(Steel) StiffenersBricklayingBuilding material testingConcrete cuttingConcrete worksCrane work and rentalDemolition worksDrainage worksDredgingDry constructionEarthworksGarden and landscape constructionGeotechnical investigationsIndustrial construction and hall buildingLocksmith worksOutdoor facilitiesPaving worksReinforced concrete worksRemediation worksSealing worksShellSteel constructionStructural engineeringTransport services
Air conditioningBuilding technology/ building services (building automation)Electrical installationPhotovoltaicsPlumbing workRemediation worksSolar panelsStoves and fireplacesVentilation