Official Answer
Answer
Ana buƙatar radius na ƙasa sau da yawa don rage yawan damuwa a cikin shaft ko gidaje, musamman a aikace-aikacen gajiya mai tsanani. Koyaya, idan radius $ R$ yayi girma da yawa, yana hana sashin giciye rectangular na zoben karkace daga zama a matsakaicin zurfin tsagi. Wannan yana rage girman yankin goyon baya yadda ya kamata. Ƙa'idar ƙa'idar ita ce radius kada ya wuce $10\%$ na kauri $T$. Idan ana buƙatar babban radius don mutuncin tsari, dole ne injiniyan ya yi amfani da zobe tare da 'na musamman' diyya ko mai wanki. Rashin yin lissafin wannan yana haifar da yanayin gazawar 'birgima' inda zoben ke murɗawa daga cikin tsagi ƙarƙashin nauyin axial.
