Section 1705A — California Building Code (Title 24, Part 2)

REQUIRED SPECIAL INSPECTIONS AND TESTS

1705 A .1 General. Special inspections and tests of elements and nonstructural components of buildings and structures shall meet the applicable requirements of this section.

1705 A .1.1 Special cases. Special inspections and tests shall be required for proposed work that is, in the opinion

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shall be as those for an AWS certified welding inspector (CWI), as defined in the provisions of the AWS QC1.

[DSA-SS, DSA-SS/CC] Welding inspector approval by the enforcement agency shall occur when specified in the California Administrative Code. Nondestructive testing shall be performed by qualified NDT Level II personnel employed by the approved agency.

The welding inspector shall make a systematic daily record of all welds. In addition to other required records, this record shall include:

1. Identification marks of welders. 2. List of defective welds. 3. Manner of correction of defects.

The welding inspector shall check the material, details of construction and procedure, as well as workmanship of the welds. The inspector shall verify that the installation of end-welded stud shear connectors is in accordance with the requirements of Section 2213A.2 ( [DSA-SS/CC] 2212.6.2) and the approved plans and specifications. The approved agency shall furnish the architect, structural engineer, and the enforcement agency with a verified report that the welding has been done in conformance with AWS D1.1, D1.3, D1.4, D1.8, and the approved con- struction documents.

1705A.2.6 Special inspection and tests of high-strength fastener assemblies.¶

fastener assemblies. Special inspections and tests for high-strength fasteners shall be in accordance with this section, Section 1705A.2.1, and Table 1705A.2.1. Tests of high-strength bolts, nuts, and washers shall be in accordance with Section 2213A.1 ([DSA-SS/CC] 2212.6.1).

[DSA-SS, DSA-SS/CC] The minimum requirements for a qualified high-strength bolting special inspector shall be an International Code Council certified Structural Steel and Bolting Special Inspector (S1).

1705 A .3 Concrete construction. Special inspections and tests of concrete construction shall be performed in accordance with this section and Table 1705 A .3.

Exception: Special inspections and tests shall not be required for concrete patios, driveways and sidewalks, on grade.

1705 A .3.1 Welding of reinforcing bars. S pecial inspections of welding and qualifications of special inspectors for reinforcing bars shall be in accordance with 1705A.2.5, the requirements of AWS D1.4 for special inspection and of AWS D1.4 for special inspector qualification.

1705 A .3.2 Material tests. In the absence of sufficient data or documentation providing evidence of conformance to quality standards for materials in Chapters 19, 20 , and 26 of ACI 318, as modified by Chapter 19A, the building official shall require testing of materials in accordance with the appropriate standards and criteria for the material in Chapters 19, 20 , and 26 of ACI 318 as modified by Chapter 19A. Tests of reinforcing bars shall be in accordance with Section 1910A.2 ( [DSA-SS/CC] 1909.2.4).

[DSA-SS, DSA-SS/CC] Modify AISC 360, Section N5.5(b), as follows:

For structures in Risk Category II, III or IV, UT shall be performed by QA on all complete-joint-penetration (CJP) groove welds subject to transversely applied tension loading in butt, T- and corner joints, in material ⁵ /16 in. (8 mm) thick or greater.

1705 A .2.2 Cold-formed steel deck. Special inspections for cold-formed steel floor and roof deck shall be in accordance with the quality assurance inspection requirements of SDI QA/QC.

Deck weld special inspection and testing shall also satisfy requirements in Table 1705A.2.1 and Section 1705A.2.5.

1705 A .2.3 Open-web steel joists and joist girders. Special inspections of open-web steel joists and joist girders in buildings, structures and portions thereof shall be in accordance with Table 1705 A .2.3.

1705A.2.3.1 Steel joist and joist girder inspection.¶

Special inspection is required during the manufacture and welding of steel joists or joist girders. The approved agency shall verify that proper quality con- trol procedures and tests have been employed for all materials and the manufacturing process, and shall perform visual inspection of the finished product. The approved agency shall place a distinguishing mark, and/or tag with this distinguishing mark, on each inspected joist or joist girder. This mark or tag shall remain on the joist or joist girder throughout the job site receiving and erection process.

1705 A .2.4 Cold-formed steel trusses spanning 60 feet or greater. Where a cold-formed steel truss clear span is 60 feet (18 288 mm) or greater, the special inspector shall verify that the temporary installation restraint/bracing and the permanent individual truss member restraint/bracing are installed in accordance with the approved truss submittal package.

1705A.2.4.1 Light-framed steel truss inspection and testing.¶

testing. Regardless of truss span, the manufacture of cold-formed light framed steel trusses shall be contin- uously inspected by an approved agency. The approved agency shall verify conformance of materi- als and manufacture with approved plans and specifi- cations. The approved agency shall place a distinguishing mark, and/or tag with this distinguish- ing mark, on each inspected truss. This mark or tag shall remain on the truss throughout the job site receiving and erection process. Refer to Section 2211A.1.3.3 for requirements applicable to manufac- tured trusses specified therein.

1705A.2.5 Inspection and tests of structural welding.¶

Inspection and testing (including nondestructive testing) of all shop and field welding operations shall be in accor- dance with this section, Section 1705A.2.1, and Table 1705A.2.1. Inspections shall be made by a qualified weld- ing inspector approved by the enforcement agency. The minimum requirements for a qualified welding inspector

