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How to design back door steps

Updated April 17, 2017

Good design can be the difference between steps being easy to use or hazardous. When designed properly, stairs are easy to walk up and down because you don't have to think about every step. But when steps are uneven, they can cause accidents.

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  1. Determine where to put the steps. You may need to level the ground at the base.

  2. Measure from the ground to the bottom of the back door in centimetres. Subtract 5 cm if the door opens outwards.

  3. Divide your measurement by 17.5. This will tell you the number of steps required to make the correct height. 17.5 cm (7 inches) is the maximum height of steps allowed under most building codes.

  4. Multiply by 27.5. Twenty seven and a half centimetres (11 inches)is the minimum width for stair treads under most codes. This will give you the total projection of the steps from the building.

  5. Add the measurement for any extra projection, such as a landing at the top of the stairs.

  6. Warning

    Make sure to check with local planning department for planning permission requirements prior to construction.

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Things You'll Need

  • Tape measure
  • Calculator

About the Author

Michael Rippetoe has been writing for 15 years, and has recently decided to make it his career. He has been a journeyman carpenter, ASE Master Mechanic, certified irrigation professional and currently writes for this site, designs websites, and does professional photography. Rippetoe's articles appear on eHow, Garden Guides, AnswerBag and others.

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