三井ホーム List of Products and Services

The wooden structure insulated composite panel "Double Shield Panel (DSP)" is a structural insulated panel that sandwiches a core material made of expanded polystyrene (EPS) between structural face materials made from laminated hardwood chips (OSB). It boasts excellent structural strength and is available in sizes up to 1,820×6,000mm, making it widely used in large-scale construction. Its wood usage rate is about half that of conventional wooden structures, contributing to the protection of forest resources. 【Features】 ○ Short construction period: Simplified processes make it easy to install ○ High strength: No intermediate support required for spans over 5m ○ Large spaces: Easy to handle regardless of construction method ○ High insulation and fire resistance: Insulated at the roof rather than the ceiling / Certified for quasi-fire resistance ○ Environmental consideration: Acquired F☆☆☆☆ rating For more details, please contact us or download the catalog.

The "Wood Big Span Method" allows for the realization of large spaces such as warehouses and factories using wooden structures, thanks to high-durability and high-strength wooden trusses. Furthermore, it excels in thermal insulation, contributing to improved air conditioning efficiency, and by using a "wooden exposed finish," it also provides humidity control. 【Features】 ■ Low thermal conductivity prevents heat intrusion in summer and enhances heat retention in winter ■ The structural components are lightweight, resulting in smaller design loads for foundations and lower ground bearing capacity ■ Short depreciation period and low dismantling costs ■ In addition to Canadian S.P.F. lumber, it is also possible to switch to domestic timber *Currently offering a "Construction Case Collection"! Please check it out via PDF download.

Wooden warehouses are full of charm. The characteristics of wood lie in its excellent livability. The properties of wood make it difficult to warm up in the summer sun and hard to lose indoor heat in the winter, which is particularly noticeable when heating and cooling systems are off. Additionally, if specified, domestic timber can also be used. Since the structural body is lightweight, the design load for the foundation and ground bearing capacity can be minimized. We not only design and manufacture connected trusses and wall panels but also provide structural design for the entire building. Our construction team offers specialized support from construction planning to execution and inspection, focusing on framing work and drywall installation, as well as general construction work. 【Features】 - We adopt highly durable and high-strength wooden trusses, enabling the construction of long spans (large spaces) that were previously thought impossible. - Compared to steel and reinforced concrete structures, wood has excellent insulation properties, allowing for reduced operation periods and lower temperature settings for heating and cooling, thereby lessening the environmental impact. - Using wood in construction helps reduce CO2 emissions in the surrounding environment and contributes to the prevention of global warming. - There are also case studies of its use in commercial warehouses. *For more details, please refer to the PDF materials or feel free to contact us.

The strengths of wooden construction lie in its "high cost performance" and "short construction period." This document provides a detailed explanation of the advantages of wooden (two-by-four) construction. Based on the Ministry of Land, Infrastructure, Transport and Tourism's construction start statistics report, we compare the construction unit prices of wooden, steel, reinforced concrete, steel-reinforced concrete, and concrete block structures to demonstrate the superiority of wooden construction. [Contents] ■ Construction unit prices of each structure type and the economic rationality of wooden construction as seen from the construction start statistics report ■ Specific advantages of warehouse planning compared to steel and reinforced concrete structures ■ Useful life of major depreciable assets by structure and use ■ Advantages that can be inferred from fluctuations in market prices of steel and wood *For more details, please refer to the PDF document or feel free to contact us.

We are pleased to announce that our wooden single-story warehouse, "Smart Warehouse (trademark application in progress)," has received the Good Design Award for 2018. Moving forward, we will continue to strive for new initiatives to expand the use of environmentally friendly wood, as well as work towards improving Japan's industry and living culture, which the Good Design Award aims to promote. 【Smart Warehouse Features】 ■ Lightweight ■ Short construction period ■ Low cost ■ Seismic resistance grade 3 strength ■ Uses environmentally friendly wood *For more details, please refer to the PDF materials or feel free to contact us.

