LVL （laminated veneer lumber）used for construction

Laminated veneer lumber (LVL) is an engineered wood product used in a diverse range of building and bridge construction applications. LVL beams, columns and panels have become established as essential components in modern timber construction due to their numerous advantages, versatilit and proven structural performance.

LVL is made of thin veneers bonded together with weather-resistant phenolic adhesive. This means that the dimensions of the final LVL product are not limited by the dimensions of the raw material, and even small-diameter logs can be used to produce large LVL beams and panels. When veneer logs are peeled to produce veneer, any natural defects in the wood, such as knots, are dispersed as small fragments across the veneer. This, together with the lamination effect, eliminates the impact of defects and results in exceptionally homogeneous material properties. Although the production costs of LVL, like all engineered wood products, are higher compared to sawn timber, with LVL the same constructions can be designed with smaller dimensions and LVL can also be used for applications where suitable sawn timber sizes are not available.

HC LVL product meet the requirement of AS/NZS 4257.0 standard. The certification was identified by Benchmark. The number is BMP721202.

With a three tier quality control program comprising; a detailed ‘Manufacturing Specification’ adhered to by trained staff; more than ten years experience quality control teams; and regular, detailed and recorded in laboratory testing on key quality requirements. HongCheng provides assurance of quality and consistency. All veneer in the manufacture is certified Forest Stewardship Council (FSC) from sustainable forests. The FSC number is BV-COC-145384.

Use examples                      

Beam / Framework / Roof, floor and wall panel / Doors and parts for the automotive industry / Scaffold board

Our LVL is produced in a continuous layup process from 1.7 mm veneers. This process optimally produces fairly thin, but wide and long beams, panels and studs cut from 1200-2500 mm wide billets. Maximum lengths 8 m depending on the production line. Due to the continuous process, the length can be individually specified for each billet. The minimum length is however limited to 2000 mm due to handling in the production process, so shorter components need to be cut separately. Standard widths are defined to minimize waste and to complement the dimensions of other building structures.

The thickness to height ratio of LVL standard beams is limited to 1:8 to ensure dimensional stability in normal building site humidity conditions. Weather exposure on one side of a beam may lead to cupping of higher beams. Here is our standard sizes available, these sizes are thus usually available in the shortest delivery times. LVL is easy to cut, so custom sizes are possible on separate request, making it an attractive option for many building systems. A more slender beam thickness to height ratio can be used if moisture conditions are controlled throughout the whole production chain, e.g. in off-site production of wooden roof elements for hall constructions. 

TOLERANCES

Unless stated otherwise by the customer, the dimensions of structural LVL,measured in accordance with AS/NZS 4357.1,shall not differ from the manufacturer's nominal dimensions by more than the following tolerances:

(a) Thickness …………………………………………………… +4, 0mm.

(b) Widh,up to 400mm …………………………………………… +2, -0mm.

(c) Width,over400mm ……………………………………………… +5, -0mm.

(d) Length…………………………………………………………… -0mm.

Frank Ding

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