By James E. Amrhein , Max L. Porter
Read Online or Download Reinforced Masonry Engineering Handbook: Clay and Concrete Masonry, Sixth Edition PDF
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Extra resources for Reinforced Masonry Engineering Handbook: Clay and Concrete Masonry, Sixth Edition
Fi, Fn, Fx = lateral force applied to level i, n or x respectively. Fp = lateral forces on the part of the structure. Fs = allowable tensile or compressive stress in reinforcement, psi. Fsc = allowable compressive stress in column reinforcement, psi. Hz = Hertz, cycles per second. i = interval. e. = for example. in. = inches. in. lbs = inch pounds, moment. I = moment of inertia about the neutral axis of the cross-sectional area, in4. Fsu = ultimate tensile stress of steel, psi. Ft = that portion of the base shear, V, considered concentrated at the top of the structure in addition of Fn.
Often the standard is updated 2 or 3 times a year. The Grades (S and N) and Types (I and II) have been deleted in favor of the more rigorous requirements. Consequently, it is no longer appropriate to specify a 'Grade N, Type I' unit. Grade designations were deleted in the early 1990's and the type designation was withdrawn in the year 2000. 6. 6 Strength and Absorption Requirements (ASTM C90 Table 2) Compressive Strength1, Min. 2, (Avg. of 3 Units) with Oven Dry Weight of Concrete (lb/cu. ft) Average Net Area Weight Classification Avg.
Psi) Conditions) M Cement- S N Lime O 2500 1800 750 350 75 75 75 75 12 12 142 142 M S N O 2500 1800 750 350 75 75 75 75 12 12 142 142 M Masonry S Cement N O 2500 1800 750 350 75 75 75 75 18 18 203 203 Mortar Cement Not less than 21/4 and not more than 31/2 times the sum of the separate volume of cementitious materials Note: The property requirements of this table cannot be used as a requirement quality control of field prepared mortar, instead ASTM C780 should be used for this quality control.