355.2-19: Qualification of Post-Installed Mechanical Anchors in Concrete(ACI 355.2) and Commentary

355.2-19: Qualification of Post-Installed Mechanical Anchors in Concrete(ACI 355.2) and Commentary

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Description

ACI 355.2 prescribes testing programs and evaluation requirements for post-installed mechanical anchors intended for use in concrete under the design provisions of ACI 318. Criteria are prescribed for determining whether anchors are acceptable for use in uncracked concrete only, or in cracked as well as uncracked concrete. Performance categories for anchors are established, as are the criteria for assigning anchors to each category. The anchor performance categories are used by ACI 318 to assign capacity reduction factors and other design parameters.

Keywords:

anchors; cracked concrete; expansion anchors; fasteners; mechanical anchors; post-installed anchors; screw anchors; undercut anchors.

 

Document Details

Author: ACI Committee 355

Pages: 92

ISBN: 9781641950664

Categories: Anchors

Formats: PDF

Table of Contents

CHAPTER 1—SCOPE

CHAPTER 2—DEFINITIONS AND NOTATION

2.1—Definitions

2.2—Notation

CHAPTER 3—SIGNIFICANCE AND USE

CHAPTER 4—GENERAL REQUIREMENTS

4.1—Testing sequence

4.2—Test samples

4.3—Testing by independent testing and evaluation agency and by manufacturer

4.4—Changes to product

CHAPTER 5—REQUIREMENTS FOR TEST SPECIMENS, INSTALLING ANCHORS, AND CONDUCTING TESTS

5.1—Concrete for test members

5.2—Anchor installation

5.3—Test methods

5.4—Tests in cracked concrete

5.5—General requirements for anchor behavior

CHAPTER 6—REQUIREMENTS FOR ANCHOR IDENTIFICATION

6.1—Determination of critical characteristics of anchors

6.2—Specification of critical characteristics of anchors

6.3—Verification of conformance to drawings and specifications

CHAPTER 7—REFERENCE TESTS

7.1—Purpose

7.2—Reference tension tests for single anchors without spacing and edge effects (Table 4.1a, Tests 1 through 3, or Table 4.1b, Tests 1 through 5)

7.3—Required calculations using results of reference tests

CHAPTER 8—RELIABILITY TESTS

8.1—Purpose

8.2—Reliability tests using reduced installation effort (Table 4.1a, Test 4, and Table 4.1b, Test 6)

8.3—Reliability in low-strength concrete with large drill bit (Table 4.1a, Test 5, and Table 4.1b, Test 7)

8.4—Reliability in high-strength concrete with small drill bit (Table 4.1a, Test 6, and Table 4.1b, Test 8)

8.5—Reliability under repeated load (Table 4.1a, Test 7, and Table 4.1b, Test 10 for screw anchors)

8.6—Reliability in cracked concrete where crack width is cycled (Table 4.1b, Test 9)

8.7—Reliability of screw anchors for brittle failure (Table 4.1a, Test 8, and Table 4.1b, Test 11)

8.8—Reliability tests of screw anchors to setting method (Table 4.1a, Tests 9, 10, and 11, or Table 4.1b, Tests 12, 13, and 14)

CHAPTER 9—SERVICE-CONDITION TESTS

9.1—Purpose

9.2—Service-condition tension test with single anchor and with two edges (corner) (Table 4.1a, Test 12, and Table 4.1b, Test 15)

9.3—Service-condition test at minimum edge distance and minimum spacing (Table 4.1a, Test 13, and Table 4.1b, Test 16)

9.4—Service-condition shear test for single anchors without spacing and edge effects (Table 4.1a, Test 14, and Table 4.1b, Test 17)

9.5—Service-condition, simulated seismic tension tests (Table 4.1b, Test 18)

9.6—Service condition, simulated seismic shear tests (Table 4.1b, Test 19)

9.7—Torque tests (Table 4.1a, Test 15, and Table 4.1b, Test 20) – Optional

CHAPTER 10—ESTABLISHING ANCHOR CATEGORIES

CHAPTER 11—PRESENTING ANCHOR DATA

11.1—Data analysis

11.2—Format of data sheet

11.3—General requirements

11.4—Contents of evaluation report

CHAPTER 12—REQUIREMENTS FOR INDEPENDENT TESTING AND EVALUATION AGENCY

CHAPTER 13—REFERENCES

Authored documents

MANDATORY APPENDIXES:

APPENDIX A1—REQUIREMENTS FOR NORMALIZATION OF RESULTS

A1.1—Normalization of capacities to take account of concrete and steel strengths

A1.2—Concrete breakout or splitting failure

A1.3—Pullout and pull-through failure

A1.4—Steel failure

APPENDIX A2—REQUIREMENTS FOR ESTABLISHING CHARACTERISTIC CAPACITIES

A2.1—Scope

A2.2—Procedure

APPENDIX A3—REQUIREMENTS FOR TEST MEMBERS

A3.1—Tests in uncracked concrete

A3.2—Tests in cracked concrete

A3.3—Casting and curing of test members

EXAMPLE OF EVALUATION OF A WEDGE-TYPE ANCHOR IN UNCRACKED CONCRETE

E1—Anchor specifications

E2—Test results

E4—Establishing anchor category

E5—Report of anchor data

ERRATA INFO

Any applicable errata are included with individual documents at the time of purchase. Errata are not included for collections or sets of documents such as the ACI Collection. For a listing of and access to all product errata, visit the Errata page.

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