Maaddaama ay tahay mid ka mid ah kuwa ugu tartan adag shirkadaha, kuraasta birta tuubbada birta ee HDG ayaa loogu talagalay joojinta tuubooyinka halkaasoo looga baahan yahay dhaq-dhaqaaq dheer iyo toosin toosan. Waxayna heleen sumcad weyn adduunka, gaar ahaan Waqooyiga Ameerika, Koonfurta Ameerika, Bariga Dhexe iyo Aasiya. Sidoo kale, waxaa jira daaweyn dusha sare ah oo aad dooratay: Zinc-plated, Hot Diated Galvanized, epoxy iyo Green galvanized finish, si loo daboolo baahiyahaaga heerarka kala duwan 'anticorrosion.