1. Ubude obungenasiphelo (ngokuqhelekileyo ubude)
Ubude bemibhobho yentsimbi engenamthungo ngokuqhelekileyo bubude obahlukeneyo, kwaye ezo zingaphakathi komgangatho womgangatho zibizwa ngokuba yi-variable lengths. Ubude berula obungenasiphelo bukwabizwa ngokuba bubude obuqhelekileyo (ngerula). Ngokomzekelo, ubude obuqhelekileyo be-159 * 4.5 umbhobho wensimbi ongenamthungo ngu-8 ukuya kwi-12.5

2. Ubude obuzinzileyo
Ukusika kwisayizi emiselweyo ngokweemfuno zomyalelo kuthiwa ubude obusisigxina. Xa zihanjiswa ngobude obusisigxina, umbhobho wensimbi ongenamthungo ohanjisiweyo kufuneka ube nobude obuchazwe ngumthengi kwisivumelwano somyalelo. Umzekelo, ukuba ikhontrakthi ichaza ukuba ukuhanjiswa kufuneka kube kubude obusisigxina be-6m, izixhobo ezizisiweyo kufuneka zonke zibe yi-6m ubude. Nantoni na emfutshane kune-6m okanye ubude kune-6m iya kuthathwa njengengafanelekanga. Nangona kunjalo, zonke izinto ezihanjiswayo azinakuba yi-6m ubude, ngoko ke kucacisiwe ukuba ukutenxa okuhle kuvumelekile, kodwa ukutenxa okungalunganga akuvumelekanga. (Xa ubude obumiselweyo bungekho mkhulu kune-6m, ukutenxa okuvumelekileyo kwandiswe ukuya kwi-+30mm; xa ubude obumiselweyo bukhulu kune-6m, ukutenxa okuvumelekileyo kwandiswe ukuya ku-+50mm)

3. Isiphindaphindi
Ezo zisikwe zibe ziziphindaphindo ezidityanisiweyo ngokobungakanani obumiselweyo obufunwa ngumyalelo zibizwa ngokuba ziirula ezimbini. Xa kuhanjiswa iimpahla ngobude obuninzi, ubude bombhobho wentsimbi ongenamthungo ohanjisiweyo kufuneka ube yinani elipheleleyo lokuphindaphinda ubude (okubizwa ngokuba bubude obunye) obucaciswe ngumthengi kwikhontrakthi yoku-odola (kunye nesaha). Umzekelo, ukuba umthengi ufuna ubude berula enye bube yi-2m kwikhontrakthi yomyalelo, ubude ke buya kuba yi-4m xa sisikwa kwirula ephindwe kabini, i-6m xa sisikwa kwirula ephindwe kathathu, kunye nesarha enye okanye ezimbini. yongezwa ngokulandelelanayo. Isixa se-saw kerf sichazwe kumgangatho. Xa isikali sihanjiswa, ukuphambuka okulungileyo kuphela kuvunyelwe, kwaye ukuphambuka okungalunganga akuvumelekanga.

4. Irula emfutshane
Irula onobude obungaphantsi komda osezantsi werula engapheliyo echazwe kumgangatho, kodwa ingekho ngaphantsi kobude obufutshane obuvunyelweyo, ibizwa ngokuba yirula emfutshane. Ngokomzekelo, umgangatho wepayipi yensimbi yokuthutha ulwelo uchaza ukuba ibhetshi nganye ivumelekile ukuba ibe ne-10% (ibalwe ngenani) yeepayipi zetsimbi ezifutshane kunye nobude be-2-4m. I-4m ngumda ongaphantsi wobude obungenasiphelo, kwaye ubude obufutshane obuvunyelwe yi-2m.