THE BEAM OF THE LARGE SIZED STAGE

摘要

A beam of a large scale stage is provided to minimize a delicate droop and to control hardness of a structure by introducing tensile force using a tension wire to generate an opposite moment with respect to a moment generated at the beam. Lower portions of both ends of a beam are supported by a support. The support is movable along a support base unit on a granite surface plate. An inner frame(1) is comprised of compound materials. A compressive force introducing unit(2) is formed at a side of the inner frame. A metal reinforcement material(3) is formed at an external side of the inner frame. End closures(4) are detachably formed at both ends of the metal reinforcement. The inner frame is formed as an I-type frame(11). The inner frame includes a compound material sandwich structure(12) at both sides of the I-type frame. The inner frame is formed as an I-type box frame having a hollow unit. The compressive force introducing unit is comprised of a tension wire and a wire fixing unit.