This model follows basic prototype engineering practice in that the side trusses carry the load. A test model carried a load of 20 pounds concentrated in the center of the span, with only a 1/32 inch downward deflection, and no damage. This is many times the load your model will have to bear when even the largest locomotives crosses the bridge. These are VERY STRONG structures.
The Howe Truss Bridge first designed and built in 1840 by William Howe, was the first successful truss construction of both wood and metal. The new design of this bridge helped to span greater distances and sped the development of the railroad. It soon became the most common type of timber bridge and has given the bridge users of America over 100 years of satisfactory service.
This all wood, intricate looking construction, is made easier for you with specially designed parts, full size templates, and step-by-step instructions. Parts are bundled and bagged for quick and easy identification. Special features of this model are the many detail parts including 28 bolt plates, 32 separate nut-washers, 8 tension plates, and 66 tie rods. Sufficient bridge ties are included in the kit. All of the wood parts are precision cut to give the truss a realistic and quality appearance. The Truss Bridge, when completed, measures 14-9/16 inches long by 3-1/8 inches wide.
