The sign convention used for shear force diagrams and bending moments is only important in that it should be used consistently throughout a project. The sign convention used on this page is as below.
BENDING MOMENT
Some times, the terms ?Sagging' and Hogging are generally used for the positive and negative bending moments respectively.
BENDING MOMENT
For the bending moment, following sign conventions may be adopted as indicated in Fig 5 and Fig 6.
Some times, the terms ?Sagging' and Hogging are generally used for the positive and negative bending moments respectively.SHEAR FORCE
The usual sign conventions to be followed for the shear forces have been illustrated in figures 2 and 3.
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