Book excerpt: The solution of the problem of a semi-infinite plate on an elastic foundation is presented. This problem occurs when a load is applied near the edge of a floating ice sheet. The equations are evaluated for an edge load, and the results given in graphical form for the following: (a) The maximum deflection which occurs at the edge under the load, (b) The moment which causes the initial cracking of the plate, (c) The distance from the edge that the circumferential crack will occur, (d) The moment that causes the circumferential crack. The same method of solution can be applied to an infinite strip on an elastic foundation with any combination of simple, rigid, or free support at the edges. (Author).