Amagwiritsidwa ntchito kwambiri mu petrochemical, magetsi opangira magetsi, malo opangira madzi, zimbudzi zamadzi, zomangamanga zamatauni, uinjiniya waukhondo ndi magawo ena a nsanja, ma walkways, milatho ya trestle, zivundikiro za ngalande, zovundikira manhole, makwerero, mipanda, mipanda, etc.