Precaution of excavation?

1. Excavation area should be suitable barricade 
2.  Put sign boards lights and flags 
3. Avoid heavy vehicle coming near the sides 
4. PPE like helmet, safety shoes should be used 
5. Keep the excavated soil at least 5 feet distance 
6. Excavated sides should be sloped bake to a safe angle 
7. Hand excavation should be done at the present of UG pipes or cables place 
8. Cutting shall be done from top to bottom 
9. All narrow trenches 4 feet or more deep shall be supplied at least one ladder 
10. While excavating on the slope on the slope whose height is over 10 feet men should use safety belts