Beam : Troop ordered in divisions or formed in rows .
In Botany is the name given to top or top of a leaf. The part of back or down, is called underside. The beam of the leaf is usually darker and brighter than the underside.
Herd, set of sticks, branches, pipes.
IT IS TO DEFINE A VARIABLE UNIT, SAY 1 TUBE BEAM. TO say 1 meter of pipe already that your unit is in meters.