4390KONSTRUKSI KHUSUS LAINNYA

foundation construction activities, including the installation of piles into the ground; | moisture and water retention work activities; | building dehumidification (humidification) activities; | excavation activities (shaft sinking); | non-self-assembled steel frame construction activities; | reinforcing steel bending activities at construction sites; | installation of stones, blocks, bricks, and others; | roofing activities, such as the installation of roof coverings; | erection and dismantling of scaffolding and work platforms; | installation of road safety fences, traffic signs; | road painting and other markings; | installation of chimneys and ovens (baking) for industrial purposes; | work activities that require climbing skills and the use of related equipment, for example working on tall buildings; | work below ground level; | installation of noise-reducing walls, for example along roads; | installation of street furniture; | construction of outdoor swimming pools; | crane rental with operators; | conservation, repair, and restoration of cultural heritage buildings.