Sentinel Structures, Inc. manufactures structural glued laminated timber, mass timber, at Peshtigo, Wisconsin. This is site of the original timber laminating facility in North America, established in 1934. This is experience with no equal. All products are custom made for the particular application – from straight beams and truss members to curved arches; the great and compass engineered timbers for use in roof and floor construction in buildings; electric utility towers; decorative lighting standards; wooden boat and ship framing; highway noise barriers; pedestrian and vehicle bridges; sculptures; and many other items.