LVL

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LVL Ultralam™

From the ancient times, the tree was one of the most demanded and widely used construction materials. However, despite all its advantages, the wood has an entire range of significant drawbacks such as susceptibility to rotting, combustibility, geometrical instability under humidity variations, loss of strength due to knots and wood defects, insufficient density, limitations of linear dimensions, deformation in humid environments, checking, shrinkage etc.

All these drawbacks have always limited the scope of timber application in construction. But today, thanks to the new technologies, the wood is really getting a new lease on life. New hi-tech methods of wood processing have absolutely altered the properties of this material and enabled to create wood based products that multiply all the advantages of the wood and reduce all its drawbacks almost to zero.

These materials boast fundamentally new features allowing to use wood products in the applications one could only dream of before. It is these hi-tech developments that gave birth to laminated veneer lumber, a product of wood working industry manufactured as billets, boards and beams.

LVL (laminated veneer lumber) is a technologically enhanced and improved high strength structural wood based material. The complex technological process results in a homogenous material with unique performance. LVL properties significantly exceed those of solid wood, glulam and high-grade timber.

The main raw material used to produce LVL is wood veneer of various grades (wood species and mixtures thereof differ from manufacturer to manufacturer). Term “LVL” was introduced in 1960s by Wayerhauser (US company) who had developed this product and launched the first LVL production line ever.  Now LVL is rightfully considered to be the best wood material in terms of technology, reliability and performance.

Its outstanding properties place LVL among the most advanced and technological products currently used in construction.

LVL enjoys unique strength characteristics, for example, its MOE (modulus of elasticity) is 24% higher than that of solid spruce, while its MOR (bending strength) is twice as high. These physical characteristics ensure high bearing capacity of LVL products at smaller cross-sections which in its turn significantly reduces the total volume of required lumber.

These high characteristics are associated with a number of specific features of LVL production process that ensure the absence of natural wood defects in the structure of the material.

Due to its laminated structure and production technology, LVL is an entirely homogenous material with unchangeable mechanical properties lengthwise and consistent performance irrespective of seasonal factors.  That is, it’s a material with homogenous symmetrical structure that does not change its performance over its entire service life.

Apart from conventional timber materials, LVL products are capable of maintaining precise linear dimensions in spite of seasonal factors, variations in environmental and climatic conditions. LVL neither warps nor buckles when exposed to humidity, neither checks nor rots, offers minimum natural shrinkage and absorbs practically no moisture. Therefore, the dead weight of an LVL beam remains unchanged in humid environment.

The stability of LVL linear dimensions ensures high accuracy of adjusting parts which underlies durability and long lasting appeal of LVL structures as opposed to solid wood products susceptible to swelling and buckling. Apart from metal and reinforced concrete, LVL offers higher resistance to corrosive agents, such as water vapors, ammonium, salty vapors etc. That is why it’s indispensable in the construction of aquatic parks, swimming pools, agricultural and industrial structures.

LVL boasts better fire resistance compared to ordinary beams. This is achieved through multiple layers of veneer and less porosity of material. Phenol-formaldehyde resin is neutral to oxidation and doesn’t support ignition. High density and absence of cracks prevent from fire propagation and thermal effects inside the material. LVL test results demonstrate the ability of the material to maintain its properties within 30-60 minutes at 300°C. Under the specified temperature the beam undergoes slow charring at the rate of 0.6 mm/min flatwise and 1 mm/min edgewise.

LVL significantly improves and accelerates construction techniques making it possible to avoid welding and to use lighter lifting machinery at the construction site.

The price of LVL is a little bit higher than average prices for other timber materials.  However, LVL-based products maintain their geometry even in as much as ten years which, certainly, justifies the manufacturer’s costs. As opposed to such ordinary construction materials as metal and reinforced concrete, LVL boasts an optimal performance/weight ratio.

This factor is of special importance for low-rise construction, as with an adequate strength reserve, LVL-based structures do not require reinforced foundations and are easy to install, i.e. they can be moved on the ground and lifted onto upper stories without special machinery. As a result, LVL based buildings require much less money and time, as opposed to brick and concrete structures.

LVL structural and installation properties have ensured its widespread use in North America and Western Europe. The world wide proven technology of LVL-based prefabricated homes building enables to build energy efficient houses of any architectural shapes and sizes within the shortest time frames. And be it a modest country cottage or a large luxury mansion, they will have one thing in common: reliability, quality and comfort provided by the material specifically created for these purposes, the “superwood” LVL. 

 

Parameters

Technical Parameters of Ultralam™

Note: For the production of special batches of Ultralam LVL with high grade veneer layers (according to the specification), design strength values can be increased by 15 – 20%.

