When calculating the volume of material the main roof rafters, under the regime of type 2, the program does not include cut-out side gable. This is due to some difficulties in implementing the program.
Kuhesabu wakati kiasi ya nyenzo kuu paa rafters, chini ya utawala wa aina 2, haina mpango ni pamoja na kukatwa-nje upande Gable. Hii ni kutokana na baadhi ya matatizo katika utekelezaji wa mpango.