A girder truss is a type of secondary roof support that is most commonly used in the construction of buildings that have a roof that is irregularly shaped. Its main function is to support the weight of the roof.
A girder truss is typically present in L- or T-shaped buildings due to the fact that the roof changes direction at a sharp angle. Typically, a girder truss is constructed of wood, although stronger materials, such as steel, are often used. A secondary function of a girder truss is to provide structural support to both the roof and the adjoining walls and help buildings withstand hurricanes and other powerful forces.Learn More
The cost of replacing a roof ranges from $4,000 for simple asphalt shingles to $150,000 for high-end slate, The Miami Herald reports. It's more expensive to replace a roof with a steep slope because the work is more dangerous.Full Answer >
To cut the rafters for a hip roof, or a roof with inclined ends, measure out the angles, cut, drop the hip, and cut the tail. Cutting a hip roof takes roughly half a day and requires a band saw, boards for the rafters, a speed square, a tape measure and a pencil.Full Answer >
Laying out a common rafter begins with preparing a detailed roofing plan and obtaining the pitch of the roof. Get the roof span, and make a triangle called a birds-mouth. Calculate the rafters for hip roofs falling on four sides, and use the difference to calculate the lengths of the jack rafters before laying out all common rafters.Full Answer >
A roof can be added over an existing mobile home roof using traditional construction techniques. Materials needed for the project include lumber, insulation, nails, paint, sheathing material and shingles. To begin the process, a plate is nailed along each side of the mobile home, with nails going through the existing metal roof and into the tops of the walls underneath.Full Answer >