The trusses in roofs are typically comprised of a horizontal beam and two rafters that join to form a triangle. In addition to providing structural support, they can increase the visual appeal of home interiors. If you are planning a new roof installation knowing the different types of wood trusses can help you make functional and aesthetic decisions. Here are several popular configurations and their advantages.
This configuration features two vertical posts that extend from a central beam and reach to the midpoint of each rafter. This is one of the strongest varieties because it provides additional support to the rafters, which is why it is commonly used on wider roofs. This can help prevent sagging and protect the home from damage after a strong storm. Additionally, the open center between the posts can draw attention to large windows inside.
This option features a single, vertical post in the center of the beam that joins at the apex of two rafters. It includes two additional pieces of timber, known as struts, that extend from the base of the post and connect to the midpoint on each rafter, forming an angle. Since the struts reinforce the rafters, this configuration can support heavier roofing materials, such as slate and clay tiles. It also offers an eye-catching appearance and can function as a focal point in your interior design, especially if you have high ceilings.
The scissor configuration includes two beams that begin at the base of each rafter and join toward the top half of the opposite rafter. This forms an angle that has an appearance similar to the blades on a pair of scissors. Scissor trusses offer stability and support, making it easy for your roof company to change the slope of the roof and incorporate different designs. They also leave more open space toward the ceiling, which can make interiors feel airy and spacious.
The hammerbeam option includes two short beams that start at the base of each rafter with vertical struts on the ends. The tops of the struts join with an additional short beam that spans the upper portions of the rafters. This configuration allows you to build wider roofs without needing long, expensive pieces of timber. It has a dramatic appearance that calls to mind the look of a church or large hall.