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TABLE 1705A.2.1¶

REQUIRED SPECIAL INSPECTIONS AND TESTS OF STEEL CONSTRUCTION

TYPE	CONTINUOUS SPECIAL INSPECTION	PERIODIC SPECIAL INSPECTION	REFERENCED STANDARDa	CBC REFERENCEa
1. Material identification and testing of high-strength bolts, nuts and washers:
a. Identification markings to conform to ASTM standards specified in the approved construction documents.	—	X	RCSC: 1.5, AISC 360: A3.3, J3.1 and applicable ASTM material standards	2202A.1, [DSA-SS/ CC] 2202.1
b. Manufacturer's certificate of compliance required.	—	X	RCSC: 1.5 & 2.1; AISC 360: A3.3 & N3.2	—
c. Testing of high-strength bolts, nuts and washers.	—	—	RCSC: 7.2, Applicable ASTM material standards	2213A.1, [DSA-SS/ CC] 2212.6.1
2. Inspection of high-strength bolting:
a. Snug-tight joints.	—	X	_ RCSC: 7-9,_ AISC 360: J3.1, J3.2, M2.5 & N5.6	1705A.2.6, 2204A.2, [DSA-SS/ CC] 2204.2
b. Pretensioned and slip-critical joints using turn-of-nut with matchmarking, twist-off bolt or direct tension indicator methods of installation	—	X	X	X
c. Pretensioned and slip-critical joints using turn-of-nut without matchmarking or calibrated wrench methods of installation.	_ X_	_ —_	_ —_	_ —_
3. Material identification and testing of structural steel and cold-formed steel deck:
a. For structural steel, identification markings to conform to AISC 360.	—	X	AISC 360: A3.1	2202A.1, [DSA-SS/ CC] 2202.1
b. For other steel, identification markings to conform to ASTM standards specified in the approved construction documents.	—	X	Applicable ASTM material standards	2202A.1, [DSA-SS/ CC] 2202.1
c. Manufacturer's certified test reports.	—	X	AISC 360: A3.1& N3.2	—
d. Testing of unidentified steel.	—	—	Applicable ASTM material standards	2202A.1, [DSA-SS/ CC] 2202.1
4. Material identification of welding consumables and testing of welded elements:
a. Identification markings to conform to AWS specification in the approved construction documents.	—	X	AISC 360, A3.5 & N3.2 and applicable AWS A5 documents	—
b. Manufacturer's certificate of compliance required.	—	X	AISC 360: N3.2	—
c. Nondestructive testing of welded joints.	—	—	AISC 360: N5.5
5. Inspection of welding:	5. Inspection of welding:	5. Inspection of welding:	5. Inspection of welding:	5. Inspection of welding:
a. Structural steel and cold-formed steel deck:
1. Complete and partial joint penetration groove welds	X	—	AISC 360: J2, M2.4, & M4.5, AWS D1.1 AWS D1.8	1705A.2.1, 1705A.2.5
2. Multipass fillet welds.	X	—	—	—
3. Single-pass fillet welds >5/16"	X	—	—	—
4.Plug and slot welds.	X	—	—	—
5. Single-pass fillet welds≤ 5/16"	—	X	X	X
6. Floor and roof deck welds.	—	X	AWS D1.3, SDI QA/QC	1705A.2.1, 1705A.2.2 1705A.2.5
7. End-welded studs.	—	X	AWS D1.1	1705A.2.5, 2213A.2, [DSA-SS/ CC] 2212.6.2
8. Welded sheet steel for cold-formed framing members	—	X	AWS D1.3	1705A.2.5, 1705A.2.4.1
b. Reinforcing steel:	b. Reinforcing steel:	b. Reinforcing steel:	b. Reinforcing steel:	b. Reinforcing steel:
1. Verification of weldability of reinforcing steel other than ASTM A706.	—	X	AWS D1.4, ACI 318: _18.2.8, 25.5.7.4, _ 26.6.4.1	1705A.3.1, 1903A.8
2. Reinforcing steel resisting flexural and axial forces in intermediate and special moment frames, and boundary elements of special structural walls of concrete and shear reinforcement.	X	—	—	—
3. Shear reinforcement.	X
4. Other reinforcing steel.	—	X	X	X
5. Tests of reinforcing bars.	—	—	—	1910A.2, [DSA-SS/ CC] 1909.2.4
6. Inspection of steel frame joint details for compliance:
a. Details such as bracing and stiffening.	—	X	AISC 360: N5.8	1705A.2.1
b. Member locations.	—	X	X	X
c. Application of joint details at each connection.	—	X	X	X

For SI: 1 inch = 25.4 mm.

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TABLE 1705¶

A .2.3 REQUIRED SPECIAL INSPECTIONS OF OPEN-WEB STEEL JOISTS AND JOIST GIRDERS

TYPE	CONTINUOUS SPECIAL INSPECTION	PERIODIC SPECIAL INSPECTION	REFERENCED STANDARDa
1. Installation of open-web steel joists and joist girders.
a. End connections – welding or bolted.	—	X	SJI specifications listed in Section 2207.1.
b. Bridging – horizontal or diagonal.	—	—	—
1. Standard bridging.	—	X	SJI specifications listed in Section 2207.1.
2. Bridging that differs from the SJI specifications listed in Section 2207.1.	—	X	—

For SI: 1 inch = 25.4 mm. a. Where applicable, see Section 1705 A .12, Special inspections for seismic resistance.

1705A.3.3 Batch plant inspection.¶

Except as provided under this section, the quality and quantity of materials used in transit-mixed concrete and in batched aggregates shall be continuously inspected by an approved agency at the location where materials are measured.

1705A.3.3.1 Waiver of continuous batch plant inspec- tion. Continuous batch plant inspection may be waived by the registered design professional, subject to approval by the enforcement agency under either of the following conditions:

1. The concrete plant complies fully with the requirements of ASTM C94, Sections 9 and 10, and has a current certificate from the National Ready Mixed Concrete Association or another agency acceptable to the enforcement agency. The certification shall indicate that the plant has automatic batching and recording capabili- ties.

2. For single-story light-framed construction (without basement or retaining walls higher than 6 feet in height measured from bottom of footing to top of wall) and isolated foundations supporting equipment only, where deep founda- tion elements are not used.

When continuous batch plant inspection is waived, the following requirements shall apply and shall be described in the construction documents: 1. An approved agency shall check the first batch at the start of the day to verify materials and propor- tions conform to the approved mix design.

2. A licensed weighmaster shall positively identify quan- tity of materials and certify each load by a batch ticket.

3. Batch tickets, including material quantities and weights shall accompany the load, shall be transmit- ted to the inspector of record by the truck driver with load identified thereon. The load shall not be placed without a batch ticket identifying the mix. The inspec- tor of record shall keep a daily record of placements, identifying each truck, its load, and time of receipt at the jobsite, and approximate location of deposit in the

structure and shall maintain a copy of the daily record as required by the enforcement agency.

1705A.3.3.2 Batch plant inspection not required.¶

[DSA-SS, DSA-SS/CC] Batch plant inspection is not required for any of the following conditions, provided they are identified on the approved construction docu- ments and the licensed weighmaster and batch ticket requirements of Section 1705A.3.3.1 are imple- mented:

1. Site flatwork

2. Unenclosed site structures, including but not lim- ited to lunch or car shelters, bleachers, solar structures, flag or light poles, or retaining walls.

