A structural support mounting means for precision, telescoping, linear slide mechanisms of the type having an outer slide member and an inner slide member, each being held in sliding relationship by ball bearings or the like, the balls being operably disposed in a ball retainer between the inner and outer slide members. The structural support mounting means is defined by an elongated rail having oppositely disposed channels formed longitudinally therein, to structurally support and receive a pair of oppositely arranged slide mechanisms, wherein each adjacent slide member is affixed to a central, load-carrying bracket for longitudinal movement of the load secured to the bracket thereof, and wherein an elongated, structural-reinforcing bar member is adapted to be received and fixedly mounted within the inner slide member. Both the rail and the reinforcing bar members are formed from an extruded aluminum material whereby structural strength, load-carrying capacity, and extended, load-carrying capacity are established with respect to the outer and inner slide members.