Nailed truss constructions - superior economic efficiency
· individual and safe· cost-effective
Nail plate timber frame constructions are complex interconnected roof beam systems with varied possible uses in the design of roofs and walls in residential and commercial buildings, in auxiliary structures, for formwork and scaffolding, and in special constructions.
Nail plate constructions, also called nailed trusses, are timber frames constructed of dry, local wooden beams that do not require elaborate joints. Steel plates (nail plates) with angled nail-shaped punch-outs are pressed hydraulically into the wood in the factory, where conditions are optimal, so they maintain their shape for a long time.
The low weight and material-efficient construction, even in roofs with a wide span, ensure that this is a cost-effective and economical construction technique.
Today the construction industry demands a high degree of flexibility from everyone involved in order to achieve optimal results when it comes to utilization, economic efficiency and construction ecology. Good architecture that fulfils individual requirements regarding room arrangements, versatility and design requires an understanding of which building components are economical and which components can make individual design requests possible.
Nail plate constructions are those components. The frameworks are industrially produced according to the specifications of the property, but industrial production does not mean elements have to be standardised. On the contrary, special structures can also be manufactured economically and quickly.
In Germany, various types of nail plate have been officially approved by the building authorities since 1967. But in other countries this type of construction has a much longer history. Its wide range of uses - for walls and roofs in residential houses, industrial, commercial and agricultural buildings and municipal constructions, for flat roof renovations and auxiliary structures with formwork and scaffolding - is testament to the versatility of this building technique.
Wood is the only sustainable building material and also the only one that binds atmospherically-damaging carbon dioxide (CO2) as it grows. The long-term use of timber in construction therefore makes good ecological sense, because it means the carbon dioxide remains bound in the wood even longer. According to research by the German Federal Environment Agency, out of all building materials timber requires the least energy to manufacture, transport and process, calculated per cubic metre of ready-to-install building material. In addition wood has a good thermal insulation value, which leads to further energy savings when using timber. Timber is recognised as a hygienic, ideal building material for homes.
Thanks to industrial production and computer calculations, even custom shapes can be cheaply manufactured as nail plate constructions. The savings compared to conventional construction techniques can be up to 30%.
As frameworks, nail plate constructions are light, making them easy to transport and handle, or to pre-assemble as roof segments. The rapid assembly time reduces the total build time (which reduces construction costs) and protects the building shell against rain once the roof has been covered.
According to DIN 1052 and as authorised by the Institute für Bautechnik (Institute for Construction Technology) in Berlin, nail plate constructions are approved for self-supporting structures up to a span width of 35 m. As such they offer considerable freedom when it comes to floor plan design and versatility in room arrangements. However, the trusses themselves can be longer if cantilever extensions at one or both sides of the building are required.
The majority of possible shapes, like parallel trusses, gable roof or triangular trusses, mono-pitched roof trusses, scissors trusses, attic trusses and wall elements, can be used in every type of private, commercial and public construction.
According to DIN 4074, the timber used must be at
least in grading class S10.
Wood moisture must not exceed 20% at the time of construction.
The most important thing is a short construction time.
The high degree of pre-fabrication, with efficient, optimised workflows, is not the only reason nail plate constructions are so economical. The custom, weather-independent production process also yields a precisely calculable time advantage.
We deliver components to the construction site on time, and our qualified employees can oversee assembly on request. Short assembly times and efficient production processes lead to surprisingly attractive prices. Our experienced and qualified engineers and master carpenters will be happy to advise you about all types of construction projects.
Nailed board trusses, composed of boards nailed together, were most widely used after World War II, for reasons including cost, availability of material and the amount of material required for solid wood trusses. Nowadays, the creation of complex nail patterns and the ability to pre-bore the nail holes has led to the use of nail plates. Nail plates are 1-2 mm thick strong steel plates with nail- or claw-shaped punch-outs that are angled on one or both sides. They are pressed into the wood with hydraulic presses. The original nail plate was patented in Berlin as a 'pronged plate' way back in 1891.
It goes without saying that we will draw up a verifiable structural analysis for the roof, including position plans and detailed drawings, which will enable fast and problem-free assembly.
Gable roof trusses (triangular
For all roof shapes with a span width up to 35 m. Gable or hipped roof constructions. This type of truss is suitable for low roof pitches and cannot be extended.
Gable roof trusses (triangular
enable a variety of roof pitches. The option of shortening one side makes this type of truss especially useful for constructions where the surrounding buildings are very close.
These cannot be extended and are placed as self-supporting structures on top of the outer walls. They are especially suitable for wide buildings with central supports,
where two mono-pitched roofs can be placed opposite each other. However, they can also be used individually, e.g. for shelters or lean-tos.
Suitable for stables, multi-purpose halls and commercial properties. The shape of the bottom chord enables a larger vertical clearance and improves the indoor climate.
These can have a horizontal or slanted top or bottom chord. Suitable for flat roofs or buildings with a large span width. Often used for wind bracing and reinforcement.
Suitable for residential buildings in terraced or prefab houses, system constructions, etc. They do not restrict ground plan design, and can be easily extended at a later date while maintaining the same roof shape.