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ACI 355.2 07 2007

$36.56

355.2-07 Qualification of Post-Installed Mechanical Anchors in Concrete & Commentary

Published By Publication Date Number of Pages
ACI 2007 39
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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; undercut anchors.

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PDF Pages PDF Title
3 CONTENTS
5 STANDARD
CHAPTER 1— SCOPE
1.1
1.2
1.3
1.4
1.5
CHAPTER 2— DEFINITIONS AND NOTATION
2.1— Definitions
2.1.1 Anchor category
2.1.2 Anchor group
2.1.3 Anchor system
2.1.4 Characteristic value
2.1.5 Concrete breakout failure
2.1.6 Cracked concrete
2.1.7 Displacement-controlled expansion anchor
2.1.8 Pullout failure
2.1.9 Pull-through failure
2.1.10 Setting of an anchor
2.1.11 Splitting failure
2.1.12 Statistically equivalent
6 2.1.13 Steel failure
2.1.14 Test series
2.1.15 Torque-controlled expansion anchor
2.1.16 Uncracked concrete
7 2.1.17 Undercut anchor
2.2—Notation
8 CHAPTER 3— SIGNIFICANCE AND USE
3.1
CHAPTER 4— GENERAL REQUIREMENTS
4.1— Testing sequence
4.2—Test samples
10 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
5.1.1 Aggregates
5.1.2 Cement
5.1.3 Concrete strength
5.1.4 Test members
5.2—Anchor installation
5.2.1 General requirements
5.2.1.1
5.2.1.2
5.2.1.3
5.2.2 Drill bit requirements
11 5.2.2.1
5.2.2.2
5.2.2.3
5.2.2.4
5.2.2.5
5.2.3 Setting requirements for testing
5.2.3.1 General torque requirements
5.2.3.1.1
5.2.3.2 Setting of torque-controlled expansion anchors
5.2.3.2.1
5.2.3.2.2
5.2.3.3 Setting of displacement-controlled expansion
anchors
5.2.3.3.1 Partial expansion
5.2.3.3.2 Reference expansion
12 5.2.3.4 Setting of undercut anchors
5.3—Test methods
5.4—Tests in cracked concrete
5.4.1
5.4.2
5.4.3
5.4.4 Tolerance on crack width
5.5—General requirements for anchor behavior
5.5.1 Overall load-displacement behavior
5.5.1.1
13 5.5.1.2
5.5.2 Load-displacement behavior at service loads
5.5.3 Modes of failure
14 5.5.3.1
5.5.3.2
5.5.3.3
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
6.3.1
6.3.2 Constituent materials
6.3.3 Quality control
CHAPTER 7— REFERENCE TESTS
7.1— Purpose
7.2—Reference tension tests for single anchors without spacing and edge effects ( Table 4.1, Tests 1 and 2, or Table 4.2, Tests 1, 2, 3, and 4)
7.2.1 Requirements for reference tests
7.3—Required calculations using results of reference tests
7.3.1 For concrete failure
15 7.3.2 For steel failure in tension, cracked and uncracked
concrete
7.3.3 For pullout failure in tension, cracked and uncracked
concrete
CHAPTER 8— RELIABILITY TESTS
8.1— Purpose
8.2—Reliability tests using reduced installation effort ( Table 4.1, Test 3, and Table 4.2, Test 5)
8.2.1 Purpose
8.2.2 General test conditions
8.2.2.1 Torque-controlled expansion anchors
8.2.2.2 Displacement-controlled expansion anchors
8.2.2.3 Torque, load, and displacement-controlled
undercut anchors
8.2.3 Requirements
8.3—Reliability in low-strength concrete with large drill bit ( Table 4.1, Test 4, and Table 4.2, Test 6)
8.3.1 Purpose
8.3.2 General test conditions
8.3.3 Requirements
8.4—Reliability in high-strength concrete with small drill bit ( Table 4.1, Test 5, and Table 4.2, Test 7)
8.4.1 Purpose
8.4.2 General test conditions
8.4.3 Requirements
16 8.5—Reliability under repeated load ( Table 4.1, Test 6)
8.5.1 Purpose
8.5.2 General test conditions
8.5.3 Requirement
8.6—Reliability in cracked concrete where crack width is cycled ( Table 4.2, Test 8)
8.6.1 Purpose
8.6.2 General test conditions
8.6.3
8.6.4
8.6.5 Requirement
17 CHAPTER 9— SERVICE-CONDITION TESTS
9.1— Purpose
9.2—Service-condition tension test with single anchor and with two edges ( corner) ( Table 4.1, Test 7, and Table 4.2, Test 9)
9.2.1 Purpose
9.2.2 Requirements for critical edge distance
9.3—Service-condition test at minimum edge distance and minimum spacing ( Table 4.1, Test 8, and Table 4.2, Test 10)
9.3.1 Purpose
9.3.2 General test conditions
9.3.3
9.3.4
9.3.5
9.3.6 Requirement
9.4—Service-condition shear test for single anchors without spacing and edge effects ( Table 4.1, Test 9, and Table 4.2, Test 11)
9.4.1 Purpose
18 9.4.2
9.5—Service-condition, simulated seismic tension tests ( Table 4.2, Test 12)
