Ena ke moralo o theko e tlaase oa ho kenya matla a letsatsi o loketseng marulelo a ntlo.Ts'ehetso ea phanele ea letsatsi e entsoe ka aluminium le tšepe e sa hloekang, 'me sistimi e felletseng e na le likarolo tse tharo feela: li-hanger screws, li-bar, le li-fastening.E boima bo tlase ebile e khahleha, e ithorisa ka tšireletso e ikhethang ea mafome.