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Glossary terms for letter 'R'


Raft Footing
A slab of reinforced concrete with an edge beam footings under a building.

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Concrete
Rafter
An inclined roof framing member, extending to the eave from the roof.

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Carpentry & Joinery
Raked Ceiling
The inclined portion a ceiling.

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Carpentry & Joinery
Raked Joint
Mortar in brickwork, which has been raked to a specific depth.
Reduced Level (RL)
The elevation relative to a specific datum point.

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Surveying
Reflux Valve
A valve fixed to pipes, which prevents the back flow of sewerage.

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Plumbing & Gasfitting
Render
The covering of a wall surface with cement mixture or plaster.
Renovation
The conversion of an existing building to new inclusions &/or layout.

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Home Building
Retaining Wall
A wall built to retain a mass of solid materials.
Ridge Board
A horizontal board on edge at the apex of a roof.

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Carpentry & Joinery
Ripping
Cutting of timber parallel to the grain.

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Carpentry & Joinery
Rise
The vertical distance which an element rises.
Riser
The vertical face of a step.

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Carpentry & Joinery
Roof Light
A glazed panel in a roof providing natural lighting.

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Roofing, Glass & Glazing
Room Height
The height of a room from the finished floor level to the underside of the ceiling.
Rubble Drain
A trench partially filled with coarse aggregate to drain ground water.
Run Off
The surface discharge of rain water.