"Structural members are usually classified according to the types of loads that they support. For instance, an axially loaded bar supports forces having their vectors directed along the axis of the bar, and a bar in torsion supports torques (or couples) having their moment vectors directed along the axis. In this chapter, we begin our study of beams, which are structural members subjected to lateral loads, that is forces or moments having their vectors perpendicular to the axis of the bar."

BEAM
A SUPPORT THAT IS USED TO TRANSMIT AND SUPPORT FORCES

CANTILEVER BEAM
A BEAM THAT IS FIXED AT ONE END AND HANGS FREE AT THE OTHER END.

PIN SUPPORT
A BOLT OR PIN THAT TYPICALLY IS REMOVABLE AND SERVES AS A HINGE FOR A SUPPORT MEMBER.

PLANE
NORMALLY A FLAT, IMAGINARY SURFACE

PLANE OF BENDING
A PLANE ORIENTED TO INCLUDE THE BENDING CURVE OF A COLUMN OR SUPPORTING MEMBER

ROLLER SUPPORT
A SUPPORT FOR A BEAM, STRUCTURE OR ASSEMBLY THAT IS FREE TO ROLL.