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This helps keep walls from spreading due to the weight of the roof and anything on it, remarkably wet snow. In numerous or most homes, the ceiling joists also provide as the rafter ties. When the walls extend, the roof ridge will sag.
A sagging ridge is one clue that the home may lack sufficient rafter ties. Rafter ties form the bottom chord of a simple triangular roof truss. They resist the out-thrust of a triangle that's trying to flatten under the roof's own weight or snow load.
They are positioned in the bottom one-third of the roof height. Rafter ties are constantly required unless the roof has a structural (self-supporting) ridge, or is built via engineered trusses. A lack of rafter ties is a grave structural issue in a conventionally framed roof.
NEW
HOME CONSTRUCTION - TIE BEAM
Rafters or Tie beam Rafter ties are considered to tie
together the bottoms of opposing rafters on a roof, to resist the outer thrust
where the roof meets the house ceiling and walls.
This helps keep walls from spreading due to the weight of the roof and anything on it, remarkably wet snow. In numerous or most homes, the ceiling joists also provide as the rafter ties. When the walls extend, the roof ridge will sag.
A sagging ridge is one clue that the home may lack sufficient rafter ties. Rafter ties form the bottom chord of a simple triangular roof truss. They resist the out-thrust of a triangle that's trying to flatten under the roof's own weight or snow load.
They are positioned in the bottom one-third of the roof height. Rafter ties are constantly required unless the roof has a structural (self-supporting) ridge, or is built via engineered trusses. A lack of rafter ties is a grave structural issue in a conventionally framed roof.
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