Conventional TSC beam of rigid, U-shaped four side welded to the upper and lower-stage right and left webs an upper and lower flange (8), larger is the surface 2 to the lower flange the left and right that the processing of the upper flange and the web in a press integrally welding the U-shaped (Fig. 7), medium is one-piece (3) separated by the lower flange is W-shaped, welded face one beam half-mold so as to form a Y-like protrusions (Fig. 6), the small form a book-like protrusions in the center, and forming and the upper flange of all four species is in the form projecting from the top left and right horizontal direction external webs. Upper flange deck plates (9, 29) to lay that shear yeongyeoljae (as well serve as a chimteok as to integrate the beam slab and TSC 5, 6, stud type of 7 or Fig. 3, 4 the a-beams for stroke the slab concrete because Shea connector) to be also used as a basis for attaching the disadvantage that the entire width of the yeoseo a minimum width of 90mm beam too wide. In addition, the upper flange (2, 22) of the TSC security because it is the upper, open the right and left separate them for lateral buckling due to bending compression during construction must be enclosed in a separate horizontal member (27, 37) to prevent and the concrete lateral pressure filling therein It can resist. Since the thickness of the conventional steel beams TSC is more than 6mm short span of one pole span, heavy load, the suitable assisted in the construction of thirteen in competition with other structural beam. Thus, even if produced more than 6mm steel plate was attached to the front yeongyeoljae easy to develop a bottleneck-shaped upper flange upper flange beams TSC (hereafter BNTSC I) where affordability is assured. This is seeing smaller the column size to narrow junction, the entire width of the beam in Fig. 1 BNTSC and bottleneck-like upper flange TSC Bo (BNTSC) that can be attached to inexpensive bolts + steel pipe (7) Print yeongyeoljae easily instead of welding of invention . Webs (3, 23) Bo BNTSC (1) is a stirrup pretext of reinforced concrete beams. The upper flange (2, 22) is for use with the jaw span the bending compressive force borne by the lower horizontal portion deck plates (9, 29) during construction which, because on the inside webs (3, 23) decreases the torsional moment due to unevenly distributed load effects there is. A vertical transfer unit to insert the connection pipe + re bolt (7) in the bolt hole (6) drilled in advance, and also President and the shear stress to the adhesion of yeongyeoljae role on itself and securing the nut (8). The President and the bolt + steel pipe to maintain the width between the left and right upper flanges prevent the lateral buckling of the compression force deflection during construction, and even construction scaffolding role. Since the bottleneck-shaped upper flange exclude the possibility that the concrete and the web of internal security BNTSC cause interfacial separation. The lower flange (5) is a tension member that corresponds to the tensile force carrying warp-like protrusions (5, 25) serves to increase the cross-sectional area of ​​the warp tension member.