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question.postedBy Laken Weeksabout 6 years ago

profis,ANCHORS,Limit State Design,strength design

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The design of anchors is based on an assessment of the loading conditions and anchorage capacity. Strength design (SD) and limit state design (LSD)methods are currently in use in North America for the design of anchors.

Strength Design: The Strength Design Method for anchor design has been incorporated into several codes such as IBC and ACI 318. The method assigns specific strength reduction factors to each of several possible failure modes, provides predictions for the strength associated with each failure mode, and compares the controlling strength with factored loads. The Strength Design Method is a more accurate estimate of anchor resistance as compared to the ASD approach. The Strength Design Method, as incorporated in ACI 318-14 Chapter 17. Strength Design is state-of-the-art and Hilti recommends its use where applicable.

Limit State Design: The Limit State Design Method for anchor design is described and included in the CSA A23.3 Annex D. In principle, the method follows the strength design concept with the application of different strength reduction factors. The Limit States Design Method generally results in a more accurate estimate of anchor resistance as compared to the ASD approach.

For a detailed breakdown of these designs methods, including design examples, please see the Hilti Product Technical Guide Volume 2: Anchor Fastening.

Hilti has decided to embrace the state of the art SD and LSD methods for designing post-installed anchors. To assist you in designing with these methods Hilti offers best in class design software, PROFIS Engineering. Hilti PROFIS Engineering is comprehensive design software for anchor design in concrete, masonry, and concrete-over-metal-deck base materials and includes a versatile load engine and various options for base plate analysis. PROFIS Engineering includes the Anchoring to Concrete provisions of the ACI 318 Building Code and the ACI 349 Nuclear Code and the Anchorage provisions of CSA A23.3 Annex D.

Included within PROFIS Engineering software are a number of powerful features, exclusive to Hilti, that greatly enhance the user's choice and efficiency. Users can design with Hilti mechanical and adhesive anchor systems as well as cast-in-place headed studs and headed bolts. Tutorials explain how to navigate within PROFIS Engineering. The PROFIS Engineering Design Guide is an innovative, interactive tool that explains ACI 318 Chapter 17 strength design calculations and PROFIS Engineering design assumptions.

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