Find different types of main gates made of iron, steel, aluminium and other metals with grills Choose from thousands of designs and request quote to enquire about their price list and cost details Generally, rates of main gates range between 0/sqft to 1500/sqftBlack Marble Desk Plates These desk name plates have a deep black color which contrast with the beautiful white lines of pure black marble Genuine Black Marble with natural white swirls and veins Available in 10 inches Steel and Aluminum Structural Plate Design Guide 4 Typical Design Steps STRUCTURE SHAPE GEOMETRY Shapes Span x Rise Common Uses Steel Aluminum Trade Name Round 5' to 50'6" Culverts, storm sewers, aggregate tunnels, vehicular and pedestrian tunnels and stream enclosures Functions well in all applications, but especially in those with