Only employees who have the necessary competence may build or change shoring in excavation pits.If the excavation pit is deeper than 2 m, the shoring shall be dimensioned by a qualified person and the calculations shall be documented.Before excavation work under the foundation level is initiated for building structures, or where the ground is subjected to extra load, the excavation shall be assessed by a person with geotechnical expertise.Before the excavation of trenches along the foot of a slope or a slope with a gradient towards the side of the trench of more than 1:10, the plans for the excavation shall be assessed by a person who has the necessary geotechnical knowledge before the work starts.The construction, placement, alteration or removal of a cofferdam, or caisson shall only take place under the supervision of a competent person.
