How to test Wall Tie Strength Using Thor Helical’s Load Test Meter

When it comes to keeping a building safe and sturdy, the hidden heroes are often the ones you never see — wall ties. These small metal fixings play a big role in holding the inner and outer parts of a cavity wall together. But like all things, they can wear down, rust, or be poorly installed. That’s where Thor Helical’s wall tie strength Test Meter comes in.

Let’s break down what this tool does, why it matters, and how it’s used.

Wall ties act like metal bridges inside your wall. They connect the two layers of a cavity wall (usually the brick outer wall and the block inner wall) so that they work as one strong structure. Over time, if these ties fail or are missing altogether, it can lead to cracks, bulging walls, or even collapse in extreme cases.

Testing these wall ties, especially in older buildings or ones undergoing renovation, is essential to ensure they’re still doing their job.

The Thor Helical Wall Tie Load Test Meter is a device designed to test how firmly a wall tie is anchored into the wall. Think of it like a tug-of-war machine: it gently pulls on the tie and shows on a dial how much force it takes to budge it.

The goal is simple — check if the tie is strong enough or if it’s time to fix or replace it.

• A Load Test Meter with a built-in gauge: This shows how much force is applied (up to about 800 pounds-force, or 3.6 kilonewtons).
• A special key: This grips the tie securely.
• A mechanism for pulling the tie: Operated manually using a nut and bar system.
• A bridge frame: It spreads the force evenly across the wall so you’re testing the tie, not damaging the wall.

Optional: A Deflection Gauge (Dial Test Indicator) can be added to precisely measure how much the tie moves under pressure.

For testing a tie already installed in the front layer of the wall (the one closest to you), drill and install the tie so about 90 mm sticks out. If you’re testing a tie in the far layer (behind the front wall), drill through the first layer and install the tie deeper in.

Slide the test key onto the tie and secure it. This key lets the device pull the tie without slipping.

Place the Load Test Meter over the tie and lock the key in place so it doesn’t spin.

Turn the nut slowly to apply a small force, about 50 pounds (just enough to settle the tie into place).

Use the Tommy Bar to apply more pressure. Watch the gauge carefully. Keep going until you reach the required force for your tie size — or until the tie starts to move or pull out.

If you’re using the dial gauge, you’ll see exactly how far the tie shifts as the force increases. Minimal movement means a strong, well-anchored tie.

Slowly loosen the nut to release the tension, then remove the test key.

Every size of wall tie has a recommended load it should withstand:

• 5 mm diameter ties should hold up to about 2.0 kN (that’s roughly 450 lbf).
• 6 mm ties should handle up to 2.5 kN (about 560 lbf).

If the test shows the tie can’t handle this, it might be a sign of:

• Poor installation
• Weak wall material
• The need for a longer or stronger tie

• Peace of Mind: Know your wall is safe and secure.
• Catch Problems Early: Spot weak or faulty ties before they become major issues.
• Save Money: Avoid expensive repairs by identifying issues early.
• Stay Compliant: Many building regulations require these tests, especially during retrofitting or restoration work.

Thor Helical’s Wall Tie Load Test Meter is like a health check for your wall ties. It’s easy to use, gives clear results, and helps ensure the structural safety of buildings old and new. Whether you’re a builder, surveyor, or a homeowner tackling renovations, this tool gives you confidence that your walls are built to last.