A support beam 18 has an elongate member, with integrally formed mounting flanges 25 at spaced locations along the member. The beam 18 can be used as a subcomponent of a vibratory screen separator apparatus (10, fig.1). The form of the beam 18, particularly the integrally formed mounting flanges 25, may give advantages in the quick and simple assembly of the beam to the vibratory screen separator (10,fig.1).