Tension Control Bolt Guide

Tension Control Bolts (TC Bolts) are high-strength fasteners designed for structural applications. They are large bolts featuring a unique design that creates precise tensioning with exceptional consistency. TC bolts are commonly used in steel structures in construction applications. This guide provides an overview of the benefits and applications of tension control bolts, along with step-by-step instructions for the TC bolts installation process.

What Tools and Components Are Needed for TC Bolts Installation?

• Tension Control Bolt
• A563 Heavy Hex Nut: Paired with the TC Bolt
• F436 Structural Washer: Distributes the load and prevents damage to the surface
• Shear Wrench: A specialized tool designed to grip the spline and apply the necessary torque until it shears off

Note: Fastco supplies all of these components and tools for easy ordering

Tension Control Installation: Step-by-Step Guide for Installing TC Bolts

The instructions below provide an overview of tension control bolt installation. While the TC bolt installation process is simple, always adhere to any manuals or instructions from the manufacturer of the specific fastener you use for your application.

Installation steps for tension control bolts include:

• Step 1: Insert the TC Bolt through the aligned holes of the steel structure you are fastening. Be sure to properly place the F436 washer and A563 heavy hex nut onto the bolts.
• Step 2: Use the shear wrench to snug the TC bolt. You should hear a change in the shear wrench's tone as the material snugs. At this point, the spline is still intact.
• Step 3: When all mating surfaces are in contact, tighten the TC bolt with the shear wrench until the spline shears off.
• Step 4: Visually confirm that the spline has been properly removed.

What Industrial Applications Use Tension Control Bolts?

TC Bolts are primarily used for structural applications. Their design enhances safety, reduces maintenance, and meets compliance with engineering standards. Common scenarios where TC bolts are used include:

• Bridges and Infrastructure
• High-Rise Buildings
• Industrial Facilities

What Are the Key Benefits of Tension Control Bolts?

• Predetermined torque, creating uniform tension across every bolt
• Reduces the risk of over- or under-tightening
• Can be installed by a single worker
• More efficient installation process compared to standard bolts
• Extremely durable and reliable

Frequently Asked Questions

How does a tension control bolt work?

A tension control bolt features a spline at the end of its shank. During installation, a shear wrench grips this spline and tightens the bolt. Once the desired tension is achieved, the spline shears off, resulting in perfect tension levels.

How to tighten tension control bolts?

To tighten a TC Bolt, insert it through the aligned holes of the materials being joined. Place the washer and nut, then use a shear wrench to apply torque. The wrench grips the spline and rotates until it shears off.

When to use tension control bolts?

TC Bolts are used in construction and structural applications like bridges, high-rise buildings, and industrial structures.

Are TC bolts pretensioned?

Yes, TC Bolts are designed to be pretensioned.

What is the difference between TC bolts and SC bolts?

SC Bolts (Slip-Critical Bolts) refer to bolts used in slip-critical connections. Bolts used in SC connections require the clamping force to prevent slippage between connected surfaces. While TC Bolts can be used in slip-critical applications, the term "SC Bolt" pertains to the application rather than the bolt type.

Are Tension Control Bolts slip critical?

TC Bolts can be used in slip-critical connections, provided they are installed correctly to achieve the necessary clamping force.

Order Tension Control Bolts in Bulk at Wholesale Prices Today

If you're looking for a tension control bolt supplier or other structural bolts, Fastco has you covered. View our inventory of TC bolts, or request a quote online to get started on your order. Questions? Contact us, and our team will gladly assist you in finding the best fastening products for your application.