Our Kwila Glulam 17C is manufactured to the AS/NZ standard and can be used in place of HyOne or where GL17c is required.
On the Scales
Being a hardwood the Magna Glulam is only 50% heavier than the Pine beams builders are able to cut these using standard tools. An ideal alternative for flitch beams or steel in most circumstances.
Our Kwila Glulam is naturally durable so treatment is not needed while meeting the strict New Zealand building codes.
Glue laminated beams (Glulam) are solid wood members manufactured by bonding multiple pieces with proven adhesives to form a larger structural member. Glulam is more uniform and offers improved structural performance over sawn timber.
Lumberbank distributes Kwila GL17c manufactured by Magna Glulam located in Penrith, New South Wales, Australia, a licenced plant in accordance with Australian Standards under a very strict third party audited quality assurance System provided by the Glue Laminated Timber Association of Australia. This product is harvested from legal forests certified by the Forest Stewardship Council.
The small pieces of Kwila used to make Magna Glulam are kiln dried to 12-16% prior to gluing which means that even the biggest beams and posts have the same moisture content from core to the surface. This factor makes glulam less prone to distortion and moisture sweating than solid timber in large sections.
We stock the Kwila Glulam in the following sizes:
|Thickness (mm)||Widths (mm)|
|85||240, 260, 300|
These are available in lengths 4.8 – 7.2m please check what’s available and lead times with our team.
Lintels, Roof Beams, Floor Beams, Bearers
|Standard Trade Names||Kwila|
|Origin Of Product||Australia|
|Density||800 Kg/m3 @ 12% m.c.|
|Durability||Class 1: Durable|
|Modulus of Elasticity||E||GPa||16.7|
|Modulus of Rigidity||G||MPa||1110|
|Tension parallel to grain||(f’t)||MPa||21|
|Compression perpendicular to grain||(f’p)||MPa||15|
|Compression parallel to grain||(f’c)||MPa||35|
|Shear in Beam||(f’s)||MPa||3.7|
Cuts, Penetrations, and Chamfers
A taper cut of chamfer must not exceed 0.15 of the beam span without nail plate reinforcement. The minimum depth remaining for the Glulam at the support must not be less than half the original depth of the beam.
Timber glue-laminated (glulam) beams with a “C” suffix designates a vertical camber radius of 600m. An “S” suffix designates a straight beam profile.
Alignment tolerance of both straight and cambered beams shall be no more than 1mm per metre of beam length. Cambered beams are generally supplied with a marking stamped on the top edge of the beam. Unless specifically requested (such as for large cantilevers), cambered beams should not be installed with the camber arch facing downwards.
|Beam Length (m)||4.8||5.4||6||7.2||8.4||9.6|
Kwila is a hard timber rated 2 in a 6 class scale so consequently it withstands knocks and daily wear and tear far more successfully that timbers such as Radiate Pine and Western Red Cedar and has natural durability.