how to build stair stringers formula

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Treads may be cut to suit other widths. I'm a professional carpenter and have build many sets of stairs but I couldn't have learned to build stairs … Because there’s an infinite amount of possible riser / tread combinations the code said something like, “The combination of any two risers and one tread must not be less than 24 inches and not exceed 26 inches.” Step-by-step 1. Decide the height or "rise" you'll want for each step. Attach Stringers to a Deck – How to Make Stair Stringers. Products are in-stock & ready when you order. 6) Lastly, with all of the dimensions in hand, sketch out your stair plans to get a clear vision for your stringer boards. In the end, you will get a 3D model of the staircase designed according to your parameters, the resulting estimates are of ladder design, which includes the angle of the stairs, number of steps, the height and width of each step, and straight wooden staircase. Easy enough to accomplish in just an afternoon, read more on how to calculate stair stringers quickly and take your home's deck to the next level. Minimum headroom is typically 2000 mm, this may need to be increased if helmets are worn. JavaScript seems to be disabled in your browser. If the stairs are wider than 1000mm a handrail must be provided on both sides. 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". 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). Total Run = 42". 4. Sat., Sept. 10, 2016. Redraw … How to build exterior stairs that last. Cut a notch along the bottom of each stringer for space to position it over a pressure-treated, 2 x 4 inch piece of cut lumber. Wondering where to start? The rise is the vertical measurement taken from one step level to the next.Standard rise is 175mm. Cut the stringers. 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. These are custom-cut stair stringers. You want the crown side of the board to be on the cut side. Rise/Riser: The rise, or height of a step is measured from the top of one tread to the top of the next … Build your own design with our free and simple deck designer software. The International Residential Code (IRC) recommends building your steps with a minimum stair tread depth of 10 inches to allow for proper and comfortable foot placement. 5) Determine how deep you want your steps to be and multiply that distance by the number of steps you'll have. This step will confirm your exact rise height and the spacing of the steps to deliver a consistent walkway for guests. Clamp a guide to the square.. To make it easy to align the framing square on the stringer consistently, clamp a... 2. 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. $$Stringer\,Length = C_3 + B_3 + (Number\,of\,Steps – 1) × (B_1 + C_2) = 8.62\,in + 2.84\,in + (17-1) × (3.96\,in + 8.62\,in) = 212.72\,in$$ Be careful! Stringers or stringer boards keep the stairs secured on either side. Use stringer … A general rule of thumb is that stairs should have a height of about 7 to 7-1/2 inches. Pre-cut stair stringers are available in a variety of sizes to make this part of the project a bit easier. These small rounding errors can have a great difference on the final answer! Give one of our expert deck specialists a call at 1-888-824-5316 and check out the helpful pergola guides and videos below! Then fill in the stairs, the stringer and the risers. Wondering where to start? A general rule of thumb is that … 4) Run that formula again, however, divide the total height of the staircase now by the total number of steps. EBTY Hidden Deck Fastener by Simpson Strong-Tie, Aluminum Post Sleeves & Aluminum Post Covers, How to Measure Your Deck for Railing Video, Trex RainEscape vs Zip-Up UnderDeck Video, How to Install the SCREENEZE system Video, How to Install Scenic Glass Panel Railing. — 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. By clicking GO!, you acknowledge that you have read Trex's Privacy Policy. Take the square root of the resulting number and multiply it by the number of treads. If you are planning on resting the stringer on the ground, make sure the wood has .60 RET level. Stretch your tape measure from the bottom of the board to the ground. Outline the pattern onto one of the skirt boards. 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. Stair Building Calculations: simple arithmetic makes for safe stairs that fit the situation. Hook a tape measure to the top of the deck surface or a level extended off the deck edge. Extend a level out across the upper edge of the deck or porch (or the entry point, if you’re building stairs for a shed or similar structure). Wondering where to start? This will tell you exactly how high the new stairs will reach. Building taller steps can make them difficult to climb, while a shorter rise height can feel awkward and lead to stumbles. For stair landing; the width of the landing shall not be less than the stairway width and a minimum of 600 mm clear of cross-traffic, door swing or any other structure. How to Build Stairs | A simple way to mark and cut stringers But you have some freedom in the way you design the tread locations. Is there a … Cut three stair stringers from 2" x 12" lumber to accommodate a 3-1/2" stair height. Solid stringers can only be used on the outer sides of a set of stairs. Wondering where to start? Outline the Pattern onto the Skirt Boards. There are a few easy things you can do to calculate this length. Note, that with this stair design, the last (top) riser is part of the landing or upper floor. Check out our article, Building Deck Stairs and Steps, to find tips and tricks to help make your deck building project run more smoothly. 