Ku hlayela ka swirhendzevutana swa khonkhriti

Ku hlayiwa ka vholumo ya switirhisiwa swo endla swirhendzevutani swa khonkhriti

Boxa swipimelo hi timilimitara

D - Diameter ya ring ya khonkhriti
A - Ku tiya ka rirhangu
H - Ku leha

Nongonoko lowu wu endleriwe ku hlayela switirhisiwa ni mpimo wa swirhendzevutana swa khonkhriti.
Volume ya concrete, volume yale ndzeni na diameter ya ring, ti dimensions na ndzhawu ya reinforcing mesh swa hlayeriwa.
Ti ring ta khonkhriti ti tirhisiwa ku aka swihlovo na mathangi ya septic.