3. Controlled low-strength material backfill.

4. Single-story relocatable buildings less than 2,160 square feet.

1705A.3.4 Inspection and testing of prestressed concrete.¶

Inspections and tests for prestressed concrete work shall be in accordance with this section. Tests for prestressing steel and anchorage shall be per Section 1910A.3 ( [DSA- SS/CC] 1909.2.5). Inspection shall be in accordance with the following:

1. In addition to the general inspection required for concrete work, all plant fabrication of prestressed concrete members or tensioning of posttensioned members constructed at the site shall be continu- ously inspected by an inspector specially approved for this purpose by the enforcement agency.

Exception: The special inspector need not be continuously present for the placement of pre- stressing or post-tensioned cables or tendons.

[DSA-SS, DSA-SS/CC] Special inspector approval by the enforcement agency shall occur when specified in the California Administrative Code.

2. The prestressed concrete plant fabrication inspector shall check the materials, equipment, tensioning procedure and construction of the prestressed mem- bers and prepare daily written reports. The

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approved agency shall make a verified report identi- fying the members by mark and shall include such pertinent data as lot numbers of tendons used, ten- don jacking forces, age and strength of concrete at time of tendon release and such other information that may be required.

3. The inspector of prestressed members post-ten- sioned at the site shall check the condition of the prestressing tendons, anchorage assemblies and concrete in the area of the anchorage, the tension- ing equipment and the tensioning procedure and

prepare daily written reports. The approved agency shall make a verified report of the pre- stressing operation identifying the members or ten- dons by mark and including such pertinent data as the initial cable slack, net elongation of tendons, jacking force developed, and such other informa- tion as may be required.

4. The verified reports of construction shall show that of the inspector's own personal knowledge, the work covered by the report has been performed and mate- rials used and installed in every material respect in

TABLE 1705 A .3 REQUIRED SPECIAL INSPECTIONS AND TESTS OF CONCRETE CONSTRUCTION

TYPE	CONTINUOUS SPECIAL INSPECTION	PERIODIC SPECIAL INSPECTION	REFERENCED STANDARDa	CBC REFERENCE
1. Inspect_and test_reinforcement, including prestress- ing tendons, and verify placement.	—	X	ACI 318: Ch. 20, 25.2, 25.3, 26.6.1-26.6.3	_1908A.3,1908_A.4, 1910A.2, 1910A.3; [DSA-SS/CC] 1909.2.4, 1909.2.5
2. Reinforcing bar welding: a. Verify weldability of reinforcing bars other than ASTM A706; b. Inspect single-pass fillet welds, maximum5/16″; and c. Inspect all other welds.	— X	X X	AWS D1.4 ACI 318: 26.6.4	1705A.3.1, 1903A.8
3. Inspect anchors cast in concrete.	—	X	ACI 318: 17.8.2,26.7.2, 26.8.2	—
4. Inspect_and test_anchors post-installed in hardened concrete members.b, c a. Adhesive anchors installed in horizontally or upwardly inclined orientations to resist sustained tension loads. b. Mechanical anchors and adhesive anchors not defined in 4.a.	X	X	ACI 318: 17.8.2.4 ACI 318: 17.8.2	1705A.3.8, 1910A.5, [DSA-SS/CC] 1909.2.7 1705A.3.8, 1910A.5, [DSA-SS/CC] 1909.2.7
5. Verify use of required design mix.	—	X	ACI 318: Ch. 19,26.4	1903A.5, 1903A.6, 1903A.7, 1904_A.1,1904_A.2,1908_A.2, 1908_A.3, 1910A.1, [DSA-SS/CC] 1909.2.1, 1909.2.2, 1909.2.3
6. Prior to_and during_ concrete placement, fabricate specimens for strength tests, perform slump and air content tests, and determine the temperature of the concrete.	X	—	ASTM C172 ASTM C31 ACI 318: 26.4, 26.12	1705A.3.5, 1705A.3.6, _1905A.1.16,_1908_A.5, _ 1908A.10, [DSA-SS/CC] 1908.5, 1909.3.7, 1908.10, 1909.4.1
7. Inspect concrete and shotcrete placement for proper application techniques.	X	—	ACI 318: 26.5, ACI 506: 3.4	1908A.5, 1908_A_.6, 1908_A.7, 1908_A.8, 1908A.10, 1908A.12, [DSA-SS/CC] 1909.4.5
8. Verify maintenance of specified curing temperature and techniques.	—	X	ACI 318: 26.5.3-26.5.5	1908_A_.9
9. Inspect prestressed concrete for: a. Application of prestressing forces; and b. Grouting of bonded prestressing tendons.	X X	— —	ACI 318: 26.10_.2_	1705A.3.4
10. Inspect erection of precast concrete members.	—	X	ACI 318: 26.9.2	—
11. 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 struc- tural slabs.	—	X	ACI 318:_26.10.2,_26.11.2	1911A.1, [DSA-SS/CC] 1909.5,
12. Inspect formwork for shape, location and dimen- sions of the concrete member being formed.	—	X	ACI 318: 26.11.1.2(b)	1908A.11, [DSA-SS/CC] 1909.4.4

For SI: 1 inch = 25.4 mm. a. Where applicable, see Section 1705 A .12, Special inspections for seismic resistance. b. 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 building official prior to the commencement of the work. c. Installation of all adhesive anchors in horizontal and upwardly inclined positions shall be performed by an ACI/CRSI Certified Adhesive Anchor Installer,

except where the design tension on the anchors is less than 100 pounds and those anchors are clearly noted on the approved construction documents or where the anchors are shear dowels across cold joints in slabs on grade where the slab is not part of the lateral force-resisting system.

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struction documents. Additionally, the special inspector must verify the nominal size of framing members at adjoining panel edges, the nail or staple diameter and length, the number of fastener lines and that the spacing between fasteners in each line and at edge margins agrees with the approved construction documents.

1705 A .5.2 Metal-plate-connected wood trusses. Special inspections of wood trusses with overall heights of 60 inches (1524 mm) or greater shall be performed to verify that the installation of the permanent individual truss member restraint/bracing has been installed in accordance with the approved truss submittal package. For wood trusses with a clear span of 60 feet (18 288 mm) or greater, the special inspector shall verify during construction that the temporary installation restraint/bracing is installed in accordance with the approved truss submittal package.

1705A.5.3 Wood structural elements and assemblies.¶

Special inspection of wood structural elements and assem- blies is required, as specified in this section, to ensure conformance with approved construction documents, and applicable standards.

