1. INTERNATIONAL BUILDING CODE 2012
FROEHLING & ROBERTSON, INC.
INTERNATIONAL BUILDING CODE 2012
Concrete Special Inspections and Code Compliance
Special Inspections
Statewide Code Changes
ACI Mandates
IBC Chapter 17
IBC Chapter 19
SCBCC Special Inspectors
SCBCC Code Enforcement Officers
IBC 2012
AIA Approved Program #IBC318

2. Concrete Special Inspections
IBC 2012, Chapter 17, Section and Table
Concrete construction The special inspections and verifications for concrete construction shall be as required by this section and Table
ACI Building Code Requirements
for Structural Concrete
ACI Old Outgoing Code
NEW
IBC 2012

3. IBC 2012 Chapter 17, Section 1703
Approved Agencies
Approved Agency An approved agency shall provide all information as necessary for the building official to determine that the agency meets the applicable requirements.
Independent An approved agency shall be objective, competent and independent from the contractor responsible for the work being inspected. The agency shall also disclose possible conflicts of interest so that objectivity can be confirmed
IBC 2012

4. Statement of Special Inspections
DGS CO-6b
IBC 2012

5. IBC 2012 Code, Chapter 35, ASTM C 94-13a
Standard Specification for Ready-Mixed Concrete
Materials
Measuring Materials
Batching Plant
Mixing & Delivery
Batch Ticket Information
IBC 2012

6. Sudden Stop! Drunk driver going 99 mph Concrete’s BIG Advantage? Shape
Strength
Durability
Sudden Stop!
IBC 2012

7. Very little damage to the concrete house
Concrete’s Advantage?
After the accident?
Very little damage to the concrete house
IBC 2012

8. Concrete’s Advantage?
OR…
YOU COULD USE WOOD!

9. What ARE Special Inspections?
Who Can Perform Them?
Definition of Special Inspection
IBC 2012, Chapter 2, Section 202
Inspection of construction requiring the expertise of an approved special inspector in order to ensure compliance with this CODE and the approved construction documents.
ASTM C 231
Test for Air Content

10. Two Types of Special Inspections
Continuous (full-time)
Special inspection by the special inspector who IS present when and where the work to be inspected IS being performed.
Periodic (part-time)
Special inspection by the special inspector who is intermittently present where the work to be inspected HAS BEEN or is being performed.

11. IBC 2012, Section 1704.2.4 Report Requirements
“Special Inspectors” shall keep records of inspections. The special inspectors shall furnish inspection reports to the building official and to the registered design professional (RDP) in responsible charge.
PASS/FAIL
COMPLIES
DISCREPANCY

12. STATEWIDE BUILDING CODE
Special Inspections - Concrete
STATEWIDE BUILDING CODE
INTERNATIONAL BUILDING CODE (IBC) - IBC 2012
ACI Building Code Requirements for Reinforced Concrete
ASTM Standards (80 plus) in IBC and the Statewide Code
The CODE does not incorporate ACI 301 “Specifications for Structural Concrete” however, ACI 301 is a part of the construction documents and compliance is mandated.
Approved Contract Documents
IBC 2012

13. Special Inspection Requirements – Concrete
IBC 2012 Table , slide 1 of 2
TABLE
REQUIRED VERIFICATION AND INSPECTION OF CONCRETE CONSTRUCTION
VERIFICATION AND INSPECTION
CONTINUOUS
PERIODIC
REFERENCED STANDARDa
IBC REFERENCE
1. Inspection of reinforcing steel, including prestressing tendons, and placement. – X
ACI 318: 3.5,
1910.4
2. Inspection of reinforcing steel welding in accordance with Table , Item 2b.
AWS D ACI 318: 3.5.2
3. Inspection of anchors cast in concrete where .allowable loads have been increased or where strength design is used.
ACI 318: ,
1908.5,
4. Inspection of anchors post-installed in hardened concrete membersb.
ACI 318: , 8.1.3,
1909.1
5. Verifying use of required design mix.
ACI 318: Ch. 4,
1904.2, ,
6. 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
ASTM C ASTM C ACI 318: 5.6, 5.8
ALL
Table allowable service loads for bolts
continuous

