Stairs: basic dimensions
Building a staircase for the first time (a miller's ladder most often) is no easy task. In launching blindly, it was quickly to end up with a steep slope, too much or not enough steps... or all at once.
Here are some "basic" measures to achieve a functional and aesthetic result.
The height of the steps (from one side superior to the following one) can vary from 15 to 20cm according to the use and the slope. A staircase "normal use", will present a walking height of 17-18cm; more for a purely functional staircase, or less for a "ceremonial" use.
The lap, which is measured from the nose of the step above the nose of the next step (it is the depth of the walk), must obviously be regular and if possible not less than 25cm: it is necessary always be able to put your foot on it.
The step must measure from 1m to 1.20m for a "normal" staircase. Below, it would be more appropriate for a service staircase (attic, cellar), beyond for a higher standing (hall, reception room).
Blondel's formula allows you to obtain a harmonious and practical staircase. It is defined as follows: bosom + 2 heights = 64cm. A few centimeters: a result between 60 and 65cm is quite suitable.
Dimensions of the stairs.
Above all, it is important to know:
The height of the floor, taken directly above the point of arrival (be careful that there is no difference in level between the starting point of the staircase and the point directly above the point d 'arrival).
The decline, measured from the start to the point of arrival of the staircase (door, or according to Blondel's formula).
The precise dimensions of the cage: length (several if spiral staircase), width and angles. Depending on where you place a staircase, the cage may not always be perfectly square.