Wire rope assembly
On tied arch bridges, vertical or crossed hanger assemblies are excellent at transferring loads from the bridge to the arch. Sealed rope or helical strand assemblies come with a wide range of end treatment options to choose from to suit your design needs. In addition, when it comes to corrosion protection, Bridon-Bekaert offers a variety of solutions to meet your service life and maintenance requirements. The specific setup of short cable lengths is inherent to the tie-rod concept and we look forward to working with you to help you realize your plan.
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Wood drying directly affects the life of wooden doors
The traditional wood drying process involves gradually introducing heat from the surface into the core of the wood. In contrast, microwave drying directly affects the entire piece of wood. The moisture within the wood and the wood itself absorb microwave energy, causing internal heating. As surface moisture evaporates more quickly, the internal temperature tends to be higher than the surface, creating a pressure difference that accelerates the movement of moisture toward the surface.
Microwave drying uses wood as a dielectric material. Under the influence of an electromagnetic field, water molecules in the wood become polarized. The continuous alternating electromagnetic field causes these molecules to move rapidly, generating friction and heat, which raises the overall temperature of the wood. This method is highly efficient, allowing for faster drying compared to conventional methods like convection, steam, or infrared drying. However, different types of wood require specific microwave temperatures—too high can cause internal cracking, while too low may slow down the drying process. When the internal temperature exceeds 100°C, the increased vapor pressure further speeds up moisture movement, making microwave drying significantly faster.
In modern homes, solid wood staircases are a popular choice, especially in high-end interiors. Many consumers focus only on the style and price when purchasing wooden stairs, often overlooking important details such as the wood’s moisture content and drying process. Proper drying is crucial to prevent warping, cracking, and to improve the wood’s durability and yield.
Unfortunately, some consumers find that their solid wood flooring cracks within a year of installation, even if they take care of it. This issue isn’t unique to flooring—it can also affect solid wood furniture, doors, windows, and stairs. The root cause is often inadequate drying during the manufacturing process.
Most medium to large manufacturers dry wood before producing solid wood products, following strict procedures. However, not all companies adhere to these standards. Some small workshops use makeshift “earth kilns†(burnt pits) to dry wood, which is cheaper but less effective. These methods result in uneven drying, with some parts over-dried and others still moist, leading to long-term structural issues.
Another common approach is a two-step drying process: first, steam drying to remove moisture and reduce internal stress, followed by microwave drying to ensure thorough and even drying. Steam drying typically takes 30–40 days and is done from the outside in, similar to how a sweet potato might be cooked—outer layers are soft, while the center remains raw. Afterward, the wood is stored for 3–4 months to acclimate to environmental conditions, a step many small manufacturers skip due to time and cost constraints. Finally, microwave drying is applied to complete the process, ensuring the wood is fully dried without cracking or warping. This second drying stage increases costs significantly, but it’s essential for quality.
German microwave drying systems are expensive, making them inaccessible to small manufacturers. As a result, small workshops have shorter production cycles and lower prices. However, this often comes at the expense of quality. When choosing wood products for your home, it's wise to go with reputable brands that invest in proper drying techniques and have strong quality control. A poorly made staircase not only affects the aesthetics of your space but could also pose safety risks. Always prioritize quality over cost when it comes to wood products.