...figure 26. The designs were based on the use of concrete having an ultimate compressive strength, fc, of 3,000 pounds per square inch at 28 days. A modular ratio, n, of 10 was used. An allowable concrete compressive stress of 0. 45 fc was used for normal loading...

...edition. The designs were based on the use of concrete having an ultimate compressive strength of 3, 000 pounds per square inch at 28 days. A modular ratio of 10 was assumed. Working stresses for the reinforcement and concrete under usual loading conditions are as shown in...

...Requirements for Reinforced Concrete, " ACI 318-56. The normal working stresses used are shown on figure 40. The designs were based on the use of concrete having...pounds per square inch at 28 days. A modular ratio of the elasticity of steel to concrete was assumed equal to 10. For unusual loading conditions, working...

..."Recommended Practice and Standard Specifications for Concrete and Reinforced Concrete, " 1940 edition. The designs were based on the use of concrete having a compressive strength of 3, 000 pounds per square inch at 28 days. Special loading conditions, allowable stress limitations,...

...were near the downstream face of the dam. 55. STRUCTURAL DESIGN, (a) General.-The design was based on concrete having a compressive strength of 3,000 pounds per square inch at 28 days for structural concrete and 2,500 pounds per square inch at 28 days for mass concrete. The allowable...

...it was decided that a seismic acceleration of 0.15 g should be used. The structure was designed for concrete having a compressive strength of 3,000 pounds per square inch at 28 days after placement and allowable working stress in the reinforcement of 20,000 pounds per square inch...

...shown on figures 34 through 37. (b) Concrete Design.-The concrete design was based on concrete with a compressive strength of 3,000 pounds per square inch at 28 days. Allowable working stresses are shown on figure 38. (c) Parapet-The parapet was designed for a lateral...

...departure from this was the allowance of increased working stresses for unusual loading conditions. The designs were based on the use of concrete having...square inch at 28 days. A modular ratio of 10 was used. For unusual loading conditions, the allowable increased value of the working stresses is shown...

...concrete of rectangular section, designed for H-20 wheel load. Structural design is based on t concrete compressive strength of 3,000 pounds per square inch at 28 days, a working stress of 20,000 pounds per square inch tension in reinforcement with a specified minimum yield...

...30VJtínS H31VM ÌJIO/\H3S3M 56 OND CU DESIGN 1 a I SPILLWAY AND OUTLET WORKS designs were based upon the use of concrete having a compressive strength...were permitted to exceed the allowable by 33 percent. Except as otherwise specifically noted, the allowable working stress was 20,000 pounds per square inch...