Innovative products from glulam used in construction
28 of November 2013
Russia, Moscow, MVC Crocus Expo
Organizer: LesPromInform magazine and Central Scientific Research Institute for Building Structures named after V.A. Koucherenko (TSNIISK)
Around 100 people took part in the conference. They were from 50 companies form such countries as Russia, Finland, Germany and Italy: producers and suppliers of equipment and glue production, woodworkers, builders of wooden houses, as well as representatives of the trade associations and institutes. Specialists from TSNIISK, Weinig, Fill, MetsaWood, 78 DOK N.M., Volosovo LPK (INOK), AkzoNobel, PRO kleim, SCM Group, Springer, and Minda.
The conference was started by a moderator, head of a laboratory of wood-based structures of TSNIISK Alexander Pogoletsev. He was holding the speech about innovations in glulam for builders. He meant boards from solid wood, including cross-laminated timber, LVL-based structures, light structures Kielsteg type, glue-beam and large-span beams made from glulam. The same products were concerned in the rest presentations.
Multilayer glue boards, produced from solid wood, are considered to be the newest technology presented on the event. They represent panels that consist of external layers with the parallel fibers and one internal layer minimum with perpendicular fibers towards the external layers.
There are only a few producers on the just started Russian market. Volosovo LPK (INOK) represented its products for the first time on the conference. These boards might be used as envelope buildings in wooden house construction, as well as in interior designing. Production technology of such boards is much similar to production technology of CLT (known as X-Lam in EU countries), but they are not counted for bearing power. Participants of the conference were able to get information about equipment, used in Volosovo LPK, and delivered by the main supplier - the company Fill. One key important supplier AkzoNobel, producer of glue systems, told about the newest technologies of timber gluing, used in production of multiple-layer boards.
There are no industrial CLT in Russia so far, pilot batches are issued though. Equipment for CLT production was presented on the conference by the following companies: Weinig, Fill, SCM Group, Springer, and Minda. For example, Minda showed quite an interesting development - light structures named Lielsteg, which might be used as interfloors for spans up to 27 meters length.
Representatives of Metsa Wood were speaking about production technologies, fields and practice of LVL application in the foreign and domestic building industry, and about obstacles of widespread adoption of LVL on the Russian market. LVL (Laminated Veneer Lumber), or beam glued from veneer, is considered to be a structural material, produced by the way of pasting together several layers of rotary-cut soft wood veneer 3 mm thick. Wood fibers of adjacent layers are parallel in LVL, what distinguishes it from plywood. LVL is produced in the shape of beams and boards of a wide-size range. It is used as power beams and boards for interfloors, chevrons, frames and trusses of industrial buildings, supporting columns, structure elements of wooden building, and etc. LVL-beam length might be up to 15 meters, when maximum length of a solid beam is 6 meters long. Besides that, LVL exceeds the regular sawn timber by the following characteristics as straightforwardness, dimensional accuracy, bending and breaking strength, and etc.
LVL structures are invading in the developed countries; there are some examples of use in Russia.
Glue wooden structures, or glulam, are widely used in the construction of industrial buildings. The maximum length of glulam supporting joist is limited by transporting possibilities from factory to construction site and is about 30-40 meters. The large-span glulam is irreplaceable for houses with high humidity (water-pools, aquaparks, sport halls, and etc.), and with corrosive medium (for example, chemical depots), and may successfully replace ferroconcrete, and metal structures in any other industrial, and public objects. Glulam advantage is a significantly low weight and ease of processing. However, imperfection of legislation in projecting and building, and unwillingness of the contemporary planners to master new technology imped wide introduction of the glulam technology in Russia. The company 78 DOK N.M. successfully working on the glulam market, was speaking about the practice of large-span glulam.
At the end of the conference an open-door meeting of the Working group RG 4.6 ÒÊ 465 upon developing norms and standards in the field of wooden structures was held. The participants were hectically discussing the proposed projects of future State Standards during two hours, and the following discussion was decided to prolong on the 19th of December 2013 on the TSNIISK area.
The participants were Klebchemie, Limab, Vologda LDK, Dobrykh Del Master, Domwerk, Jowat, Klisko Plus, RusBrus Company, BG Corporation, Lesplitinvest, Mayr-Melnhof Holz Efimovskij, Plitspichprom, PSK Narkhozstroj, Russian Timber Pellets, Building Company Rus, Siberian Plant of Low-Rise Houses, Siblesproject, Talion Trading, TAMAK, HOMA, Eco-Triumph, Jamal Timber-Processing Complex, and etc. Many of them had participated in LesPromInform events before.
Conferences and seminars organized by LesPromInform