Section 2105A

QUALITY ASSURANCE

2105 A .1 General. A quality assurance program shall be used to ensure that the constructed masonry is in compliance with the approved construction documents.

The quality assurance program shall comply with the inspection and testing requirements of Chapter 17 A, TMS 602 and Sections 2105A.2 through 2105A.4.

f ′ m . The specified compres- sive strength, f ′ m, assumed in design shall be 2,000 psi (13.79 MPa) for all masonry construction using materials and details of construction required herein. Testing of the con- structed masonry shall be provided in accordance with Sec- tion 2105A.5 or 2105A.6.

Exception: Subject to the approval of the enforcement agency, higher values of f ′ m may be used in the design of reinforced grouted masonry and reinforced hollow-unit masonry. The approval shall be based on prism test results submitted by the architect or engineer which demonstrate the ability of the proposed construction to meet prescribed performance criteria for strength and stiffness. The design shall take into account the mortar joint depth. In no case shall the f ′ m assumed in design exceed 3,000 psi (20.7 MPa).

Where an f ′ m greater than 2,000 psi (13.79 MPa) is approved, the architect or structural engineer shall estab- lish a method of quality control of the masonry construc- tion acceptable to the enforcement agency which shall be described in the contract specifications. Compliance with the requirements for the specified strength of constructed masonry shall be provided using prism test method in accordance with Section 2105A.5. Substantiation for the

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100735044

MASONRY

3. Sampled in such a manner as to exclude any masonry unit webs, mortar joint, or reinforcing steel. If all cells contain reinforcement, alternate core locations or means to detect void or delami- nation shall be selected by the registered design professional and approved by the building official.

Visual examination of all cores shall be made by an approved agency and the condition of the cores reported as required by the California Administrative Code. Shear test both joints between the grout core and the outside wythes or face shell of the masonry 28 days after grouting of the sample area using a shear test apparatus acceptable to the enforce- ment agency. Core samples shall not be soaked before test- ing. Core samples to be tested shall be stored in sealed plastic bags or non-absorbent containers immediately after coring and for at least 5 days prior to testing. The average unit shear value for each pair of cores (4 shear tests) from each 5,000 square feet of wall area (or less) on the cross sec- tion of core shall not be less than 2.5 √ f ′ m psi.

l not be soaked before test-_ ing. Core samples to be tested shall be stored in sealed plastic bags or non-absorbent containers immediately after coring and for at least 5 days prior to testing. The average unit shear value for each pair of cores (4 shear tests) from each 5,000 square feet of wall area (or less) on the cross sec- tion of core shall not be less than 2.5 √ f ′ m psi.

All cores shall be submitted to an approved agency for examination, even where the core specimens failed during the cutting operation. The approved agency shall report the loca- tion where each core was taken, the findings of their visual examination of each core, identify which cores were selected for shear testing, and the results of the shear tests.

Exceptions:

1. Core sampling and testing is not required for non- bearing nonshear masonry walls, not exceeding a total wall height of 12 feet above top of foundation, built with single-wythe hollow unit concrete masonry that attaches opposite face shells using webs cast as single unit, when designed using an f ′ m not exceeding 2,000 psi (13.79 MPa).

2. An infrared thermographic survey or other nonde- structive test procedures, shall be permitted to be approved as an alternative system to detect voids or delamination in grouted masonry in-lieu of core sampling and testing. [OSHPD 1 & 4] Infrared ther- mographic surveys or other nondestructive test pro- cedures shall also include core tests with a minimum of two cores taken from each building for each 10,000 square feet (930 m ² ) of the wall.

Prism test method performed prior to the start or during construction shall be in accordance with TMS 602 Section 1.4 B.3. Prism test method performed on constructed walls shall be in accordance with TMS 602 Section 1.4 B.4.

Unit strength method testing shall be performed in accordance with TMS 602 Sec- tion 1.4 B.2.