A combination roof is quite literally a combination of types of roofs.
Pic of lighting at the peak of the roof.
When lightning protection is desired it is usually achieved by providing a path of low resistance to ground.
Figure 10 40 and reduce that to 1 4.
The most obvious above roof components are air terminals formerly called lightning rods.
Rafters are the traditional method for supporting a roof.
A roof is an integral part of a building and people try to personalise the roof designs to achieve optimum architectural splendour.
Poorly constructed roofs endanger the people living in a building so you need to make the roof compatible to the rest of the building in a well engineered style.
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They must be located at the highest points on a roof.
Depending on the building s size and configuration additional air terminals are required around the roof perimeter at intervals not exceeding 20 feet within the field of the roof on rooftop.
The main factors which influence the shape of roofs are the climate and the materials available for roof structure and the outer covering.
The colour and material of the roof complement the structural integrity of a building.
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Rafter not pictured a supporting beam usually wooden that attaches to the peak of a roof and descends to an outer wall.
Trusses are the more modern engineered.
Copper roofs offer ideal lightning protection where the copper roofing gutters and rain leaders are electrically interconnected and reliably grounded.
Hip and valley roof.
Usages vary slightly from region to region or from one builder or architect to another.
These pyramid roof structures are usually found atop gazebos and other pavilion buildings.
It has a 1 4 pitch.
Roof terminology is also not rigidly defined.
Roof shapes differ greatly from region to region.
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A hipped roof laid on top of a square structure creates a pyramid hip roof or the pavilion roof.
A clerestory and hip roof for example.
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Truss a network of pre made usually double sloped beams connected or bridged by a bottom beam or brace.
A 4 in 12 pitch means the roof rises 4 inches for every 12 inches of horizontal distance.
Often incorporating two or more designs for aesthetics and practical reasons combination roofs can feature a range of styles.
Roof slope is expressed as the ratio of a roof s rise vertical distance to each foot of run horizontal distance.