A support system includes a support frame and at least one modular leg assembly mounted to and supporting the support frame. The leg assembly includes a first leg member and a second leg member. The second leg member has a top-to-bottom length that is greater than the top-to-bottom length of the first leg member. The first and second leg members are connected individually or in combination to the support frame such that at least three leg heights are selectably provided. The leg members may each have a threaded connecting element extending therefrom for connecting the leg member to another leg member or to the support frame. The support system may be a mattress support frame. The at least one modular leg assembly may be a plurality of modular leg assemblies.
