Abstract: A railing system constructed primarily of high-strength, high-durability molded fiberglass. There are upper and lower box-section rail members which are joined by vertically extending tubular uprights, with a plastic stringer rod being threaded through bores in the ends of the uprights to lock the members together. Socket members are provided for mounting the ends of the rail members to a vertical support surface, and strut members are provided for installation between the lower rail member and the underlying floor/deck surface. The components are modular for ease of assembly, and the use of plastic materials not only obviates maintenance requirements but also enables the assembly to be cut to length and installed using conventional woodworking saws and other simple, readily available hand tools.