Square bututu sunan ne ga square bututu da rectangular bututu, wato, karfe bututu tare da daidai da kuma m gefen tsawo.An yi na birgima tsiri karfe bayan aiwatar jiyya.Gabaɗaya, ƙarfen tsiri yana buɗewa, an daidaita shi, an gurɓata shi da waldawa don samar da bututu mai zagaye, sannan a yi birgima a cikin bututu mai murabba'i, sannan a yanke shi cikin tsayin da ake buƙata.Har ila yau aka sani da murabba'i da rectangular sanyi-kafa m sashe karfe, ake magana a kai a matsayin square tube da rectangular tube, code sunayen F da J bi da bi.