For contractors and subcontractors who focus on the mechanical, electrical, and plumbing (MEP) trades, there is an overwhelming need for a more productive and simple-to-install post-installed anchor solution for their jobsites. In addition, as projects prioritize sustainability and optimize their concrete slab thickness, there is common need for a shallow embedment anchor to be compatible with various base material types, such as concrete-over-metal deck, hollow core slabs, and post-tension slabs.   

Hilti offers a complete portfolio of drop-in style anchors, known as our HDI and HDI-P drop-in anchors, for customers who needed a flush, displacement anchor that meet the needs of their project specific requirements. A key benefit to these anchors, along with their shallow embedment capabilities, is their ability to accept a threaded element to support a variety of project applications.

In order to provide you with the highest performing products and offer better solutions for your designs, Hilti has updated and expanded its drop-in anchor portfolio family. Hilti has introduced the HDI-TZ and HDI-P TZ drop-in anchor portfolios to the drop-in anchor family, which provide higher performance for engineers and contractors. Now let’s look at the two different anchor portfolios more in depth:



HDI-TZ

Hilti’s current offering of HDI(+), HDI-L+, HDI-S anchor portfolio now expands and elevates the portfolio introducing the new HDI-TZ anchor which will also provide cracked concrete ICC-ES approvals. For the MEP industry, this can be a great value as it will allow customers to find a post-installed anchoring solution with ICC approvals covering both static and seismic design. Paired with the higher performance, this HDI-TZ anchor will allow for higher performing designs in standard slabs and/or concrete-over-metal deck.

With anchor diameters in 3/8”, 1/2", and 5/8”, the HDI-TZ will allow you to utilize this anchor for the MEP designs with embedment depths of 1-9/16”, 2”, and 3-1/4”, respectively. A new productivity feature of the HDI-TZ anchors is the reduction in setting energy required to properly set the anchors. Hilti’s hand setting tool now allows contractors to reduce the required setting time, while helping to reduce the worry that the anchor is not set properly. The time savings can be multiplied even further by utilizing the two-in-one setting tool allowing the installer to have the drill bit and setting tool on one insert. 

HDI-P TZ

Hilti introduced the HDI-P TZ 3/8” for customers who needed a drop-in anchor that was cracked concrete ICC approval and met the requirements of ICC-ES AC193 (for additional information, please reference the following article: Shallow Anchorage - Ask Hilti USA). This was done by redesigning the anchor body to include an expansion sleeve, which reclassified the anchor to a mini expansion anchor rather than a displacement anchor. In addition to an Evaluation Service Report from the International Code Council Evaluation Service (ICC-ES ESR-4236), the HDI-P TZ has received Factory Mutual (FM) and Universal Laboratory (UL) certifications for sprinkler pipe connections. 

To meet your design needs, Hilti has extended the HDI-P TZ portfolio to include 1/4", 3/8”, and 1/2" diameter anchors with 3/4", 3/4" and 1” embedment depth respectively. Since many HDI-P TZ anchors are used in Post Tension (PT) or Hollow Core concrete slabs, these anchors provide shallow embedment depths to avoid interference with the post-tensioned cables. With a complete HDI-P TZ anchor portfolio offering ICC approval, along with FM approval and UL certification, most of your mechanical, electrical, or plumbing designs with anchor rods 1/4" to 1/2" diameter anchor rods are covered. 

MODEL CODE COMPLIANCE / COMPARISON TO OLD PRODUCT

With the HDI-TZ and HDI-P TZ anchors evaluation under ACI 355.2 and ICC-ES AC193, all reports and technical information will reference load values that are used with the Load and Resistance Factored Design (LRFD) anchoring provisions of ACI 318.19 Chapter 17. Compared to the old portfolio (ex. HDI(+) drop-in anchor), which were evaluated using Allowable Stress Design (ASD) parameters, there is no direct comparison between the new and existing products. In order to utilize ASD in your designs, you can reference Section 4.2 “Allowable Stress Design” of ICC-ES ESR-4236 for information on how to utilize the alpha conversion factor based on your load combinations. 

Hilti’s PROFIS Engineering software includes the newest ICC approval data for the HDI-TZ and HDI-P TZ anchors, to allow for an easier transition to the new design. In conjunction, you would be able to utilize the technical documentation for these anchors located on Hilti Online, which provides the simplified design tables and reduction factors. For more information visit the HDI-TZ and HDI-P TZ product pages on Hilti Online and the PROFIS design software to learn more and utilize the latest MEP anchoring innovations in your next project.

RESOURCES

Visit the HDI-P TZ Drop-in Anchor product page to learn more about Hilti’s ultimate-performance short drop-in for shallow embedments in cracked/uncracked concrete and seismic applications.

Read more about the HDI-P TZ Drop-in in the technical supplement: Hilti Anchors for Attachments to Hollow Core Concrete Panels

Start a design with Hilti’s HDI-P TZ Drop-in anchor using PROFIS Engineering Software Suite