APPLICABILITY OF THE KB-TZ2 ANCHOR Usage in components and structural supports in nuclear facilities Review and recommendation concerning testing compliance with USNRC General Design Criterion (GDC) 1, “Quality Standards and Records,” of Appendix A, “General Design Criteria for Nuclear Power Plants,” to 10 CFR Part 50, and Appendix B of ACI 349-01 August 2021
Applicability of the KB-TZ2 Anchor TABLE OF CONTENTS Purpose and Scope 3 Qualification Testing Program 3 Testing Differences among ICC-ES AC193, ACI 355.
Applicability of the KB-TZ2 Anchor Purpose and Scope Hilti has developed a torque-controlled expansion anchor known as the Hilti Kwik Bolt TZ2 (KB-TZ2) for use in concrete and under static and seismic loadings. The purpose of this document is to evaluate the qualification testing performed on the KB-TZ2 Anchor System and determine whether it is in compliance with the requirements of ACI 355.2-01 and ACI 349-01 as recognized by the United States Nuclear Regulatory Commission in USNRC Regulatory Guide 1.199.
Applicability of the KB-TZ2 Anchor Testing Differences among ICC-ES AC193, ACI 355.2-01, and ACI 349-01 Requirements and Resolution of those Differences Testing to be performed or witnessed by an accredited laboratory ACI 355.2-01 in Section 12.1 states that, “The testing and evaluation of anchors under ACI 355.2 shall be performed or witnessed by an independent testing and evaluation agency listed by a recognized accreditation service conforming to the requirements of ISO 17025 and Guide 58.
Applicability of the KB-TZ2 Anchor Method used to calculate the effectiveness factor, k Both ACI 355.2-01 and ACI 349-01 require that the k-factor (effectiveness factor, whose value depends on the type of anchor) reported for the anchors be calculated from the 5% fractile of the test data.
Applicability of the KB-TZ2 Anchor Conclusions and Recommendations The areas where ACI 355.2-01 and ACI 349-01 differ from AC 193 are discussed above. Evidence is provided demonstrating that, while the language of the standards varies, the actual testing and evaluation met their intent and requirements. The remainder of ACI 355.2-01 and ACI 349-01 does not contain any other requirements that are functionally different from AC 193.
Applicability of the KB-TZ2 Anchor References ACI 349-01 Code Requirements for Nuclear Safety Related Concrete Structures; Appendix B, Anchoring to Concrete; American Concrete Institute, Farmington Hills, MI. ACI 355.2-01 Evaluating the Performance of Post-Installed Mechanical Anchors in Concrete; American Concrete Institute; Farmington Hills, MI. ASTM E 488-15, Standard Test Methods for Anchors in Concrete and Masonry Elements; American Society for Testing and Materials; West Conshohocken, PA.
Applicability of the KB-TZ2 Anchor Appendix A Design information for the Hilti Kwik Bolt TZ2 Expansion Anchor in Accordance with ACI 349-01 Appendix B. 1.0 – SCOPE This guide is intended to provide guidance on the design of anchorages using the Hilti Kwik Bolt TZ2 (KB-TZ2) in accordance with ACI 349-01 Appendix B. Note this design varies from current general industry practice following ACI 318 Chapter 17.
Applicability of the KB-TZ2 Anchor Table 2 - Hilti carbon steel KB-TZ2 design information for hammer and core drilled installations, tension 6 Design parameter Effective min. embedment1 Symbol hef Units Nominal anchor diameter (in) 1/4 3/8 1/2 5/8 3/4 1 in.
Applicability of the KB-TZ2 Anchor Table 3 - Hilti stainless steel KB-TZ2 design information for hammer and core drilled installations, tension7 Design parameter Effective min. embedment1 Symbol hef Units Nominal anchor diameter (in) 1/4 3/8 1/2 5/8 3/4 1 in.
Applicability of the KB-TZ2 Anchor Table 4 - Hilti carbon steel KB-TZ2 design information for hammer and core drilled installations, shear 3 Design parameter Anchor O.D. Effective min. embedment1 Symbol da hef Units in. Nominal anchor diameter (in) 1/4 3/8 1/2 5/8 3/4 1 0.250 0.375 0.500 0.625 0.750 1.00 (mm) (6.4) in. 1-1/2 1-1/2 (9.5) 2 2-1/2 1-1/2 2 (12.7) 2-1/2 3-1/4 2-3/4 (15.9) 3-1/4 4 3-1/4 3-3/4 (19.1) 4-3/4 4 (25.
Applicability of the KB-TZ2 Anchor Table 6 - Minimum edge distance, spacing and concrete thickness for KB-TZ2 Setting information Effective min. embedment Min. member thickness Symbol hef hmin Units Nominal anchor diameter (in) 1/4 3/8 1/2 5/8 3/4 1 in. 1-1/2 1-1/2 2 2-1/2 1-1/2 2 2-1/2 3-1/4 2-3/4 3-1/4 4 3-1/4 3-3/4 4-3/4 4 5-3/4 (mm) (38) (38) (51) (64) (38) (51) (64) (83) (70) (83) (102) (83) (95) (121) (102) (146) in.
Applicability of the KB-TZ2 Anchor Figure 4 - Example calculation Given: (2) CS 1/2” KB-TZ2 anchors under static tension load as shown. hef = 3-1/4 in. Slab on grade with f ‘c = 3,000 psi. No supplementary reinforcing. Assume cracked normal-weight concrete. Calculate the design strength in tension for this configuration. Calculation per ACI 349-01 Appendix B and this document. ACI 349-01 Guide Ref. Step 1. Calculate steel strength of anchor in tension Nsa= nAsa,N fut = 2 × 0.
Applicability of the KB-TZ2 Anchor August 2021 Hilti, Inc. 1-800-879-8000 I en español 1-800-879-5000 www.hilti.com Hilti (Canada) Corporation 1-800-363-4458 www.hilti.ca 14 WHD • 08/21 The data contained herein was current as of the date of publication. Updates and changes may be made based on later testing. If verification is needed that the data is still current, please contact the Hilti Technical Support Specialists at 1-877-749-6337.