The approved agency shall furnish a verified report to the design professional in general responsible charge of construction observation, the structural engineer, and the enforcement agency, in accordance with the California Administrative Code and this chapter. The verified report shall list all inspected members or trusses, and shall indi- cate whether or not the inspected members or trusses con- form with applicable standards and the approved drawings and specifications. Any nonconforming items shall be indicated on the verified report.

1705A.5.4 Structural glued laminated timber.¶

Manufac- ture of all structural glued laminated timber shall be con- tinuously inspected by an approved agency.

The approved agency shall verify that proper quality control procedures and tests have been employed for all materials and the manufacturing process, and shall per- form visual inspection of the finished product. Each inspected member shall be stamped by the approved agency with an identification mark.

Exception: Special Inspection is not required for non- custom members of 5 ¹ /8-inch maximum width and 18- inch maximum depth, and with a maximum clear span of 32 feet, manufactured and marked in accordance with ANSI/APA A 190.1 Section 13.1 for noncustom members.

1705A.5.5 Manufactured open web trusses.¶

The manu- facture of open web trusses shall be continuously inspected by an approved agency.

The approved agency shall verify that proper quality control procedures and tests have been employed for all materials and the manufacturing process, and shall per- form visual inspection of the finished product. Each inspected truss shall be stamped with an identification mark by the approved agency.

1705A.5.6 Timber connectors. The installation of all split ring and shear plate timber connectors, and timber rivets

compliance with the duly approved plans and speci- fications for plant fabrication inspection. The veri- fied report shall be accompanied by test reports required for materials used. For site post-tensioning inspections the verified report shall be accompanied by copies of calibration charts, certified by an approved testing laboratory, showing the relation- ship between gage readings and force applied by the jacks used in the prestressing procedure.

1705A.3.5 Concrete preplacement inspection.¶

Concrete shall not be placed until the forms and reinforcement have been inspected, all preparations for the placement have been completed, and the preparations have been checked by the inspector of record.

1705A.3.6 Placing record. A record shall be kept on the site of the time and date of placing the concrete in each portion of the structure. Such record shall be kept until the completion of the structure and shall be open to the inspection of the enforcement agency.

1705A.3.7 Composite construction cores¶

. Composite con- struction cores shall be taken and tested in accordance with Section 1910A.4 ( [DSA-SS/CC] 1909.2.6).

1705A.3.8 Special Inspections and tests for post-installed anchors in concrete . Special inspections and tests for post-installed anchors in concrete shall be in accordance with Table 1705A.3 and Section 1910A.5 ( [DSA-SS/CC] 1909.2.7).

1705 A .4 Masonry construction. Special inspections and tests of masonry construction shall be performed in accordance with the quality assurance program requirements of TMS 402 and TMS 602 , as set forth in Tables 3 and 4, Level 3 requirements and Chapter 21A. Testing shall be performed in accordance with Section 2105A ([DSA-SS/CC] 2115.8). Special inspection and testing of post-installed anchors in masonry shall be required in accordance with requirements for concrete in Chapters 17A and 19A.

1705 A .4.1 Glass unit masonry and masonry veneer in Risk Category II, III or IV. Special inspections and tests for glass unit masonry or masonry veneer designed in accordance with Section 2110 A or Chapter 14, respectively, where they are part of a structure classified as Risk Category II, III or IV shall be performed in accordance with TMS 602 Tables 3 and 4, Level 2 Quality Assurance.

1705 A .4.2 Vertical masonry foundation elements. Special inspections and tests of vertical masonry foundation elements shall be performed in accordance with Section 1705 A .4.

1705 A .5 Wood construction. Special inspections of prefabricated wood structural elements and assemblies shall be in accordance with Section 1704 A .2.5 except as modified in this section . Special inspections of site-built assemblies shall be in accordance with this section.

1705 A .5.1 High-load diaphragms. High-load diaphragms designed in accordance with Section 2306 A .2 shall be installed with special inspections as indicated in Section 1704 A .2. The special inspector shall inspect the wood structural panel sheathing to ascertain whether it is of the grade and thickness shown on the approved con

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shall be continuously inspected by an approved agency. The approved agency shall furnish the architect, struc- tural engineer and the enforcement agency with a report verifying that the materials, timber connectors and work- manship conform to the approved construction documents.

1705 A .6 Soils. Special inspections and tests of existing site soil conditions, fill placement and load-bearing requirements shall be performed in accordance with this section and Table 1705 A .6. The approved geotechnical report and the construction documents prepared by the registered design professionals shall be used to determine compliance. During fill placement, the special inspector shall verify that proper materials and procedures are used in accordance with the provisions of the approved geotechnical report.

Exception: Where Section 1803 A does not require reporting of materials and procedures for fill placement, the special inspector shall verify that the in-place dry density of the compacted fill is not less than 90 percent of the maximum dry density at optimum moisture content determined in accordance with ASTM D1557.

1705A.6.1 Soil fill.¶

All fills used to support the founda- tions of any building or structure shall be continuously inspected by the geotechnical engineer or his or her quali- fied representative. It shall be the responsibility of the geotechnical engineer to verify that fills meet the require- ments of the approved construction documents and to coordinate all fill inspection and testing during the con- struction involving such fills.

The duties of the geotechnical engineer or his or her qualified representative shall include, but need not be lim- ited to, the inspection of cleared areas and benches pre- pared to receive fill; inspection of the removal of all unsuitable soils and other materials; the approval of soils to be used as fill material; the inspection of placement and compaction of fill materials; the testing of the completed fills; the inspection or review of geotechnical drainage devices, buttress fills or other similar protective measures in accordance with the approved construction documents.

A verified report shall be submitted by the geotechnical engineer as required by the California Administrative Code. The report shall indicate that all tests and inspec- tion required by the approved construction documents were completed and that the tested materials and/or

inspected work meet the requirements of the approved construction documents.

1705A.6.2 Earth-retaining shoring.¶

Special inspections and tests of earth-retaining shoring shall be in accordance with applicable portions of Section 1812A

1705A.6.3 Vibro stone columns. Special inspections and tests of vibro stone columns for ground improvement shall be in accordance with applicable portions of Section 1813A.

1705 A .7 Driven deep foundations. Special inspection s and tests shall be performed during installation of driven deep foundation elements as specified in 1810A.3.3.1.2 and Table 1705 A .7. The approved geotechnical report and the construction documents prepared by the registered design professionals shall be used to determine compliance.

