堤木材 List of Products and Services

Have you ever been forced to change your design because it couldn't be processed with pre-cutting? We can combine standard processing, which machines excel at, with special joints and connections that require human hands. We can smoothly achieve high-difficulty wooden structures, such as decorative beams and diagonal materials. By supporting from structural calculations, we can balance aesthetics and safety. We will bring your architectural vision to life with reliable technology. Please bring your drawings and consult with us.

• Structural Materials

Due to the soaring prices of steel frames and delays in delivery, more companies are switching their warehouses and stores to "wooden" structures. However, structural calculations that differ from residential buildings and the procurement of large components pose challenges. Tsutsumi Lumber reliably delivers long materials and custom large cross-section laminated timber to the site through its unique channels. We welcome consultations at the stage of "unsure whether to choose steel or wood." Even unfamiliar non-residential projects will be backed by structural professionals.

• Structural Materials

Have you ever experienced being told "we can't do this processing" when you requested a precut factory according to the structural design office's drawings, or encountered poor fit on-site? The time spent on adjustments between contractors and checking the consistency of the drawings is a significant burden for construction companies. Tsutsumi Lumber handles everything from design, procurement of timber, precut processing, to on-site delivery all in one company. By creating structural drawings based on the premise that "processing can be done," we eliminate troubles and rework in later stages. You can consistently entrust us with special processing and large cross-sections, from timber procurement to processing. We eliminate the cumbersome adjustment tasks between contractors, creating an environment where you can focus on your core business.

• Structural Materials

The enforcement of the Public Building Wood Utilization Promotion Act (Wood Promotion Act) strongly encourages the use of local timber in public facilities such as community centers, schools, and government offices. However, there are many voices expressing that "it is difficult to stably procure the necessary quality and quantity of local timber in accordance with construction schedules." Our company has built strong relationships with the local log market in Fukuoka Prefecture over many years. This "log procurement capability" is the source that enables the stable supply of local timber. We provide consistent support from origin certification to high-quality sawing, drying, and processing in accordance with JAS standards. We offer a comprehensive proposal of "Fukuoka Prefecture timber" for all the wood needed for construction, from structural materials to interior materials. For designers and clients who want to use local timber but do not want to face procurement setbacks, we respond to their needs as professionals in wood procurement.

• Structural Materials

I want to use square beams with a height of over 300mm in a large-span hall, but I gave up on adoption due to unstable procurement. I am also worried about whether the long materials specified in the drawings can be reliably obtained since the wood shock. Do you have such concerns? Our company resolves this 'procurement anxiety' by consistently handling everything from direct purchasing in the log market to sawing, drying, and processing. Our strengths lie in our unique procurement network and our own JAS-certified factory. This allows us to supply non-standard structural materials, such as square beams over 300mm in height and long materials, in a planned and stable manner, even if they are generally difficult to distribute. In particular, in spatial designs that require large spans, such as common areas in medium-sized wooden buildings like community centers, our 'procurement capability' and 'processing technology' are utilized. We deliver JAS-certified structural materials with guaranteed quality, in the necessary quantities, at the right time.

• Structural Materials

In architecture where high quality and safety are required, such as community centers and medical welfare facilities, are you separating the orders for "wood procurement," "pre-cutting," and "special processing"? This not only complicates management but also carries risks of quality variation and delays in construction. Our greatest strength lies in our "integrated production system," which consistently manages everything from raw material procurement, lumber processing, high-frequency drying, JAS product pre-cutting, special processing, to delivery. By consolidating points of contact, we significantly reduce the burden on designers and construction management personnel. We can make responsible proposals regarding quality, delivery time, and cost. We have particularly rich experience with medium-sized wooden buildings such as community centers. By entrusting us with all processes related to wood in a one-stop manner, we accurately reflect the design intent and deliver stable quality wood on schedule.

• Structural Materials

Many residential complaints are due to quality issues related to drying. Wood exhibits excellent performance as a building material only when it undergoes proper drying. **Five Detriments of Poor Drying Quality** 1. **Dimensional Stability** Insufficiently dried wood can warp or bend during use, leading to splits and gaps. 2. **Strength Performance** Drying improves strength performance, such as bending strength. However, recent studies have reported a decrease in bending strength for wood dried at high temperatures for extended periods. Additionally, inadequately dried wood can lead to issues such as loose joints. 3. **Cracking** Wood can experience two types of cracking: surface cracking and internal cracking. - **Surface Cracking**: V-shaped cracks that appear early in the drying process. They have little impact on strength performance. - **Internal Cracking**: Cracks that occur within the wood later in the drying process. These are particularly pronounced when heartwood is dried at high temperatures for long periods. 4. **Discoloration** Artificial drying can darken the color of the wood, especially when dried at high temperatures for extended periods. 5. **Termite Resistance and Decay Resistance** Drying enhances termite resistance and decay resistance. However, recent research has shown that wood dried at high temperatures for long periods may experience a decline in both termite resistance and decay resistance.

