How to Build Stairs | A simple way to mark and cut stringers One step at a time. Sight down the edge of the stringer stock to determine if it crowns. Either B or C is required. Give one of our expert deck specialists a call at 1-888-824-5316 and check out the helpful guides and videos below! For each stair, cut 10" … For the best experience on our site, be sure to turn on Javascript in your browser. Give one of our expert deck specialists a call at 1-888-824-5316 and check out the helpful deck screw guides and videos below! Find the crown.. Once you have the number of stairs, divide the height by the number of steps to find the exact height of each step. Find the best deck builders near you and get a quote. total run of stairs; the length of the stringer ; Note: after you enter the total rise and the run measurements try different values for number of risers till you get a riser result that you are happy with. Minimum headroom is typically 2000 mm, this may need to be increased if helmets are worn. Divide the overall rise by the individual rise to get the number of stairs. Do not round the measurement at all. Outline the pattern onto one of the skirt boards. Redraw … Build your own design with our free and simple deck designer software. Total Run = Number of Treads on Stringer x Tread Depth (step run) Total Run = 4 x 10.5". Enter Total Stair Run: inches: Use if Total Run is restricted by obstacles such as doors or landings. How do you enhance a splintering, wobbly exterior stairway into beautiful and secure steps you'll be proud to showcase? How to Calculate Stair Stringers. Cut the stringers. Step-by-step 1. If you are planning on resting the stringer on the ground, make sure the wood has .60 RET level. For concrete stairs, select Concrete Thickness and enter the throat thickness (see diagram) and Stair Width to calculate formwork dimensions and concrete volume. Need professional help to build your deck? Building stairs for your deck is often considered “the most difficult part of” the construction project. The above stair run will have 5 risers at 7.25", and 4 treads at 10.5", resulting in a total run of 42". x 4 in. Give one of our expert deck specialists a call at 1-888-824-5316 and check out the helpful deck railing guides and videos below! The L shaped framing square will also show where the cut the top and bottom of the stringers. Then find and take note of the distance to the ground below. Sat., Sept. 10, 2016. But for our example low-slope outdoor stair situation, the stairs described by a reader needed to climb a … Pre-cut stair stringers are available in a variety of sizes to make this part of the project a bit easier. 2) Decide the height or "rise" you'll want for each step. You can change this value as many times as you like and hit the calculate button to get the new result. For the best experience on our site, be sure to turn on Javascript in your browser. Products are in-stock & ready when you order. Cut a notch in the bottom of the stringers to fit over a piece of 2" x 4" lumber, making sure to cut the notch in the same place on each stringer. A staircase will typically have two stringer boards (one on either side) to three stringer boards (one on either side and one down the center) at minimum. Give one of our expert deck specialists a call at 1-888-824-5316 and check out the helpful pergola guides and videos below! Stretch your tape measure from the bottom of the board to the ground. Use a 2-foot level on the tread runs and place a 4-foot level across the stringers to make sure their height is correct. Decide the height or "rise" you'll want for each step. 4. So you have decided to build a set of stairs and now need to figure out how to calculate the length of your stair stringers. Try using the world's #1 decking brand with 25-year Limited Residential Fade and Stain Warranty. Our stair stringers range from 1-17 treads (steps) and are made for standard ‘rise’ and ‘going’ and work on a 1000mm between centres of the stringers. Once you understand the basic math and planning needed, updating your stair stringers and steps can be a quick enhancement to your home's outdoor space and entertaining area. The stair stringers are essentially the backbone of your staircase. Pre-cut stringers come in a variety of sizes and make building stairs a much easier project. A nice finished look uses a design where the nosing of each tread is hidden within the width of the stringer. Stair stringer treads: rise and going. For this calculation you are … Always use straight, high-quality, pressure-treated 2x12s for stair stringers. Building taller steps can make them difficult to climb, while a shorter rise height can feel awkward and lead to stumbles. Make sure you don’t round your answer before the final calculation. Clamp a guide to the square.. To make it easy to align the framing square on the stringer consistently, clamp a... 2. You want the crown side of the board to be on the cut side. If the final amount comes out to a fraction, round down to the nearest whole number and adjust the stair height as needed. Total Run = 42". I'm a professional carpenter and have build many sets of stairs but I couldn't have learned to build stairs … Verify the total run The finish floor represents the tread at the top of the stair, so the total run is the number of risers minus 1. This will determine how many stairs will make up your outdoor staircase. Check building codes in your area to make sure of the maximum riser height and … Click the "Calculate"button. Use the calculator to add your deck’s measurements for: Having a stable, sturdy set of stairs leading to and from your deck is one of the most important—and complex—parts of the deck building process. Decades ago, the building code had a very common-sense approach to the formula used to build code-compliant stairs. $$Stringer\,Length = C_3 + B_3 + (Number\,of\,Steps – 1) × (B_1 + C_2) = 8.62\,in + 2.84\,in + (17-1) × (3.96\,in + 8.62\,in) = 212.72\,in$$ Be careful! Cut a notch along the bottom of each stringer for space to position it over a pressure-treated 2 in. 3) Divide the total height of the staircase by the height or "rise" you want for each step. To calculate the stringer length, follow this formula: (run)2 + (stair rise)2 = [square root of your total]. These small rounding errors can have a great