Abstract: A system for tension bracing a series of spaced girders forming a part of a bridge which includes a lateral member extending across the tops of the series of spaced girders. A first end of the lateral member is attached to a first girder in the series of spaced girders. A second end of the lateral member engages an adjustable mount, which is affixed to the last girder in the series of spaced girders. The adjustable mount adjusts the tension in the lateral member and, once a predetermined tension is reached, the lateral member is affixed to the intermediate girders in the series of spaced girders.