Abstract: Systems and methods for deploying a firefighting water reservoir, including foldable frame assemblies having vertical structural members and horizontal structural members configured to support a liner, are provided. The liner can be adapted to contain water. The horizontal structural members comprise a hinge adapted and arranged for folding and unfolding the foldable frame. The hinge comprises a hinge element that substantially prevents a user's appendage or the liner from becoming pinched during deployment or folding of the foldable frame assembly.