Low cost Glulam Portals have been successful in achieving a total saving of up to 13% in comparison to standard steel frame structures, when compared to the. Glulam frame of a roof structure. Glued laminated timber, also called glulam, is a type of structural engineered wood product The result was the first glulam portal. In , Hetzer moved his company to Ettersburger Strasse, still in Weimar. Key words: construction design, structure, three-pinned frames, long-span, . Glulam portal frames (reproduced from Handbook 1 – Timber structures. ).

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After planing of the sides, the finished width is a few millimetres less than the width of the laminates. Only glues of which the industry has long-term practical experience are used.

Automatic finger-jointing machines help cut the finger joints, connect and glue them together under pressure, allowing for a strong, durable joint, capable of carrying high loads comparing to natural wood with the same cross-section.

The development of resin glues contributed to the wide use of glued laminated timber construction. Leading architects all over the world have demonstrated their credentials with spectacular glulam constructions. International Journal of Life Cycle Assessment Joints with casein glues struggled with detachment due to inherent stresses in the wood.

The roof of the Centre Pompidou-Metz museum is composed of sixteen kilometers of glued laminated timber. Charcoal biochar Firelog Firewood Pellet fuel Wood fuel. The glue used in glulam manufacturing has documented high strength and durability under long-term loading. The appropriate class is determined by the strength of the timber used and its position in the cross-section. By laminating a number of smaller pieces of lumbera single large, strong, structural member is manufactured from smaller pieces.

An appealing aesthetic appearance which acts as a valuable addition to the interior and exterior environment. Glulam is one tenth the weight of steel and one sixth the weight of concrete — the embodied energy to produce it is one sixth of that for a comparable strength of steel. Glue type I may be used for glulam construction in any climate class, while glue type II is limited to climate classes Long life in chemically demanding environments.


Glulam has been successfully used for pedestrian, forest, highway, and railway bridges. The high strength and stiffness of laminated timbers enable glulam beams and arches to span large distances without intermediate columns, allowing more design flexibility than with traditional timber construction.

Glulam also has a better strength to weight ratio than steel.

The invention of cold-curing synthetic resin glues in “Kaurit” solved these problems – resin glues, which are inexpensive and easy-to-use, are completely waterproof and enable high adhesive strength. The first industrial patented use was in Weimar, Germany.

Glued laminated timber

High resistance to fire — often a requirement in public buildings. Architectural design and construction No other building material can be compared with glulam for expressing architectural or structural possibilities.

Free spans of over m have been built.

The architect Frank Gehrysuggested a design with large double-curved Yellow-Pine Glulam beams, and the ice rink was constructed in Here is an example of Swedish glulam cross-sectional dimensions below.

From Wikipedia, the free encyclopedia. A significant development in the glulam industry was the introduction of frmae water-resistant phenol-resorcinol adhesive in American Institute of Timber Construction. Framd inhe took out a series of patents. Modern glulam technology Wood is fra,e of the oldest construction materials in the world. A high strength to weight ratio, enabling wide spans.

Because of their composition, large glulam members can be manufactured from a variety of smaller trees harvested from second- and third-growth forests and plantations.

In contrast with laser cutting machines, the cost-effective CNC machines carve the material using mechanical tools, like a router. CAT 5 hurricane-resistant log houses are built of glulam timber [20]. In North America the material providing the laminations is termed laminating stock or lamstock. Portal frames can have curved or finger-jointed haunches.

Glulam construction

Glulam — glued laminated timber — opens up still further possibilities for wood building technology. Glulam has much lower embodied energy than reinforced concrete and steel, although it entails more embodied energy than solid timber. Journal of the Fame Local History Portall. This means that glulam beams can span large distances with a minimal need of intermediate supports.


Glued laminated timberalso called glulamis a type of structural engineered wood product comprising lortal number of layers of dimensioned lumber gulam together with durable, moisture-resistant structural adhesives. A glulam frame can carry its full load immediately after the assembly. The use of finger joints with glulam allowed for production of glulam beams and columns on large scale. No other building material can be compared with glulam for expressing architectural or structural possibilities.

The roof of the Richmond Olympic Ovalbuilt for speed skating events at the Winter Olympic Games in Vancouver, British Columbiafeatures one of the world’s largest clearspan wooden structures. It also means architects and engineers have virtually unlimited possibilities when pottal their own constructions in glulam, whether the task is a small house, the roof of a department store or a road bridge.

However, the laminating process allows timber to be used for much longer spans, heavier loads, and complex shapes. When glued laminated timber was introduced to the building technology in the early twentieth century, casein glues, which are waterproof but have low shear strengths, were widely used. Furthermore, when using glulam it is possible to obtain larger cross-sectional dimensions and longer lengths than solid construction timber.

Since the year ofThe United States have been operating the glulam manufacturing standards. It was built as the replacement of the Cathedral of St. Disney Development Company desired to build an aesthetic ice rink with less cost, and glulam was one of the most qualified materials in order to meet the owner’s requirement.

For larger buildings, two or three pin trusses, portal frames or arch frames of glulam components are suitable.

The strength and stiffness values of the various strength classes are then framr in the code. The da Vinci Bridge in Norway, completed inis almost completely constructed with glulam.