14. VERIFICATION AND INSPECTION
Special Inspection Requirements – Concrete
IBC 2012 Table , slide 2 of 2
TABLE
REQUIRED VERIFICATION AND INSPECTION OF CONCRETE CONSTRUCTION (Continued)
VERIFICATION AND INSPECTION
CONTINUOUS
PERIODIC
REFERENCED STANDARDa
IBC REFERENCE
7. Inspection of concrete and shotcrete placement for proper application techniques. X –
ACI 318: 5.9, 5.10
1910.6, ,
8. Inspection for maintenance of specified curing temperature and techniques.
ACI 318:
1910.9
9. Inspection of prestressed concrete:
a. Application of prestressing forces.
b. Grouting of bonded prestressing tendons in the seismic force-resisting system.
ACI 318:
10. Erection of precast concrete members.
ACI 318:
11. Verification of 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.
ACI 318: 6.2
12. Inspect formwork for shape, location and dimensions of the concrete member being formed
ACI 318:
placement
curing
shapes - dimensions

15. Reinforcing Steel Inspection
Table verification/inspection Tasks #1, #2, #3
Rebar, Welding, Anchor Bolts
Inspection of reinforcing steel
Reinforcing steel welding
Inspection of anchors cast in concrete where allowable loads have been increased or where strength design is used.
Reinforcing Steel Inspection
IBC 2012

16. Table 1705.3 Verification/Inspection Task #4
Post installed concrete anchors
ACI 355 “Qualifications of Post-Installed Mechanical Anchors in Concrete”
ACI , Section 8.1.3
Anchors within the scope of Appendix D installed in concrete to transfer loads between connected elements shall be designed in accordance with Appendix D.
IBC 2012, Chapter 19, Section
Design of anchors installed in concrete for the purpose of transmitting structural loads from one connected element to the other.
IBC 2012

17. Installation and special inspections related to anchors ACI 318-11, Appendix D
D.9 –Installation and inspection of anchors shall be installed and inspected in accordance with ACI , section 1.3
Brush & Blow
Brush Only
Not Cleaned

18. ACI 318-11, Appendix D, Section D.9.2.2
Anchors
Section D requires “Installation of adhesive anchors horizontally or upwardly inclined to support 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.”
IBC 2012

19. ACI 318-11, Appendix D, Section D.9.2.2
Anchors
Section D requires “Installation of adhesive anchors horizontally or upwardly inclined to support 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.”
IBC 2012

20. Table 1705.3 Verfication/Inspection Task #5
Verifying the Use of (Approved) Concrete Mix Designs
ACI 318, Method #1
Section Sample Standard Deviation
Materials, quality control procedures, and conditions similar to those expected on project for which the mixtures are being proposed
Shall consist of at least 30 consecutive tests or two groups of consecutive tests totaling at least 30 tests as defined in
Section Modification Factor when less than 30 tests are available
The KEY is consecutive tests, same materials, same QC conditions, etc.

21. ACI 318 Concrete Mix Design Proportions
Inspection task #5 (continued)
ACI 318, Method #2 Section Concrete Trial Mixtures
Materials shall be those that will be used for proposed work
At least three different mixtures with different water-cement ratios
Trial mixes will be proportioned so as to have slump within .75” of proposed slump and within .5% of maximum allowable air content
IBC 2012

22. ACI 318 Concrete Mix Design Proportions
Inspection task #5 (continued)
ACI 318 Method #3
Section 5.4 Proportioning without Field Experience or Trial Mixtures
Materials shall be those that will be used for proposed work and shall have an average compressive strength of 1200 psi greater than design strength
Concrete proportioned by this section (5.4) shall conform to the durability requirements of Chapter 4 and to compressive strength criteria of Section 5.6

23. Table 1705.3 Verification/Inspection Task #6
Field Tests & Inspections
Concrete QC tests are required by the statewide code and IBC 2012
Compressive Strength Test
Slump Test
Air Content Test
Temperature Determination
ASTM C 172 Sampling Concrete
ASTM C 31 - Making Test Specimens
(Initial 60° to 80° 48 hours)
WHERE?
IBC 2012

24. Sampling Freshly Mixed Concrete
ASTM C
Sample concrete from concrete chute
ASTM C , Section 5, Note 2
Sampling should normally be performed as the concrete is delivered from the mixer to the conveying vehicle used to transport the concrete to the forms (or point of final placement); however, specifications may require other points of sampling, such as the discharge of a concrete pump.
IBC 2012

