Retrofit Anchors Archives - ConSpec Associates, Inc

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Retrofit Anchors

HeliFix PatchPin- Its Uses and Misconceptions

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The HeliFix PatchPin is based on the HeliFix DryFix technology which has been used for well over 20 years. It is further based on a spiral Stainless Steel twisted element being driven into a smaller hole in a substrate to obtain anchorage. For the purpose of a Wall Tie Pullout values are extremely important. Why the PatchPin works so well for concrete patching pins is that it is Stainless Steel and the twist provides maximum grip to the new patching material, the pin can be bent so Stainless Steel wire can be attached but Pullout not so much. If you look at the diagram you will see that when the PatchPin is installed at “alternate” angles they form an impediment which holds the patch in place as the pins are fixed by the substrate and the patch and cannot move. The only need for Pullout is to hold the PatchPin in for installation and attachment of the wire, after that no pullout is needed, only the geometry to hold it, and the concrete patch, in place. This is the misconception that most engineers have, that the performance of the PatchPin is based on Pullout, which of course, being in concrete always exceeds 400 pounds anyway.

Cintec Cement Based Socked Anchors for Overhead Applications

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Cintec Cement Based Socked Anchors can be any length, any steel size, including tubular, round or square, installed at any angle, including overhead and provide a FIREPROOF anchor, especially important in the case of fire in Cavity Walls. Penetration of Steel beams or columns for attachment of any material, including stone and terracotta of any size or weight, only dependent on the substrates ability to support it.

CINTEC PROVIDES CALCULATIONS TO THE EOR, STRUCTURAL ENGINEER.

Installation of Socked Cement Based Anchors – Nothing Easier

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Socked based cement anchors, whether HeliFix or Cintec, are easier to install than resin anchors with almost no waste compared to resin anchors and are fireproof. Installation shown is using plastics inserts for a battery operated bulk cement gun but can be used with just a regular battery or even air operated gun using no sleeves and just filling the tube itself. For high volume projects or long anchors, a pressure pot can be used to facilitate the larger volumes and for the greatest efficiency a peristaltic, continuous feed pump is ideal.

PORTABLE CEMENT BULK GUN

PRESSURE POT

PERISTALTIC PUMP

Socked Cement Based Anchors vs Resin Anchors

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Considering all the concerns regarding cavity walls and the need for Controlled Inspection bases solely on Resin Based Anchors consider the ease of installation and Fireproof property of a cement based anchor. Cintec anchors can be any size and custom made for things like Window Installation in Rubble Walls or Attachment of face wall to steel beams or columns.

Window Surround Fixing in Rubble Wall – Speedtile or CMU

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When fixing a window in a rubble wall which has inconsistent infill many time mechanical and even resin anchors will nor perform well or consistently. It is in these conditions where a cement based socked anchor provides the ideal solution to cover any voids or cavities. Even in Speedtile or CMU walls this system provides maximum anchorage in a fire rated anchor and is easily installed.

LL 37 Retaining Walls Compliance with SIP vs ROAR added

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Considering there are typically two owners involved in every LL37 Retaining Wall project simplicity is key.

LL 37 Retaining Wall

The philosophy of SIP vs ROAR starts with removing or repairing as little as possible, continues with all operations being performed from the “OWNER’S” side and involves turning an unreinforced masonry structure into a reinforced masonry structure with a series of socked anchors, including post-tensioned, and involving the backfill as necessary but all contained within the fabric of the structure itself. The detail above is but one solution provided in a complete manual designed by Cintec available from ConSpec by placing the words “Cintec Retaining Wall Manual” in the subject line of the contact sheet on this web site ( https://www.conspec-rep.com/contact-us/ ).

ConSpec works with both NYC Licensed Engineers and Specialty Contractors that provide both the designs and construction services necessary to keep your costs and time to an absolute minimum. Again please reach out to us for;

  • Inspection
  • Design
  • Construction

Terracotta Stabilization with Cintec Anchors

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When Thornton Tomasetti had to consider the condition and stability of the terracotta for the Helmsley Building at 230 Park Avenue, including ornate Buffalo Heads, ConSpec’s SIP vs ROAR concept proved appropriate with the replacement of pieces that were beyond repair (Rip-Out-And-Replace) but anchor (Stabilize_In-Place) with Custom Designed Cintec anchors to dramatically reduce overall costs and project completion time.

 

Historic Brick Stabilization at Angkor Wat

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When all local traditional methods for stabilization of the brick structures at Angkor Wat had been exhausted. ConSpec was consulted by the Conservator based on our knowledge and representation of numerous masonry stabilization and strengthening means, methods and materials. To provide the most effective and least intrusive solution we traveled to the site and installed the HeliFix DryFix anchors for their review.