Zida zambiri zamasiku ano zosakaniza phula ndi zobiriwira komanso zachilengedwe, ndipo pansi-silo phula losakaniza ndi loyimira. Kaya ndi kapangidwe kake kapena kachipangizo kaukadaulo, zimatengera kusungitsa mphamvu ndi kuteteza chilengedwe monga mfundo yayikulu.

Chomera chosakaniza phula chapansi-silo chimatenga chotolera thumba lachikwama choyamba ndi dongosolo lachiwiri la inertial fumbi lotolera, komanso kapangidwe kanyumba kopanda fumbi, komwe kumatha kuwongolera bwino kutulutsa fumbi ndikuchita bwino pamagetsi. kuchepetsa ndi kuchepetsa umuna. Panthawi imodzimodziyo, kutengera miyezo yapadziko lonse lapansi yoteteza chilengedwe, zida izi sizimangokwaniritsa miyezo yotulutsa fumbi, komanso zimakwaniritsa miyezo yotulutsa asidi, kuwongolera phokoso, ndi zina zambiri.
Kuphatikiza apo, mawonekedwe ake apadera ophatikizira masamba ndi makina apadera oyendetsa magetsi amachititsa kusakanikirana kodalirika komanso kotetezeka; kapangidwe ka modular kumathandizira kukonza malire a kukhazikitsa zida ndi mayendedwe; okonzeka ndi pansi-wokwera, symmetrical dongosolo la yomalizidwa mankhwala silo, Ikhoza bwino kupulumutsa malo ntchito ndi kuchepetsa mlingo kulephera kwa zipangizo.