Unlike in house construction this type of truss is not used for long spans in bridges because other styles are more suitable.
The queen post roof truss is suitable for.
Queen post roofs queen post trusses are used for spans over 30 feet and contain two perpendiculars to brace up the tie beam spanning the walls.
A queen post is a tension member in a truss that can span longer openings than a king post truss.
This truss is made from a variety of materials such as timber or steel.
An important thing to note is the way in which it differs from a king post truss.
It does not put weight on the centre of the main tie beam as the king post truss.
The queen post truss is designed to be a very reliable simple and versatile type of roof truss that you can use at any given time.
Even though it is a tension member rather than a compression member they are commonly still called a post.
Day bridge in southwestern pennsylvania.
Roof trusses actually come in a few variations but the queen post truss follows the familiar triangular shape.
The queen post truss is found suitable for spans 6 m to 9 m.
King post roof truss the king post truss consists following components.
These trusses are convenient for spans 12 m to 18 m.
Queen post truss is used when there is a need to cover large areas.
The queen post truss is simpler and lighter in weight.
In an uncovered bridge the trusses are visible usually as side rails.
A queen post is often confused with a queen strut one of two compression members in roof framing which do not form a truss in the engineering sense.
For ordinary buildings the fink type truss is found to be very satisfactory.
With a king post roof a single vertical post extends from top to bottom providing support.
Queen post trusses are used in bridge design too.
It offers a good span around 10m and it has a simple design which makes it perfect for a wide range of establishments.
This makes it suitable for a wider range of buildings.
It is a common truss style for wooden covered bridges in which it supports the covered roof.
379 is a queen post truss for a 32 feet span.