The "G Frame Construction Method" creates a large opening of approximately 7.3 meters. It allows for various dream living spaces, such as an open living area with one wall entirely made of windows for a semi-outdoor feel, or a wide built-in garage that can accommodate three large vehicles. Furthermore, with the "G Frame Z," it is possible to expand that opening vertically up to approximately 5.4 meters over two floors. This is the "Large Opening Technology" that broadens the view, enhances comfort, and provides a magnificent sense of openness. 【Features】 ■ Full openings of up to approximately 7.3 meters are possible ■ Unique and robust frame structure using heavy timber ■ "G Frame Z" achieves full openings up to the second floor *For more details, please contact us or download the catalog.

"Rodman" is a new original tie-down system that replaces traditional hold-down hardware to prevent the overturning of shear walls, responding to the high-strength requirements of shear walls in mid-rise buildings. In wooden mid-rise buildings, enormous uplift forces can occur on shear walls, which may exceed the capacity of existing hold-down hardware. This system was developed to address such significant uplift forces. 【Features】 - By transmitting the uplift forces of each floor directly to the foundation through tie rods, the hardware for each floor can be miniaturized. - The use of high-strength rods allows for a reduction in rod diameter, thereby decreasing the weight and volume of the hardware. - The system can accommodate up to 10mm of movement in response to building shrinkage. *For more details, please contact us.*

The "Steel Frame-less Elevator Shaft" is an elevator shaft that eliminates the need for a steel frame and can be installed on wooden structures using special hardware. In response to demand, a high-capacity elevator has been introduced. It supports large-scale transportation in various settings. (6 people 45kg to 15 people 1000kg) 【Features】 ■ Allows for elevator installation using a fastening method without constructing a steel frame in wooden lift shafts ■ Reduces the space required for the lift shaft and lowers the cost of steel construction ■ Compatible with two-by-four construction methods. Installation methods are currently under patent application *For more details, please contact us.

Due to many advantages, there is a growing trend in wooden structures of four stories or more. Generally, reinforced concrete (RC) or steel (S) structures are commonly planned, but the high cost performance of the "two-by-four construction method" is gaining attention. This method simplifies the work process by panelizing the floors, walls, and roofs, achieving a reduction in construction time. It is possible to reduce labor costs associated with expenses. Additionally, we propose methods to achieve planning and cost benefits through original technical support such as the "tie-down system" and "wooden elevators." **Advantages of Mid-rise Wooden Construction (4 Stories or More)** - Cost reduction is possible due to differences in foundation design and ground response capabilities. - Simplifying the work process leads to a reduction in construction time. - It is possible to reduce labor costs associated with expenses. - It is feasible to realize plans typically designed for RC or S structures. - It is easier to secure effective space. *For more details, please refer to the PDF document or feel free to contact us.*

The wooden warehouse, which retains its appearance from the time of framing, showcases the beauty of wood with its neatly arranged columns and trusses, receiving high praise. The gypsum board, required by fire prevention and firefighting regulations, serves as a structural component of the two-by-four construction method. Since 2010, we have been working on large-scale wooden structures, and our achievements in warehouses and factories have spread nationwide. We have consolidated this know-how into the Wood Big Span Method™. 【Examples of Projects】 ■ Type S: Exposed Wooden Structure - Expansion of our two-by-four panel factory * Purpose: Warehouse * Walls finished with board, ceiling exposed wood ■ Type I: Wall Board Cladding The largest wooden feed warehouse in Japan (at the time) constructed for earthquake recovery * Purpose: Warehouse * Walls finished with board, ceiling exposed wood ■ Type T: Semi-Fire-Resistant Building - Wooden Panel Factory * Purpose: Factory * Walls and ceiling finished with board * Region: Area under Article 22 of the Building Standards Act, at risk of fire spread * For more details, please refer to the PDF materials or feel free to contact us. * We are also accepting visits.

The wooden warehouse "Smart Warehouse" uses environmentally friendly timber as structural material and employs a lightweight and deformation-resistant "Connect Truss," making it possible to achieve a large space with sufficient strength and durability using minimal columns and walls. Additionally, by adopting a high-strength brace wall using a uniquely developed turnbuckle brace, it minimizes the walls supporting the large space's framework, allowing for free access necessary for the warehouse. It is a sturdy wooden warehouse that meets seismic grade 3 standards while being lightweight and cost-effective. 【Features】 ■ Overwhelming cost performance ■ Low price starting from 150,000 yen per tsubo ■ Construction period of 3 weeks achieved (for 2 units of 600 square meters, 20m x 30m) ■ The beauty of wooden trusses arranged in an orderly manner ■ Timber trusses significantly reduce environmental impact * For more details, please refer to the PDF materials or feel free to contact us. * Tours are also available.