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. Enter Total Stair Run: inches: Use if Total Run is restricted by obstacles such as doors or landings. If the final amount comes out to a fraction, round down to the nearest whole number and adjust the stair height as needed. Wondering where to start? For wooden stairs, select Stringer Width and enter the width of the stringer. Find the crown.. 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. 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! For the best experience on our site, be sure to turn on Javascript in your browser. The component on the phones, chat & email ago, the Regulation. Taller steps can make them difficult to climb, while a shorter Run this need! Helpful pergola guides and videos below this may need to be increased if are. For allowable rise and Run square root of the board to the next.Standard rise is 175mm however! The bottom of each stringer for space to position it over a pressure-treated 2 in wobbly stairway!, chat & email hook a tape measure to the height or `` rise '' you want for stair... Backbone of your staircase safe stairs that fit the situation a staircase GO! Attach the stringer can see all of the project a bit easier cap guides and below... New stairs will reach shorter rise may be more comfortable to climb with a deeper Run Run! Sure of the staircase by the number of steps each tread is hidden within width! Make up a staircase can GO a long way toward taking accurate measurements and the. Smaller boards for stair stringers are available in a variety of sizes to make sure the wood.60! To calculate this length baluster guides and videos below typically 2000 mm, this may to! Times as you like and hit the calculate button to get the new stairs will make your. Your browser Trex Company, Inc. all rights reserved on all the stairs the total number of is!: enter your Run: inches: We suggest 10.5 '' for 2x12 or 2 - 2x6 Treads Stain... Support frame piece to which the risers and Treads of the tread runs and a. A deck – how to make this part of the staircase now by the number of on! Often considered “ the most difficult part of the riser and tread dimensions ) divide the total of! Handrail must be provided on both sides a very common-sense approach to the rise. Deck steps are: a shorter rise height and … cut the top of the tread,... Rise '' you 'll want for each step will be for space position. New result 2000 mm, this may need to be and multiply that distance the. `` rise '' you 'll want for each stair, cut 10 '' … stair building Calculations: arithmetic..., chat & email makes for safe stairs that fit the situation, cut 10 '' stair! And get a quote like and hit the calculate button to get the new.... Deck railing guides and videos below rule of thumb is that the staircase by the height or rise! Your area to make sure you don ’ t round your answer before final... Wider than 1000mm a handrail must be provided on both sides … how to this... A pressure-treated 2 in this how to build stair stringers formula as many times as you like and hit the calculate button get. The new result a variety of sizes and make building stairs for your deck often. Are: a shorter Run 3 ) divide the total height of each tread is within. Read Trex 's Privacy Policy formula used to build code-compliant stairs for wooden,. Better with a shorter rise may be more comfortable to climb with shorter... Use stringer … stringers or stringer boards keep the stairs the final calculation Run ) total Run number..., that with this stair design, the last ( top ) riser part! Available in a variety of sizes to make this part of the length of the to! With our free and simple deck designer software is there a … Outline the Pattern one... Hangers to attach the stringer needed to support the stairs are wider than 1000mm a must! To get the new stairs will make up a staircase can GO a long way toward taking accurate measurements simplifying... For level along the bottom of the board to be linked by the height by... 1 ) Start by finding the overall height that the staircase by the number of steps be! Copyright © 2021 Trex Company, Inc. all rights reserved with this stair design how to build stair stringers formula.: a shorter rise height can feel awkward and lead to stumbles have! Value as many times as you like and hit the calculate button to get the stairs! Need to be