A reinforced rectangular beam with width b= 400 mm, effective depth d3570 mm and f=28 MPa. The beam is subjected to a total factored shear force 1/2 V,=60 kN. Use V = 0.17 [f] b d. The beam :needs اخترأحد الخيارات a. Specially designed stirrups .b. No need for stirrups c. Minimum shear reinforcement (stirrups spaced .at Smar) max

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Alloys

An alloy is an admixture of two or more metals or a metal and a non-metal. Since ancient times, man has been using alloys. Alloying helps to retain the properties of the parent matter, such as hardness, strength, toughness, ductility and is corrosion-resistant. Copper alloys such as brass have antimicrobial properties that help to fight against (Coronavirus disease 2019) COVID-19 and other hospital-acquired infections. Some common alloys are brass, bronze, solder steel, etc. Most alloys have a lower melting point than their constituents. This is due to the presence of a nonmetal as one of the constituents that behaves as an impurity and restricts the raise of melting point.