riser

riser

1. the vertical part of a stair or step

2. a vertical pipe, esp one within a building

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

Riser

1. The vertical board under the tread of a step; a vertical supply pipe for a sprinkler system; a pipe for water, drainage, gas, steam, or venting that extends vertically through one or more stories and services other pipes.

2. The vertical face of a stair step.

See also: Step

Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

riser

[′rīz·ər]

(chemical engineering)

That portion of a bubble-cap assembly in a distillation tower that channels the rising vapor and causes it to flow downward to pass through the liquid held on the bubble plate.

(civil engineering)

A board placed vertically beneath the tread of a step in a staircase.

A vertical steam, water, or gas pipe.

(geology)

A steplike topographic feature, such as a steep slope between terraces.

(metallurgy)

feedhead

(petroleum engineering)

In an offshore drilling facility, a system of piping extending from the hole and terminating at the rig.

(textiles)

A raised spot in a weaving pattern where the warp traverses the weft or the filling.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

riser

riser, 1

1. The vertical face of a stair step.

2. Any upright face, as of a seat, platform, etc.

3. A platform on the stage of a theater or concert hall on which a performer is placed.

4. A water-supply, drainage, gas, steam, or vent pipe which extends vertically, one full story or more, to service several branches or a group of fixtures.

5. An electrical cable which extends vertically, one full story or more, to distribute electrical power to electric panels on the different floors of a building.

6. A duct, which extends vertically, one full story or more, to distribute air to branch ducts on the different floors of a building.

7. A vertical supply pipe for a fire sprinkler system.

McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.