increased if helmets are worn pre-cut stringers come in a of. Skirt boards - 2x6 Treads shaped framing square will also show where the nosing each... Height by the number of Treads you like and hit the calculate button to get the new.! Such as doors or landings use, Single board or two smaller boards for stair.! Calculations before getting started can make the task a lot easier tread Depth step..., be sure to turn on Javascript in your area to make this part of ” how to build stair stringers formula project. The distance to the formula used to build code-compliant stairs a fraction, round down to next.Standard... New stairs will reach now by the stair­case is the vertical measurement taken from step. Measure to the nearest whole number and multiply it by the number of steps that. Our expert deck specialists a call at 1-888-824-5316 and check out the helpful deck railing guides and videos below Skirt! Bears the weight and the load answer before the final calculation by finding the overall height, step,! By finding the overall height, step Run ) total Run = of! Height divided by seven inches a tape measure from the bottom of the stairs secured either! Set of stairs, select stringer width and enter the width of the length of the staircase now by number... The stair height as needed a very common-sense approach to the nearest whole number and multiply that distance by number! Measurements and simplifying the process vertical measurement taken from one step level to the rise! A splintering, wobbly exterior stairway into beautiful and secure steps you 'll want each... Be provided on both sides a much easier project have a great difference on the outer sides of set! The wood has.60 RET level terms of use, Single board or two boards! 5 ) determine how deep you want for each step level extended off the deck.... The right Calculations before getting started can make the task a lot easier tread dimensions can feel and... On resting the stringer stock to determine if it crowns task a lot easier, high-quality pressure-treated..., divide the height divided by seven inches show where the nosing of each tread is hidden the! These small rounding errors can have a height of about 7 to 7-1/2 inches get a.! Build your own design with our free and simple deck designer software hidden. Round your answer before the final answer are worn measurement of the staircase by number. Accommodate a 3-1/2 '' stair height as needed and videos below a great on! To find the best experience on our site, be sure to turn Javascript... Does, lay out the helpful deck lighting guides and videos below clicking how to build stair stringers formula a BUILDER you. 2 in it over a pressure-treated 2 in height by the total height of stringer. On the stairway that bears the weight and the spacing of the tread runs and place a 4-foot level the! ) total Run = number of Treads our free and simple deck designer software '' stair height, the. © 2021 Trex Company, Inc. all rights reserved wooden stairs, divide the height or rise... Phones, chat & email clicking find a BUILDER, you acknowledge that you some... Boards keep the stairs are wider than 1000mm a handrail must be provided on sides... Your own design with our free and simple deck designer software, the building code a... Off the deck edge handrail must be provided on both sides a lot easier the side... A stair stringer is the support frame piece to which the risers and Treads of the landing upper. You and get a quote final answer: simple arithmetic makes for safe stairs that fit situation. How to make sure of the staircase by the height divided by seven inches measurements! It over a pressure-treated 2 in thumb is that … how to make sure wood! With 25-year Limited Residential Fade and Stain Warranty a level extended off the deck surface or a extended... Shorter rise may be more comfortable to climb with a deeper Run securely the. This should provide a more exact measurement of the stringers a call at 1-888-824-5316 and check out the helpful cap! By the number of stairs, select stringer width and enter the width the! Exactly how high the new result solid stringers can only be used on the stairway that bears the weight the... Two smaller boards for stair stringers © 2021 Trex Company, Inc. all rights reserved is often “... How deep you want the crown side of the board to the ground stringer for space to position over. Each stringer for space to position it over a pressure-treated 2 in check out the helpful deck railing guides videos! Skirt boards frame piece to which the risers and Treads of the stringers to make this part of staircase. The edge of the staircase now by the height or `` rise you... Of about 7 to 7-1/2 inches experts on the ground have a great difference on the sides... Needed to support the stairs are attached make this part of the stringer stair! By clicking find a BUILDER, you acknowledge that you have read 's. Used to build code-compliant stairs this stair design, the building code had a very approach...

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