Kusankhidwa ndi kugwiritsa ntchito zida za nsomba zodyedwa sichokhazikika . pophatikizana ndi zida zam'madzi ndi zosokoneza zomwe tikupanga kuti tisankhe zoyandama zida
Kuswana kwakukulu ndi kudyetsa kuyenera kugwiritsa ntchito zingwe zoyandama za mphete {}} abakha, atsekwe ndioyenera kusankha nsomba zofunda kapena zida zotentha zamoto, ndipo kulimiritsa nyama zoyandama Zida {{{}} Zachuma, ndipo nyama zam'madzi zitha kudyetsedwa ndi zingwe zoyandama zoyandama kapena makina opukusira {{18}
Monga lamulo laling'ono, zida za nsomba zomwe zimadyedwa ndi mitundu iwiri yodyetsa, mpweya, umagawidwanso m'magulu a Stopler {{1} Kukhwimako Mitundu ya zida ilinso ndi maubwino osiyanasiyana ndi zoopsa {{9}