[Special Feature] Commitment to Wooden Building Structures

Using the natural warmth of wooden structures to create medium- and large-scale buildings The Summit HR Construction System for wooden bi-directional rigid-framed structures harnesses the natural qualities of wood, while enabling wide opening and large space structure equal to RC or Steel Structures

Approach to Wooden structure

Wood is an environmentally friendly building material that can be almost permanently regenerated through the process of planting, growing and logging. When forest cycles are able to operate effectively, they also perform a wide range of other functions, including preserving land, protecting the watershed and preventing damage from landslides.
In other words, growing and using trees helps to protect the earth. The Act for the Promotion of Use of Wood in Public Buildings was brought into effect in 2010. Not only has the government taken a proactive step towards using wood, but local authorities and private companies have also started to get behind this initiative.

Summit HR Construction System for wooden bi-directional rigid-framed structure

SMBKZ has been working to promote the natural qualities of wood, lumber and wooden structures.and reached to development of the Summit HR Construction System for wooden bi-directional rigid-framed structures.
As wooden structures usually require features such as braces or bearing walls,RC or Steel Structures was widely used for facilities buildings with wide openings or large spaces, such as public facilities.
As the Summit HR Construction System for wooden bi-directional rigid-framed structures uses joints with the same rigid frames as RC structures, loads can be supported with columns and beams only,without use for braces or bearing walls. This makes it possible to create spaces with a real sense of openness using wooden structures.

Wooden structures maintain harmony with their surroundings

Buildings with wooden structures maintain harmony with their Japanese surroundings.
Retaining a sense of the old post town Sekijuku on the route from Tokyo to Kyoto, along which it is located, Kameyama Municipal Seki Junior High School recreates the look of a streetscape from days gone by. The school's multi-purpose hall is made primarily from cedar wood cut down within Kameyama, creating a space that children love to use.

Structures can also be made from locally produced wood

When a new policy was introduced, stating that larch from local forests should be used as structural members in government buildings that had previously been planned with RC structures, Ashoro Town decided to retain the RC plans for its town office but instead switched to a wooden structure using the Summit HR Construction System. With no braces even in work spaces, the result is a large open space infused with the natural textures of wood.

Aren't you worried about wooden structures because they burn easily?

As the cross sectional area increases, wood actually becomes less flammable. Making the most of this characteristic, "fire-resistant design" (Building Standards Act, Notice 1901/1902 of 1987) is a technique whereby a surfaces are designed to be thick enough to merely char for a certain length of time, so the burning building remains supported until fire-fighting activities can commence. Using this technique, wooden framed buildings can be classed as quasi-fire-resistant structures.
Moriya Elementary School, one of the largest in the country, has incorporated fire-resistant design into its structural columns and beams, made from laminated wood. The resulting wooden structured school building is full of the natural warmth of wood.

Reliable design

The Summit HR Construction System produces rigid-framed structures with sturdy joints that form almost equal to rigid connections, making the building earthquake proof. It is also an effective defense against salt corrosion, because there are no joining metal plates exposed to the outside.
Matsushima Office in Kamiamakusa is the first entirely wooden structured three-floor government building in Japan. Despite being built on the coast, its frame has an importance coefficient of 1.25, the benchmark by which earthquake safety is determined, and functions as a regional disaster prevention facility.

Wooden  building  structures can also be used as roofs for RC structures

Rikubetsu Elementary School has a mixed structure, with RC walls and a wooden roof. It features a lattice of beams made from laminated wood of varying sizes, creating a curved arch-like frame with three peaks, echoing the school's beautiful natural surroundings. The result is a dynamic space in which you can really feel the natural warmth of wood.

Growing numbers of medium- and large-scale wooden structured buildings

In addition to public facilities, more and more private facilities are being built from medium- and large-scale wooden structures lately. As a local company, Kitami Shinkin Bank used locally produced materials for its Mombetsu Branch. The building has a "tri-hybrid" structure taking advantage of three different material wood, reinforced concrete and steel. It then uses curved laminated lumber for large sections. It is made from locally produced larch and designed to resemble the shape of a scallop, regarded as a local specialty. With facilities such as a long distance bus terminal in the surrounding area, it is in a location with lots of passing traffic, both pedestrians and vehicles, and has been embraced by local residents as a symbol of their community.

Wooden structures continue to evolve, with every passing day.

If you are planning to constructing a medium- or large-scale building and have been thinking of using a steel or RC structure, why not consider building with the natural warmth of a wooden structure instead?
SMBKZ provides total support for wooden structures, from optimum solutions to structural calculations, material procurement and construction management. SMBKZ is committed to exploring the endless possibilities of wood, and will continue to help create spaces that are user and environmentally friendly, safe and comfortable.

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