Difference Between Rafters and Trusses
Rafters vs Trusses
Rafters and trusses are those that support the roof. Though both rafters and trusses are triangles in shape, the trusses have more triangle webs inside the principle frame. Rafters consist of sloping outer beams which provide support.
As the trusses come with a web of triangles inside the main frame, they provide more support than the rafters.
Trusses and rafters are both assembled ahead of being installed onto the roof. Trusses are assembled in a factory using pre-engineered structures and joints. On the other hand, rafters are assembled at the construction site. As trusses are assembled in a factory, a lot of time can be saved.
When comparing the cost of rafters and trusses, the latter ones cost more. But when considering the labor cost of constructing the roof using other means, it is better to purchase the trusses even though the costs are a bit higher. This is because there is no need to assemble the structure again at the construction site as they have been already assembled at the factories. But as rafters have to be assembled at the construction site, they involve more labor costs.
Rafters contain two main outer beams which support the roof structure. On the other hand, trusses come with multiple beams which add more support. Moreover, as said earlier, the entire weight of the roof is equally shared by a series of triangles inside the main frame.
Nowadays, people prefer trusses for their roofs as they are stronger and also a bit cheaper when calculating the overall cost. Trusses also add an aesthetic beauty to the roofs.
Summary:
1.Though both rafters and trusses are triangles in shape, the trusses have more triangle webs inside the principle frame.
2.Trusses are assembled in a factory using pre-engineered structures and joints. On the other hand, rafters are assembled at the construction site.
3.When comparing the cost of rafters and trusses, the latter ones cost more. But when considering the labor cost of constructing the roof using other means, it is better to purchase the trusses even though the costs are a bit higher.
4.As rafters have to be assembled at the construction site, they involve more labor costs.
5.Rafters contain two main outer beams which support the roof structure. On the other hand, trusses come with multiple beams which add more support.
7.Trusses also add an aesthetic beauty to the roofs.
- Difference Between CNBC and Fox Business - October 3, 2011
- Difference Between Distilled Water and Boiled Water - September 30, 2011
- Difference Between McDonalds and Burger King - September 30, 2011
Search DifferenceBetween.net :
Email This Post
: If you like this article or our site. Please spread the word. Share it with your friends/family.
8) Longer clear spans can be acheived with trusses than rafter.
9) Trusses can be set within a day’s time which ends up cutting production time on the structure.
10) Truss engineering is empirical, and can be seal by a structural engineer in the state of erection within the same cost of ordering the trusses.
11) Sealed truss systems have manufacturer warranty, which stick framing does not.
12) Custom built roof trusses are built in jigs for consistency where rafters are not,
13) Roof trusses are built with camber for settling after the dead load of constructon is applied where rafters are not.
14) Loading for mechanical loactions are designed into trusses whereas rafters are simply doubled with no calculations.
15) Necessary support (beam sizes) for opening can be calculated and sized correctly by the truss designer where in stick framing appropriate uniformed loads are seldom calculated correctly (load path from top through the walls to the foundation).
Hahahaha I see what you did there ….