1. Inkurikizi z'uburebure bw'amapine
Uko urugero rugenda rurakura, ni ko n’uguhinduka kw’ibarabara ku bijanye n’ugukorana n’isi, kandi ubushobozi bwo guhangana n’uguhungabana buterwa n’ugutakaza umuvuduko w’amaraso buzotuma haba ugutera imbere kw’ibara ry’agahama. Ivyitegererezo vy’ibisigazwa ntibituma ubushuhe bw’amapine busenyuka, ku buryo ubushuhe bw’amapine buduga ningoga, kandi imizi y’ivyo bishushanyo yoroshe gutabura no kugwa kubera igihano gikomeye. Ivyitegererezo vy'imbere y'igihe ntibigira ico bikoze gusa ku kubika kwayo no kuyakuramwo amazi, kandi birashobora gutera ingorane "guca mu mazi", ariko kandi bituma amapine y'umuco ageragezwa n'umuco vyoroshe gunyerera, ivyo bikaba bituma ubushobozi bw'imodoka twavuze haruguru burushiriza kuba bubi.
2. Ico kigereranyo kiraremereye cane canke kiraremereye cane.
Ku bw’ivyo, rero, akarorero k’ikigereranyo cane canke gakomeye cane si vyiza. Itegeko ry’intumbero ni uko iyo nzira izoca iba ntoyi cane. Kugira ngo ibihugu kw’isi yose bibe vyiza, ibihugu kw’isi yose vyashizeho amabwirizwa atomoye ku bijanye n’ingene amapine yambara. Kandi urupfu rw'igipfunsi ikimenyetso c'imburi y'imburi "" canke ( na) "TWI" mu congereza ku bice vyinshi bingana ku ruhande rw'urutugu rw'amapine. Iyo urugendo rwo kwambara rwo ku ruhande rw’ibarabara rw’ibarabara ruri nk’iminota 1,6 (1/16 inch) gushika hasi y’uruzitiro rw’ibara, igishushanyo kiri ku kimenyetso carasobanuwe, rero umurongo w’umuco w’umuco ugaragara kugira ngo umushoferi aburire ko igihe c’uko amapine ashobora gusubirizwa