- quilted mat
- quirk bead
- quit
- quitting word
- quoin
- quoin brick
- quoin header
- quoin post
- quoin stone
- quotation
- quotient
- R-factor
- rabated siding
- rabbet
- rabbet brick
- rabbet interconnection
- rabbet joint
- rabbet ledge
- rabbet plane
- rabbeted joint
- rabbeting
- race
- race course
- race track
- racecourse
- racetrack
- raceway
- racing course
- rack
- rack car
- rack conveyor
- rack railway
- racket
- racking
- racking course
- radar scanner
- radial acceleration
- radial bar
- radial bolt
- radial brick
- radial cable
- radial clearance
- radial cut
- radial displacement
- radial fan
- radial flow
- radial gate
- radial joint
- radial line
- radial load
- radial play
- radial rib
- radial road
- radial screw
- radial section
- radial step
- radial street
- radial stress
- radial triangulation
- radial ventilator
- radian
- radiance
- radiant
- radiant heating
- radiant potential
- radiant surface
- radiated
- radiated light
- radiated power
- radiating bridge
- radiating capacity
- radiating chapel
- radiating drier
- radiating medium
- radiation
- radiation balance
- radiation drying
- radiation effect
- radiation meter
- radiation spectrum
- radiator
- radiator grouping
- radiator rip
- radiator valve
- radical stress
- radio beacon
- radio mounting
- radio tower
- radio truck
- radioactive logging
- radioactive materials
- radiogeology
- radiographic test
- radiometric test
- radiometry room
- radioscopy
- radon balneary
- raft
- rafter
- rafter frame