Official Answer
Answer
Gefen gefe $z$ shine nisan axial daga gefen tsagi zuwa ƙarshen shaft ko gidaje. Idan $z$ ya yi ƙanƙanta sosai, kayan da ke tsakanin tsagi da ƙarshen ɓangaren za su yi kasala a cikin shear kafin tsagi da kansa ya samar. Ana ba da shawarar mafi ƙarancin gefen gefe don zama $3 \ sau d$ (sau uku zurfin tsagi). Wurin shear $A_s$ shine $\pi \cdot D \cdot z$. Ana ba da nauyin gazawar $P_{edge}$ ta $P_{edge} = A_s \cdot \ tau_{allow}$, inda $\tau_{allow}$ shine ƙarfin juzu'i na kayan gidaje (kimanin $0.6 S_y$). Rashin kula da isasshiyar gefen gefen yana kaiwa ga 'bushewa' bangon gidaje, yanayin gazawar bala'i a cikin manyan silinda na hydraulic.
