What is the standard angle for building a staircase ?

Question

I WANT IT TO ASCEND IN TWO SECTIONS AS TO REDUCE STEEPNESS; AND JUST WANTED TO KNOW IF THERE EXISTS A UNIVERSAL ANGLE FOR SAFE UPS AND DOWNS.

Answer 1

Maximum is 42 deg for a domestic stair, 38 for any other, although shallower is preferred for large public stairs or where disabled might be using them.

Answer 2

Although there is a range of angles at which stairs can be built, which would take into consideration things like available space constraints, the closest to a perfect rise and run for stair design is a 7 1/4" rise to an 11 1/4" run, which works out to roughly a 33 degree incline.

Staircase design is usually discussed in terms of the rise and run of an individual step and it is the size of the actual step a person must take that is important when calculating a comfortable and safe ascent and descent on a staircase.

In general, you can use the thumbnail guide of adding rise and run to total 18", more or less, to determine the step. A rise of less than 6" inches feels awkward. A tread length, or run, of more than 12" inches is generally awkward.

Anything more than 45 degrees in incline is considered a ladder and not a staircase, by building codes.

Staircase design is one of the trickier and more complex aspects of house carpentry and should not be taken lightly. Adding a landing, to interrupt a long run of stairs, can be nice. There are all kinds of ways to treat this, too. With a 1/4 turn, or even a 180 degree turn. Adding a landing and a turn takes up a little more space, but may also help if you don't have the room for a single, long run of stairs.

Answer 3

Safety for stairs is the rule of 18. The total of the rise of the step plus the run of the tread should equal 18. Example: you have a rise of 71/2 inches, the tread should be 101/2 inches. on a stairway these should all be as nearly the same as possible. If alot of floor space is available shorten the rise and extend the run a bit. Ex: 6 3/4 in. rise and a 11 1/4 in. run. Both examples total 18.

Answer 4

Not every stair is the same but most are with in 6-7.5 inch rise to 10-12 inch steps.

Here is a site.

http://www.bestdecksite.com/introStairsP...