Whether you are building an extension to your home or building a new home, you need the best possible roof trusses for your roof design installed in your home.
In architecture and structural engineering, a truss is a structure made up of one or more triangular units manufactured with straight members whose ends are connected at joints referred to as nodes.
Prefabricated Roof truss systems allow for almost any custom roof design and shape imaginable, allowing features such as cross gables and cathedral ceilings without being too expensive.
Each truss is individually engineered to ensure a strong, yet cost-effective, roof system.
In a previous article, we briefly discussed 7 of the most popular roof shapes. For each roof shape, different types of roof trusses are required for the roof structure.
In this article, we will give you a brief overview of the 24 most frequently used roof trusses.
Fink Trusses are the most common type of truss used in residential structures. These trusses provide support for the rafters and give the roof its rigidity.
Double Fink Truss
A double-fink truss can span more than 65% more (16.5m) longer than the possible span of a singular(10m) fink truss.
Bowstring trusses are similar to conventional "common trusses" except for the top chord, which is constructed in a parabolic design. Bowstring trusses resemble the arched shape of an archery bow. The curved top chord and the horizontal bottom chord intersect each other at both ends. Bowstring trusses are designed to span large distances, such as those required for the roof of an aircraft hanger or warehouse.
Queen Post Truss
Queen Post Trusses is designed to be a very reliable, simple and functional type of roof truss that you can use at any given time. It offers a span of around 10m and has a simple design which makes it perfect for a wide range of installations.
The Fan Truss offers a medium span of around 10 – 15m, which makes it ideal for most roofing projects.
This truss is used for the construction of low pitch and flat roofs. Flat trusses are constructed with two chords running parallel to each other and supported by reinforcing trusses in between the top and bottom chords.
Gable End Truss
Truss used at the ends of a gable roof. It has vertical members which are spaced to allow convenient attachment of the exterior wall sheathing.
King Post Truss
The King Post Truss spans up to 8m, which makes it perfect for multiple types of houses & roof designs.
A mono-pitched roof is a single-sloped roof surface, often not attached to another roof surface. This is in contrast to a dual-pitched roof, also known as a gabled roof, which is pitched in two different directions.
A Truss that is shortened in length but maintains the original profile.
Sloping Flat Truss
Sloping Flat Trusses are used to create vaulted ceilings, much like Inverted Trusses.
The Howe truss offers a very appealing design, with a wide span of up to 30m. This makes it versatile and ideal for many different roof shapes.
Double Howe Truss
The Double-Howe Truss can span nearly double the length of the single Howe truss and can span up to 18 meters.
A hip roof consists of two ends built up of flat top hip trusses in a step-down system. Common trusses are located between the two hip ends and the height of the hip trusses is decreased with each subsequent truss beyond the peak of the hip.
The Studio Truss slopes like a scissor truss but terminates in a vertical plane before reaching the end of the span.
Attic Trusses are designed to create a space for additional storage or living area while leaving the outward appearance of the shelter normal.
A Polynesian truss has a dual pitch top chord where the slope significantly increases from the heel to the peak.
Double Queen Post
The Double Queen Post, or Modified Queen Post, is a combination of a gable truss design and a hip truss design so that they can be installed in sections which would otherwise be too large.
A Piggy-Back Truss is a combination truss which utilizes a gable end truss over a hip truss so that the two can be, which can be transported or installed in sections when a single triangular truss is too large.
The Inverted Truss is, in fact, a Howe Truss turned upside down. This type can offer the interior space additional natural light and a vaulted ceiling in part of the space.
Scissor trusses are used almost entirely in building construction to support a pitched roof, where a sloping or raised ceiling surface is desired. Though Scissor Trusses do not need a bearing beam, they still have a load limit greater than many other types of trusses. Also, this type of truss increases the stability of the building.
Dual Pitch Truss
A dual pitch truss is a truss that has two different pitches on its top chord.
Valley trusses are used to form a valley in association with standard or special trusses (usually the only type of truss which does not have structural triangulation).
TechniStrut (Pty) Ltd offers a complete roofing supply solution. While our core business is the manufacturing of Timber Roof Trusses, we also supply Roof Sheeting, Roof Tiles, and all other roofing materials required to install a complete roof.
We not only service Johannesburg and Pretoria, but the whole Gauteng province & surrounds.