I've seen several rules such as the sum of one tread and one riser should always be equal or greater than 17; or two treads plus one riser should add up to around 28 or 29. Where do you set your square at. Watch out: be sure that your boards are at right angles to one another and that the vertical and horizontal boards are plumb and level. I have a stair rise of 101" and a travel distance of 112" with a maximum stair tread height in the State of GA at 7" and tread depth of 11". If you have the Rift S, it uses a different method. tread depth calculation rules for a stair type, edit the Calculation Rules in the stair type properties. Its length is measured … So yeah, we can build steps at that riser height - it's acceptable. R311.7.4.1 Riser height. The average height of a stair step in the United Sates is 7 1/2 inches, but safe and comfortable stair dimensions should be determined based on a number of factors including how long the step is, how much space the staircase should take up and … I could try to make my first or last step 0.01" taller as that variation is much less than the allowable 3/8", but frankly you'll never sense or feel that 1/100th of an inch accuracy. I will increase my standard step riser height of 7" by 4.9 (inches to gain) / 13 risers. Alibaba offers 839 Adjust Stair Suppliers, and Adjust Stair Manufacturers, Distributors, Factories, Companies. Select your base and top levels. Get answers fast from Autodesk support staff and product experts in the forums. I find that if we keep variation to 1/8" in step riser heights nobody will notice, nor be uncomfortable. Vertical Reach Height. Page top stair dimension sketch courtesy of Carson Dunlop Associates. See Stair Component Instance Properties. There are 609 OEM, 545 ODM, 135 Self Patent. Municipalities' requirements may vary, but staircase code tends to dictate that railing is 34 inches to 38 inches high, as measured from the nose of the stair tread directly upward to the top of the railing. r+R = 18″ (perfect) 2r+R = 25″ (perfect) → Stair will be comfortable. Step riser height uniformity (<= 3/8" variation) - this means that more than 3/8 of an inch in variation of the height of steps from one step to another is a tripping hazard. Both these options may be exercised through editing the stairs. Indoors that's floor to floor. Generally we solve the problem of low slope long run stairways by using all platforms - steps that are 36" in length or more in the direction of run of the stairs, or by using a combination of normally sized stair treads (say 11" deep treads with a 6" or 7" rise) along with intermediate stair platforms. Forget it. We use 7 inches. So just as you can't put ten pounds of flour into an eight pound sack, you cannot build your stairs to provide a safe step height and still fit them into that 112-inch horizontal distance - not as a straight run anyway.Worse still, 14 steps up without an intermediate landing may be prohibited by your local building department as too many steps up without a landing. On hover, the height is set to height:auto;. 2- ADJUST "OFFSET FROM PATH" When adding a railing to stair Treads, the path offset will be set to 25. Update Rise, Depth and Target Slope; Update Minimum / Maximum Slope Results as per compliance rules. John Wiley & Sons, 2006. It will override any style set in the HTML