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Riser - Wikipedia, the free encyclopedia
Riser
From Wikipedia, the free encyclopedia
In sand casting , a riser prevents shrinkage in metal cast parts during the solidification process.
In parachuting , a riser is one of several straps that attach the parachutist 's harness to the suspension lines or shroud lines . Parachutes can be steered by pulling on one or more of the risers, to alter the shape of the inflated canopy , although in most modern parachutes, the primary control mechanism is through a pair of steering lines a.k.a. brake lines attached to the left and right trailing edge of the canopy and routed past the left and right rear risers.
In plumbing , sewage disposal or fire sprinkler systems, a riser is a pipe leading water upwards from the ground or sea-bed level. In domestic plumbing use, it is a shorter name for a rising main.
Similarly, in offshore oil rigs , the riser is used to extend the wellhead from the mudline to the surface.
In structured cabling , the term riser is often used to describe the vertical telecommunications infrastructure in commercial buildings. Copper telecommunications cable extends vertically from the Main Distribution Frame (MDF) to Intermediate Distribution Frame (IDF) generally located on each floor of the building. The space utilized for this cable and the cables themselves are referred to as the riser system.
In a bow (weapon) , the riser is the central part, or handle, where separate from the limbs.
In buildings, a component of steps in a stairway .
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