Abstract: An assembly and method for testing the fire performance of sheet piling sections which includes: a first wall formed from sheet piling sections; a second wall substantially parallel to the first wall; a base plate; and a pair of end sections extending between the opposing ends of the two walls. The first and second walls and the end sections are attached to, and extend upwardly from, the base plate to form a cavity, which can be filled with materials. The assembly also includes two top sections, which are attached to the first and second walls and joined together by at least one connector. The sheet piling sections of the first wall are exposed to a heat source to certify compliance with fire codes and regulations.