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TABLE T MAXIMUM HORIZONTAL SPACING OF VERTICAL CONTROL JOINTS ► , Wall Vertical Spacing of Bed 'Joint Reinforcement (inches) Maximum Horizontal Spacing ( feet) ► Exterior ' none 20 16 26 8 32 - • Interior none . ` • 26 16 . 32 8 36 4 MATERIALS 4 . 1 ► Cementitious Materials.- Materials shall conform to the following applicable specifications: : 4. 1 . 1 Tortland Cement - ASTM-150 ; 4 . 1 .2 Blended Cements • ASTM C- 595 4 . 1 .3 Pozzolans - ASTM C-618 4 . 1 .4 Blast Furnace Slag Cement - ASTM C-984 4.2 ► Aggregates . Aggregates shall conform to the following specifications, except that grading requirements -shall not necessarily apply: 4.2 .1 Normal Weight Aggtegates ASTM C-33 4 .2 .2 lightweight Aggregates' - ASTM C-331 . 4 .3 ► Integral Water Repellent AdmkWm. Funits be manufactured with an integral water repellent admixture, applied at the .dosage recommended by the admixture manufacturer: : . 4 .3. 2 The integral water repellent admixture shall be certified, by the admixture manufacturer, with the wall showing no visible water when tested in accordance � . with E 514-90. . 4 .4 ► Other Constituents Air entraining agents, coloring pigments, integral water repellents, finely ground silica, and other constituents shall be •previously established as suitable for use in concrete masonry and shall conform to applicable ASTM Standards or shall be shown by test or experience to be not detrimental to the durability ' of the concrete masOmy units or any material Customarily used in masonry construction. S PHYSICAL REQUIREMENTS • ' 5. 1 ► CMd's • After. 28 days from the time. of manufacture, the units shall conform to the physical requirements prescribed in Table 3 . 5 .2 ► All units shall have a minimum age of 7 days prior to delivery to the job site. 5.3 ► Face Shell (FST) and web thicknesses (WT) for hollow units shall conform to the requirements listed . in Table 2 : TABLE 2 MINIMUM THICKNESS OF FACE- SHELLS AND WEBS ► Nominal Width (W) Of Units ► Face Shell Thickness• (FST) Minimum ► WeV Minimum Thickness ► Equivalent Web' Minimum Thickness Inches Inches Inches ; ' Inches . 4 3/4 . 3/4 1 S/R• 6 1 1 21/4 8 1 1/4 . 1 • 2 1/4 10 . 13/8 11/8 .21/2 12 1 1/2 11/8 21 j2 ' ► A Average of measurements on 3 units taken at the thinnest points when mePsured as described in C140. When this Stdndord is used for split face u r ts, a maximum of 10 percent of a split face shbr area moy have thickness less than those shown, but notkss that 3/4 inch: 6 Sum of the meosured thickness of all webs in the unit, multiplied by-12 and divided by the length of.the amt. ' -5 .4 ► Solid Units: 5.4 . 1 The net cross-sectional area of solid units in every plane parallel to the bearing' surface shall. not be .less than 75% of the gross cross-sectional area measured in the some plane: phone: I e 800 . 4 a TARMAC url : www.tarmocamenca.com ' 2/98 .