Beam is a structural member whose lateral dimensions are much smaller than the longitudinal dimension and used to carry loads perpendicular to the longitudinal axis. The beams are generally used in buildings, bridges, trusses, etc., Copy the link given below and paste it in new browser window to get more information on SFD Load Diagram Examples:- http://www.transtutors.com/homework-help/mechanical-engineering/bending-moment-and-shear-force/sfd-load-diagram-examples.aspx