Stock Photo - ***MARCH 31, 1977, FILE PHOTO*** The Research Institute of Civil Engineering Prague-Hostivar, the Agricultural Building Association Blansko and the Brno plant of Agroprojekt Prague have developed a system that allows designers to design buildings for livestock breeding in 84 variants using a modular system. Almost 1 million kg of steel per year and a commensurate amount of energy, extraordinary transport costs, assembly mechanisms, construction time and, last but not least, agricultural land will be saved by solving a national research task - new construction sets for large-scale agricultural buildings. Right: Josef Necas, Karel Dvorak and Josef Kadlec prepare a 15-metre Profile I stand for welding caterpillars on a welding bench in a C02 protective atmosphere. (CTK Photo/Frantisek Nesvadba)