Back problems - need more hard chairs other than those at 2 tables. (cars.com)
The IntelliWheels device senses how fast the wheelchair is moving, whether it is on an incline or a decline, and how hard the chair's user is pushing. (scientificamerican.com)
Reisman drew scorn several years ago «by ditching sofas to stop people from loitering, replacing them with hard chairs.» (thefutureofpublishing.com)