No need for pilot holes due to special processing. Structural screws that are effective in medium to large wooden buildings and seismic renovations.
We cannot accommodate the needs of medium to large-scale wooden construction with the nails and screws we always use! Here we introduce the "DH Wood Long Screw" that can meet such demands. Feature 1: "Structural screws" that can join structural materials. These structural screws are utilized in various situations of large-scale wooden buildings, starting with the CLT method. They can be used instead of hardware for efficient construction. Additionally, the tip is specially processed, eliminating the need for pilot holes during installation! Truly efficient in construction and cost! Feature 2: Long half-thread screws! Available in lengths from 90mm to 320mm! They can secure thick wood materials like laminated timber. Examples of use include "stopping rafters," "reinforcing overlapping beams," "aligning columns," and "joining inclined frame beams." Feature 3: Shear and tensile tests have been conducted on the screws. After reviewing the test data, please consider various other applications beyond those mentioned above. *For more details, please contact us or refer to the related links or catalog.
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basic information
Specifications and Dimensions (mm) ■Type Half-thread (Flat head specification) ■Nominal Diameter × Length Nominal Diameter 8 Length 90–320 ■Screw Length ・90mm–110mm: 52 ・140mm–320mm: 80 ■Quantity ・90mm–170mm: 100 pieces ・200mm–320mm: 50 pieces *We can also accommodate nominal diameters up to 12mm and lengths up to 1500mm through made-to-order production. Please contact us separately as discussions regarding manufacturing volume and delivery time will be necessary. *For more details, please contact us or refer to the catalog.
Price information
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Delivery Time
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Applications/Examples of results
You can use the CLT construction method for the construction of buildings with medium to large cross-sectional dimensions.
Detailed information
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Dimension drawing The shape differs between fully threaded and half threaded. Please use according to your application.
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Post alignment Wood long screws for post alignment joint.
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Laminated reinforcement of horizontal members with wood long screws.
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Rafter stop Wood long screws for rafter stop.
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Inclined axis assembly beam joint Wood long screws for joining inclined beams.
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Company information
Our company is engaged in the planning, design, and development of fastening products such as screws, nails, and bolts, as well as structural hardware used in wooden houses and solar mounting systems for solar power generation. We will continue to challenge ourselves to innovate while responding to our customers' needs in line with the changing times.