25. Duties and responsibilities of Contractor
INITIAL CURING OF FIELD CONCRETE SPECIMENS
ACI , section d
Duties and responsibilities of Contractor
Provide space and source of electrical power on the project site for facilities to be used for initial curing of concrete test specimens as required by ASTM C 31, for the sole use of Owner’s quality assurance testing agency.
IBC 2012

26. Responsibilities of Owner’s Testing Agency
INITIAL CURING OF FIELD CONCRETE SPECIMENS
ACI , section e
Responsibilities of Owner’s Testing Agency
Owner’s testing agency will conduct concrete strength tests during construction by making and curing test specimens according to ASTM C 31 and testing them according to ASTM C 39.
Concrete strengths for acceptance shall be the average of:
2 cylinders if 6”x 28 days cylinders if 4” x 28 days
IBC 2012

27. INITIAL CURING OF FIELD CONCRETE SPECIMENS
ASTM C 31-12, Section

28. Table 1705.3 Verification/Inspection Task #7
Conveying and Depositing Concrete
IBC 2012, Table , item #7
ACI 318 Sections 5.9 and 5.10 Concrete Placement
Conveying from truck to point of placement without segregation, proper consolidation
Top surfaces of vertically formed lifts to be generally level
All construction joint requirements in ACI 318, Section 6.4 are required as a part of the building code

29. Application of Concrete Curing Compound
Table Verficaton/Inspecion Task #8
Curing, Temperature and Techniques
IBC 2012, Table
ACI 318 Section
Concrete (other than high early strength) shall be maintained above 50° and in a moist condition for at least the first 7 days after placement except when cured under accelerated curing conditions.
Hot weather (ACI 305) and cold weather (ACI 306) concrete requirements shall be followed as stipulated in ACI 318, Sections 5.12 and 5.13
ACI 318, Section 5.11 suggests following the recommendations set forth in the “Guide to Curing Concrete” (ACI 308)
Application of Concrete Curing Compound
IBC 2012

30. Pre-Stressed Concrete Casting Bed
Table Verification/Inspection task #9
Inspection of Pre-Stressed Concrete
IBC 2012, Table
Continuous Special Inspections Required
8a. Application of Pre-Stressing Forces
Application and measuring force
Verifying jack calibrations
Measuring elongation of tendons
8b. Grouting of Bonded Pre-Stressing Tendons in the Seismic-Force-Resisting System
Materials to produce grout
Grout proportions
Mixing and pumping grout
Pre-Stressed Concrete Casting Bed
ACI 318, Sections and 18.20
IBC 2012

31. Precast Concrete Panel Installation
Table Verifcation/Inspection task #10
Erection of Precast Concrete Members
IBC 2012, Table
Periodic Special Inspections Required on Embeds
Bolted connections receive periodic inspection
All (100%) of welded connections must receive visual inspection in accordance with AWS D1.1
ACI 318, Chapter 16
AWS D1.1, Section 6 mandates VT on welds
Precast Concrete Panel Installation
IBC 2012

32. Post-Tensioned Concrete Slab
Table Verification/Inspection Task #11
Inspection of Post-Tensioned Concrete
IBC 2012, Table
ACI 318, Chapter 16
Periodic Special Inspections Required
Verification of 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
Application and measuring force
Verifying jack calibrations
Measuring elongation of tendons
Post-Tensioned Concrete Slab
IBC 2012

33. Concrete Form Inspection
Table Verification/Inspection Task #12
Inspection of Formwork
IBC 2012, Table (ACI 318, section 6.1.1)
Inspect forms for shape, location, and dimensions of the concrete member being formed.
Conforms to shape, lines, and dimensions of the members as required by the drawings and specifications
Sufficiently tight to prevent leakage of mortar
Properly braced and tied to maintain shape
Forms and supports designed so as not to damage previously placed concrete or in-situ structure
Concrete Form Inspection
IBC 2012

34. VUSBC 2009 - 2012 Significant Code Changes - FORMS
Table , Task #12
IBC Inspect formwork for shape, location and dimensions of the concrete member being formed. ACI 318, section 6.1.1
Nominal dimensional inspection tasks required
VUSBC 2009 expanded inspection to all of ACI 318, sections 6.1 and VUSBC 2012 falls in line with IBC 2012.
Dimensions, form tightness, bracing, ties, supports, construction load, impact loads, form removal, shores, reshoring, and some degree of structural analysis.

