SafeSet Technology for Mechanical Anchors

Why does installation torque matter?

Improper installation torque can affect the performance of mechanical anchors

Traditional installation method

Installers may not consistently install mechanical anchors

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

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 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 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?

Introducing Hilti SafeSet™ Technology for mechanical anchors

SafeSet™ Technology

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

The anchor setting trifecta: SafeSet

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.

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

OSHA Silica Dust Standards

Resources to help professionals just like you in the construction industry better understand and comply with the new OSHA 1926.1153 regulations for silica dust exposure.

See resources

Kwik Bolt TZ Anchors

Wedge anchors for cracked concrete and seismic conditions.

Learn more about Kwik Bolt TZ anchors

Resources for Specifying Hilti SafeSet™

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

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

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

Learn more

Specifications, General Notes and CAD Details

Incorporate Hilti anchor products into your designs.

Learn more

Ask Hilti

Our online community offers expert advice from top engineering professionals.

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