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SafeSet Technology for Mechanical Anchors

Why does installation torque matter?

Improper installation torque can affect the performance of mechanical anchors

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Traditional installation method

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Installers may not consistently install mechanical anchors

anchor installers

53 professional inspectors surveyed

Majority of inspectors surveyed have over 3 years’ experience

Key Takeaways

  1. 56% of failures are due to lack of installer expertise
  2. 33% of failures are due to under torqueing
  3. 17% of failures are due to over torqueing
  4. 26 inspectors said mechanical anchors fail about 1 out of 50 times

How Installation Torque Can Affect Expansion Anchors

properly torqued anchor

Proper Torque

Following the traditional installation method helps ensure the mechanical anchor is properly set. The manufacturer's listed installation torque expands the anchor wedge properly and provides clamping in the connection.

over torqued anchor

Over Torque

Applying too much torque to the nut will result in the mechanical anchor being over torqued. Over torquing may result in catastrophic damage to the base concrete or the integrity of the anchor itself being compromised.

under torqued anchor

Under Torque

Not reaching the recommended installation torque results in the wedges not being fully expanded and less than optimal clamping. This can result in higher displacement of the fixture.

How does improper installation torque affect performance of mechanical anchors?

proper torque vs under torque and over torque

Introducing Hilti SafeSet™ Technology for mechanical anchors

SafeSet™ Technology

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Hilti SafeSet technology is a proven methodology developed by Hilti concrete construction experts to provide new ways for engineers and contractors to minimize installation errors.

Hilti now offers SafeSet reliability to mechanical with the Adaptive Torque (AT) System. The AT System consists of Hilti SIW 6AT cordless impact tool and the SI-AT module

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The anchor setting trifecta: SafeSet

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Safety. Productivity. Approval. SafeSet is Hilti’s proven methodology for consistently high-quality anchor installation at lightning speed.

The SIW 6AT-A22, along with the SI-AT-A22 module, fulfills all SafeSet criteria because they save time and reduce costs while also removing scope for installation error.
 

SI-AT module
SIW 6AT Cordless Impact Wrench with SI-AT Module

The SI-AT Module is the brains of the AT System that works with the SIW 6AT cordless impact wrench.

Learn more about the SI-AT module
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Kwik Bolt TZ mechanical concrete anchors
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Wedge anchors for cracked concrete and seismic conditions.

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Resources for Specifying Hilti SafeSet™

ICC-ES ESR 1917 for KB-TZ
Approved Installation Method

The AT system has been added to the ICC-ES ESR for both KB-TZ and KB 3 expansion anchors as an approved installation method.

ICC-ES ESR 1917 for KB-TZ
AT system instructions for use
Instructions for Use Download the AT system instructions for use
PROFIS Anchor Design Software
Profis Anchor Design Software

Hilti PROFIS Anchor technology allows designers and specifiers to quickly, easily evaluate Hilti anchor products and systems—and then choose the best solution for any conditions.

Learn more about PROFIS Anchor
AT Documentation Software
AT Documentation Software

Installation Report Software for the SI-AT-A22 Module.

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specifications and cad details
Specifications, General Notes and CAD Details

Incorporate Hilti anchor products into your designs.

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ask Hilti
Ask Hilti

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