Iibhokisi zesiphambuka ezinobungqina bokudubula zibekwe ngokweendidi ngokususela kubungakanani bemijelo yazo yombhobho, ukusuka kwi 1/2 intshi ukuya 3 intshi. Oku kuquka ubukhulu obunje 1/2 intshi, 3/4 intshi, 1 intshi, 1.2 intshi, 1.5 intshi, 2 intshi, 2.5 intshi, kwaye 3 intshi. Ngaphaya koko, Ezi bhokisi zejunction ziza kwi-10 yeeNgcaciso eziKhethekileyo, nganye ilungele iimfuno ezahlukeneyo zokufaka:
1. Chwetheza a: Gijima ngqo – Ilungele ukunxibelelana ngokulayishi.
2. Chwetheza b: Ngqo kwiflethi – Yenzelwe ngokuthe tye-ngentambo yentambo.
3. Chwethe c: I-T-Pass Shest – Ilungele iindlela zokuhamba nge-t.
4. Chwetheza d: Ukuwela iflethi – Isetyenziselwa ukwenza i-cunsment yendawo.
5. Chwetheza e: I-elbow drive iflethi – Ilungele ukugoba i-angle ekunene.
6. Chwetheza f: Ukuqhuba ngokuthe ngqo – Ilungiselelwe ukunxibelelana okuthe nkqo.
7. Chwetheza g: Thumela ngqo ukuxhonywa – QHUBEKELA NGOKUQHELEKILEYO-NGOKUFANELEKILEYO KWI-COB YOKUGQIBELA.
8. Chwetheza h: I-T-Pass Hing – Ilungele i-t-terstications ye-t.
9. Uhlobo I: Ukuwela ukuwela – Yenzelwe ukuwela iziqwengana zendlela yokumiswa.
10. Chwetheza j: I-elbow idlulile – Eyona nto ilungileyo ye-angle ijika kwi-Homedies.
Iqela ngalinye kwezi ntlobo linikezelwe ukubonelela ngonxibelelwano olungenamthungo kwaye olukhuselekileyo ngokwahlukeneyo qhuma iindawo ezingqongileyo, Ukuqinisekisa ukhuseleko kunye nokuthembeka kwi-Payardes Useto lweShishini leShishini.