Roof Supports Run Parallel To The Ridge

The roof will not be entirely flat as you will need to plan for rain water drainage via water drains placed strategically within the roof surface.

Roof supports run parallel to the ridge.

The most common roof to wall intersections involve either a gable roof with its ridge running perpendicular to the wall or a shed roof that slopes downward away from the wall. A sagging ridge is one indication that the roof structure may lack adequate rafter ties. When ceiling joists run perpendicular to the rafters inspectors may find rafter ties installed above ceiling joists as framing members every 4 feet running above the ceiling joists. Which is equal to 1 4 or 1 3 the total span of the building not counting any overhang.

Some of these can support the roof and prevent ridge sagging and wall spreading. Roof framing and 3 adequate connections between the roof structure and the top of the wall to create a complete vertical load path. The same roof has a 4 12 or 1 3 pitch. Rafters are sloped beams that run from the roof s ridge to the eaves.

The difficulty lies in getting it just right to keep any type of water from leaking through and damaging the roofing materials. The system includes all the. 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. Shingling a roof ridge is perhaps the most difficult and easiest project to finish off a roof project the roof ridge is the uppermost portion of the roof where the shingles are laid a little bit differently.

Collar ties rafter ties tension beams structural ridge beams. A purlin is a horizontal piece of timber or metal which supports the roof s rafters or decking and helps to prevent your roof from sagging. The structural integrity and successful performance of the roof structure during high wind events depends upon. Slope a roof s slope is the number of inches it rises for every 12 inches of horizontal run a roof with a 4 in 12 slope rises 4 inches for every 12 inches of horizontal run.

1 adequately designed and spaced roof framing members 2 adequate lateral bracing to support. A hip rafter extends from the wall plate to the ridge in the angle of a hip roof. Pitch can vary a great deal from a shallow slope up to a very steep pitch. A rafter tie forms the bottom chord of a simple triangular roof truss.

Pitch is the slope or angle from the wall plate to the roof ridge line.