49. Iyo bwije kugeza bukeye cyangwa bitewe n’uko ibihe bimeze nk’igihe cy’ibihu cyangwa cy’imvura bitagishoboka kubona neza muri m 200, udutsiko twose tw’abanyamaguru nk’imperekerane cyangwa udutsiko tw’abanyeshuri bari ku murongo bayobowe n’umwarimu, iyo bagenda mu muhanda ku isonga hakaba hari abantu barenze umwe bagomba kugaragazwa kuburyo bukurikira :

50. Utuyira turi ku mpande z’umuhanda n’ inkengero zigiye hejuru biharirwa abanyamaguru mu bihe bikurikira:

51. Imburira zimurika zemerewe gukoreshwa kugirango bamenyeshe umuyobozi ko bagiye kumunyuraho aha hakurikira:

52. Uburemere ntarengwa bwemewe ntibushobora kurenga ½ cy’uburemere bw’ikinyabiziga gikurura nubw’umuyobozi kuri romoruki zikurikira :

53. Ibinyabiziga bifite ubugari bufite ibipimo bikurikira bigomba kugira amatara ndangaburumbarare :

54. Nta tara na rimwe cyangwa akagarurarumuri bishobora kuba bifunze ku buryo igice cyabyo cyo hasi cyane kimurika kitaba kiri hasi y’ibipimo bikurikira kuva ku butaka igihe ikinyabiziga kidapakiye :