begin Services Qualifications credentials Jobs Contact Downloads imprint Bach civil engineering and cable construction Am Bahndamm 112 25469 Halstenbek Tel .: 04101 4900-0 Fax: 04101 4900-77 info@btk-bau.de Group: AK 2 member no .: 2017 Registration number: GSK000022 areas 1,2,3,4,5,7 Group W 3: ge, ku, pe Registration number: FU-0301CN0014 Registration number: 010.254690