1.Reinforced bead design waxay bixisaa awood loading super, taas oo ku haboon masaafo gaaban on macdanta iyo wadada isku dhafan.
2.Transverse waaweyn naqshadeynta naqshadeynta blocks waxay bixisaa xajin dhulka aad u fiican iyo awood fuulid.
3. Bixi iska caabinta jeexjeexa iyo daloolinta waddada adag, taas oo ka dhigaysa nolosha taayirka wakhti dheer.