture laden environments (commercial kitchens, bathrooms, wet industrial areas, saunas, swimming pool and spa rooms etc.) and constructed in such a way as to prevent exposure of the Prolam I-Joist to moisture. Prolam I-Joists may be used in applications which are often exposed externally (gable ends, eaves, floor joists applications in elevated houses, cantilevered joists etc.) but must be sufficiently enclosed with a suitable cladding, lining etc. to completely prevent the exposure of the Prolam I-Joist to moisture.
Prolam I-Joists can now be specified by Prolam Pro online specifier. Specify with certainty with our online calculator!
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