ACI 355.2 2019
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355.2-19: Qualification of Post-Installed Mechanical Anchors in Concrete(ACI 355.2) and Commentary
| Published By | Publication Date | Number of Pages |
| ACI | 2019 | 96 |
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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 3 | TITLE PAGE |
| 7 | CHAPTER 1—SCOPE |
| 9 | CHAPTER 2—DEFINITIONS AND NOTATION 2.1—Definitions |
| 10 | 2.2—Notation |
| 15 | CHAPTER 3—SIGNIFICANCE AND USE |
| 18 | CHAPTER 4—GENERAL REQUIREMENTS 4.1—Testing sequence |
| 27 | 4.2—Test samples |
| 28 | 4.3—Testing by independent testing and evaluation agency and by manufacturer 4.4—Changes to product |
| 31 | CHAPTER 5—REQUIREMENTS FOR TEST SPECIMENS, INSTALLING ANCHORS, AND CONDUCTING TESTS 5.1—Concrete for test members |
| 32 | 5.2—Anchor installation |
| 39 | 5.3—Test methods 5.4—Tests in cracked concrete |
| 40 | 5.5—General requirements for anchor behavior |
| 47 | 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 |
| 50 | 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) |
| 51 | 7.3—Required calculations using results of reference tests |
| 54 | 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) |
| 55 | 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) |
| 56 | 8.5—Reliability under repeated load (Table 4.1a, Test 7, and Table 4.1b, Test 10 for screw anchors) |
| 57 | 8.6—Reliability in cracked concrete where crack width is cycled (Table 4.1b, Test 9) |
| 60 | 8.7—Reliability of screw anchors for brittle failure (Table 4.1a, Test 8, and Table 4.1b, Test 11) |
| 66 | 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) |
| 70 | 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) |
| 71 | 9.3—Service-condition test at minimum edge distance and minimum spacing (Table 4.1a, Test 13, and Table 4.1b, Test 16) |
| 73 | 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) |
| 75 | 9.6—Service condition, simulated seismic shear tests (Table 4.1b, Test 19) |
| 78 | 9.7—Torque tests (Table 4.1a, Test 15, and Table 4.1b, Test 20) – Optional |
| 80 | CHAPTER 10—ESTABLISHING ANCHOR CATEGORIES |
| 81 | 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 |
| 82 | CHAPTER 12—REQUIREMENTS FOR INDEPENDENT TESTING AND EVALUATION AGENCY |
| 83 | CHAPTER 13—REFERENCES Authored documents |
| 84 | 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 |
| 85 | APPENDIX A2—REQUIREMENTS FOR ESTABLISHING CHARACTERISTIC CAPACITIES A2.1—Scope A2.2—Procedure |
| 86 | APPENDIX A3—REQUIREMENTS FOR TEST MEMBERS A3.1—Tests in uncracked concrete A3.2—Tests in cracked concrete |
| 87 | A3.3—Casting and curing of test members |
| 88 | EXAMPLE OF EVALUATION OF A WEDGE-TYPE ANCHOR IN UNCRACKED CONCRETE E1—Anchor specifications |
| 89 | E2—Test results |
| 93 | E4—Establishing anchor category E5—Report of anchor data |
