Procedure for Direct Shear Test: 1. Take 2.5 Kg air dried soil sample passing through 4.75 mm and retained on 2.36mm IS sieve. 2. Measure the internal dimensions of the shear box. Fix the upper part of the box to the lower part using the locking screws. Attach the base plate to the lower part. 3. For performing a undrained test, Plain toothed grids (without perforations) are used at the top and bottom faces of samples. Place the porous stone over the grid plate. 4. Weigh the shear box with base plate, grid plate and porous stone. Place the soil specimen in the box. Tamp it directly in the shear box at the required density. 5. When the soil in the top half of the shear box is filled, weigh the box with soil specimen. Weigh the box inside the box contained and fix the loading pad on the box. Mount the box contained on the loading frame. 6. Bring the upper half of the box in contact with the proving ring. Check the contact by giving a slight movement. 7. Mount the loading yoke on the ball placed on the loading pad. Mount the dial gauge on the loading yoke to record the vertical displacement and another dial gauge on the container to record the horizontal displacement. 8. Place the slotted weights of 0.5 N/mm2 on the loading yoke to apply a normal stress. Note the reading of the vertical displacement dial gauge. 9. Remove the locking screws. Using the spacing screws, raise the upper part slightly above the lower part such that the gap is slightly larger than the maximum particle size. Remove the spacing screws. 10. Apply the horizontal shear load at a constant rate of strain of 0.2mm/minute till shear failure of soil. Record the reading of the proving ring, the vertical displacement dial gauge and the horizontal displacement dial gauge at regular time intervals to know the shear stress at failure. 11. Repeat the test on identical specimens under the normal stresses of 1.0, 1.5, 2.0 N/mm 2 etc. Plot the graph by taking the value Normal Stress as abscissa and the maximum shearing stress as ordinate to find shear strength of soil.