9.5.1 Purpose
9.5.2 Tests
9.5.3 Requirements
19 9.6—Service condition, simulated seismic shear tests ( Table 4.2, Test 13)
9.6.1 Purpose
9.6.2 Tests
9.6.3 Requirements
20 CHAPTER 10— ESTABLISHING ANCHOR CATEGORIES
10.1
10.2
CHAPTER 11— PRESENTING ANCHOR DATA
11.1—Data analysis
21 11.2—Format of data sheet
11.3—General requirements
11.4—Contents of evaluation report
11.4.1
11.4.2
11.4.3
CHAPTER 12— REQUIREMENTS FOR INDEPENDENT TESTING AND EVALUATION AGENCY
12.1
12.2
CHAPTER 13— REFERENCES
13.1— Referenced standards
23 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
A3.1.1
A3.1.2
A3.2—Tests in cracked concrete
24 A3.3—Casting and curing of test members
A3.3.1
A3.3.2
25 COMMENTARY
CHAPTER R1— SCOPE
R1.1
R1.4
CHAPTER R2— DEFINITIONS AND NOTATION
R2.1— Definitions
R2.1.4 Characteristic value
R2.1.5 Concrete breakout failure
R2.1.8 Pullout failure
R2.1.9 Pull-through failure
R2.1.12 Statistically equivalent
R2.1.16 Uncracked concrete
R2.2—Notation
CHAPTER R3— SIGNIFICANCE AND USE
R3.1
CHAPTER R4— GENERAL REQUIREMENTS
R4.1— Testing sequence
28 R4.2—Test samples
R4.2.2
R4.2.3
CHAPTER R5— REQUIREMENTS FOR TEST SPECIMENS, INSTALLING ANCHORS, AND CONDUCTING TESTS
R5.1— Concrete for test members
29 R5.1.1 Aggregates
R5.1.2 Cement
R5.1.3 Concrete strength
R5.2—Anchor installation
R5.2.2 Drill bit requirements
R5.2.3 Setting requirements for testing
R5.2.3.1 General torque requirements
R5.2.3.3 Setting of displacement-controlled expansion
anchors
R5.2.3.4 Setting of undercut anchors
R5.4—Tests in cracked concrete
R5.5—General requirements for anchor behavior
R5.5.1 Overall load-displacement behavior
30 R5.5.3 Modes of failure
R5.5.3.2
CHAPTER R6— REQUIREMENTS FOR ANCHOR IDENTIFICATION
R6.3—Verification of conformance to drawings and specifications
R6.3.1
CHAPTER R7— REFERENCE TESTS
R7.2—Reference tension tests for single anchors without spacing and edge effects ( Table 4.1, Tests 1 and 2, or Table 4.2, Tests 1, 2, 3 and 4)
31 R7.2.1 Requirements for reference tests
R7.3—Required calculations using results of reference tests
R7.3.1 For concrete failure
CHAPTER R8— RELIABILITY TESTS
R8.2—Reliability tests using reduced installation effort ( Table 4.1, Test 3, and Table 4.2, Test 5)
R8.3—Reliability in low-strength concrete with large drill bit ( Table 4.1, Test 4, and Table 4.2, Test 6)
R8.4—Reliability in high-strength concrete with small drill bit ( Table 4.1, Test 5, and Table 4.2, Test 7)
R8.5—Reliability under repeated load ( Table 4.1, Test 6)
R8.5.3 Requirement
R8.6—Reliability in cracked concrete where crack width is cycled ( Table 4.2, Test 8)
32 CHAPTER R9— SERVICE-CONDITION TESTS
R9.2— Service- condition tension test with single anchor and with two edges ( corner) ( Table 4.1, Test 7, and Table 4.2, Test 9)
R9.2.2 Requirements for critical edge distance
R9.3—Service-condition test at minimum edge distance and minimum spacing ( Table 4.1, Test 8, and Table 4.2, Test 10)
R9.4—Service-condition shear test for single anchors without spacing and edge effects ( Table 4.1, Test 9, and Table 4.2, Test 11)
R9.5—Service-condition, simulated seismic tension tests ( Table 4.2, Test 12)
R9.6—Service-condition, simulated seismic shear tests ( Table 4.2, Test 13)
33 CHAPTER R11— PRESENTING ANCHOR DATA
CHAPTER R13— REFERENCES
R13.1— Cited references
APPENDIX RA1— REQUIREMENTS FOR NORMALIZATION OF RESULTS
RA1.2— Concrete breakout or splitting failure
RA1.3—Pullout and pull-through failure
APPENDIX RA3— REQUIREMENTS FOR TEST MEMBERS
RA3.2— Tests in cracked concrete
34 EXAMPLE OF EVALUATION OF A WEDGE-TYPE
ANCHOR IN UNCRACKED CONCRETE
E1— ANCHOR SPECIFICATIONS
E2— TEST RESULTS
E3— EVALUATION
E3.1—General
E3.2—Reference tests in uncracked low-strength concrete
E3.3—Reference tests in uncracked high-strength concrete
35 E3.4—Reliability tests, reduced installation effort
36 E3.5—Reliability tests, large hole diameter
E3.6—Reliability tests, small hole diameter
E3.7—Reliability tests, repeated load
E3.8—Service-condition tests, corner test
E3.9—Service-condition tests, minimum edge distance, and spacing
E3.10—Service-condition tests, shear tests
37 E4— Establishing anchor category
E5— Report of anchor data
ACI 355.2 07 2007
$36.56