35. Placing Concrete by Pumping Methods ACI 304.2R-96
Combined FA & CA is 66% to 75% mix volume
Mortar content versus aggregate (size) 16% - 18%
Select nominal maximum size aggregate properly
Water reducing admixtures
Mixture CA amount can be reduced by 5% to 10%
(ACI 211, Section )
Field quality control (truck and point of placement)
Collect test data at ready mix truck and placement
Two trucks at pump hopper (staging/testing)
Lightweight (Aggregate/Moisture Compensation)
(pre-soak)
Pumping Concrete

36. Placing Concrete by Pumping Methods ACI 304.2R-96
Most common diameters of pipeline are 4” and 5”
Flexible hose – fabric and wire-reinforced
3 x more pressure to pump through hose (pipe)
Keep bends in pipe line to minimum
Avoid gap-graded aggregates
Insert #7, #8, #89 stone in coarse CA fractions
15% - 30% should pass #50 screen in FA fraction
5% - 10% should pass the #100 screen in FA
Pumping Concrete
Any admixture that increases the workability in both normal and lightweight concretes will usually improve pumpability.
IBC 2012

37. Compressive Strength Test
Addressing Concrete Test Specimen Failures
ACI 318, Section
Strength level of an individual class of concrete shall be considered satisfactory if both of the requirements are met:
Every arithmetic average of any three consecutive strength tests equals or exceeds design strength (f’c)
2. No individual strength test (average of two cylinders) falls below f’c by more than 500 psi when f’c is 5000 psi or less; or by more than .10 f’c when f’c is more than 5000 psi.
Compressive Strength Test
IBC 2012

38. Pre-Construction Meetings
Project team members should meet prior to the commencement of construction activities to discuss special inspections and testing scope.
Suggested Attendees:
Owner or Owner’s Representative
Structural Engineer
Architect
Construction Manager
General Contractor
Building Official
Testing Agency
Concrete Supplier
Placing and Finishing Contractor
Concrete Pumping Company
Admixture Supplier
Other Specialty Suppliers (as appropriate)
IBC 2012

39. IBC 2012 Chapter 17, Section 1705.3 and Chapter 19, ACI 318
Concrete Pre-Construction Checklists
IBC Chapter 17, Section and Chapter 19, ACI 318
Have concrete mix design submittals been approved?
Do mix designs comply with ACI 318, Chapters 4 and 5?
Do approved mix designs comply with project specifications?
Specialty materials: fly ash, fibers, mid-range, Super P, color, other
Concrete delivery tickets (ASTM C 94-14) Section 14
(class, aggregate/moisture compensation, mix water, mixing times)
Project specification limits on slump, air, temperature, mixing times

40. Concrete Pre-Construction Checklists
Discuss cold and hot weather procedures
Will the concrete be pumped? Where will testing/specimens be done?
What will be the average size of concrete placement? Largest size?
Who is responsible for the addition of mix water at the job site?
Discuss methodology for determining total amount of mix water
Discuss concrete QC tests and acceptability parameters.
Frequency of samples; number of test specimens, extra test specimens
Are field cure specimens required? Discuss validity of field cures.
IBC 2012

41. Concrete Pre-Construction Checklists
Initial Curing of Test Specimens (ASTM C31, section 10) Discuss plan.
Size of test specimens: 6” x 12” or 4” x 8” (4” x 8” - three 28 day tests)
Discuss pick up of test specimens (weekends, holidays)
Placement and finishing procedures (rebar, wire fabric, joint patterns)
Protection of slabs due to evaporation (retardants, wind breaks, misting)
Procedures for placing and finishing during extreme climatic conditions
Proper people to discuss discrepancies with at job site?
IBC 2012

42. Alan Tuck, Executive Director ©Froehling & Robertson, Inc. 2009
Any Questions?
For further information please contact:
Alan Tuck, Executive Director
CODE COMPLIANCE & TRAINING
(office)
(cell)
Copyright Materials
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©Froehling & Robertson, Inc. 2009
IBC 2012