Calculation of ladders with three spans and smooth landings


drawing scale 1:

Specify dimensions in millimetres

The height of the opening Y
The length of the opening X
Width of stairs E
stage A
stage B
stage C
The thickness of the steps Z
Protruding edge of the steps F








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Calculation of ladders with three spans and smooth landings



Enter the required dimensions in millimeters staircase to second floor ladder 180

X - aperture width of stairs
Y - The height of the opening
E - Width of stairs
F - Ledge steps
Z - The thickness of the steps


step ladders A - Number of steps on the upper bowstring
B - The average number of steps a bowstring
C - number of treads on the bottom closed
staircase flooring SP - Determine the position of the first degree relative to the level of the floor of the second floor.
In the first situation of upper stage located at the level of the floor of the second floor.
In the second case, the floor of the second floor is the last step. The height of the stairs will be proportionally reduced



The program automatically calculates the height and width of steps, the angle and the dimensions of the upper, middle and lower strings.
For optimal convenience stairs change number of steps.
You can generate a black and white or colored drawing.

Stair width is the width of the stairs swinging site.

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zhitov Author of the project: Dmitry Zhitov        © 2007 - 2018
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