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Illustrated Hanbook for Historic Commercial Buildings <br />34 <br />Roof <br />The roof consists of a flat wooden truss system embedded into the <br />exterior brick walls. Each truss spans the width of the building and <br />is supported not only by the brick masonry but also at mid-span by <br />two interior light-frame partition walls. Between each truss, wooden <br />cross braces provide lateral stability, reducing horizontal movement <br />and reinforcing the structural integrity of the roof. <br />Flat Wooden Truss Roof System <br />Top chord <br />Cross braces <br />Bearing <br />Web <br />Bottom <br />chord