The fixed end moment of a uniform beam of span $$l$$ fixed at the ends, subjected to a central point load $$P$$ is

For a given shear force across a symmetrical $${\rm I}$$-section, the intensity of shear is maximum at

A beam fixed at the ends and subjected to lateral loads only is statically indeterminate and the degree of indeterminacy is

The state of two dimensional stresses acting on a concrete lamina consists of a direct tensile stress, $${\sigma _x} = 1.5\,\,N/m{m^2},$$ and shear stress, $$\tau = 1.20\,N/m{m^2},$$ which cause cracking of concrete. Then the tensile strength of the concrete in $$N/m{m^2}$$ is