AS/NZS 4357 Structural LVL Timber

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Short Description:

Laminated veneer lumber (LVL) is an engineered wood product that uses multiple layers of thin wood assembled with adhesives . Formwork LVL beams are designed for the high load-bearing and corrosive environment of the concrete formwork industry and are used as formwork bearers, joists, soldiers and walers. The slow growing plantation timber veneers make e-form one of the highest load bearing formwork LVL beams in Australia. A high wax loading in the moisture-repellent coating improves its dimensional stability and extends its life and cost effectiveness.

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Product Description of AS/NZS 4357 Structural LVL Timber

Full Pine LVL beam, LVL framing, LVL rafters or Strand lumber/Engineered lumber/Wood beam of engineered wood for LVL moulding Structural LVL

HW structural laminated veneer lumber (LVL) which has been manufactured in accordance with AS/NZS 4357 with properties determined in accordance with AS/NZS 4063.2 and therefore complies with the requirements for structural design in accordance with AS1720.1

HW LVL terminator is available in all sizes and is part of the Carter Holt Harvey Terminator range. HW H2-S Terminator is treated against termites south of the Tropic of Capricorn. The treatment is applied to the glue-line during manufacture to achieve full termite protection to the core of the beam. No further sealing is required on cut ends, holes or notches. Other treatment levels are available from suppliers on request, but treatment is limited to above ground use. hySPAN cannot be readily treated for in ground contact applications.

HW LVL is manufactured using an 'A' Bond with less than 0.5mg/l Formaldehyde (equivalent to E0) emissions from the final product.
laminated veneer lumber type structural lvl
For quality assurance the HW range is manufactured with independent audit processes and product certification. Carter Holt Harvey ensures that its wood is legally sourced from managed forests and offer FSC 'Chain of Custody' certified upon request.

HW LVL is produced with a structural grade face and is not generally used in appearance applications and at the time of dispatch from the manufacturing site has a moisture content of between 8-15%.

Size Range

SIZE	35mm	45mm	63mm	75mm
90 mm		A	A
130 mm	A	A	A
150 mm	A	A	A	A
170 mm	A	A	A
200 mm	A	A	A
240 mm		A	A
300 mm		A	A	A
360 mm		A	A
400 mm		A	A	A
450 mm			A
525 mm			A	A
600 mm			A

Advantage of AS/NZS 4357 Structural LVL Timber

Small logs can be made into large dimension LVL products.
Long lengths of LVL are available up to 12m
The wood resource can be optimised by grading and selecting veneer for different parts of an LVL cross section and making a range of products with different properties.
Structural properties of LVL are very uniform because the randomised layers of thin veneers are pre-graded for stiffness (coefficient of variation for modulus of elasticity less than 5%).
LVL members have high strength because of the low variability and randomised wood properties in thin layers.
LVL can be cut and machined with normal woodworking tools.
LVL is often used to complement the use of sawn timber in domestic construction.

Application of AS/NZS 4357 Structural LVL Timber

LVL is particularly well suited to the following applications
Rafters and joists
Lintels, beams and framing members
Truss chords
Portal frames
I-beams
Box-beams
Scaffold planks
Formwork
Panels of LVL are cut into structural members which have high strength and stiffness.
LVL is suited to structural applications such as beams, rafters and columns in a wide range of buildings including houses, commercial, industrial and rural structures. Some special LVL has a small number of veneers laid perpendicularly (cross banded).
In commercial or industrial structures it is often used as a wood-based alternative to structural steel or reinforced concrete.