� (http://www.concrete.org/News/NewsDetail.aspx?f=51686456#)

(http://www.concrete.org/News/NewsDetail.aspx?f=51686456#) �

(http://www.concrete.org/News/NewsDetail.aspx?f=51686456#)

(http://www.concrete.org/Home.aspx)

Home (http://w w w .concrete.org/) > New s (http://w w w .concrete.org/New s.aspx) > New s Detail (http://w w w .concrete.org/New s/New sDetail.aspx)

ACI, in partnership with CRSI, developed the Adhesive Anchor Installation

Certification Program in response to the “Big Dig” accident in Boston, MA.

ADHES I V E ANCHOR I NS TALLATI ON CERTI FI CATI ON P ROGRAM

11/27/2013

In the summer of 2006, a

portion of the concrete roof of

the Central Artery/Tunnel

Project in Boston, Mass., also

known unofficially as the “Big

Dig,” collapsed, killing one

woman and injuring her

husband. 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 CRSI

to develop a

certification program

for Adhesive Anchor

Installers. Adhesive

anchors are

recognized by the

structural design

profession as an

important structural

connection in many

applications.

Adhesive anchor

effectiveness is measured by the bond strength achieved between the adhesive and concrete,

and adhesive and anchor. Adhesive anchor manufacturers have developed installation

procedures for their specific products that when followed, are intended to provide the proper

conditions for the anchor system to achieve that required bond strength.

ACI and CRSI assembled a group of

Subject Matter Experts (SMEs) who

identified the criteria candidates must

meet for certification as ACI/CRSI

Adhesive Anchor Installers. Candidates

are required to complete a certification

test consisting of a 75-question written

exam and a performance exam.

exam and a performance exam.

Candidates must also be able to read,

comprehend, and execute instructions to

properly install adhesive anchors as are

typically provided by adhesive anchor

manufacturers. In addition, candidates must possess the knowledge to properly assess ambient

conditions, the condition of the concrete, 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.

One of the additional resources offered

to increase awareness of adhesive

anchors was a one-day in-person

seminar, “Adhesive Anchors: Their

Behavior and Code Design

Requirements,” covered design

requirements for adhesive anchors that

were first introduced in the 2011 version

of ACI 318, “Building Code Requirements

for Structural Concrete.” The seminar

discussed the material properties of

common adhesives, lessons learned

from failures, tension and shear failure modes, capacity reduction factors, tension and shear

interaction, a qualification standard for adhesive anchors, and design of supplemental

reinforcement, as well as the importance of proper anchor installation procedures in concrete.

The ACI Online Continuing Education Unit (CEU) course “Adhesive Anchors: Reliability,

Environmental Exposure, and Hole Preparation” (http://courseweb.concrete.org/cw/openlist.asp?

#AAI2) provides information on applications, systems, prequalification tests, and characteristics

affecting bond strength of adhesive anchors as well as results of environmental creep behavior

studies. This course, as well as the Adhesive Anchor Installation CEU course provides resources

to the building community.

To learn more about ACI Certification and Education programs, visit www.concrete.org

(http://www.concrete.org/Education).

ACI Home (http://www.concrete.org/Home.aspx)

Contact us (http://www.concrete.org/ContactUs.aspx)

News (http://www.concrete.org/News.aspx)

Career Center (http://www.concrete.org/CareerCenter.aspx)

Browse by Industry Role...

Engineers (http://www.concrete.org/Engineers.aspx)

Educators & Researchers (http://www.concrete.org/EducatorsAndResearchers.aspx)

Contractors (http://www.concrete.org/Contractors.aspx)

Students (http://www.concrete.org/Students.aspx)

Tools

Concrete Terminology (http://www.concrete.org/Tools/ConcreteTerminology.aspx)

ACI Concrete Specification Center (http://www.concrete.org/Tools/ACIConcreteSpecificationCenter.aspx)

318 Information (http://www.concrete.org/Tools/318Information.aspx)

Troubleshooting Surface Imperfections (http://www.concrete.org/Tools/TroubleshootingSurfaceImperfections.aspx)

Frequently Asked Questions (http://www.concrete.org/Tools/FrequentlyAskedQuestions.aspx)

Concrete Related Associations (http://www.concrete.org/Tools/ConcreteRelatedAssociations.aspx)

Concrete International Product Guide (http://www.concreteinternational.com/productguide/index.asp.)

�TOP (HTTP://WWW.CONCRETE.ORG/NEWS/NEWSDETAIL.ASPX?F=51686456#HEADER)

Copyright (http://www.concrete.org/Copyright.aspx) | Privacy Policy (http://www.concrete.org/PrivacyPolicy.aspx) | Disclaimer

(http://www.concrete.org/Disclaimer.aspx) | Media Room (http://www.concrete.org/News/MediaRoom.aspx)

(http://acifoundation.org/) | Sitemap (http://www.concrete.org/ACISiteMap.aspx)