Durability of Brick Veneer: Remediation of helical anchors

by Molly Doyle | January 17, 2014 10:21 am

For improper original brick tie placement, remediation of the veneer system is possible through the use of helical anchors in lieu of complete replacement of the cladding. The anchors are installed through the mortar joints into the structural framing members through the process outlined below. (Other types of helical anchors are available beyond the type used in the project shown.)

A. Structural framing member is located by removing a masonry unit and drilling holes until structural member is located. Pilot holes should be sealed before reinstalling masonry unit. (In steel stud framing, the structural member can be located using a metal detector.)[1]
A) Structural framing member is located by removing a masonry unit and drilling holes until structural member is located. Pilot holes should be sealed before reinstalling masonry unit. (In steel stud framing, the structural member can be located using a metal detector.)
B) Remedial anchor spacing is measured and marked on the face of the masonry.[2]
B) Remedial anchor spacing is measured and marked on the face of the masonry.
C) The pilot hole is drilled through the mortar joint using a drill bit one size smaller than the diameter of the helical anchor. If it fails to be located at framing member, helical anchor should be installed to seal the hole; this anchor is installed for waterproofing purposes and should be considered as a veneer anchor.[3]
C) The pilot hole is drilled through the mortar joint using a drill bit one size smaller than the diameter of the helical anchor. If it fails to be located at framing member, helical anchor should be installed to seal the hole; this anchor is installed for waterproofing purposes and should be considered as a veneer anchor.
D) Helical anchor is installed using specialized drill bit as recommended by the manufacturer. Embed anchor a minimum of 51 mm (2 in.) into framing member or as recommended by the manufacturer.[4]
D) Helical anchor is installed using specialized drill bit as recommended by the manufacturer. Embed anchor a minimum of 51 mm (2 in.) into framing member or as recommended by the manufacturer.
E) Helical anchor is covered using mortar to match surrounding.[5]
E) Helical anchor is covered using mortar to match surrounding.
F) Tensile testing is performed by manufacturer to confirm adequate pullout strength.[6]
F) Tensile testing is performed by manufacturer to confirm adequate pullout strength.

To read the full article, click here[7].

 

Endnotes:
  1. [Image]: http://www.constructionspecifier.com/wp-content/uploads/2014/04/1.-Remove-brick-to-confirm-stud.jpg
  2. [Image]: http://www.constructionspecifier.com/wp-content/uploads/2014/04/21.jpg
  3. [Image]: http://www.constructionspecifier.com/wp-content/uploads/2014/04/3.-Drill-pilot-hole.jpg
  4. [Image]: http://www.constructionspecifier.com/wp-content/uploads/2014/04/4.-Install-anchor.jpg
  5. [Image]: http://www.constructionspecifier.com/wp-content/uploads/2014/04/5.-Cover-helical-tie..jpg
  6. [Image]: http://www.constructionspecifier.com/wp-content/uploads/2014/04/6.-Testing.jpg
  7. here: http://www.constructionspecifier.com/masterformat/durability-of-brick-veneer-a-deeper-look-at-masonry-anchors/

Source URL: https://www.constructionspecifier.com/durability-of-brick-veneer-remediation-helical-anchors/

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