The "Wood Big Span Method," which uses high-durability and high-strength wooden trusses, allows for the construction of warehouses with large spans and high ceilings even in wooden structures. According to the 2019 Construction Start Statistics Survey Report, when comparing the construction unit prices of various structures, it is evident that wooden warehouses are more than 10% cheaper than steel-framed warehouses. Additionally, while the useful life of depreciable assets is set shorter compared to other structures, it does not necessarily mean that the lifespan of wooden buildings is shorter than that of other structures. The "useful life for depreciation" is merely a guideline; for warehouses, the depreciation period for steel structures (with steel thickness over 4mm) is 31 years, while wooden structures can be depreciated in less than half that time, at 15 years. 【Features】 ■ Can be used as a commercial warehouse ■ Achieves a 4m eave necessary for loading and unloading, and a ceiling height of 7m ■ May be eligible for subsidies *You can view case materials from the "PDF Download." Please feel free to contact us with any inquiries.

The wooden structure insulated composite panel "Double Shield Panel (DSP)" is a structural insulated panel that sandwiches expanded polystyrene (EPS) as the core material between structural face materials made from laminated hardwood chips (OSB). It boasts excellent structural strength and is available in sizes up to 1,820×6,000mm, making it widely used in large-scale construction. Its wood usage rate is about half that of conventional wooden structures, contributing to the protection of forest resources. 【Features】 ○ Short construction period: Simplified processes make it easy to install ○ High strength: No intermediate support needed for spans over 5m ○ Large spaces: Easy to handle regardless of construction method ○ High insulation and fire resistance: Insulated at the roof rather than the ceiling / Certified for quasi-fire resistance according to regulations ○ Environmental consideration: Obtained F☆☆☆☆ rating For more details, please contact us or download the catalog.

Do you have any concerns like this? "I want to incorporate wood, but isn't it difficult for large-scale buildings?" You can design the roof using wood alone! Mixed structure options are also available. How about considering the roof structure of the building with "wood," taking into account people and the environment? We will propose a suitable roof structure according to your plans. 【Features】 - Mixed structure compatible. Excellent combinations with RC and S structures. - Capable of large spaces and long spans. - Use of domestic materials. - Lightweight structural framework. - Contribution to SDGs. 【Lineup】 - Double Shield Panel (DSP) - Wooden Truss - Two-by-four method wooden roof - NLT (Nail-Laminated Timber) *We are currently offering a free collection of architectural case studies! Please download the PDF to obtain it. Feel free to consult us for detailed specifications and more information.

We would like to introduce the "M-HR method," a combination of the wooden two-directional frame structure "Summit HR method" and the "Two-by-Four method," which is a combination that has not existed until now. 【Are you giving up on planning like this?】 ◆ You want to create a large open space on the first floor with wooden construction, but you want to keep overall costs down. (Catalog name: M-HR method) ◆ You want to differentiate between wooden frame structures and wall structures in a planar layout. (Catalog name: G frame) By using the Summit HR method to create a large open space on the first floor and employing the "Two-by-Four method" for the second and third floors, we can achieve a balanced architectural proposal in terms of cost! For example, the first floor can be effectively used for stores such as restaurants or parking, while the second and third floors can be proposed for rental offices or multi-family housing. *For more details, please download the PDF. Feel free to contact us for more information.

At Kumamoto Aso Airport's passenger terminal building, we have adopted a wooden truss called "Connect Truss," made from cedar sourced from Kumamoto Prefecture, and a wooden composite insulation panel known as "Double Shield Panel (DSP)" for the roof section. It can also accommodate mixed structures◎ A large space can be realized with wood! How about considering the roof structure of a building with "wood," taking into account people and the environment? 【Advantages of Wooden Roofs】 ◆ Does not limit the choice of lower structures ◆ Utilization of domestic materials ◆ Lightweight framework ◆ Contribution to SDGs *We are currently offering a free collection of architectural examples! Please download the PDF to obtain it. Feel free to consult us for detailed specifications and other inquiries.