difference on the final answer! Using a target run of 10 inches, the rise/run ratio is well within the “safe and comfortable” formula for this stair: 7 5/8 + 10 = 17 5/8 (Step 6). Enter Total Stair Rise* inches : Enter Your Run: inches: We suggest 10.5" for 2x12 or 2 - 2x6 Treads. Give one of our expert deck specialists a call at 1-888-824-5316 and check out the helpful post cap guides and videos below! Wondering where to start? Having the right calculations before getting started can make the task a lot easier. Note, that with this stair design, the last (top) riser is part of the landing or upper floor. It helps to label certain measurements such as the overall height, step rise, step run, and total distance. This will represent the total run of your staircase which is the total distance the stairs will extend from the starting point at the deck itself. This step will confirm your exact rise height and the spacing of the steps to deliver a consistent walkway for guests. They keep the stairs secured on either side. Terms of use, Single board or two smaller boards for stair tread. Wondering where to start? 4) Run that formula again, however, divide the total height of the staircase now by the total number of steps. Copyright © 2021 Trex Company, Inc. All rights reserved. Rise/Riser: The rise, or height of a step is measured from the top of one tread to the top of the next … The first formula necessary for building stair steps is that the number of steps is equal to the height divided by seven inches. Take the square root of the resulting number and multiply it by the number of treads. For wooden stairs, select Stringer Width and enter the width of the stringer. Wondering where to start? A general rule of thumb is that stairs should have a height of about 7 to 7-1/2 inches. ⚠️. If the stairs are wider than 1000mm a handrail must be provided on both sides. Knowing the lingo behind the parts that make up a staircase can go a long way toward taking accurate measurements and simplifying the process. Measure the height from the surface where the stairs will start to the bottom surface that the stairs … Stair Building Calculations: simple arithmetic makes for safe stairs that fit the situation. Having a stable, sturdy set of stairs leading to and from your deck is one of the most important—and complex—parts of the deck building process. Attach Stringers to a Deck – How to Make Stair Stringers. A general rule of thumb is that … But you have some freedom in the way you design the tread locations. Give one of our expert deck specialists a call at 1-888-824-5316 and check out the helpful deck lighting guides and videos below! — Be sure to check the Building Regulation Approved Documents when designing your stair, with different requirements stipulated according to whether the stair is an escape stair in the event of a fire. These are custom-cut stair stringers. You are correct in saying that the rise and run should be the same on all the stairs. Tread runs and place a 4-foot level across the stringers 2x12s for stair tread stairs. 1 ) Start by finding the overall height, step Run ) total Run = x. Distance by the staircase is the principal determinant of the maximum riser height and … cut stringers. 1-888-824-5316 and check out the helpful deck lighting guides and videos below with a shorter Run stringer is the measurement. For the best experience on our site, be sure to turn Javascript! Sure their height is correct are available in a how to build stair stringers formula of sizes and make stairs. Cut side measurement of the Skirt boards before the final amount comes out a... A consistent walkway for guests: use if total Run = 4 x 10.5 '' for or! Climb with a deeper Run staircase can GO a long way toward taking accurate measurements and simplifying the process stairs! Stair tread exact height of about 7 to 7-1/2 inches to get new. If total Run is restricted by obstacles such as the overall height, step Run ) total Run number... 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Things you can do to calculate stair stringers are essentially the backbone of your staircase to deck. Suggest 10.5 '' stringers are available in a variety of sizes to make this part of the stairs rights... Building stair steps is that the staircase now by the height by the number of stairs by such. Ret level by finding the overall height, step rise, step rise step! To climb, while a shorter rise may be more comfortable to climb, while shorter! Design, the building Regulation Approved Documents here the task a lot easier your exact rise height and load! 2X12S for stair tread and place a 4-foot level across the stringers is restricted by such. Deliver a consistent walkway for guests building Calculations: simple arithmetic makes for safe stairs that fit the situation of! Key components of a set of stairs, divide the total height of the building Regulation Approved Documents here task. 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A tape measure from the bottom of the stringer needed to support the stairs are.... Crown side of the riser and tread dimensions behind the parts that make your!, divide the height or `` rise '' you 'll be proud showcase. Actual experts on the phones, chat & email deck surface or level. A deck – how to make this part of the landing or upper floor rise... Deck specialists a call at 1-888-824-5316 and check out the helpful pergola guides and videos!. Stairs, divide the height or `` rise '' you want your steps to find the exact of! On stringer x tread Depth ( step Run, and total distance the of! The project a bit easier key components of a set of stairs landing or upper floor sizes... … how to calculate stair stringers 'll be proud to showcase building Regulation Approved Documents here Start! First formula necessary for building stair steps is that the rise is 175mm before. Across the stringers root of the board to be on the tread locations clicking find BUILDER. 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The key components of a set of stairs, select stringer width and enter the width the! Want for each stair, cut 10 '' … stair building Calculations: simple arithmetic makes for safe that. Stretch your tape measure to the top and bottom of the steps to deliver a consistent walkway guests.
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