1705A.7.1 Driven deep foundations observation.¶

The installation of driven deep foundations shall be continu- ously observed by a qualified representative of the geo- technical engineer responsible for that portion of the project.

The representative of the geotechnical engineer shall make a report of the deep foundation pile-driving opera- tion giving such pertinent data as the physical characteris- tics of the deep foundation pile-driving equipment, identifying marks for each deep foundation pile, the total depth of embedment for each deep foundation; and when the allowable deep foundation pile loads are determined by a dynamic load formula, the design formula used, and the permanent penetration under the last 10 blows. One copy of the report shall be sent to the enforcement agency.

1705 A .8 Cast-in-place deep foundations. Special inspections and tests shall be performed during installation of castin-place deep foundation elements as specified in 1810A.3.3.1.2 and Table 1705 A .8. The approved geotechnical report and the construction documents prepared by the registered design professionals shall be used to determine compliance.

1705 A .9 Helical pile foundations. Continuous special inspections shall be performed during installation of helical pile foundations. The information recorded shall include installation equipment used, pile dimensions, tip elevations, final depth, final installation torque and other pertinent instal

TABLE 1705 A .6 REQUIRED SPECIAL INSPECTIONS AND TESTS OF SOILS

TYPE	CONTINUOUS SPECIAL INSPECTION	PERIODIC SPECIAL INSPECTION
1. Verify materials below shallow foundations are adequate to achieve the design bearing capacity.	—	X
2. Verify excavations are extended to proper depth and have reached proper material.	—	X
3. Perform classification and testing of compacted fill materials.	—	X
4. Verify use of proper materials, densities and lift thicknesses during placement and com- paction of compacted fill.	X	—
5. Prior to placement of compacted fill, inspect subgrade and verify that site has been pre- pared properly.	—	X

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bolting, anchoring and other fastening of elements of the main windforce-resisting system, including shear walls, braces, diaphragms, collectors (drag struts) and hold-downs.

1705 A .11.3 Wind-resisting components. Periodic special inspection is required for fastening of the following systems and components:

Roof covering, roof deck and roof framing connections.
Exterior wall covering and wall connections to roof and floor diaphragms and framing.

1705 A .12 Special inspections for seismic resistance. Special inspections for seismic resistance shall be required as specified in Sections 1705 A .12.1 through 1705 A .12.9, unless exempted by the exceptions of Section 1704 A .2.

1705 A .12.1 Structural steel. Special inspections for seismic resistance shall be in accordance with Section 1705 A .12.1.1 or 1705 A .12.1.2, as applicable.

1705 A .12.1.1 Seismic force-resisting systems. Special inspections of structural steel in the seismic forceresisting systems in buildings and structures assigned to Seismic Design Category D, E or F shall be performed in accordance with the quality assurance requirements of AISC 341 as modified by Section 1705A.2.1 of this code .

1705 A .12.1.2 Structural steel elements. Special inspections of structural steel elements in the seismic force-resisting systems of buildings and structures

lation data as required by the registered design professional in responsible charge. The approved geotechnical report and the construction documents prepared by the registered design professional shall be used to determine compliance.

1705 A .10 Fabricated items. Special inspections of fabricated items shall be performed in accordance with Section 1704 A .2.5.

1705 A .11 Special inspections for wind resistance. Special inspections for wind resistance specified in Sections 1705 A .11.1 through 1705 A .11.3, unless exempted by the exceptions to Section 1704 A .2, are required for buildings and structures constructed in the following areas:

In wind Exposure Category B, where Vasd as determined in accordance with Section 1609 A .3.1 is 120 miles per hour (52.8 m/sec) or greater.
In wind Exposure Category C or D, where Vasd as determined in accordance with Section 1609 A .3.1 is 110 mph (49 m/sec) or greater.

1705 A .11.1 Structural wood. Continuous special inspection is required during field gluing operations of elements of the main windforce-resisting system. Periodic special inspection is required for nailing, bolting, anchoring and other fastening of elements of the main windforce-resisting system, including wood shear walls, wood diaphragms, drag struts, braces and hold-downs.

1705 A .11.2 Cold-formed steel light-frame construction. Periodic special inspection is required for welding operations of elements of the main windforce-resisting system. Periodic special inspection is required for screw attachment,

TABLE 1705 A .7 REQUIRED SPECIAL INSPECTIONS AND TESTS OF DRIVEN DEEP FOUNDATION ELEMENTS

TYPE	CONTINUOUS SPECIAL INSPECTION	PERIODIC SPECIAL INSPECTION
1. Verify element materials, sizes and lengths comply with the requirements.	X	—
2. Determine capacities of test elements and conduct additional load tests, as required.	X	—
3. Inspect driving operations and maintain complete and accurate records for each element.	X	—
4. Verify placement locations and plumbness, confirm type and size of hammer, record number of blows per foot of penetration, determine required penetrations to achieve design capacity, record tip and butt elevations and document any damage to foundation element.	X	—
5. For steel elements, perform additional special inspections in accordance with Section 1705.2.	—	—
6. For concrete elements and concrete-filled elements, perform tests and additional special inspections in accordance with Section 1705.3.	—	—
7. For specialty elements, perform additional inspections as determined by the registered design professional in responsible charge.	—	—

TABLE 1705 A .8 REQUIRED SPECIAL INSPECTIONS AND TESTS OF CAST-IN-PLACE DEEP FOUNDATION ELEMENTS

TYPE	CONTINUOUS SPECIAL INSPECTION	PERIODIC SPECIAL INSPECTION
1. Inspect drilling operations and maintain complete and accurate records for each element.	X	—
2. Verify placement locations and plumbness, confirm element diameters, bell diameters (if applicable), lengths, embedment into bedrock (if applicable) and adequate end-bearing strata capacity. Record concrete or grout volumes.	X	—
3. For concrete elements, perform tests and additional special inspections in accordance with Section 1705.3.	—	—

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assigned to Seismic Design Category D, E or F other than those covered in Section 1705 A .12.1.1, including struts, collectors, chords and foundation elements, shall be performed in accordance with the quality assurance requirements of AISC 341 as modified by Section

1705A.2.1 of this code¶

1705 A .12.2 Structural wood. For the seismic forceresisting systems of structures assigned to Seismic Design Category D, E or F:

Continuous special inspection shall be required during field gluing operations of elements of the seismic force-resisting system.
Periodic special inspection shall be required for nailing, bolting, anchoring and other fastening of elements of the seismic force-resisting system, including wood shear walls, wood diaphragms, drag struts, braces, shear panels and hold-downs.