The wooden structure insulated composite panel "Double Shield Panel (DSP)" is a structural insulated panel that sandwiches expanded polystyrene (EPS) as the core material between structural surface materials made from laminated hardwood chips (OSB). It is widely used in large-scale buildings and achieves large spaces by providing insulation through the roof. 【Features】 ○ Short construction period: Simplified processes make it easy to construct ○ High strength: No intermediate support needed for spans over 5m ○ Large spaces: Easy to handle regardless of construction method ○ High insulation and fire resistance: Insulation is provided through the roof, not the ceiling / Certified for quasi-fire resistance ○ Environmental consideration: Acquired F☆☆☆☆ certification *We are currently offering a free collection of architectural examples! Please download the PDF to obtain it. For detailed specifications, feel free to consult us.

"I want to incorporate wood, but it might be difficult for large-scale buildings..." We can help with that concern. How about considering a wooden structure for just the "roof" to start with? We can also accommodate combinations with other construction methods! We propose a roof structure that utilizes the resource "wood," which is considerate of people and the environment, and achieves local production for local consumption. 【Features】 - Compatible with mixed structures. Can be combined with RC and S structures. - Capable of accommodating large spaces and long spans. - Can utilize domestic and locally sourced materials. - Lightweight structural framework. - Contribution to SDGs. We will propose a suitable roof structure tailored to your plans. Please feel free to consult us for detailed specifications. *We are currently offering a free collection of architectural examples! For more details, please download the PDF and take a look.

At Huis Ten Bosch's "Weird Hotel," wood composite insulation panels called "Double Shield Panels (DSP)" have been adopted for the roof section. The sandwich structure, which sandwiches insulation material without gaps, creates a stable insulation layer. It is also compatible with mixed structures! It can be used not only with wooden structures but also in combination with reinforced concrete (RC) and steel (S) structures. How about considering the roof structure of a building with "wood" that takes into account both people and the environment? 【Benefits of DSP】 ◆ Does not choose the lower structure ◆ Allows for comfortable and effective use of attic space ◆ Energy-saving effects last long and contribute to SDGs *We are currently offering a free collection of architectural examples! Please download the PDF to obtain it. Feel free to consult us for details on specifications.

At the Drugstore Seki Shinmachi Store (in Ome City, Tokyo), a large-span wooden structure utilizing nail plate trusses has been adopted for the roof section. This wooden roadside store achieves a spacious area of 33.6m x 36.6m. A must-see for those who think such a space can only be achieved with steel structures! By utilizing wooden trusses, large-span architecture can be realized. How about considering the building's structure with "wood," taking into account both people and the environment? It is also compatible with mixed structures◎ Nail plate trusses can be used not only with wooden structures but also in combination with reinforced concrete (RC) and steel (S) structures. *We are currently offering a free collection of architectural examples! Please download the PDF to obtain it. Feel free to consult us for details on specifications and more.

From residential buildings to large-span facilities and livestock barns, we can accommodate a wide range of applications. Large spans can be achieved even with thin materials without using large cross-section materials. Materials that can be used for nail plate trusses were originally limited to "lumber for framed wall construction," but the scope of application has expanded to include lumber for traditional construction (cedar) as well. This allows for materials to be sourced locally, making production and procurement easier. By utilizing locally sourced timber in trusses, local production and consumption can be promoted in each region.

Do you have any of these concerns? "I want to build with wood, but I don't know where to start." "I'm stuck with structural design." We can solve your problems. Our Wood Materials Business Division provides comprehensive support for wooden construction from planning and design to construction. We offer optimal solutions for your concerns. Strengths of the Wood Materials Business Division: 1. Achieving large-scale and spacious wooden structures with high-performance wood technology. By utilizing advanced technologies such as "Double Shield Panel (DSP)" and "Connect Truss," we enable the construction of large-scale and spacious wooden buildings with an open feel. 2. Diverse construction methods to meet various needs. We can accommodate various construction methods and structures, including wooden frame construction, two-by-four construction, wooden frame structures, and hybrid structures with RC and S construction. This allows us to respond to diverse architectural design needs. 3. Sustainable manufacturing rooted in the community. We have production facilities across Japan and actively promote the use of local materials. This contributes to the realization of a sustainable society that considers the environment.