Roof Rafter Tie

Definition of low rafter ties.

Roof rafter tie.

We detail these below. In most homes the ceiling joists also serve as the rafter ties. Located in the bottom. Step 4 continue installing collar ties.

Compare this with a similarly framed 12 12 roof that has similar loads. Rafter ties are always required unless the roof has a structural self supporting ridge or is built using engineered. Illustration of roof with rafter tie. This means that if you secure one end of the collar tie to the left side of a roof rafter you will nail it to the right side of the adjacent rafter.

Measure for each new collar tie. Definition of collar ties. Contrary to popular belief collar ties are not there to support rafters or to keep walls. Secure the opposite side in the same manner.

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. Nail one end of the tie into the rafter with 3 inch nails. Figure 2 is an illustration of a roof constructed using rafter ties. Simpson strong tie category roof truss and rafter connectors ties and straps for cold formed steel construction.

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. Other facts about rafter ties. High horizontal ties in the upper third of the roof under compression definition of mid span rafter ties. A tension tie in the lower third of opposing gable rafters that is intended to resist the outward thrust of the rafter under load.

Truss and rafter tie downs are used for wood construction and wood framing projects. Where rafters are oriented perpendicular to the ceiling joists rafter ties should. Collar ties prevent uplift. Located horizontally in the middle of the rafter s run or horizontal span neutral.

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