 Khrushchyovkas featured combined bathrooms.They had been introduced with Ivan Zholtovsky's prize-winning "Bolshaya Kaluzhskaya" building, but Lagutenko continued the space-saving idea, replacing regular-sized bathtubs with 120 cm (4 ft) long "sitting baths".Completed bathroom cubicles, assembled at a Khoroshevsky plant, were trucked to the site; construction crews would lower them in place and connect the piping.