I wish the Drawing is self explaning. This is a simple perspective drawing for stairs. The red lines are can be dimensioned. The blue lines are for depth, and blue red and yelow lines create the masses of stairs. After you draw the height lines of every step (pinks), you connect them with the vanishin point. You find the temporary vanishing point by connecting the diagonals of mass boxes (green ones). As we find our temporary v.p. then you should connect first step with the temporary vanishing point cause every corner of the steps line up through our t.v.p. (green again). Than we connect the [color=pink]pink lines with our main V.P. and get the brown lines. At the end we draw our lines where brown and green lines intersects. The dark green lines are used for the slab thickness of upper part.[/color]
You can add rails to your stair by using the temporary vanishing points. and dont draw unnecessary lines it confusess too much. As you can notice there is no slab thickness can be seen lower part. You cant see the right side of upper stair so only left brown lines are drawn.
This one is simpler, you just use your vanishing point and decide the box of your stair. Then you can divide your box in to half by using the diagonals and quarter and so.
