Ko dai mafi saukin rumbun baka guda daya, babban rumbun rumbun ajiya, dakin girkin hasken rana, koren fim mai dimbin yawa, ko gilashin gilasai da yawa, babban jarin da ya fi muhimmanci a aikin ginin shi ne firam din ginin. , wanda kuma shine mafi mahimmancin sashi mai ɗaukar kaya.