Modular with quick assembly. Starting section assembly includes: 2 posts, 2 trusses, 2 rails and hardware. Add-on section assembly includes: 1 post, 1 truss, 2 rails and hardware. Galvanized rails and post | Electroplated powder coated truss (Aquence 930 Coating). Ideal for large commercial and utility-scale installations. Rugged, weather-resistant designs. 20-year guarantee against mechanical failure (breakage) of the frame construction.