1705.3 Concrete construction.
BC § 1705.3
The special inspections and verifications for concrete construction shall be as required by this section and Table 1705.3. Exceptions: 1. Special inspection shall not be required when specifically indicated as not required on the approved construction documents for: 1.1. Nonstructural concrete slabs supported directly on the ground, including prestressed slabs on grade, where the effective prestress in the concrete is less than 150 psi (1.03 Mpa). 1.2. Concrete foundation(s) for lightweight fences and recreational equipment. 1.3. Concrete patios, site furnishings, garden walls, driveways, sidewalks and similar construction.
2.Testing required by Table 1705.3, Item 6, may be waived by the registered design professional who prepared the approved structural construction documents when such waiver is specifically indicated on such construction document in the following cases: 2.1. Where the total concrete placement on a given project is less than 50 cubic yards (38.2 m 3 ) 2.2. Isolated spread concrete footings of R-3 buildings three stories or less above grade plane that are fully supported on earth or rock. 2.3. Continuous concrete footings supporting walls of R-3 buildings three stories or less above grade plane that are fully supported on earth or rock where the structural design of the footing is based on a specified compressive strength, f ' c , no greater than 2,500 pounds per square inch (psi) (17.2 Mpa), and the compressive strength used in the footing construction is at least 4,000 psi (27.6 Mpa). Table 1705.3Required Special Inspections and Tests of Concrete Construction TypeContinuousSpecial InspectionPeriodicSpecial InspectionReferenced StandardBC ReferenceConcrete Special Inspector (Cast-In-Place, Precast, & Prestressed)Licensed Concrete Testing LaboratoryTypeContinuousSpecial InspectionPeriodicSpecial InspectionReferenced StandardBC ReferenceConcrete Special Inspector (Cast-In-Place, Precast, & Prestressed)Licensed Concrete Testing Laboratory1. Inspect reinforcement, including prestressing tendons and verify placement.—XACI 318: 3.5, 7.1 - 7.71903.6, 1907.1,1907.7, 1911.4X2. Inspection of reinforcing steel welding in accordance with Table 1705.2, Item 5b.——AWS D1.4ACI 318: 3.5.21903.6.23. Inspect anchors cast in concrete.X—ACI 318: 17.8.21901.3X4. Inspect anchors post-installed in hardened concrete members. cACI 318: 17.8X a. Adhesive anchors installed in horizontally or upwardly inclined orientations to resist sustained tension loads. X b. Mechanical anchors and adhesive anchors not defined in 4a. X5. Verifying use of required design mix.——ACI 318: Ch. 4, 5.2-5.41904, 1905.2 - 1905.4,1911.3X6. Prior to concrete placement, fabricate specimens for strength tests, perform slump and air content tests, and determine the temperature of the concrete. Determine water content when required. ——ASTM C 172ASTM C 31ACI 318: 5.6, 5.8(Notes a, b)1905.6, 1911.10X7.a. Inspect concrete and shotcrete placement for proper application techniques.X—ACI 318: 5.9, 5.101905.9, 1905.10, 1911.6, 1911.7, 1911.8X b. For concrete pumped through a placement boom: Following the lubrication of the concrete placement boom and prior to Contractor's commencement of the concrete pour, observe and document as part of the special inspection of the concrete placement whether the material exiting the hose is concrete exhibiting a uniform matrix of aggregate.8. Verify maintenance of specified curing temperature and techniques. Monitoring of in-place temperatures per thermal protection plan when required.—XACI 318: 5.11-5.131905.11, 1905.13, 1911.9X9. Inspect prestressed concrete for: a. Application of prestressing forces; andX—ACI 318: 18.20ACI 318: 18.18.4—X b. Grouting of bonded prestressing tendons.X10. Inspect erection of precast concrete members.—XACI 318: Ch. 16—X11. Verify in-situ concrete strength, prior to stressing of tendons in post-tensioned concrete and prior to removal of shores and forms from beams and structural slabs.—XACI 318: 6.21906.2—X12. Inspect formwork for shape, location, and dimensions of the concrete member being formed.—XACI 318: 6.1.11906.2X a. Standard sampling rate shall be in accordance with Section 1905.6.2. b. Four-inch by 8-inch cylinders may be accepted in lieu of 6-inch by 12-inch cylinders at the option of the engineer of record. c. Specific requirements for special inspection shall be included in the research report for the anchor issued by an approved source in accordance with 17.8.2 in ACI 318, or other qualification procedures. Where specific requirements are not provided, special inspection requirements shall be specified by the registered design professional and shall be approved by the commissioner prior to the commencement of the work. (Am. L.L. 2023/077, 6/11/2023, eff. 6/11/2023) Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2023/077.
