Farmington Hills, MI and Schaumburg, IL (Oct. 5, 2011) -- The American Concrete Institute (ACI) and Concrete Reinforcing Steel Institute (CRSI) announce the launch of the new Adhesive Anchor Installer Certification program.
In the summer of 2006, a portion of the concrete ceiling of the Central Artery / Tunnel Project in Boston, Mass., also known unofficially as the “Big Dig,” collapsed, killing a motorist and injuring another. The National Transportation Safety Board (NTSB) released its accident report soon after and made recommendations to several parties, including the American Concrete Institute. The recommendation to ACI was to use its “building codes, forums, educational materials, and publications to inform design and construction agencies of the potential for gradual deformation in anchor adhesives under sustained tensile-load applications.”
As part of the overall response to the recommendations of the NTSB, ACI has partnered with the Concrete Reinforcing Steel Institute (CRSI) to develop a certification program for Adhesive Anchor Installers. Additionally, Adhesive Anchor Installer Certification is a new requirement in ACI 318-11, Building Code Requirements for Structural Concrete, for anchorages in sustained tension loading conditions and installation orientations from horizontal to vertically upward (overhead). ACI 318-11 was recently released.
Adhesive anchors are recognized by the structural design profession as an important structural connection in many anchorage-to-concrete applications. Adhesive anchor capacity is dependent on the bond strength achieved between the adhesive and concrete, and adhesive and anchor. Adhesive anchor manufacturers have developed installation procedures for their specific products, which when followed, are intended to provide the proper conditions for the anchor system to achieve the design bond strength.
The certification program for adhesive anchors was fast-tracked with the aid of a certification development consultant, which worked with ACI Committee 601A -- Adhesive Anchor Installer. ACI and CRSI assembled a group of Subject Matter Experts (SMEs) familiar with adhesive anchors, who identified the criteria candidates must meet for certification as ACI/CRSI Adhesive Anchor Installers. Candidates are required to be able to read, comprehend, and execute instructions to properly install adhesive anchors, which are typically provided by adhesive anchor manufacturers. In addition, candidates must possess the knowledge to properly assess ambient conditions and the condition of the concrete; be familiar with materials, equipment, and tools for installing adhesive anchors; and determine when it is appropriate to proceed with an installation or when additional guidance from a supervisor/foreman/project engineer is needed.
“There are many different variables to consider when installing adhesive anchors,” said John W. Nehasil, Managing Director of Certification Programs at ACI. “From understanding jobsite conditions and manufacturers’ instructions to recognizing time limits of the adhesive and proper selection and assembly of equipment, installing adhesive anchors properly involves awareness of the variables and skill in executing instructions. The ACI/CRSI Adhesive Anchor Installer Certification program is designed to verify that candidates possess these qualities.”