Concrete - Cast-in-place & Precast
BC 1704.4
1704.4 Concrete construction. The special inspections and verifications for concrete construction shall be as required by this section and Table 1704.4.
Exception: Special inspections shall not be required for the following when specifically exempted on the approved construction documents:
- Concrete placement of less than 50 cubic yards (38 m3)‡ provided that the concrete is nonstructural and is not subject to the durability requirements of Section 1904. In such case, testing may be waived by the registered design professional who prepared the structural construction documents.
- 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).
- Concrete foundation(s) for lightweight fences and recreational equipment.
- Concrete patios, site furnishings, garden walls, driveways, sidewalks and similar construction.
| Special Inspection: | Concrete- Cast in-place and precast |
| Code Section(s): | BC 1704.4 |
| Minimum Qualifications: | Primary Inspector or Inspection Supervisor. a. PE or RA; and 1 year relevant experience |
| Supplemental Inspector (Alternative 1), a. ACI Certification as Concrete Construction Special Inspector (ACI-CCSI) OR b. ICC Certification as Concrete Special Inspector (ICC-CSI) |
|
| Supplemental Inspector (Alternative 2) a. ACI Certification as an Associate Concrete Construction Special Inspector (ACI-ACCSI) Note: ACI-ACCSI only permitted to perform inspection under on-site supervision by PE, RA, ACI-CCSI, or ICC-CSI |
| Inspection Task: | Inspection Interval (Continuous/Peri odic) | NYC Construction Code Reference Section | Reference Standard (e.g. ASTM X1234) | Baseline Document (Approved plans, Shop Drawings, Manufacturer’s Instructions, etc.) | Comments (e.g. needs test performed by Approved Testing Agency) |
| 1. Inspection of Reinforcing steel, including placement | Periodic. | 1903.5, 1907.1, 1907.7, 1914.4 | ACI 318:3.5, 7.1-7.7 | • Approved plans and shop drawings | |
| 2. Inspection of reinforcing steel welding a) Weldability b) Flexural and axial reinforcement c) Shear reinforcement d) Other reinforcement |
a) Periodic
b) Continuous c) Continuous d) Periodic |
1903.5.3 | AWS D1.4,
ACI 318:3.5.2 |
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| 3. Inspect bolts to be installed prior to and during placement of concrete where allowable loads have been increased | Continuous | 1912.5 | • Approved plans, shop drawings and manufacturer’s instructions | ||
| 4. Verify use of required design mix | Periodic | 1904, 1905.2-1905.4, 1914.2, 1914.3 | ACI 318: Ch 4, 5.2-5.4 | • Approved Specifications
• Approved Material submittals |
|
| 5. At the time fresh concrete is sampled to fabricate specimens for strength tests, perform slump and air content tests, and determine the temperature of the concrete | Continuous | 1905.6
1914.10 |
ASTM C 172
ASTM C31 ACI 318;5.6.5.8 (Note a,b) |
• Approved Specifications
• Approved Material submittals |
|
| 6. Inspection of concrete and shotcrete placement for proper application techniqures | Continuous | 1905.9
1905.10 1914.6 1914.7 1914.8 |
ACI 318:5.9, 5.10 | • Approved plans
• Approved shop drawings |
|
| 7. Inspection for maintenance of specified curing temperatures and techniqures | Periodic | 1905.11
1905.13 1914.9 |
ACI 318:5.111-5.13 | • Approved Specifications
• Approved material submittals |
|
| 8. Erection of precast concrete members | Periodic | ACI 318: Ch 16 | • Approved drawings
• Approved shop drawings |