Building technology/ building services (building automation)Gas installationHeatingJointing workPlumbing and sheet-metal workRemediation worksSanitarySolar panelsTiles and panelsVentilation
Bridge constructionCivil engineeringConcrete worksIndustrial construction and hall buildingJointing workReinforced concrete worksRemediation of hazardous substances / Asbestos abatementRemediation worksStructural engineering