1. Chitarisiko checheni chinoita sechinokambaira chetangi rine majoini akati wandei. Majoini echinokambaira anotenderedzwa zvakasununguka.
2. Cheni dzakafanana dzine urefu hwemukati nekunze uye kukwirira kwakafanana asi kukwirira kwemukati ne radius yekukombama R zvinogona kugadzirwa zvichienderana nezvinodiwa zvakasiyana.
3. Chisungo checheni cheyuniti chine ndiro yecheni kubva kuruboshwe kuenda kurudyi uye chifukidziro chinokwira kumusoro. Chisungo checheni chega chega chinogona kuvhurwa kuitira kuti zvive nyore kuungana nekuputsa pasina kuputira shinda. Tambo, mapaipi emafuta nemapaipi egasi zvinogona kuiswa mucheni yekudhonza mushure mekunge ndiro yecheni yavhurwa.
| Muenzaniso | H×W yemukati | HXW yekunze | Kurira kwenzwi | Nharaunda Yakakotama | Kurira kwenzwi | Hurefu husingatsigirwi | Maitiro | ||
| B1 | B2 | B3 | |||||||
| TZ-18.18 | 18x18 | 23x31 | 12 | 6.5 | 6 | 28.38.48 | 30 | 1.5 | Zvivharo zvakavharirwa nehafu uye zvepasi zvinogona kuvhurwa |
| TZ-18.25 | 18x25 | 23x38 | 19.5 | 6 | 6 | 28.38.48 | 30 | 1.5 | |
| TZ-18.38 | 18x38 | 23x51 | 25 | 6 | 6 | 28.38.48 | 30 | 1.5 | |
| TZ-18.50 | 18x50 | 23x63 | 30 | 7 | 7 | 28.38.48 | 30 | 1.5 | |
Pakugadzira macheni etambo, zvakakosha kutanga nekusarudza rudzi rwecheni/mutakuri uye chechipiri rudzi rwetambo dzinofanira kuiswa pacheni, zvichiteverwa nekurongeka kwetambo dziri mucheni. Vagadziri vazhinji vecheni huru vane magwaro anotsanangura mashandisirwo ekusarudza nekugadzika macheni avo kuti vave nechokwadi chekuti cheni yacho inogara kwenguva refu uye zviri mukati mayo. Kutevedzera nhungamiro idzodzo kwaizovimbisa kuti hupenyu hunogara kwenguva yakareba kupfuura hwecheni yacho, asi zvakare kwaizogadzira cheni dzakafara zvakawandisa dzatisingakwanise kuzviisa muzvishandiso zvedu.