roof trusses

Roofing trusses are the girders, cantilevers, and scissor posts that support the roof. They are commonly used to support roofs, but can also be used for other applications. They are made from wood or metal and can be used in both new construction and renovation projects.


Using cantilever roof trusses is a great way to increase the space you have outside of your home. You can also improve the look of your flat roof. There are different types of cantilever trusses that you can choose from, depending on your needs.

Cantilever trusses can support spans up to three-quarters of the length of the beam. However, it’s important to remember that the longer the overhang, the more weight it will need to support. This can cause stress on the building. So, it’s best to work with a qualified engineer to ensure that your cantilever meets the building code.

Generally, cantilever trusses are built to create second floors in buildings. They are also used for bridges, balconies, and walls. They can be used in conjunction with other types of trusses. This gives you the flexibility to create a second floor without having to build a floor system.

The cantilever is usually built into the wall, but it can also be suspended in mid-air. The truss is usually supported at one end and then a supporting post extends outward. The support post is usually supported by angle bars. The bars are connected with rivets.

The cantilever is usually about 1/4 to 1/3 of the centre span. It transfers the load to the supporting post at the other end. However, it’s not as stable as the rest of the roof. This is because the truss is not as flexible as other types of trusses.

If the truss is overhanging the roof, you may have to install a support beam at the end of the truss. This will help keep the truss from collapsing. However, it’s important to remember to check the condition of the fasteners before placing the beam on the roof. If you are working in an area that is susceptible to high winds, avoid installing a cantilever overhang.

In cold climates, you may have to consider the weight of snow on the cantilever. If you want to install solar panels, you will need more room on one side of the roof. This can be done with a dual pitch truss. You can also use raised tie trusses to create vaulted ceilings.


Having a scissor roof truss is a great way to get that vaulted ceiling without having to spend lots of money on extra supports. It’s easy to install, and it also helps to avoid water damage. You also don’t need to worry about mold if you use these trusses.

These trusses are made of timber beams. They are designed to be sturdy and can carry a lot of pressure. They can be used on any size building.

They are made in a variety of shapes. They can be built to meet the needs of a wide variety of roof designs. You’ll have to choose a type that will work well for your needs.

Scissor roof trusses are generally used for building that have a sloped ceiling. However, they are flexible enough to be used in other areas. For instance, they can be used in cathedral ceilings. They are also good for gaining extra headroom in a room. They can also be installed in a home that has an insufficient amount of interior height.

Scissor trusses are also made to be able to hold loads. They have clearly marked joints along the high stress areas. This allows the truss to be able to handle the loads that are placed on it.

It’s easy to customize a scissor truss. The company you choose will be able to make a truss that will meet your specific needs. They will also be able to add more slope to the inside of the truss to help with insulation depth.

You can also choose a truss that has a raised heel. This is sometimes referred to as an energy heel. The raised heel helps to provide a better insulation depth, as well as a built-in vapor barrier. These trusses are also more expensive than average roof trusses. They are usually made from reclaimed lumber.

These trusses are easy to install, but they are not always as easy to inspect as other types of trusses. There is also a possibility that you will need to make repairs after a few years.

King post

Probably the most popular type of roof truss is the king post roof truss. This truss has a very simple design and can be made with very few materials. The king post truss can be used for a range of different projects. However, they are generally not used for very long spans. This means that they are only ideal for smaller projects.

King post roof trusses are a type of truss that is often used in modern traditional timber framed roofing construction. They are used in both domestic and commercial applications. They can be used to provide support to the roof covering, the ridge and the purlins of the building. They are often used with other trusses to create a more visually appealing roof.

The most common king post roof truss is made up of a vertical post known as the king, a horizontal beam called the tie beam, and two struts. The struts are connected to the tie beam in an inclined direction. Each strut is about four inches wide and four inches deep. These are usually made from steel, though wood is also used.

King post roof trusses can be found in any size, but the maximum span is five to eight meters. They are not ideal for long spans because the load-bearing area of the king post is at the top of the posts. They are also used for smaller projects, like building an earoplane or a short span bridge. They are easy to cut and stack, and can be bent to fit any building.

The king post roof truss is designed to provide maximum support to the roof. It is also designed to provide maximum ventilation. The design of the king post truss allows for extra room in the roof.

The king post roof truss provides support for the roof covering and the ridge and purlins of the building. It is made of steel or wood, and is very easy to construct. It is also very affordable. King post roof trusses are not only a beautiful addition to a building, but they also provide effective roof support.


Traditionally, roof trusses are constructed of wood. However, in some cases, more durable materials are used instead. These materials perform better in compression and bending. They are also cheaper to manufacture. For example, precast concrete trusses can be manufactured using existing techniques. The precast trusses are lightweight and achieve aesthetic appeal.

In the present invention, a girder on roof truss system is proposed that uses self-consolidated concrete. The system includes longitudinal elements, a bottom chord, a top chord, and special joints. The bottom chord is a long horizontal beam that defines the lower edge of the truss. The bottom chord must provide a strong support. It also contains a tension tie (bottom flange) which contains two posttensioning ducts. These posttensioning ducts are connected to couplers. The top flange, on the other hand, contains two number 25 (#8) bars.

These bars are used to reinforce the compression strut (top flange). This strut has a concrete compressive strength of 55 MPa. The bottom flange is also reinforced with four number 13 (#4) Grade 420 (60) bars. This truss carries a load of 4,371 kN*m. The diagonal members have similar forces to the full-size truss-girder system. This system is 23% lighter than the Sharjah coal storage facility.

This design optimizes the use of material, cross-sections, and locations of truss-girder members. It also optimizes material use, which reduces the cost of producing the system. This design also eliminates cracking and bending. It also addresses fabrication and construction issues.

The bottom chord is reinforced with grade 1860 (270) low relaxation strands, which have a minimum relaxation of 15.3 mm. The threaded rods used to connect the elements are 38 mm diameter. They have a yield strength of 724 MPa and a maximum load capacity of 862 MPa.

The truss is assembled on site. The components of the truss are locked together by locking means such as plugs, self-tapping screws, and similar devices. The elements are then nailed to each other. For the truss to be transported, 10-15.3 mm diameter Grade 1860 (270) low relaxation strands are used.

The specimen is 9 m (30 ft) long and constructed using self-consolidated concrete. Finite element analysis was conducted to investigate stresses at the truss diagonals. The maximum measured strain was 2.6% at south rod #1.