• Structural Materials

**"The Invisible Parts are the Most Important Structural Materials"** The quality of structural materials is essential for the long and safe use of buildings. Because these parts are not easily visible after completion, whether the wood is stable with minimal cracking and warping significantly affects the overall lifespan of the building. **"The Secret to Minimal Cracking and Warping is 'High-Frequency Drying'"** At Tsutsumi Wood, we have introduced a unique composite drying technology that combines high-frequency equipment with high-temperature steam dryers. ◾️ **Key Points** - Drying the wood thoroughly without unevenness - Reducing variations in moisture content - Suppressing cracking, warping, and discoloration By focusing on these points, this drying technology allows us to maintain strength while also preserving aesthetic beauty. **"Strengths of Tsutsumi Wood's Timber"** While implementing such innovations, we supply higher quality timber. - Reliable quality assurance as a JAS-certified factory for structural lumber - A consistent supply system from raw logs to precutting - Contributing to the optimization of quality, cost, and construction period.

• Structural Materials

A single piece that truly serves as the core of design, influencing the overall aesthetics and strength of the building. We want to respond to the passion of designers by working "together" with them. We also accept requests starting from important single units. We will think together about how to realize this from the perspective and technology of a sawmill that faces raw timber and turn it into shape. We have handled many medium-sized buildings in the community, such as nursery schools and public halls. To stably supply wood for an entire facility with consistent quality, solid technical skills and supply capabilities as a sawmill are essential. From precise responses focusing on a single special material to the supply capacity and trust that allows us to take on an entire building. The breadth of our achievements is our greatest pride. We can meet these two extreme needs because we are a sawmill that consistently handles everything from raw timber procurement to sawing and processing, and we are also a sales company with many years of experience. From inquiries like "I want just this one piece of wood with special dimensions" to requests such as "I want the wood for the entire facility delivered with consistent quality," we will assist in shaping your designs, regardless of scale.

• Structural Materials

Our work involves delivering high-quality timber to you through six processes. 1. Log bidding and procurement 2. Sawmilling and product processing 3. High-frequency and steam composite drying 4. Design, estimation, and application 5. Pre-cut processing 【Three Benefits of Our Integrated Production System】 This system allows us to achieve three major benefits: 1. Reliable quality and trustworthiness By managing everything from raw logs, we ensure consistent quality and provide official quality assurance as JAS-certified products. 2. Guaranteed delivery times and stable supply With our self-contained production system, we achieve stable supply and guaranteed delivery times without disrupting on-site processes. 3. High responsiveness and design flexibility We provide one-stop solutions for challenging large cross-section materials and special processing, expanding design possibilities. Our strength lies not only in the performance of specific machines. It is the synergy created by all processes, from discerning the quality of raw logs to maximizing the characteristics of timber through drying and processing techniques, and our commitment to supporting your designs. We also have service materials available for more detailed information about the quality of dried timber and the characteristics of pre-cut materials. Please take a look.

• Structural Materials

Our company is a sawmill that handles everything from raw log procurement to lumber processing and precutting in-house. We provide wood that has been carefully selected from raw logs and finished with a high-frequency dryer. We can accommodate various orders, including structural materials, small cut materials, boards, processed boards, and laminated wood. With reliable wood from our JAS-certified factory, we support your company's "value-added" creation. Free estimates and consultations are also available. Please feel free to contact us. 【Strengths of the precut wood we provide】 ■ Delivering "high-quality dried wood" ■ Capable of accommodating non-standard requests ■ Safe and secure wood *For more details, please download the PDF or feel free to contact us.

• wood
• Wood processing

At Tsutsumi Lumber Co., Ltd., we primarily process domestic cedar and cypress, with lengths ranging from 2m to 10m and diameters up to 60cm in-house. In 2018, we introduced a pre-cut line manufactured by Miyagawa Koki Co., Ltd., and officially entered the pre-cut business. We are now able to process structural materials, batten materials (rafters, braces, intermediate posts), and plywood, making it easier to meet your requests. 【Business Overview】 ■ Domestic cedar and cypress lumber processing ■ Pre-cut business ■ Construction industry ■ Firewood stove and wooden products business ■ Solar power generation business *For more details, please download the PDF or feel free to contact us.

• wood
• Wood processing