Collar ties are quite capable of providing additional structural support for the roofs with are wood-framed that can handle the weight of clay or concrete roofing tiles. Collar ties join between every other pair of the opposite rafters at the upper third part from the roof below the ridge or the peak of the roof section. The size of the lumber put into use, like two-by-fours or two-by-sixes, is totally dependent upon the height of the ridge in an attic area. Consult collar ties manufacturers or the local building department to ascertain the size of lumbers for the collar ties.
- Create a catwalk from a piece of ¾ inch plywood to utilize it in the attic area when it comes to installing the collar ties. Cut out a strip of plywood measuring 24 inches wide and 96 inches long with the help of a circular saw. Enter the attic area where the ties are installed, and keep the catwalk flat on the top of the edges of the ceiling joists below the ridge of the roof.
- Measure the vertical distance from the top of a ceiling joist to the ridge of the roof and divide the result by 3 to determine the height of the collar ties. For example, if the height of the ridge is 96 inches, the ties install 32 inches below the ridge, or 64 inches from the top of the ceiling joists.
- Ascertain the measurement of the vertical distance from the top of the ceiling joist to the ridge of the roof and divide the outcome by 3 to calculate the height of the collar ties. For instance, if the height of the ridge is 96 inches, the ties install below the ridge, or 64 inches from the top the ceiling joists.
- If necessary, reposition the catwalk, and mark the side of the rafter at 64 inches above the joists that are placed below the rafter. Place the catwalk to the opposing side of the ridge and mark the opposing rafter at 64 inches from the joist.
- Ascertain the horizontal distance between the marks on the opposite rafters and note the measurement of the collar ties. To determine the number of collar ties, count the pairs of opposing rafters that attach at the ridge and divide it by 2.
- Take note of the measurement and cut the number of collar ties in two-by-fours or two-by-sixes, with the help of a circular saw.
- Place the collar tie flat on the adjacent sides of the rafters. Align the lower ridge at each ends with mark on the rafters. Join the ties to the sides of the rafters in a triangular pattern. Repeat this with every pair of rafters.