

1
— 
Construction
of the environment in parallel perspective. 


2
— 
Creation
of the measurement lines of width and height, plus the vertical
horizon line, to where the staircase inclined lines vanish. 


3
— 
Indicate
the staircase width on the measurement line. 


4
— 
Calculate
the height of the 1st. step. 


5
— 
Mark
the measurement corresponding to the tread on the width measurement
line. From point a to point b find the point
c. This point refers to the step depth, that is, to the
measurement of the floor. 


6
— 
Construct
the 1st step using parallel lines and lines that run to the horizon. 


7
— 
Draw
two lines from the sides of the 1st step to join the vertices
of the rectangles. Proceed with these up to the horizon vertical
line and mark the staircase inclination point. 


8
— 
Draw
a diagonal line from point d (vertex of the 1st step)
to the vanishing point of the staircase inclination. The same
applies to the other vertex of the step. 


9
— 
Construct
a staircase as shown in figure nº 18 (next page). 

