What are the advantages of a Howe truss bridge?
Thus, because the diagonal members are longer, the Howe truss used less of the more expensive iron material. It made good use of the cheap wood which was readily available. For model bridges, we typically only use wood. Our compression and tension members are both made out of wood.
Why is it called a truss bridge?
Truss Bridge – Types, History, Facts and Design. Truss bridge is a type of bridge whose main element is a truss which is a structure of connected elements that form triangular units. Truss is used because it is a very rigid structure and it transfers the load from a single point to a much wider area.
What is the purpose of the truss bridge?
Given that a triangle cannot be distorted by stress, a truss gives a stable form capable of supporting considerable external loads over a large span. Trusses are popular for bridge building because they use a relatively small amount of material for the amount of weight they can support.
Why is the Howe bridge the strongest?
Truss bridges are extremely effective because they have a high strength to weight ratio. Two of the most used truss bridges are of the Pratt and Howe design. Introduction. Through our experiment it was found that the bridge design that minimized the maximum compression force was the Howe Bridge.
What is a truss bridge pros and cons?
A truss bridge requires high levels of ongoing maintenance. Truss bridges may provide high levels of support, but the additional components and connections of the bridge mean it requires high levels of maintenance as well. Every part of the bridge plays an important role in how the span functions.
What is the difference between Howe and Pratt truss?
The main differences are that the Pratt truss has no force on the ends and the compression members are vertical. The Howe truss has no force on the center and the tension members are vertical instead. – The Howe truss has no net force in the center, where the load will be placed.
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.
What are truss types?
There are two basic types of truss: The pitched truss, or common truss, is characterized by its triangular shape. The parallel chord truss, or flat truss, gets its name from its parallel top and bottom chords. It is often used for floor construction.