Our kit docks consist of a modular 12" angle iron box trusses, hot dipped galvanized substructure. Standard sizes are 2', 3' or 4' wide & 4' to 20' in length, wIth 4' cross sections. All frames are bolted together using 1/2" galvanized bolts. Superstructure consists of 2 1/2" galvanized square tubing and 8"galvanized Z purlins. All dock components are delivered pre-drilled and test fitted to ensure easy installation.