Isihlalo esinezingalo I-Chicago Line yisihlalo esinezingalo esihambisana ne-ottoman, esaklanyelwe ukuhlala isikhathi eside uphumule. Isihlalo senziwe ngokhuni oluqinile olubazwe ngobuchwepheshe be-five axis, kanti izingalo zaso zilolongwe nge-lathe elawulwa yikhompuyutha (CNC). Isihlalo sihlanganisa amajika amabili athambile alandela ukwakheka komzimba womuntu kanye ne-foam esebenza ngezinga eliphezulu. Zonke izingxenye zokhuni zibazwe ngendlela yokuthi isihlalo sibonakale siyingxenye eyodwa. Ukwakheka kwaso kugqugquzelwe yizakhiwo zesimanje nezezimboni zedolobha laseChicago. I-ottoman yandisa ukunethezeka futhi iphelelisa isethi.