Discover the Ten Types of Roof Trusses for Stronger Homes

The choice of roof truss design affects structural integrity, attic space, cost, and installation speed. This article breaks down ten common types of roof trusses, explaining how each shape supports loads, where they’re typically used, and the pros and cons. Understanding these options helps homeowners and builders select the right truss for framing, roofing, and long-term durability.

King Post Truss

The King Post Truss is one of the simplest and oldest truss designs, featuring a central vertical member (king post) connected to the base ties and the ridge. It is ideal for short to medium spans where simplicity and economy are priorities. Key advantages include easy fabrication, low material cost, and quick installation. However, its limited span capability makes it less suitable for larger structures unless scaled up or combined with additional members.

Queen Post Truss

The Queen Post Truss adds a second vertical post, allowing longer spans than the King Post without significantly increasing weight. This design provides a balanced appearance and is common in traditional timber framing. Best use cases include medium-span residential roofs and barns where clear attic space is desired. While more complex than the king post, it remains economical and versatile.

Howe Truss

The Howe Truss uses diagonal compression members and vertical tension members, creating a robust, load-bearing system. It’s widely used in ranch and barn constructions and can span long distances with relatively lightweight components. Strengths include excellent rigidity under wind and snow loads and ease of prefabrication. A potential drawback is higher material cost compared to simpler triangles, but durability often offsets this in larger roofs.

Pratt Truss

The Pratt Truss features diagonals that slope downward toward the center, with vertical members in compression. It’s favored for industrial and warehouse applications due to its efficient material usage and strong load distribution. Common benefits are good spanning capability, ease of shop fabrication, and straightforward on-site assembly. It’s well-suited for long, open interior spaces where clear spans matter.

Warren Truss

The Warren Truss uses equilateral or isosceles triangles without verticals, distributing loads evenly through a series of repetitive triangles. This results in a lighter, economical frame with a modern appearance. Ideal scenarios include medium to long spans where uniform member lengths simplify fabrication. It offers predictable performance and reduced material waste during manufacturing.

Fink Truss

The Fink Truss is a common residential choice, distinguished by its diagonal web members forming a pattern that provides strong support for steep roofs. It’s well-suited for attic spaces and ceiling trusses in homes. Advantages include efficient load transfer, ease of prefabrication, and compatibility with various roofing materials. The design can limit interior headroom in certain configurations, which should be considered in space planning.

Gambrel Truss

The Gambrel Truss is recognized by its double-sloped lower chords, creating a Dutch-gable profile that maximizes attic space. This style is often used in barns and historic-style homes where vertical space is valuable. Key benefit is substantial storage area above the living space. Drawbacks include more complex fabrication and higher costs, though the extra headroom can justify the investment in appropriate projects.

Scissor Truss

Scissor Trusses are designed to create a vaulted ceiling effect by crossing the rafters and forming an open, angled ceiling. They provide dramatic interior height without sacrificing roof support. Best fit for rooms requiring a sense of openness, such as living areas and foyers. They may require careful insulation planning to manage thermal performance and moisture at the ceiling plane.

Hip Truss

A Hip Truss supports a hip roof, where all roof edges slope toward the walls. This design delivers superior wind resistance and a compact footprint, often used in areas with high wind or snow exposure. Key benefits include enhanced stability and a clean exterior silhouette. Limitations include more intricate connections and potentially higher fabrication costs due to the irregular geometry at corners.

Burr Truss

The Burr Truss, a variant of the Howe family, uses multiple panels with intersecting diagonals to maximize load distribution across longer spans. It is frequently employed in larger homes and public buildings requiring robust support. Pros include excellent load handling and long-span capability. The trade-off is increased complexity in design, manufacturing, and on-site assembly, which can impact project timelines and cost.

Practical considerations When Choosing A Roof Truss

Color, texture, and architectural style should align with structural needs. Key considerations include span length, roof pitch, attic space requirements, wind and snow loads, insulation and ventilation, and budget. Consulting a licensed structural engineer ensures that a chosen truss type adheres to local codes and performance standards. Modern techniques often involve prefabricated trusses that improve accuracy, reduce on-site waste, and streamline construction timelines.