QFloorColumn Systems CHAPTER 3a. R/C BEAMS: TBEAMS AND DOUBLY REINFORCED BEAMS Slide No. 3 Introduction to TBeams ENCE 355 ©Assakkaf QBeam and Girder System – This system is composed of slab on supporting reinforced concrete beams and girder.. – The beam and girder framework is, in turn, supported by columns. – In such a system, the ...