What is one way shear? Explain with a suitable demonstration.

One Way Shear

This worked out seen a similar case is the case of wall footings. For square footings also the critical section is considered along a vertical plane extending to full width of the base located at a distance equal to the effective depth of the footing. The lowest allowable shear of 0.35N/mm2 or 350kN/m2 is used. Please note that the allowable shear stress can be increased based on tension reinforcement provided according to some codes.  The upward shear force acting along the critical section assuming effective depth =d, as demonstrated in given figure:

Figure: One wear shear