ConditionRelative to the GrainRbRsRXI
bending edgewise along the grain392726,519,523,5
bending flatwise along the grain4535,527,52422,5
compressionedgewise along the grain3025,523,519,522
compressionacross the grain54,33,56,83,8
compressionperpendicular to the plane of veneer sheets51,91,71,91,7
tensionedgewise along the grain2526,522,517,516,5
tensionacross the grain--0,7--
shear along the glue lineedgewise along the grain2,62,62,62,62,6
shear along the glue lineacross the grain1,11,11,11,11,1
 

Product line

Ultralam R
Thickness, mm27, 30, 33, 36, 39, 45, 51, 63, 75, 90
Width (height), mm64, 89, 100, 120, 150, 160, 200, 220, 240, 250, 260, 300, 360, 400, 420, 450, 500, 600, 1250
Length, mmFrom 2 500 to 20 500 (gradation - 500 mm)
Ultralam X и IX
Thickness, mm27, 30, 33, 36, 39, 45, 51
Width (height), mm64, 89, 100, 120, 150, 160, 200, 220, 240, 250, 260, 300, 360, 400, 420, 450, 500, 600, 1250
Length, mmFrom 2 500 to 20 500 (gradation - 500 mm)
Ultralam I
Thickness, mm27, 30, 33, 36, 39, 45, 51, 63, 75
Width (height), mm64, 89, 100, 120, 150, 160, 200, 220, 240, 250, 260, 300, 360, 400, 420, 450, 500, 600, 1250
Length, mmFrom 2 500 to 20 500 (gradation - 500 mm)
 

MOE Е, MPa. Strain along the grain

RbRsRXI
16 00015 60014 00011 00012 700
 

Service conditions for Ultralam™ based structures

Note: air humidity is allowed to differ from the tabulated value, if it persists for no longer than two weeks.

The products delivered to the Customer should bear a mark of the allowable service class

Service classMoisture content of structures during the usage, %Service ConditionsService ConditionsServiceability measures
Relative air humidity, %Air temperature, °C
110±240-6020±5Chemical protection is not required
220±260-9020±5Structural and chemical protection is required
3более 22без ограниченийбез ограниченийStructural and chemical protection is required
 

Types of Ultralam™

UltralamDescriptionApplication
RS / E15All veneers are located parallel to grain, G1–G2 grades (primary G1)Load-bearing structures
R / E14All veneers are located parallel to grain, G1–G2 grades (primary G2)Load-bearing structures
XThere are some crossplies, G2–G3 grades structuresLoad-bearing structures
I / E13, E12Both parallel and crossply veneers are possible, G3–G4 grades are possible, G3–G4 gradesFiller structures and parts for doors and furniture manufacturing
 

Ultralam™ LVL Advantages

Unique LVL Ultralam™ properties afford to list it among  the most prospective materials used for construction.
The application of LVL Ultralam™ covers a wide range of construction and not construction areas.

  • Environmentally friendly engineered wood material with unique performance.
  • Durability and long lasting appeal of Ultralam™ -based structures.
  • Unchangeable performance over the entire service life.
  • Homogenous material with unchangeable mechanical properties lengthwise.
  • Consistent geometry and physical properties irregardless of seasonal factors, environmental variations and climatic conditions.
  • High accuracy of adjacent elements.
  • High bearing capacity.
  • Resistance to corrosive agents.
  • Optimal performance/weight ratio.
  • High bio and fire resistance.
  • High thermal and sound insulating properties.
  • Material is easy to process with any cutting instruments.
  • Material is not subject to deformations caused by humidity variations and has low values of natural shrinkage.
  • There are almost no service costs related to LVL usage.
  • Convenient, easy and fast installation of LVL products.
  • With an adequate strength reserve, reinforced foundations and bearing structures are not required.
  • Price of Ultralam™ products does not depend on their length and cross sections.
  • Easy mechanical processing and preservative treatment.
  • Besides its high physical and mechanical properties, laminated veneer lumber fully retains the appearance of natural wood which allows to use LVL-based products and structures in interior applications without additional finishing.
 

Certificates

Ultralam™ 2.0E/2900 PSI receives approval in the U.S.

DrJ Engineering has certified Ultralam™ LVL 2.0E/2900psi for usage in structural applications in the United States. Recently, a full series of ASTM D5456 testing were performed using SBCA´s certified test facility, the SBC Research Institute (SBCRI). The third party QC inspections by PFS Corporation, have found the MLT LTD Taleon-Terra production to be consistently in compliance with ISO 9000 and ISO 17020 procedures.
The DrJ Engineering Evaluation Report TER 1203-02 can be found here.
Sealed Report for each State (except CA, NV, and HI) can be found here.

MLT LTD becomes the first Russian member of U.S. structural building components association

MLT LTD joins the U.S. Structural Building Components Association (SBCA) and becomes the first and only Russian company to do so. This move conicides with the company’s entry into the U.S. and marks the first introduction of its’ Ultralam(tm) 2.0E/2900psi LVL to the American market. As a new member MLT will participate in The Building Components Manufacturers Conference (BCMC), an SBCA event held in Charlotte, NC on October 7-10. Number of SBCA members have already expressed interest, and negotiations are underway with several potential clients about trial deliveries of the product.

You can visit us at BCMC-2014 in Charlotte, NC on October 7-10, at Booth 328.