PROLAM beams are CCA H3.2 or H1.2 treated as defined by NZS 3640:2011, H3.2 must be used for weather exposed applications, such as verandah beams, deck bearers, and subfloor applications.
PROLAM treated to H1.2 is only suitable to be used in the building envelope as in NZS3604.
Product Quality -All Prolam glulam beams are manufactured in accordance with NZ building code standard AS/NZS 1328 Glue Laminated Structural Timber standard.
Fire Safety -Extensive fire test data shows that large end section timber performs well in fire situations due to the formation of a protective layer of char which usually occurs at a temperature around 250°Celsius. This charred area inhibits the effects of the fire on the inner portion of the timber component, hence it maintains structural load support for measurable periods of time as the fire progresses.
Renewable Resource -Wood is the only truly renewable building material, making it the preferred sustainable choice in NZ house building. Prolam is made from New Zealand plantation timber and as a wood product, acts as a carbon sink. It also reduces energy use in existing buildings with its outstanding insulation properties. The plantation timber used for manufacturing takes 14 times less energy to produce compared to the equivalent steel beam.
Chemical resistance – Glulam works well in harsh environments, for example in corrosive chemical stores, fell-monger, acid plants, salt-water environments and swimming pools, as it does not rust and the glues used are service class 3 certified.
Designers see a great benefit of using Prolam beams for non-visual structural elements such as lintels above garage doors and windows.
Prolam is lighter than the traditional Flitch beam and can be handled easily without the use of a crane. The high strength-to- weight ratio of Prolam enables the beams to span greater lengths, they have great stability when used for rafters and beams.
Prowood’s popular online software program with over 3000 registered users www.prolamnz.com