At 29 inches wide it makes negotiating shopping aisles and doorways easier.
Palo Alto-based Sunflower Labs has raised a seed round of $2.1 million to build a "home awareness system" that monitors homes beyond the doorway, yet is easy to install.
Was it easy to walk through that doorway, or watch someone exit through it?
The easiest method of building a doorway arch frame is to use 2 triangular blocks that are squared at the top and side, and curved on the underside for the span of the arch.
That period (or state) becomes your "doorway", when channeling is easiest and most natural.
The next addition to the International Space Station will be a porch and a doorway that will make it easier for astronauts to go outside for spacewalks.
The theater has been praised for its intricate design, but the narrow hallways and many doorways and stairways mean it is easy to get lost there.
Wide corridors and wide doorways were seen as vital for easy access for those with wheelchairs, and electronic beds that would raise and lower were also reported as useful.
It's easy to miss the two small film stills just inside the doorway of the Ship Inn, Banff.
Not easy, but Ian, he went all the way down: to doorways, as I said, or car parks, cemeteries – anywhere away from the town centre at night.
