Abstract: A support foot for a modular safety rail system comprises a base plate having upper and lower surfaces and an outer periphery, a plurality of sockets positioned inwards of the periphery and extending from the upper surface for location of a vertical post, a plurality of webs provided at the upper surface and each extending from a socket towards the periphery, each web extending from the base plate to an upper edge surface of the web, the lower surface of the base plate having at least one recess whereby when one support foot is stacked on top of another at least one of a distal end of a socket and an upper edge of a web engages the recess to prevent lateral movement of the feet, and the upper edge surface of each web being able to support the lower surface of a superimposed support foot to resist toppling.