Galvalum which is an iron-based material with a layer of aluminum and zinc. Because it is made from iron, galvalum is very suitable for use as a structural material, especially as a sturdy and strong roof truss. Galvalum which functions as an outdoor roofing material, gutters, fences and other necessities including large buildings or houses. Galvalum is not like wood which, when exposed to fire, will turn into charcoal (crushed), galvalum has properties that are more resistant to fire so that it reduces the risk of collapse due to fire.