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The hight of the first step is 10 cm and the hight of the each step is 17.5 cmhow high from the ground would be some one climbing up after each step? |
Answer» Over the years, carpenters have determined that tread width times riser HEIGHT should EQUAL somewhere between 72 to 75 inches. On a main stair, the maximum RISE should be no more than 8 1/4 inches and the minimum run should be no less than 9 inches. |
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