Answer
Matsakaicin $b/t$ shine babban al'amari na farko don hana 'karkacewa' ko 'buckling' na sashin giciyen igiyar ruwa. Babban rabo na $ b / t $ (bangon radial mai faɗi, abu na bakin ciki) yana ba da ƙarfin ɗaukar nauyi mai kyau amma yana ƙaruwa da haɗarin bazara a cikin gidaje idan raƙuman ruwa ba su yi daidai ba. Akasin haka, ƙarancin $ b/t$ (bangi mai kunkuntar, abu mai kauri) yana kwaikwayon maɓuɓɓugar waya kuma ya fi kwanciyar hankali da rundunonin gefe amma yana ba da ƙasan wurin tuntuɓar ƙasa. Don kwanciyar hankali mafi kyau, Smalley da sauran ma'auni yawanci suna ba da shawarar rabon $ b/t$ tsakanin 8 da 15. Idan rabon ya wuce 20, bazara ya zama mai saukin kamuwa da murdiya 'tasa', inda diamita na ciki da na waje ke karkata a farashi daban-daban a ƙarƙashin kaya.
