Parallel Chord Truss
Parallel chord trusses are also known as girder trusses and provide roofing elements with much needed support through their rectangular shape. They are a budget-friendly option in comparison to most other trusses that carry the same load and purpose. They are recognizable by their “webbing” and though they may look similar to other trusses, they are used in projects that need more support.
What is a parallel chord truss?
A parallel chord truss is made up of two chords, one on top and one on the bottom, separated by webs—diagonal and vertical pieces that span the entire length of the truss.
What Is a Parallel Chord Truss Used For?
The purpose of a parallel chord roof truss is to support other structural elements through its ability to carry a heavier load than other structural trusses. The additional plates and posts that make up the web between the two chords are what provide the extra strength that the parallel chord truss is known for.
These girder trusses are most often used to support traditional trusses, rafters, and purlins. Because of their design, they can span a much longer distance than other trusses without the need for central support posts.
Interested in Parallel Chord Trusses?
Yellowstone Timber Frame has extensive experience building parallel chord trusses, providing valuable knowledge and expertise on the subject. We can recommend, estimate, and craft girder trusses for your project with ease and reliability. We’re capable of building standard or fully customized trusses. Contact us today and find out what Yellowstone Timber Frame can do for you.
What Are the Advantages of Parallel Chord Trusses?
strength and durability
One of the largest advantages of using a parallel chord roof truss. They are made to support more weight without the need fora load-bearing wall or beam.
extra support
Because of their rectangular form, parallel chord trusses are perfect for creating a second floor. Though they are used as an inexpensive alternative for roof support, they have an alternative purpose as floor/ceiling support on non-ground levels.
length span
Due to their ability to span across a wide distance without the need for support posts, these girder trusses also act as great solutions for building large rooms.
customizable
Parallel chord trusses can be customized to the user’s liking.This customization is with the webbing, choosing how many pieces are used in their respective directions. This offers some level of aesthetics which may be important to the owner if the truss is permanently exposed.
Parallel Chord Truss Span Chart
Below you can find a typical industry chart detailing the depth in inches in relation to the size of the top and bottom chords and the relative span for each for parallel chord trusses.
Common Types of Parallel Chord Trusses
There are several different types of parallel chord trusses that range from purpose to aesthetics. These include standard parallel chord roof trusses, vaulted parallel chord trusses, and parallel scissor chord trusses.
Yellowstone Timber Frame can help you choose the one that best suits your needs and even designs custom parallel chord trusses for you to create your dream project.
Parallel chord roof truss
Parallel chord roof trusses are best for people looking for an inexpensive form of support that spans across a wide area. These are ideal for creating a second floor due to their rectangular shape.
vaulted parallel chord truss
When creating a vaulted roof or ceiling, this is the best option. Vaulted parallel chord trusses have sloping chords with identical pitches on the top and bottom that still require no need for support posts.
parallel chord scissor truss
When creating low slanted roofs that span across a wide area, a parallel chord scissor truss is the best solution. It maintains support and resistance against rain or snow while maintaining an open space underneath.
Frequently Asked Questions About Parallel Chord Trusses
what is a chord?
The “chord” part of parallel chord truss refers to the upper and lower beams of wood. They are connected through a webbing of vertical and diagonal elements.
How far do parallel chord trusses span with no support?
These trusses can span up to around 90 ft with no additional support, albeit with difficulties. The further the expanse, the harder it is to secure.
Why are parallel chord trusses inexpensive?
These types of trusses generally require fewer materials to make and even less is needed as support. The lesser materials equate to a less expensive build.
Where are vaulted parallel chord trusses used?
Buildings that require a lot of interior space with no support posts inside use vaulted parallel chord trusses. These include churches, warehouses, convention centers, and homes.
Why Choose Yellowstone Timber Frame for Your Parallel Chord Truss?
Yellowstone Timber Frame has extensive experience building parallel chord trusses, providing valuable knowledge and expertise on the subject. We can recommend, estimate, and craft girder trusses for your project with ease and reliability. We’re capable of building standard or fully customized trusses. Contact us today and find out what Yellowstone Timber Frame can do for you.