CONCRETE ACCESSORIES SPECIFICATIONS
Radha Krishna Temple Construction
SECTION 031500 – CONCRETE ACCESSORIES
PART 1 - GENERAL
A. Related Documents:
1. Drawings and general provisions of the Subcontract apply to this Section.
2. Review these documents for coordination with additional requirements and information that apply to work under this Section.
B. Section Includes:
1. Anchors installed in hardened concrete, including but not limited to:
a. Expansion type anchors.
b. Powder driven fasteners.
c. Epoxy anchors.
d. Inspection and testing of concrete anchors.
C. Related Sections:
1. Division 01 Section "General Requirements."
2. Division 01 Section "Special Procedures."
3. Division 03 Section “Cast-in-Place Concrete”
4. Division 23 Section "Supports and Anchors."
1.The following documents form part of the Specifications to the extent stated. Where differences exist between codes and standards, the one affording the greatest protection shall apply.
2.Unless otherwise noted, the referenced standard edition is the current one at the time of commencement of the Work.
3.Refer to Division 01 Section "General Requirements" for the list of applicable regulatory requirements.
B. International Code Council (ICC)
1. ICC Evaluation Reports.
2. AC193 Acceptance Criteria for Mechanical Anchors in Concrete Elements
3. AC308 Acceptance Criteria for Post-Installed Adhesive Anchors in Concrete Elements
C. American Concrete Institute (ACI)
1. ACI 318 Building Code Requirements for Structural Concrete
2. ACI 355.2 Qualification of Post-Installed Mechanical Anchors in Concrete
3. ACI 355.4 Qualification of Post-Installed Adhesive Anchors in Concrete
A. Submit under provisions of Division 01 Section "General Requirements."
B. Product Data: For each anchor type scheduled for use. Include active ICC Evaluation Report.
1.4 QUALITY ASSURANCE
A. Each anchor proposed for use shall have a current ICC Evaluation report indicating allowable capacity in applicable concrete substrate materials.
1.5 PROJECT CONDITIONS
A. [Fill over deck is lightweight concrete.]
B. [Cast-in-place normal weight concrete.]
PART 2 - PRODUCTS
2.1 CONCRETE ANCHORS
A. Torque-Controlled Expansion Anchors: Kwik Bolt TZ, by Hilti (ICC ESR-1917), Strong-Bolt 2 by Simpson (ICC ESR-3037), or approved equal.
B. Powder Driven Fasteners: X-U fasteners as manufactured by Hilti, Inc. (ICC- ESR-2269), or approved equal.
C. Epoxy Adhesive (Cartridge-Type): ICC approved, two-component structural epoxy; prepackaged in cartridges for manually or pneumatically operated caulk gun and automatically mixed at nozzle. Subject to compliance with requirements provide one of the following:
HIT-RE 500-V3 Adhesive Anchoring System, Hilti, Inc. (ICC ESR-3814).
HIT-HY 200 Adhesive Anchoring System, Hilti, Inc. (ICC ESR-3187).
SET-XP Adhesive Anchoring Systems, Simpson Strong-Tie Co. (ICC ESR-2508).
2.2 ANCHOR RESTRICTIONS
A. Wedge-type Anchors: Acceptable for applications within the limitations of the applicable ICC report. Anchors shall conform to the current edition of ICC-ES Acceptance Criteria for Mechanical Anchors in Concrete Elements (AC193), including the requirements of the current edition of ACI 355.2.
B. Shell-type (drop-in) Anchors are not permitted.
C. Powder Driven Fasteners: Shall not be used in applications requiring resistance to forces due to wind or earthquake forces or tension forces due to gravity, except where permitted by the applicable ICC report
D. Epoxy Anchors: Acceptable for applications within the limitations of the applicable ICC report and shall not be used to fasten overhead, wall mounted or fire resistive construction. Epoxy shall conform to the current edition of ICC-ES Acceptance Criteria for Post-Installed Anchors in Concrete (AC308), including the requirements of the current edition of ACI 355.4. Epoxy dowels shall not be used for substitution of lap splices.
PART 3 - EXECUTION
A. Examine areas to be drilled to verify conditions of access, interferences, and existing materials.
B. Locate existing reinforcing steel, which might interfere with drilling, with a suitable metal detector.
A. Holes for anchors and dowels shall be located to miss existing reinforcing steel wherever practical.
1. Where reinforcement is encountered and anchor cannot be shifted, install wedge type anchor with minimum 4 anchor diameter embedment above bottom of reinforcement.
B. Hole diameter shall be as specified in the applicable ICC Report for the size and type of anchor or dowel to be installed. Hole depth shall be as necessary to obtain the embedment specified on the drawings.
C. Holes shall be prepared as specified in the applicable ICC Report. At a minimum, holes shall be cleaned of all dust and debris prior to installation of anchors or dowels. Cleaning shall consist of removal of debris with oil free compressed air (90 psi (632 gr/cm²), minimum), brushing of the hole twice in a twisting motion with a nylon brush and removal of debris with oil free compressed air (90 psi (632 gr/cm²), minimum).
D. Wedge-type anchors shall be installed to the minimum torque specified in the applicable ICC Report.
E. Installation of epoxy anchors horizontally or upwardly inclined to support sustained tension loads shall be performed by personnel certified by an applicable certification program. Certification shall include written and performance tests in accordance with the ACI/CRSI Adhesive Anchor Installer Certification program, or equivalent.
3.3 FIELD QUALITY CONTROL
A. The Testing Laboratory will:
1. Special Inspect installation of anchors in accordance with the current edition of the California Building Code, the current edition of ACI 318, and the applicable ICC Evaluation Report.
2. Develop and utilize an effective method of field marking anchor and dowel test locations and results.
B. Epoxy anchors installed in horizontal or upwardly inclined orientations to resist sustained tension loads shall be continuously inspected during installation.
C. Test 25 percent of torque controlled mechanical anchors installed on a given day in tension using pullout procedure, unless more frequent tests are specified in the Contract Documents. Test to 80% of specified yield strength of the dowel or 150% of the calculated load capacity, whichever is the lesser. Alternatively, the anchors may be torque tested to their installation torque. Anchors specifically noted on the drawings as “No test required” do not require tension testing.
D. Test 25 percent of reinforcing steel dowels and threaded rods installed with epoxy on a given day in tension using pullout procedure, unless more frequent tests are specified in the Contract Documents. Test to 80% of specified yield strength of the dowel or 150% of the calculated load capacity, whichever is the lesser. Dowels specifically noted on the drawings as “No test required” do not require tension testing.
E. Pull test 25 percent of epoxy-type anchors installed on a given day in tension using pullout procedure, unless more frequent tests are specified in the Contract Documents. Test to 80% of specified yield strength of the anchor or 150% of the calculated load capacity, whichever is the lesser.
F. Where less than 100 percent of the anchors are specified to be tested, if the failure rate of anchors or dowels exceeds 10 percent, testing shall be increased to 100 percent of that day’s installation of similar anchors or dowels. Testing can then be reduced to 25 percent of that day’s installation when the failure rate is reduced to 10 percent or less.
G. Failed anchors and dowels shall be replaced at no additional cost to the University and the Subcontractor shall reimburse the University for the cost of additional testing.
END OF SECTION 031500