The truss features an interior web design fashioned like a W to provide the best strength-to-weight ratio for spans ranging from about 5m to around 14m, which covers the vast majority of household dwellings being built today. Fink Truss Bridge FAQS What is a fink truss?Ī fink truss is the most common type of truss used, especially on homes and pedestrian buildings. It is not as strong as traditional trusses, and it needs to be handled with care when building and erecting bridges.It is not a well-known type of truss in the United States, and it cannot use traditional methods of engineering.It relies on strong connections between the web members and cripples the ability to absorb forces as well as traditional trusses do.This makes them a risky choice for long-span roofs. Because it is made of smaller members, it is more delicate than steel or wrought iron trusses and cannot support roof loads for very long.Roof loads can be transferred to the wall plate thanks to the fink design. The Fink Truss is a simplified webbed truss design that offers the most cost-effective roof option for roof structures.It is better for the structural integrity when compared to Pratt trusses, especially in areas with high wind speeds.It is easy to assemble a Fink truss due to the smaller size of the members and there are fewer joints for them to fail while supporting a high roof as compared to other types of trusses.Prices of building homes with Fink trusses is lower than that of homes with traditional trusses, however, it needs more time to build and cut materials.Use for longer spans with high pitch roofs because many web members are fragmented to make shorter members.A Fink truss is the ideal choice for various architectural styles, allowing for a variety of roof lines while providing the necessary strength and stability.Fink Truss Bridge Advantages and Disadvantages Fink Truss Bridge Advantages Today, Fink design trusses are used for pedestrian bridges and as roof trusses in building construction in an inverted (upside down) form where the lower chord is present and a central upward projecting vertical element and linked diagonals provide the roofing bases. The finks truss provides a cost-effective and versatile roof solution with spans up to 14 meters and pitch ranges from 10° to 60°. The fink truss is the most commonly used truss in roof design due to its design versatility. The roof weight is totally transmitted to the wall plates for support.īy increasing or tripling the number of plies, the fink truss can also be utilized as a support for other trusses, as in a “ hip” roof. The web elements create a ‘W’ to offer a strong structure with good load carrying capacity. The “fink” is a simple webbed truss design that offers the most cost-effective roof solution. Fink Roof Truss BenefitsĪ fink roof truss is the most common type of truss, providing a simple, versatile, and cost-effective roofing solution. If the bridge deck is held along the bottom of the truss (called a through truss) or if a lightweight lower chord is provided, the many diagonal members emanating from the end post tops are used to identify the structure.Īn Inverted Fink Truss do not have a top chord and includes a bottom chord. When viewed from the side or below, the bridge has an unfinished saw-toothed appearance, making the design very easy to identify. Many Fink trusses lack a lower chord (the lowest horizontal member). These diagonal members extend to the bottom of the truss’s vertical members, with the longest diagonal extending to the center vertical member. The presence of many diagonal members extending down from the top of the end posts at various angles differentiates Fink Truss. These trusses support the rafters and offer rigidity to the roof. It is made up of many boards or steel bars that connect to form an intersection at the roof’s top angle. ![]() It is one of the most popular type of home building truss. At the time, it was the longest iron railroad bridge in the United States.īecause the web members of Fink trusses are fragmented to produce shorter members, they are employed for longer spans with high pitch roofs. It was made up of three 205-foot-long spans. The Baltimore and Ohio Railroad erected the first Fink Truss bridge in 1852 to over the Monongahela River at Fairmont, Virginia (now West Virginia). The Louisville and Nashville Company Company’s 1865 Annual Report of the President and Directors includes 29 Fink Truss bridges out of a total of 66 bridges on the railroad. Albert Fink created truss bridges for a number of American railways, most notably the Baltimore and Ohio and the Louisville and Nashville. Albert Fink patented the Fink Truss Bridge in 1854.
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