Technological and Higher Education Institute of Hong Kong (Thei. Faculty of Science and Technology | Civil Engineering There must be a force V, acting within the material of the beam such that Consider the vertical equilibrium of the left part of the beam if itis cut by a section at X. Fig 1a. Laboratory setup for measuring beam shear Fig 1b. Hi-Tech HST.1/10 Structures Apparatus Fig 2b. Hi-Tech HST.1/11 Structures Apparatus