How to Decide Foundation Depth if Not Given in Drawing | क्या हम पता कर सकते हैं ?

Sometimes for some reason there comes need to excavate soil to get proper foundation level when it is not mentioned in drawing, or we get a common drawing for a structure mostly box culvert where a need arises for excavation upto a certain depth. In that case adopt certain criterias for the excavation depth, watch the video to know more.
#BoxCulvert #Foundation #Depth