$10-20.$ A $7$ ft beam with full lateral support for its compression flange is supporting a moving concentrated live load of $58$ k $.$ Using $50$ ksi steel, select the lightest W section. Assume the moving load can be placed anywhere in the middle $5$ ft of the beam span. Choose a member based on moment then check if it is satisfactory for shear and compute the minimum length of bearing required at the supports from the standpoint of Web Local Yielding and Web Local Crippling. Neglect self$-$weight of the beam.

Figure $P10-20$

$10-20.$ A $7$ ft beam with full lateral support for its compression flange is supporting a moving concentrated live load of $58$ k $.$ Using $50$ ksi steel, select the lightest W section. Assume the moving load can be placed anywhere in the middle $5$ ft of the beam span. Choose a member based on moment then check if it is satisfactory for shear and compute the minimum length of bearing required at the supports from the standpoint of Web Local Yielding and Web Local Crippling. Neglect self$-$weight of the beam.

Figure $P10-20$