Kubaka Hypocaust, Uburyo bwo Gushyushya Munsi y'Ubutaka — Gushyushya Inzu Kw'Abaroma

Cukura ahazaba hasi kugeza ku bujyakuzimu bwa cm 60 kugeza kuri 80 nk'izo munsi y'urwego rw'ubutaka burangiye. Ubu bujyakuzimu bugomba kwakira urufatiro rwa beto, pilae z'amatafari (akenshi zifite uburebure bwa cm 40 kugeza kuri 60), n'amatafari y'ubutaka buzamuye. Ringaniza kandi ukomeze ubutaka neza. Shyiraho urufatiro rw'amabuye mato yakomejwe (statumen) rufite ubujyakuzimu bwa cm 15 nk'izo, hanyuma usige icyiciro cya opus signinum (sima y'ingwa ivanze n'ibumba ryasekuwe) gifite ububyibuho bwa cm 10 nk'izo hejuru y'amabuye kugira ngo habe ubutaka bwo hasi bukomeye budacengerwamo n'amazi. Uru rufatiro rugomba guhanamuka gato cyane (nka 1 kuri 100) rugana ku munwa wa praefurnium kugira ngo amazi yose aturutse ku mwuka atembere hanze aho kwireka munsi y'ubutaka.

Rundanya amatafari mato y'impande enye (bessales, ya cm 20 nk'izo ku mpande zose) abe inkingi ukoresheje sima y'ingwa hagati ya buri cyiciro. Buri pila igomba kuzamuka cm 40 kugeza kuri 60 hejuru y'ubutaka bwo hasi, bitewe n'uburebure bw'icyuho cy'umwuka wifuza. Tandukanya pilae mu buryo buringaniye ku ntera ya cm 40 kugeza kuri 60 nk'izo uvuye hagati kugera hagati — hafi bihagije ku buryo amatafari manini azirambikwaho atazasaduka munsi y'uburemere bw'ubutaka bwo hejuru. Koresha igipimo cy'uburinganire n'umugozi kugira ngo pilae zose zigire uburebure bumwe neza, kuko ubutaka buzamuye bugomba kuba buringaniye neza. Pilae zisanzwe zigizwe na bessales 8 kugeza kuri 12 zirundanyijwe n'ingingo za sima zoroshye. Reka sima ikomere nibura amasaha 48 mbere yo gushyiraho amatafari y'ubutaka buzamuye.

Shyira amatafari manini ya bipedalis (ya cm 60 nk'izo ku mpande zose, afite ububyibuho bwa cm 5) hejuru ya pilae kugira ngo habe ubutaka buzamuye. Buri tafari rigomba kuruhukira nibura kuri pilae enye. Shyira amatafari hejuru ya pilae ukoresheje icyiciro gito cya sima y'ingwa kugira ngo ufunge ingingo kandi ubuze umwuka ushyushye kuzamuka unyuze mu byuho. Hejuru y'icyiciro cy'amatafari, siga icyiciro cya cm 5 kugeza kuri 8 cya opus signinum cyangwa beto y'ingwa kugira ngo wongere ubushobozi bwo kubika ubushyuhe kandi ukore ubuso bw'ubutaka bworoshye kandi buramba. Ubushobozi bwo kubika ubushyuhe bw'iki cyiciro cya beto ni ingenzi — bukurura ubushyuhe bw'umwuka ushyushye uri munsi maze bukabutanga buhoro kandi mu buryo buringaniye mu cyumba kiri hejuru, bikabuza ahantu hashyushye cyane hejuru ya pilae.

Shyira amatafari y'agasanduku k'impande enye arimo ubusa (tubuli) ahagaze yegamiye inkuta z'imbere, impera zayo zo hasi zifunguye zihuza n'icyuho cyo munsi y'ubutaka kandi impera zayo zo hejuru zisohokera mu rukuta zijya mu muyoboro w'ishyiga wo hanze. Buri tubulus ifite uburebure bwa cm 30 nk'izo, ubugari bwa cm 15, n'ubujyakuzimu bwa cm 10, ifunguye hejuru no hasi. Zirundanye zihagaze maze uzifatishe ku buso bw'urukuta no ku zindi ukoresheje sima, zikore imiyoboro ihagaze idacika. Tandukanya inkingi za tubuli ku ntera ya cm 30 kugeza kuri 50 uzengurutse icyumba. Umwuka ushyushye uzamuka utera umuyaga kamere ukurura umwuka mushya w'umuriro muri praefurnium, unyuze mu cyuho cyo munsi y'ubutaka, ukazamuka unyuze muri tubuli, ugashyushya inkuta n'ubutaka.

Ubaka itanura (praefurnium) ku mpera imwe ya hypocaust, hanze y'icyumba gishyushywa. Ubaka agasanduku k'umuriro k'amatafari gafite umunwa w'uruziga ufite ubugari bwa cm 40 kugeza kuri 50 nk'izo n'uburebure bwa cm 30 ugaburira mu buryo butaziguye icyuho cyo munsi y'ubutaka. Umunwa w'agasanduku k'umuriro ugomba kubakwa mu matafari adashya cyangwa amatafari y'ibumba yatwitswe neza kugira ngo wihanganire ubushyuhe bwinshi buhoraho. Ahongerwa inkwi hagomba kugerwaho bivuye mu nzira y'abakozi kugira ngo abacakara cyangwa abakozi bashobore kongera inkwi mu muriro batinjiye mu byumba bishyushywa. Mu nzu z'Abaroma zo kogeramo, icyumba gishyushye cyane (caldarium) cyashyirwaga hafi ya praefurnium, icyumba gishyushye gake (tepidarium) kure gato, n'icyumba gikonje (frigidarium) kure cyane — itandukaniro ry'ubushyuhe ryagenzurwaga gusa n'intera uvuye ku muriro n'umubare w'imyanya ihuza imiyoboro.