TW Bolt Testing Terms Explained

An Explanation of TW Bolt Testing Terms

The unique and innovative design of the TW Bolt means that certain specific criteria need to be met in order for it to be applied successfully.

Using these criteria means being aware of the way in which the dimensions of each bolt are measured, and these details are set out below.

The image above also offers a pictorial representation of each term.

If you still have any questions, please get in touch with us using the contact details at the bottom of the page or by sending us an email by clicking here.

Minimum Fixing Thickness

The minimum fixing thickness is the figure applied to the minimum distance which each bolt is able to fix.

The overall thickness of the materials being clamped is the figure used to make this calculation.

Maximum Fixing Thickness

The maximum fixing thickness is the figure applied to the maximum distance that each bolt is able to clamp.

The overall thickness of the materials being clamped is the figure used to make this calculation.

It should be noted, however, that the maximum fixing thickness of a standard bolt can be extended to a large degree through the use of extension sleeves.

Please contact us for more specific information on this point.

Tensile Strength

The tensile strength of a TW Bolt is the pull-out force needed for the bolt to fail when a tensile load is acting upon it.

Depth Clearance

The depth clearance refers to the minimum space required within a cavity wall for the legs on the TW Bolt to deploy effectively.

The measurement has to be noted with great care when fixing into Steel Hollow Sections in order to make sure that the bolt doesn’t reach as far as the opposite section wall before being correctly installed.

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