The ridge board runs the length of the building and provides support for the tops of the rafters helping the whole roof structure work together as a system.
Ridge plate roof.
In simple language the ridge of a roof is the peak where two opposing roof planes meet.
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The main elements of the gable roof layout are the ridge beam common rafters and wall plate.
Ridge beam sizing is based on the span of the beam between supports and the amount of roof load supported by the beam.
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The ridge board must be set as perfectly as possible so take your time and use careful measurements.
Pitch can vary a great deal from a shallow slope up to a very steep pitch.
For example a roof slope that rises 6 inches for every 12 inches of run is said to have a slope of 6 in 12 or simply six twelve.
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Pitch for a gable roof the most common is generally 1 4 or 1 3.
What is a ridge and valley plate.
A common rafter runs from the roof ridge to the top of the front or rear wall plate and extend beyond the wall to provide an overhang or eaves or soffit.
A ridge board is a non structural member that serves as a prop for opposing rafters to rest against and connect to.
Description ridge valley plates act as a smooth transition over two separate roof surfaces that protects the edges of the two meeting metal deck sheets.
Are angled pieces of steel are designed to support roofing material at a hip or valley condition.
Ridge boards can only be used in roofs with slopes from 3 in 12 up to 12 in 12.
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Roof slope is commonly represented as x in 12.
Getting a little more technical the national roofing contractors association defines the ridge as the highest point on a roof represented by a horizontal line where two roof areas intersect running the length of the area.
A ridge valley plate acts as a cap or cover where two sheets converge on top of a roof line.
Which is equal to 1 4 or 1 3 the total span of the building not counting any overhang.
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