Beam on two supports: shear force diagram (WP961)

Beam on two supports: shear force diagram (WP961)

application of the method of sections to determine the shear force



  • WP 961consists of a beam mounted on two supports which is subjected to point loads.
  • The beam is cut at one point.
  • At that point there is a low-friction hinge with one degree of freedom.
  • The force gauge indicates the internal reaction (shear force) at this point on the beam.
  • An adjuster nut on the force gauge is used to align the beam horizontally and balance out any deflection.
  • The reactions are determined from the static conditions of equilibrium.
  • To investigate the effect of the point loads in the beam, it is notionally split into two segments.
  • Applying the method of sections, the internal forces and moments are plotted onto the two segments and calculated by way of conditions of equilibrium.

Technical Details:


  1. investigation of shear force on beam mounted on 2 supports
  2. measurement of shear force in beam by low-friction hinge with 1 degree of freedom
  3. position of hinge at 1/3 span
  4. 2 bearing supports
  5. loading of beam by 1-to-3-point loads
  6. force gauge to indicate shear force
  7. adjuster nut for horizontal alignment of beam
  8. storage system to house the components

Technical Data:


  • total length: 1100mm
  • span: 800mm

Shear force measuring range: ±50N


  • 3x 1N (weight holder)
  • 3x 1N (hanger), 12x 1N, 9x 5N
  • max. weight per hanger and weight holder: 20N

Dimensions & Weight:

  • L x W x H: 1100x320x780mm (assembled)
  • L x W x H: 1180x490x180mm (storage system)
  • Total weight: approx. 40kg

Learning Objections/Experiments:

  • calculation of the reactions arising from the static conditions of equilibrium
  • application of the method of sections to calculate the internal forces:
  • under a point load
  • under multiple point loads
  • calculation of the shear force diagram
  • comparison of calculated and measured shear force values

Scope of Delivery:

  • 1 experimental unit
  • 1 set of weights
  • 1 set of accessories
  • 1 storage system with foam inlay
  • 1 set of instructional material


·         Optional: WP 300.09 Laboratory trolley


Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.