Roof Rafter Tie

The tie will go from one side of a roof rafter to an adjacent rafter but on the opposite side.

Roof rafter tie.

Illustration of roof with rafter tie. The tie force at the plate is 480 pounds and only 720 pounds when the ties are 4 feet up from the plate again the maximum allowed by code. We detail these below. Definition of collar ties.

Compare this with a similarly framed 12 12 roof that has similar loads. Where rafters are oriented perpendicular to the ceiling joists rafter ties should. Other facts about rafter ties. Nail one end of the tie into the rafter with 3 inch nails.

Simpson strong tie category roof truss and rafter connectors ties and straps for cold formed steel construction. Measure for each new collar tie. Contrary to popular belief collar ties are not there to support rafters or to keep walls. A tension tie in the lower third of opposing gable rafters that is intended to resist the outward thrust of the rafter under load.

With the first collar tie in place you will follow the same procedure. In most homes the ceiling joists also serve as the rafter ties. High horizontal ties in the upper third of the roof under compression definition of mid span rafter ties. Located in the bottom.

Rafter ties are always required unless the roof has a structural self supporting ridge or is built using engineered. Truss and rafter tie downs are used for wood construction and wood framing projects. Figure 2 is an illustration of a roof constructed using rafter ties. Secure the opposite side in the same manner.

Rafter ties prevent spreading. Moving the rafter ties up only 16 inches from the plate the maximum allowed by code increases the tie force from 1 440 pounds to 2 160 pounds. Located horizontally in the middle of the rafter s run or horizontal span neutral. Step 4 continue installing collar ties.

Definition of low rafter ties.