a set of
stairs forming a right triangle. The stairs use the floor frame as the
top step. Only one-half the
are shown. The Pythagorean theorem (Rise^2 +
run^2 = Stringer Length^2) is used to calculate the hypotenuses or
the lengths of the stringers. To determine the length of the stringer
in figure 45, use the desired unit rise of 175 mm and unit run of 250
stairs have 11 risers and 11
treads. The 12th riser and tread is part of the floor frame. The rise
used in the
Pythagorean theorem to calculate the stringer length will be 175 mm
times 11 =
1925 mm (the total rise shown in figure 45, not the true total rise of
2100 mm). The run used is 250 mm times 11 = 2750 mm. The square root of
squared plus 2750 mm squared = 3357 mm. 3357 mm is the length of the
45 The Top Step Is The Floor Frame
Unit Run Of Stairs.
3.Stairs: Layout A Stringer When The Floor Frame Is The Top
Stringer When The Top Step Is Attached To The Floor Frame.
Layout The Rise
& Run Along The Stringer.
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images and text are copyright Ronald Hunter 2005 to 2011