Hariho ubwoko butandukanye bwo gufunga amasahani, buri kimwe gifite umwihariko wacyo hamwe na porogaramu. Bumwe mubwoko bukunze kuboneka harimo ibyapa bifunga neza, ibyapa bifunze, ibyapa bifunga T-plaque, ibyapa bifunga L-plaque, ibyapa bifunga intera, ibyapa bifunga hafi nibindi.