3:28:28 PM.
Address: /showpage.php~file=06210500.htm.html
Title: Section 2105  •  Size: 12785

Go to Table of Contents
Go to previous section: 2104
Go to next section: 2107


SECTION 2105 - QUALITY ASSURANCE

2105.1 General. Quality assurance shall be provided to ensure that materials, construction and workmanship are in compliance with the plans and specifications, and the applicable requirements of this chapter. When required, inspection records shall be maintained and made available to the building official.

2105.2 Scope. Quality assurance shall include, but is not limited to, assurance that:

1. Masonry units, reinforcement, cement, lime, aggregate and all other materials meet the requirements of the applicable standards of quality and that they are properly stored and prepared for use.

2. Mortar and grout are properly mixed using specified proportions of ingredients. The method of measuring materials for mortar and grout shall be such that proportions of materials are controlled.

3. Construction details, procedures and workmanship are in accordance with the plans and specifications.

4. Placement, splices and reinforcement sizes are in accordance with the provisions of this chapter and the plans and specifications.

2105.3 Compliance with .

2105.3.1 General. Compliance with the requirements for the specified compressive strength of masonry shall be in accordance with one of the sections in this subsection.

2105.3.2 Masonry prism testing. The compressive strength of masonry determined in accordance with U.B.C. Standard 21-17 for each set of prisms shall equal or exceed . Compressive strength of prisms shall be based on tests at 28 days. Compressive strength at seven days or three days may be used provided a relationship between seven-day and three-day and 28-day strength has been established for the project prior to the start of construction. Verification by masonry prism testing shall meet the following:

1. A set of five masonry prisms shall be built and tested in accordance with U.B.C. Standard 21-17 prior to the start of construction. Materials used for the construction of the prisms shall be taken from those specified to be used in the project. Prisms shall be constructed under the observation of the engineer or special inspector or an approved agency and tested by an approved agency.

2. When full allowable stresses are used in design, a set of three prisms shall be built and tested during construction in accordance with U.B.C. Standard 21-17 for each 5,000 square feet (465 ) of wall area, but not less than one set of three masonry prisms for the project.

3. When one half the allowable masonry stresses are used in design, testing during construction is not required. A letter of certification from the supplier of the materials used to verify the in accordance with Section 2105.3.2, Item 1, shall be provided at the time of, or prior to, delivery of the materials to the jobsite to assure the materials used in construction are representative of the materials used to construct the prisms prior to construction.

2105.3.3 Masonry prism test record. Compressive strength verification by masonry prism test records shall meet the following:

1. A masonry prism test record approved by the building official of at least 30 masonry prisms which were built and tested in accordance with U.B.C. Standard 21-17. Prisms shall have been constructed under the observation of an engineer or special inspector or an approved agency and shall have been tested by an approved agency.

2. Masonry prisms shall be representative of the corresponding construction.

3. The average compressive strength of the test record shall equal or exceed 1.33 .

4. When full allowable stresses are used in design, a set of three masonry prisms shall be built during construction in accordance with U.B.C. Standard 21-17 for each 5,000 square feet (465 ) of wall area, but not less than one set of three prisms for the project.

5. When one half the allowable masonry stresses are used in design, field testing during construction is not required. A letter of certification from the supplier of the materials to the jobsite shall be provided at the time of, or prior to, delivery of the materials to assure the materials used in construction are representative of the materials used to develop the prism test record in accordance with Section 2105.3.3, Item 1.

2105.3.4 Unit strength method. Verification by the unit strength method shall meet the following:

1. When full allowable stresses are used in design, units shall be tested prior to construction and test units during construction for each 5,000 square feet (465 ) of wall area for compressive strength to show compliance with the compressive strength required in Table 21-D; and

EXCEPTION: Prior to the start of construction, prism testing may be used in lieu of testing the unit strength. During construction, prism testing may also be used in lieu of testing the unit strength and the grout as required by Section 2105.3.4, Item 4.

2. When one half the allowable masonry stresses are used in design, testing is not required for the units. A letter of certification from the manufacturer of the units shall be provided at the time of, or prior to, delivery of the units to the jobsite to assure the units comply with the compressive strength required in Table 21-D; and

3. Mortar shall comply with the mortar type required in Table 21-D; and

4. When full stresses are used in design for concrete masonry, grout shall be tested for each 5,000 square feet (465 ) of wall area, but not less than one test per project, to show compliance with the compressive strength required in Table 21-D, Footnote 4.

5. When one half the allowable stresses are used in design for concrete masonry, testing is not required for the grout. A letter of certification from the supplier of the grout shall be provided at the time of, or prior to, delivery of the grout to the jobsite to assure the grout complies with the compressive strength required in Table 21-D, Footnote 4; or

6. When full allowable stresses are used in design for clay masonry, grout proportions shall be verified by the engineer or special inspector or an approved agency to conform with Table 21-B.

7. When one half the allowable masonry stresses are used in design for clay masonry, a letter of certification from the supplier of the grout shall be provided at the time of, or prior to, delivery of the grout to the jobsite to assure the grout conforms to the proportions of Table 21-B.

2105.3.5 Testing prisms from constructed masonry. When approved by the building official, acceptance of masonry which does not meet the requirements of Section 2105.3.2, 2105.3.3 or 2105.3.4 shall be permitted to be based on tests of prisms cut from the masonry construction in accordance with the following:

1. A set of three masonry prisms that are at least 28 days old shall be saw cut from the masonry for each 5,000 square feet (465 ) of the wall area that is in question but not less than one set of three masonry prisms for the project. The length, width and height dimensions of the prisms shall comply with the requirements of U.B.C. Standard 21-17. Transporting, preparation and testing of prisms shall be in accordance with U.B.C. Standard 21-17.

2. The compressive strength of prisms shall be the value calculated in accordance with U.B.C. Standard 21-17, Section 21.1707.2, Item 2, except that the net cross-sectional area of the prism shall be based on the net mortar bedded area.

3. Compliance with the requirement for the specified compressive strength of masonry, , shall be considered satisfied provided the modified compressive strength equals or exceeds the specified . Additional testing of specimens cut from locations in question shall be permitted.

2105.4 Mortar Testing. When required, mortar shall be tested in accordance with U.B.C. Standard 21-16.

2105.5 Grout Testing. When required, grout shall be tested in accordance with U.B.C. Standard 21-18.

Go to Table of Contents
Go to previous section: 2104
Go to next section: 2107


Commercial Asbuilts: BOMA Asbuilt | Definitions | Projects | Project Types | FAQ | Useful links
Residential Asbuilts: Projects | Asbuilt Services | FAQ
Contact | Copyright | Privacy Policy | Site Map | News