1705 A .12.3 Cold-formed steel light-frame construction. For the seismic force-resisting systems of structures assigned to Seismic Design Category D, E or F, periodic special inspection shall be required for both:

Welding operations of elements of the seismic force-resisting system.
Screw attachment, bolting, anchoring and other fastening of elements of the seismic force-resisting system, including shear walls, braces, diaphragms, collectors (drag struts) and hold-downs.

1705 A .12.4 Special inspection for special seismic certi- fication . For structures assigned to S eismic Design Category D, E or F, the special inspector shall examine equipment and components requiring special seismic certification in accordance with Section 1705A.13.3 or ASCE 7, Section 13.2.2 and verify that the label, anchorage and mounting conform to the certificate of compliance.

1705 A .12.5 Architectural components. Periodic special inspection is required for the erection and fastening of exterior cladding, interior and exterior nonbearing walls, ceilings and interior and exterior veneer in structures assigned to Seismic Design Category D, E or F.

1705 A .12.5.1 Access floors. Periodic special inspection is required for the anchorage of access floors in structures assigned to Seismic Design Category D, E or F.

1705 A .12.6 Plumbing, mechanical and electrical com- ponents. Periodic special inspection of plumbing, mechanical and electrical components shall be required for the following:

Anchorage of electrical equipment for emergency and standby power systems in structures assigned to Seismic Design Category D, E or F.
Anchorage of other electrical equipment in structures assigned to Seismic Design Category D, E or F.
Installation and anchorage of piping systems designed to carry hazardous materials and their

associated mechanical units in structures assigned to Seismic Design Category D, E or F.

Installation and anchorage of ductwork designed to carry hazardous materials in structures assigned to Seismic Design Category D, E or F.
Installation and anchorage of vibration isolation systems in structures assigned to Seismic Design Category D, E or F where the approved construction documents require a nominal clearance of ¹ /4 inch (6.4 mm) or less between the equipment support frame and restraint.
Installation of mechanical and electrical equipment, including duct work, piping systems and their structural supports, where automatic fire sprinkler systems are installed in structures assigned to Seismic Design Category D, E or F to verify one of the following:

6.1. Minimum clearances have been provided as required by Section 13.2.3 ASCE/SEI 7.

6.2. A nominal clearance of not less than 3 inches (76 mm) has been provided between fire protection sprinkler system drops and sprigs and: structural members not used collectively or independently to support the sprinklers; equipment attached to the building structure; and other systems’ piping.

Where flexible sprinkler hose fittings are used, special inspection of minimum clearances is not required.

1705 A .12.7 Storage racks. Periodic special inspection is required for the anchorage of storage racks that are 8 feet (2438 mm) or greater in height in structures assigned to Seismic Design Category D, E or F.

1705 A .12.8 Seismic isolation and damping systems. Periodic special inspection shall be provided for seismic isolation and damping systems in structures assigned to Seismic Design Category D, E or F during the fabrication and installation of isolator units and energy dissipation devices. Continuous special inspection is required for pro- totype and production testing of isolator units and damp- ing devices.

1705 A .13 Testing for seismic resistance. Testing for seismic resistance shall be required as specified in Sections 1705 A .13.1 through 1705 A .13.4, unless exempted from special inspections by the exception of Section 1704 A .2.

1705 A .13.1 Structural steel. Nondestructive testing for seismic resistance shall be in accordance with Section 1705 A .13.1.1 or 1705 A .13.1.2, as applicable.

1705 A .13.1.1 Seismic force-resisting systems. Nondestructive testing of structural steel in the seismic forceresisting systems in buildings and structures assigned to Seismic Design Category D, E or F shall be performed in accordance with the quality assurance requirements of AISC 341.

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3. Components with hazardous contents.

4. Exhaust and smoke control fans.

5. Switchgear and switchboards.

6. Motor control centers.

7. Fluoroscopy and x-ray equipment required for radiological/diagnostic imaging service (for ser- vice requirements see CBC Section 1224.18.1), and any fluoroscopy and/or radiographic system provided in support of diagnostic assessment of trauma injuries.

8. CT (Computerized Tomography) systems used for diagnostic assessment of trauma injuries.

Exception: CT equipment used for treatment or in hybrid operating rooms, including those used for interventional CT, unless used for diagnostic assessment of trauma injuries.

9. Air conditioning units excluding Variable/Con- stant Air Volume (VAV/CAV) boxes up to 75 lbs.

10. Air handling units.

11. Chillers, including associated evaporators, and condensers.

12. Cooling towers.

13. Transformers.

14. Electrical substations.

15. UPS and batteries.

16. Panelboards as defined in the California Elec- trical Code (CEC) Article 100.

17. Industrial control panels as defined in the Cali- fornia Electrical Code (CEC) Article 100.

18. Power isolation and correction systems.

19. Motorized surgical lighting systems.

20. Motorized operating table systems.

21. Internal communication servers and routers.

22. Medical gas and vacuum systems.

23. Electrical busways as defined in UL 857.

24. Electrical control panels powered by the life safety branch in accordance with the California Electrical Code (CEC) Article 517.32 or the critical branch in accordance with the Califor- nia Electrical Code (CEC) Article 517.33.

Exceptions:

1. Equipment and components weighing not more than 50 lbs. supported directly on structures or surface mounted on equipment or components that are not required to have special seismic certification by this section.

2. Mobile equipment/components.

3. Pipes, ducts, conduits and cable trays, excluding in-line equipment and components.

1705 A .13.1.2 Structural steel elements. Nondestructive testing of structural steel elements in the seismic force-resisting systems of buildings and structures assigned to Seismic Design Category D, E or F other than those covered in Section 1705 A .13.1.1, including struts, collectors, chords and foundation elements, shall be performed in accordance with the quality assurance requirements of AISC 341.

1705 A .13.2 Nonstructural components. For structures assigned to Seismic Design Category D, E or F, where the requirements of Section 13.2.1 of ASCE 7 for nonstructural components, supports or attachments are met by manufacturer’s certification as specified in Item 2 therein, the registered design professional shall specify on the approved construction documents the requirements for seismic certification by analysis or testing. Certificates of compliance for the manufacturer’s certification shall be submitted to the building official as specified in Section 1704.5.

