SPECIFICATION FOR EARTHWORK IN EXCAVATION FOR FOUNDATION
Stability of existing structures. Before starting excavation, trial pits should be dug to ascertain the depth and nature of its foundation. Shoring should be used in all cases when the depth of excavation exceeds its distance from existing structure.
Excavation. Foundation trenches shall be dug out to the exact width of the foundation concrete and the sides of the trenches shall be left plumb where the nature of soil admits of it. Where the soil is not good and does not permit vertical sides, the side must be sloped back or shored up carefully. Excavated earth shall not be placed within 1 meter (3 feet) of the edge of the trench…..
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