This standard BS EN 13331-1:2002 Trench lining systems is classified in these ICS categories:
93.020 Earthworks. Excavations. Foundation construction. Underground works
91.220 Construction equipment
This European Standard specifies requirements for metallic trench lining systems assembled completely from purpose made prefabricated components. It includes material, constructional and structural requirements.
Partial safety factors for design refer to annex A.