Seismic sway bracing components satisfying require- ments of FM 1950 or using an alternative testing protocol approved by the building official shall be deemed to sat- isfy the requirements of this section.

1705 A .13.3 Special seismic certification . For structures assigned to Seismic Design Category D, E or F, equipment and components that are subject to the requirements of Section 13.2.2 of ASCE 7 for special seismic certification, the registered design professional shall specify on the approved construction documents the requirements to be met by analysis or testing as specified therein. Certificates of compliance documenting that the requirements are met shall be submitted to the building official as specified in Section 1704.5.

Active or energized equipment and components shall be certified exclusively on the basis of approved shake table testing in accordance with ICC-ES AC 156 or equivalent shake table testing criteria approved by the building offi- cial. Minimum of two equipment/components shall be tested for a product line with similar structural configura- tion. Where a range of products are tested, the two equip- ment/components shall be either the largest and a small unit, or approved alternative representative equipment/ components.

Exception: When a single product (and not a product line with more than one product with variations) is cer- tified and manufacturing process is ISO 9001 certified, one test shall be permitted.

For a multi-component system, where active or ener- gized components are certified by tests, connecting ele- ments, attachments, and supports can be justified by supporting analysis.

1705A.13.3.1 [OSHPD 1 & 4]¶

Special seismic certifi- cation shall be required for the following systems, equipment, and components:

1. Emergency and standby power systems.

2. Elevator equipment (excluding elevator cabs).

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4. Underground tanks.

5. Electric motors, base-mounted horizontal pumps, and compressors.

6. Based-mounted vertical pumps up to 20 hp.

7. Certified subcomponents up to operating weight of 10 lbs.

8. Components where importance factor, Ip, is permitted to be 1.0 by this code.

9. Emergency generators up to 25 kilowatts.

10. Equipment and components used for clini- cal trials only.

11. Elevator machines and governors.

For Exceptions 5, 6, and 7:

Exempt subcomponents, which are an integral part of equipment that require special seismic certifica- tion, shall be tested attached to the equipment. Exempt subcomponents shall be permitted to be sub- stituted without testing, provided that the substituted subcomponent relative to the certified subcompo- nent has:

1. Similar configuration with equivalent func- tion.

2. Supports and attachments of similar configu- ration with equivalent strength and stiffness.

3. Same attachment location.

4. Changes in dimensions, center of gravity, and mass, of not more than 10 percent of the certi- fied subcomponent and still meets Exception 5, 6, or 7.

5. Manufacturing process with ISO 9001 certifi- cation.

1705 A .13.4 Seismic isolation and damping systems. Seismic isolation and damping systems in structures assigned to Seismic Design Category D, E or F shall be tested in accordance with Sections 17.8 and 18.6 of ASCE 7.

Prototype and production testing and associated acceptance criteria for isolator units and damping devices shall be subject to preapproval by the building official. Testing exemption for similar units shall require approval by the building official.

[BF] 1705 A .14 Sprayed fire-resistant materials. Special inspections and tests of sprayed fire-resistant materials applied to floor, roof and wall assemblies and structural members shall be performed in accordance with Sections 1705 A .14.1 through 1705 A .14.6. Special inspections shall be based on the fire-resistance design as designated in the approved construction documents. The tests set forth in this section shall be based on samplings from specific floor, roof and wall assemblies and structural members. Special inspections and tests shall be performed after the rough installation of electrical, automatic sprinkler, mechanical and plumbing systems and suspension systems for ceilings, where applicable.

[BF] 1705 A .14.1 Physical and visual tests. The special inspections and tests shall include the following to demonstrate compliance with the listing and the fire-resistance rating:

Condition of substrates.
Thickness of application.
Density in pounds per cubic foot (kg/m ³ ).
Bond strength adhesion/cohesion.
Condition of finished application.

[BF] 1705 A .14.2 Structural member surface condi- tions. The surfaces shall be prepared in accordance with the approved fire-resistance design and the written instructions of approved manufacturers. The prepared surface of structural members to be sprayed shall be inspected by the special inspector before the application of the sprayed fireresistant material.

[BF] 1705 A .14.3 Application. The substrate shall have a minimum ambient temperature before and after application as specified in the written instructions of approved manufacturers. The area for application shall be ventilated during and after application as required by the written instructions of approved manufacturers.

[BF] 1705 A .14.4 Thickness. Not more than 10 percent of the thickness measurements of the sprayed fire-resistant materials applied to floor, roof and wall assemblies and structural members shall be less than the thickness required by the approved fire-resistance design, and none shall be less than the minimum allowable thickness required by Section 1705 A .14.4.1.

[BF] 1705 A .14.4.1 Minimum allowable thickness. For design thicknesses 1 inch (25 mm) or greater, the minimum allowable individual thickness shall be the design thickness minus ¹ /4 inch (6.4 mm). For design thicknesses less than 1 inch (25 mm), the minimum allowable individual thickness shall be the design thickness minus 25 percent. Thickness shall be determined in accordance with ASTM E605. Samples of the sprayed fire-resistant materials shall be selected in accordance with Sections 1705 A .14.4.2 and 1705 A .14.4.3.

[BF] 1705 A .14.4.2 Floor, roof and wall assemblies. The thickness of the sprayed fire-resistant material applied to floor, roof and wall assemblies shall be determined in accordance with ASTM E605, making not less than four measurements for each 1,000 square feet (93 m ² ) of the sprayed area, or portion thereof, in each story.

[BF] 1705 A .14.4.3 Cellular decks. Thickness measurements shall be selected from a square area, 12 inches by 12 inches (305 mm by 305 mm) in size. Not fewer than four measurements shall be made, located symmetrically within the square area.

[BF] 1705 A .14.4.4 Fluted decks. Thickness measurements shall be selected from a square area, 12 inches by 12 inches (305 mm by 305 mm) in size. Not fewer than four measurements shall be made, located symmetri

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cally within the square area, including one each of the following: valley, crest and sides. The average of the measurements shall be reported.

[BF] 1705 A .14.4.5 Structural members. The thickness of the sprayed fire-resistant material applied to structural members shall be determined in accordance with ASTM E605. Thickness testing shall be performed on not less than 25 percent of the structural members on each floor.

[BF] 1705 A .14.4.6 Beams and girders. At beams and girders thickness measurements shall be made at nine locations around the beam or girder at each end of a 12inch (305 mm) length.

