Abstract: Embodiments disclosed include mattress assemblies and related components and methods employing magnetically-secured elongated edge-support members. The elongated edge-support members may be employed as side rails and end rails along the length and width of a mattress respectively to provide support along an edge of the mattress as a non-limiting example. Each elongated edge-support member may include elongated edge-support member sections aligned and secured by one or more magnets and magnetic attractive members ready to be assembled into the mattress. The elongated edge-support members may be converted to a second configuration easier to store and transport prior to inclusion in a mattress by removing the elongated edge-support member sections from alignment by pulling apart the one or more magnets and magnetic attractive members and pivoting the elongated edge-support member sections with respect to each other at the connection.