Ivyuma vy’inanga ni ikintu gisanzwe cane co gushingira intahe mu bibanza bigumye. Igikorwa cavyo nyamukuru ni ugufatanya neza amabuye y’agaciro canke amasahani y’icuma n’igice c’ishimikiro biciye ku nanga zishizwe muri beton canke mu bindi bintu, ivyo bikaba bituma inyubakwa iguma ihagaze neza kandi ikagira umutekano.
Ivyuma bifatanya nanga birangwa n’ubushobozi bwavyo bwo gufatanya nanga no kwikorera, bishobora kwihanganira inguvu nyinshi z’ugukomera n’iz’ugukemura, ivyo bikaba bituma bibereye ibikorwa bisaba inguvu nyinshi. Ariko rero, amabouti y’ivyuma asaba amahera menshi n’ubuhinga bwo kuyakora, asaba amabouti ashizwemwo imbere y’igihe, kandi ashobora kwonona cane umushinge w’inyubako. Muri rusangi zirabereye inyubakwa ndende-n’imigambi yihariye ihuye n’ibisabwa bimwebimwe.
