For example a 3 12 roof has a unit rise of 3 of height increase or rise per 12 of horizontal run or distance.
Roof architecture definition.
They were usually set at a slope or pitch so that rainfall could drain off.
Roof covering of the top of a building serving to protect against rain snow sunlight wind and extremes of temperature.
Roof shapes vary from almost flat to steeply pitched.
Unit rise is a is a snonym for slope or roof slope.
Roofs have been constructed in a wide variety of forms flat pitched vaulted domed or in combinations as dictated by technical economic or aesthetic considerations.
Definition of roof span.
A roof is part of the building envelope.
They can be arched or domed.
Roof covering of the top of a building serving to protect against rain snow sunlight wind and extremes of temperature.
Roof terminology is also not rigidly defined.
Roofs have been constructed in a wide variety of forms flat pitched vaulted domed or in combinations as dictated by technical economic or aesthetic considerations.
Usages vary slightly from region to region or from one builder or architect to another.
Or truncated to mini.
Roof shapes differ greatly from region to region.
The vertical change in height per unit of horizontal distance or run.
A single flat sheet or a complex arrangement of slopes gables and hips.
The characteristics of a roof are dependent upon the purpose of the building that it covers the available roofing materials and the local traditions of construction and wider concepts of architectural design and practic.
Readers should see the additional photo and drawing guides to building architectural styles in the links listed at page top or.
Normally a roof span is the same as the building width between the outer edges of the wall top plates.
The earliest roofs constructed by man were probably thatched roofs that were made of straw leaves branches or reeds.