High-Quality Brace Manufacturer
Core Classifications and Common Specifications
Main Types: Tie rods are divided into straight tie rods and diagonal tie rods. Straight tie rods are mostly made of φ12 round steel, and there are two common processes: one is to process 11.8mm diameter round steel with reduced diameter at both ends and then threaded; the other is to directly process 10.6mm diameter round steel. They are mainly used for horizontal connections between adjacent purlins. Diagonal tie rods are often used in conjunction with struts to form a geometrically invariant system, focusing on strengthening the stability of the purlins along their weak axis. They are often installed at bends or special locations such as ridges and roof openings.
Mainstream Specifications: Round steel with a diameter of 8-16mm is commonly used, with φ12 and φ14 being the most common specifications. The abbreviation "T" on the drawings indicates that some rigid tie rods will use a combination of "φ12 + φ322.5", meaning the core tie rod diameter is φ12, and the outer casing is a φ322.5 round steel tube. For special applications, even larger tie rods are available, with diameters up to φ300 and single lengths up to 12m. Q235 wire is commonly used to meet the load-bearing requirements of conventional steel structures.
Key Processing and Corrosion Protection Technologies
Basic Processing: Core processes include cold drawing, diameter reduction, and thread rolling, allowing for installation without welding. For example, straight tie rods are threaded at both ends, and with a nut, a secure connection to the purlin is achieved. This is convenient and allows for flexible adjustment of tightness to meet the installation precision requirements of the purlin.
Corrosion Protection: Common methods include hot-dip galvanizing and electro-galvanizing. Some high-end applications employ a composite process of zinc or aluminum spraying followed by a sealing coating with anti-corrosion paint. This composite coating offers a significantly longer protective lifespan than a single coating, effectively resisting outdoor dampness, rain, snow, and other corrosive environments, thus extending the service life of tie rods in open-air steel structure buildings.
Installation Points and Application Scenarios
Installation Specifications: The layout must be adjusted according to the column spacing. For column spacing within 6 meters, one tie rod is typically installed; for spacing greater than 6 meters, 2-3 tie rods are required. Rigid tie rods should be added at bends. At ridges, roof openings, etc., diagonal tie rods and struts must be used in conjunction to transfer tension to the rigid frame, preventing overloading of individual purlins. The tie rods only transfer tension and must work in conjunction with the struts that bear compressive stress to distribute the lateral force of the purlins to the beams or columns.
Typical Scenarios: Primarily used in the roof and wall systems of large factories, warehouses, stadiums, and other steel structure buildings, responsible for fixing C-shaped and Z-shaped purlins. For example, in portal steel structure workshops, straight tie rods are used to connect the entire row of roof purlins into a whole, and then diagonal tie rods are used to reinforce and fix them at the ridge to resist the displacement or deformation of purlins caused by external forces such as wind loads; it can also be used in derivative scenarios such as photovoltaic brackets to help fix the bracket structure and ensure overall stability.
