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Summary: Building dictionary to explain building jargon and terminology from A - Z.
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Building dictionary for the letter R - Page 13
Rock drill
A high-powered pneumatic or electrically-driven device for boring holes into rock.
Rock saw
A saw');">circular saw that removes a wide kerf on the upper surface of a log. A rock saw is used to remove stones or debris before a log enters the head rig.
Rock wool
A type of mineral wool made by forming fibres from molten rock and slag. Used as insulation in walls and ceilings.
Rockwell hardness
A measure of the resistance of a material to indentation, expressed as an index number obtained by pressing a standard steel ball or diamond into the material under controlled conditions. A high index number indicates a hard material.
Rod
See bar.
Rod bender
A power-assisted device with adjustable rollers and supports that is used for bending steel reinforcing rods into usable shapes.
Rod cutter
Trench-type, hydraulically operated, wedge-like shear, used to cut steel reinforcing rods.
Rod dowel
See dowel
Rod; tamping
See tamping rod.
Rodding
Compaction of concrete or the like by means of a tamping rod. See also tamping.
Roll
(1) A quantity of sheet material wound in cylindrical form. (2) A rounded strip of roofing fastened to and running along the ridge of a roof. (3) Any type of rounded moulding. (4) Any heavy, metal cylinder used to flatten, smooth, or form material.
Roll insulation
See insulation blanket.
Roll-up door (rolling shutters)
A device consisting of horizontal interlocking metal slats that ride along wall guides. When the door is opened the slats coil around a barrel assembly located above the door.
Rolled beam (rolled steel beam)
A beam that is fabricated of steel and passed through a hot-rolling mill.
Rolled glass
Glass that is manufactured with a patterned surface that partially obscures vision and light.
Roller
(1) A heavy, self-propelled or towed device used to compact granular fill. (2) A small hand tool used to smooth wall covering and flooring. (3) See paint roller.
Rolling doors
See roll-up door
Rolling grille door
A device similar to a roll-up door, but with an open grille rather than slats; used as security protection.
Roof
The outer cover and its supporting structures on the top of a building.
Roof covering
The covering material installed in a building over the roof deck. The type of covering used depends on the roofing system specified to weatherproof the structure properly.
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