Rafter Ties Roof

2x6 collar tie is located about 30 below the bottom of the ridge board.

Rafter ties roof.

This article excerpts from provides copies of roof framing suggestions from canadian building codes and the cmhc wood frame house construction guide. Some of these can support the roof and prevent ridge sagging and wall spreading. Figure 2 is an illustration of a roof constructed using rafter ties. A rafter tie is a tension tie in the lower third of opposing gable rafters that is intended to resist the outward thrust of the rafter under a load.

The tie will go from one side of a roof rafter to an adjacent rafter but on the opposite side. Here s a formula i use to determine tie force. The rafters are about 14 6 in length roof pitch is 6 12. Step 3 install collar tie to roof rafters.

This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams. Rafter tie a tension tie in the lower third of opposing gable rafters that is intended to resist the outward thrust of the rafter under load. If you are framing a cathedral ceiling there are a couple ways to deal with the need for rafter ties. The roof framing mock up below shows a standard rafter tie.

T w 2 x h h x run rise where w equals rafter load h equals height of ridge and h equals distance from ridge to center of tie illustration below. Collar ties rafter ties tension beams structural ridge beams. A rafter tie is a tension tie in the lower third of opposing gable rafters that is intended to resist the outward thrust of the rafter under a load. Roof framing suggestions canadian guidelines.

The roof framing mock up below shows a standard rafter tie. Framing any roof but particularly a gable roof low slope roof and cathedral ceilign roofs requires collar ties rafter ties and possibly a structural ridge beam to support the roof and to. Rafter ties or ceiling joists acting as rafter ties are required by code unless the house is designed so that the walls or a structural ridge beam carries the full load of the roof. In many situations you ll find that ceiling joists installed parallel to the rafters are intended to function as rafter ties.

Take the collar tie up to the attic and lift it into position to check for the fit. In many situations you ll find that ceiling joists installed parallel to the rafters are intended to function as rafter ties.