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Building codes for a single family dwelling typically require hallways to be a minimum of 3 ft (36 inches) in width. A hallway that is 5 ft (60 inches) in width comfortably allows for the passage of two people. As a side note, the width of a typical wheelchair is 22 inches.
48 inches
Residential building codes vary substantially from municipality to municipality and should be checked locally, but at minimum a hallway width should be no less than 36 inches.
The standard height of a kitchen counter according to most architectural and building codes is 36 inches. However, the ADA describes a maximum of 34 inches tall for wheelchair bound access.
"34 ½" however, some now have wheelchair access size as well and this is reduced by 8 inches at the serve area
673in = 1,709.4cm
Assuming that the hallway is 30 m long. 30mx100= 3000 cm . Then divide 3000 cm by 2,54= result: 1181,1023622047244094488188976378 in = (Firstly you have to use any measuring tool to find the length of the hallway in meters, or you may get the final reading in inches if the measuring tape tool has divisions in centimeters and inches. Usually they have divisions on foot and cm)
As long as it is at least 2 inches thick and your father is not very heavy, and the steps are not higher than 8 inches.
the empire state building is a whopping 6,899,840 inches tall
3.3 ft
You can measure it in inches, yards or feet - it depends on the accuracy required.
7 1/2 inches = .625 feet so... 3X18.625=55.875square feet you will need extras for waste and doorways... It can add up fast...