Abuur nooc ka mid ah weedhan ka sii adag Hogaanka ayaa inta badan la siiyaa dhererka 2 m iyo ballaca cabbirrada kala duwan.
Dabcan, nooc ka sii adag ee jumlada waa "Lead yimid waxaa inta badan la siiyaa dhererka 2 m iyo widths of tirada kala duwan, waxa kale oo ay timaadaa in profiles flat ama domed. "