Abstract: A security railing formed from plastics material pipe which is lightweight, low cost, and non-corrosive. The top railing and preferably the posts of the security railing are formed of double pipe construction comprising a first pipe and a second pipe inside the first pipe, the second pipe having an outside diameter related to the inside diameter of the first pipe. The first pipe is of plastics material and the second pipe preferably also is of plastics material. A lower railing utilizes a plastic pipe having the same outside diameter as the laminated top railing. T connectors and cross connectors are used at the joints between the upper and lower railings and the posts, and these T connectors and cross connectors are of the same outer dimension as the first pipe to give the railing a smooth contour.