How to calculate stringers for a set of stairs

hi my name is Tracy today we'll be discussing how to build a set of stairs most importantly how to build the stringers that help support the staircase themselves first we need to take note of the UVC codes there are seventeen three quarters of an inch maximum riser height per step 10 inch minimum tread depth per step six foot eight inch head height for the staircase and the ceiling so you don't hit your head on the ceiling and a 3/8 inch tolerance from the top your staircase to the bottom of the staircase anymore and you might actually trip on your staircase first off if you can draw this on the wall next to where you're building that might actually help you a lot or our piece plywood or on the floor we want to do you want to measure from the top of our second floor to the top of our first floor in this example it will be 28 inches now generally you would just take 17 3/4 and try to divide it into 28 to figure out how many steps you have but that will not work in this example also usually doesn't work in real life so as long as we use a number less than seventy three quarters of an inch we should be okay for this example the number will be seven seven can go into twenty eight four times so we'll measure from the top of our second floor down seven inches and make a mark down seven inches again down again and one last time which will be the top of our first floor now we know what our rises we need to figure out what our run is we know we're going to have four steps when others a ten inch minimum per step so your stairs could be bigger if they needed to this example will be ten inches so we'll go ahead and measure over ten inches ten inches again ten and ten there's our four steps now we'll create a triangle from the top of the second floor down to the last number forty inches for our run now we're going to draw on our stringer first imagine that you're standing on the second floor you're stepping down onto your first step it's seven inches down and ten inches over we will connect to the there then you go 7-inch it down again 10 inches over seven inches down again 10 inches over and then seven down again on two before now the stringer can be various sizes in this case we're just going to draw an arbitrary line hopefully you can see it there if not I will erase some of the hypotenuse tail I also left the back reference line on in case you want to add a piece of wood to secure it to the second floor with similarly you can use a hanger underneath the stringer to help support the Serkis also one more thing to remember as the finishes on the top of your steps whatever the distance of this finish is and they will all be the same you can remove from the bottom of your stringer and that will keep the same distance between each step thank you that is all I have today I hope you enjoyed the video

Channel: Cool stuff

Views: 439,494

Rating: 4.8084021 out of 5

Keywords: Building stairs, how to, instructions, example, how to build stairs, how to calculate stairs, mathmatics of stairs, stairs math calculate build how to, stair stringers, structur of stairs, explination of stiars

Id: 9I9NmjjOFPE

Length: 3min 25sec (205 seconds)

Published: Sun Mar 02 2014