What is a TC BOLT?
TC Bolts, short for Tension Control Bolts, are high-strength structural bolts designed for ease of installation, high reliability, and secure structural connections. Commonly used in steel construction and infrastructure projects, TC bolts o er advantages over traditional bolting systems, especially in applications where controlled tension and high shear strength are critical. This article covers the essential features of TC bolts, including grades, finishes, applications, and technical details, offering a comprehensive understanding of why TC bolts have become a go-to fastening solution in modern construction.
A TC bolt is a pre-assembled fastener comprising a bolt, nut, and washer. Unlike traditional bolts, which require torque to achieve the correct tension, TC bolts rely on a splined (ribbed) end at the bolt’s tail. During installation, a specialized wrench shears o the splined end once the bolt reaches the proper tension, ensuring a precise and consistent tension across all bolts in a connection.
Key Components
- Bolt with Splined End: Features a specifically designed splined tip that engages with the installation tool, allowing for precise torque application and controlled tensioning. This end shears off at the calibrated torque level, ensuring consistent clamping force across the joint.
- ASTM A563 DH Heavy Hex Nut: Designed to pair with high-strength bolts, the DH nut facilitates the TC bolt’s function as an integrated, pre-tensioned system, meeting structural integrity standards for load-bearing applications.
- ASTM F436 Structural Flat Washer: Hardened steel washer that provides uniform load distribution, minimizing deformation under high-stress conditions and contributing to joint