The sign convention used in the shear force and bending moment diagrams is (positive values shown): Positive values imply a downward deflection and negative values imply an upward deflection. The maximum values of each are output as ‘Moment Demand’, ’Shear Demand’ and ‘Deflection’, along with the diagrams along the length of the beam. Once the loading and geometry have been specified, the calculator automatically uses the ClearCalcs finite element analysis engine to determine the moments, shear forces and deflections. The sign convention used for loading is (positive values shown): The calculator supports a variety of different loading types which can be applied in combination. The reactions at each of the supports are automatically updated as supports are added, changed or deleted, based on the specified loading. The beam calculator also allows cantilever spans at each end, as the position of the first support does not have to be equal to 0mm and the last support position does not have to be equal to the length of the beam. A minimum of one fixed support, or two pinned supports are required. The support type can either be pinned (fixed in translation, free in rotation) or fixed (fixed in both translation and rotation) and is selected from the drop-down menu. Position of Supports from Left allow the user to input any number of supports, and specify their position along the length of the beam. Alternately, you can create your own custom section using our free moment of inertia calculator. The properties E, A, and Ix for other beam sections can be obtained from the ClearCalcs section properties library. Second Moment of Area (or Moment of Inertia) is also specific to the beam section selected, and again defaulted to the properties of a common steel beam. Young’s Modulus is set to a default value of 200,000 MPa or 29000 ksi for structural steel, but can be edited by the user.Īrea of the Cross-Section is specific to the beam section selected, and is defaulted to the values for a common steel beam. Length of Beam is the total including all spans of the beam, in mm or ft. The properties of the beam and section are specified by typing directly into the input fields. Clicking on any of the input/property labels gives a descriptive reference explanation.
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