What are the types of truss bridges?

What are the types of truss bridges?

The four most basic categories in the truss bridge arena are the Warren, Pratt, Howe and K Truss. Each utilises the basic ‘triangle’ design, characteristic of the truss bridge, however, each varies slightly in the way they distribute compression and tension.

What type of bridge is a truss bridge?

A truss bridge is a bridge whose load-bearing superstructure is composed of a truss, a structure of connected elements, usually forming triangular units. The connected elements (typically straight) may be stressed from tension, compression, or sometimes both in response to dynamic loads.

What are five types of truss bridges?

What are the Types of Truss Structures?

• Pratt Truss.
• Warren Truss.
• K Truss.
• Howe Truss.
• Fink Truss.
• Gambrel Truss.

What was the first truss bridge built?

lattice truss
In 1820, Ithiel Town’s lattice truss design became the first patented truss bridge design. It required little metal to build, which made it easy to construct.

What are the types of truss?

Most Common Types of Roof Trusses

• Gable Trusses. A variety of the trusses shown above fit into the common or gable truss category, including the King Post, Queen Post, Howe, and Double Howe trusses.
• Hip Truss.
• Scissor Roof Truss.
• Attic Truss.
• Mono Truss.
• North Light Roof Truss.
• Flat Truss.
• Gambrel Truss.

What is truss and types of truss?

Simple truss – indicates a single triangular truss. These trusses are most often used as the roof trusses. Planar truss – as the name implies it is a two dimensional truss. Space frame truss – Contrast to planar truss, the members and the nodes are located in the three dimensional space. …

How truss bridges are built?

In a truss bridge, two long – usually straight members known as chords – form the top and bottom; they are connected by a web of vertical posts and diagonals. The bridge is supported at the ends by abutments and sometimes in the middle by piers. In theory, a truss bridge contained no redundant members.

What is the best type of truss bridge?

In this experiment we have tested which type of truss bridge is the strongest, yet uses the least amount of material. Two of the most used truss bridges are of the Pratt and Howe design. Through our experiment it was found that the bridge design that minimized the maximum compression force was the Howe Bridge.

Who designs truss bridges?

Out of a large number of builders, Timothy Palmer (1751-1821), Louis Wernwag (1770-1843), and Theodore Burr (1771-1822) led the development of wooden truss bridge construction in the United States (Steinman and Watson 1957:117-120).

Why is truss used on bridges?

On truss bridges, a tension member is subject to forces that pull outward at its ends. A properly designed and built truss will distribute stresses throughout its structure, allowing the bridge to safely support its own weight, the weight of vehicles crossing it, and wind loads.

What are truss bridges used for?

Trusses are popular for bridge building because they use a relatively small amount of material for the amount of weight they can support. They commonly are used in covered bridges, railroad bridges, and military bridges.

What are the 4 types of trusses?

Here are a few of the most common types of roof trusses that might be perfect for your build:

• Gable Trusses.
• Hip Truss.
• Scissor Roof Truss.
• Attic Truss.
• Mono Truss.
• North Light Roof Truss.
• Flat Truss.
• Gambrel Truss.

What is the strongest type of truss bridge?

warren-truss design will be the strongest because it is the simplest design and spreads the weight of the load evenly over the bridge. Methods/Materials Popsicle sticks and glue were used to build 3 different bridge designs: Pratt truss, Warren truss, and K truss. 5 identical models of each design were built. All 15 bridge were the same length.

What are the different types of bridge designs?

Four basic types of bridge design exist, according to Professor Joseph MacDonnell of Fairfield University : beam (also known as truss), arch, suspension and cantilever. The pontoon bridge, a well-known type of temporary bridge, is used to cross rivers and bodies of water; the weight of the bridge is supported on floating structures called pontoons.

What are some famous truss bridges?

The approach spans of the Sydney harbor are made in the Warren truss style with mild steel. Each span weighs around 1,200 tons. Other famous Warren truss bridges are the Brookport Bridge (USA), Harteloire Bridge (France), Koblenz-Felsenau Footbridge (Switzerland), Nishiki Bridge (Japan), and Pipeline Bridge No.6 (Germany).

What are the advantages and disadvantages of truss bridges?

It Takes so Much Space: One major advantage of truss bridge is that it requires more space in building and sometimes the main cause of accidents. Heavy: This is another drawback of truss bridge, aside from being heavy; building this bridge is costly as well as requires time and money to upkeep.