Span Of Roof Definition

The vertical change in height per unit of horizontal distance or run.

Span of roof definition.

Long span roof designing buildings wiki share your construction industry knowledge. The extent or measure of space between two points or extremities as of a bridge or roof. For example a 3 12 roof has a unit rise of 3 of height increase or rise per. Roof slope is the amount of change in height as a ration of horizontal distance traveled usually expressed as inches of rise per foot of horizontal run or cm of rise per m of horizontal run.

Rather the span is based on the rafter s horizontal projection. The span would be 11 5 3 4. Span synonyms span pronunciation span translation english dictionary definition of span. Span roof definition is a common roof having two slopes and one ridge with eaves on both sides.

Normally a roof span is the same as the building width between the outer edges of the wall top plates. Metal decking plans call for joists to be 24 inches apart so a double span deck plank is at least 48 inches long and a triple span deck plank is at. Long span roofs are generally defined as those that exceed 12 m in span. Normally a roof span is the same as the building width between the outer edges of the wall top plates.

Double span decking uses surface material that is long enough to bridge the gap between two joists hence the term double triple span decking uses surface material that spans three joists. This is the horizontal distance from the inside surface of the supporting wall to the inside surface of the ridge board. Span roof definition a roof having two slopes of equal breadth and pitch meeting at a common ridge. Span roof wordreference english dictionary questions discussion and forums.

Long span roofs can create flexible column free internal spaces and can reduce substructure costs and construction times. Definition of roof span. Definition of roof span. Unit rise is a is a snonym for slope or roof slope.

So consider a simple gable roof on a 24 foot wide ranch framed with 2x6 exterior walls and a 1 1 2 ridge.