<h2>...wide, accommodating arbitrary window cut-outs</h2> Indonesia is presently experiencing a building boom. Apart from residential building and infrastructure projects, up to 800 new hotels with a total of 100,000 rooms are to be opened in the next ten years. In order to meet the needs in such a short time, market-driven solutions are required for the country’s building industry. One of the leading Indonesian precast concrete element manufacturers uses the upcrete tech- nology from the Hockenheim-based company Ratec.