[BF] 1705 A .14.4.7 Joists and trusses. At joists and trusses, thickness measurements shall be made at seven locations around the joist or truss at each end of a 12inch (305 mm) length.

[BF] 1705 A .14.4.8 Wide-flanged columns. At wideflanged columns, thickness measurements shall be made at 12 locations around the column at each end of a 12-inch (305 mm) length.

[BF] 1705 A .14.4.9 Hollow structural section and pipe columns. At hollow structural section and pipe columns, thickness measurements shall be made at not fewer than four locations around the column at each end of a 12-inch (305 mm) length.

[BF] 1705 A .14.5 Density. The density of the sprayed fireresistant material shall be not less than the density specified in the approved fire-resistance design. Density of the sprayed fire-resistant material shall be determined in accordance with ASTM E605. The test samples for determining the density of the sprayed fire-resistant materials shall be selected as follows:

From each floor, roof and wall assembly at the rate of not less than one sample for every 2,500 square feet (232 m ² ) or portion thereof of the sprayed area in each story.
From beams, girders, trusses and columns at the rate of not less than one sample for each type of structural member for each 2,500 square feet (232 m ² ) of floor area or portion thereof in each story.

[BF] 1705 A .14.6 Bond strength. The cohesive/adhesive bond strength of the cured sprayed fire-resistant material applied to floor, roof and wall assemblies and structural members shall be not less than 150 pounds per square foot (psf) (7.18 kN/m ² ). The cohesive/adhesive bond strength shall be determined in accordance with the field test specified in ASTM E736 by testing in-place samples of the sprayed fire-resistant material selected in accordance with Sections 1705 A .14.6.1 through 1705 A .14.6.3.

[BF] 1705 A .14.6.1 Floor, roof and wall assemblies. The test samples for determining the cohesive/adhesive bond strength of the sprayed fire-resistant materials shall be selected from each floor, roof and wall assembly at the rate of not less than one sample for every

SPECIAL INSPECTIONS AND TESTS

2,500 square feet (232 m ² ) of the sprayed area, or portion thereof, in each story.

[BF] 1705 A .14.6.2 Structural members. The test samples for determining the cohesive/adhesive bond strength of the sprayed fire-resistant materials shall be selected from beams, girders, trusses, columns and other structural members at the rate of not less than one sample for each type of structural member for each 2,500 square feet (232 m ² ) of floor area or portion thereof in each story.

[BF] 1705 A .14.6.3 Primer, paint and encapsulant bond tests. Bond tests to qualify a primer, paint or encapsulant shall be conducted where the sprayed fireresistant material is applied to a primed, painted or encapsulated surface for which acceptable bondstrength performance between these coatings and the fire-resistant material has not been determined. A bonding agent approved by the SFRM manufacturer shall be applied to a primed, painted or encapsulated surface where the bond strengths are found to be less than required values.

[BF] 1705 A .15 Mastic and intumescent fire-resistant coat- ings. Special inspections and tests for mastic and intumescent fire-resistant coatings applied to structural elements and decks shall be performed in accordance with AWCI 12-B. Special inspections and tests shall be based on the fire-resistance design as designated in the approved construction documents.

1705 A .16 Exterior insulation and finish systems (EIFS). Special inspections shall be required for all EIFS applications.

Exceptions:

Special inspections shall not be required for EIFS applications installed over a water-resistive barrier with a means of draining moisture to the exterior.
Special inspections shall not be required for EIFS applications installed over masonry or concrete walls.

1705 A .16.1 Water-resistive barrier coating. A waterresistive barrier coating complying with ASTM E2570 requires special inspection of the water-resistive barrier coating where installed over a sheathing substrate.

[BF] 1705 A .17 Fire-resistant penetrations and joints. In high-rise buildings or in buildings assigned to Risk Category III or IV, special inspections for through-penetrations, membrane penetration firestops, fire-resistant joint systems and perimeter fire barrier systems that are tested and listed in accordance with Sections 714 A .4.1.2, 714 A .5.1.2, 715 A .3 and 715 A .4 shall be in accordance with Section 1705 A .17.1 or 1705 A .17.2.

[DSA SS, DSA-SS/CC] Buildings assigned to Risk Category II, III or IV shall be subject to special inspections for fire- resistant penetrations and joints.

[BF] 1705 A .17.1 Penetration firestops. Inspections of penetration firestop systems that are tested and listed in accordance with Sections 714 A .4.1.2 and 714 A .5.1.2 shall

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be conducted by an approved agency in accordance with ASTM E2174.

[BF] 1705 A .17.2 Fire-resistant joint systems. Inspection of fire-resistant joint systems that are tested and listed in accordance with Sections 715 A .3 and 715 A .4 shall be conducted by an approved agency in accordance with ASTM E2393.

[F] 1705 A .18 Testing for smoke control. Smoke control systems shall be tested by a special inspector.

[F] 1705 A .18.1 Testing scope. The test scope shall be as follows:

During erection of ductwork and prior to concealment for the purposes of leakage testing and recording of device location.
Prior to occupancy and after sufficient completion for the purposes of pressure difference testing, flow measurements and detection and control verification.

[F] 1705 A .18.2 Qualifications. Approved agencies for smoke control testing shall have expertise in fire protection engineering, mechanical engineering and certification as air balancers.

1705A.19 Shotcrete.¶

All shotcrete work shall be continuously inspected during placing by an approved agency. The special shotcrete inspector shall check the materials, placing equip- ment, details of construction and construction procedure. The approved agency shall furnish a verified report that of his or her own personal knowledge the work covered by the report has been performed and materials used and installed in every material respect in compliance with the duly approved plans and specifications.

[DSA-SS, DSA-SS/CC] Testing requirements per ACI 506.2 shall also apply.

1705A.19.1 Visual examination for structural soundness of in-place shotcrete. Completed shotcrete work shall be checked visually for reinforcing bar embedment, voids, rock pockets, sand streaks and similar deficiencies by examining a minimum of three 3-inch (76 mm) cores taken from three areas chosen by the design engineer which rep- resent the worst congestion of reinforcing bars occurring in the project. Extra reinforcing bars may be added to noncongested areas and cores may be taken from these areas. The cores shall be examined by the special inspec- tor and a report submitted to the enforcement agency prior to final approval of the shotcrete.

Exception: Shotcrete work fully supported on earth, minor repairs, and when, in the opinion of the enforce- ment agency, no special hazard exists.