Produced by a licensed manufacturer in accordance with Australian Standards AS1328 which requires manufacturers to maintain third party audited quality assurance, the Magna merbau plants has systems monitored by the Glue Laminated Timber Association of Australia. This involves periodic factory visits and regular structural testing in-house and also by the GLTAA. They are also covered by a 15 year manufacturers warranty.
Magna Glulam is perfect in all weather conditions, proven to survive in shaded or exposed areas. Exposure that are even classed as Service Class 3. This is because merbau magna glulam is manufactured from a highly durable timber using an exceptionally strong bond adhesive Resorcinol. Merbau timber products are also resistant to termite attack.
GLULAM SERVICE CLASSES
Service Class 1: Environmental conditions not to rise above an EMC of 12% in service
Service Class 2: Environmental conditions with EMC rising up to 20% in service
Service Class 3: EMC will surpass 20% in fully exposed structures bridges, pergolas
The high strength of Magna Glulam has been established by initial qualification testing and is checked by daily production testing at the plant. All timber beam sizes were determined to be GL17 and the timber posts are classified as either GL17 or GL13 depending on section size.
Merbau timber has low shrinkage rates (2.5% tangential & 1.5% radial), which means that Magna Glulam stays as intended in exposed conditions. It also means that Magna Glulam is much less susceptible to cracking and splintering.
According to the department of agriculture and fisheries on Kwila, merbau is rated class 1 in timber durability and has a life expectancy of over 40 years for above ground use. According to the
AS 3959-2009 Merbau timber is also considered bushfire resistant, allowing builders
to choose merbau for construction in bushfire – prone areas.
Only legal and sustainable timber is used to make Magna Glulam. ETH’s factory was one of the first in Indonesia to embark on the Smartwood program of the Rainforest Alliance (which commits suppliers to achieving FSC status in a defined time-frame). The second stage, Verified Legal Compliance, was achieved in 2014. FSC certification was achieved by the forest concession holder in August 2018.
One thing to be aware of with merbau timber is that it is prone to tannin-bleed when in contact with water and should be kept dry at all times prior to coating with a deck oil or paint. Once coated, bleeding is significantly reduced. However, care should still be taken when installing merbau timber above or near lighter coloured paving or walls.
Australian based business the HR Design Group have created the below Span Tables for Magna Glulam products based on the relevant Australian Standards.
Magna Product Information and Complete Span Tables (file approx 5 MB)
Individual Span Tables below