A support member for mounting photovoltaic modules on a support surface and a mounting system including the same are disclosed herein. The support member may comprise a body portion that includes a ballast receiving portion for accommodating one or more ballasts, the body portion further including a first support portion with a first surface and a second support portion with a second surface, the first support portion being spaced apart from the second support portion by the ballast receiving portion. The support member is configured to bridge a plurality of rows of photovoltaic modules, the first surface of the support member configured to support one or more photovoltaic modules in a first row of the plurality of rows of photovoltaic modules, and the second surface of the support member configured to support one or more photovoltaic modules in a second row of the plurality of rows of photovoltaic modules.