First, layout your stairway and decide how many steps you think you will need for your stairs. Per most Building Codes, the tread should be between 9.5" and 14". Relevance. The treads of a stair are the horizontal pieces that people step on when walking up and down the stairs. discrepancy is allowed) The reason for the codes? Ninety degree angles are marked on the boards where each stair will be located. For a stairway wider than 36 inches, you will need four spacers laid out on center. 24 answers. When it comes to fire escape stairs or longer runs then uncut stringers incorporating wooden blocks under each tread on the sides is stronger. Risers are vertical boards that join two stair treads together. The number of stringers you need is a function of the width of the staircase and the tread material. They are the foundation on which the stairs are built and must be strong enough to support the weight of the people who use them. You have a few styles you can use depending on the look you prefer. How many stair stringers you actually need will also be determined by the thickness of your stair treads. Stairs that are not supported correctly can buckle or collapse, causing injury. Where possible, these blocks should be installed at every wood-to-wood contact point on the underside of the stair. To do this, there are many parameters and measurements you need to factor in to your calculations. Stretch your tape measure from the bottom of the board to the ground. Stair Terms: Total Rise: The total vertical distance that a staircase will cover; Total Run: The total horizontal distance that a staircase will cover; Stringer (or carriage): The main framing member that runs at a diagonal and supports the stairs. Do apply "glue blocks," where possible, on all of your stringers prior to tread installation. Recommend balusters spaced no greater than 4 inches apart. Some Other Great Reading. This was for a Technology Education project I made for one of my classes. However, local residential codes may vary slightly, so check the building codes before building a staircase. The primary function of the stringer is to provide a framework or support to the tread and risers and hide the edge of the stairs exposing the tread […] CIVICATEGORIES. How many step will I need? McNally also wrote and edited career and computer materials for Stanford University and Ithaca College. A set of stairs may need even more stringers if the width of the stairs exceeds 72 inches to ensure that the stringers are no more than 36 inches apart. Stairs Calculator This calculator is intented as a guide. If you're stairway is between 30 and 36 inches you will need three stair stringers. How Many Stair Stringers Do I Need For An 11 Foot Long Stair. This will tell you exactly how high the new stairs will reach. If you need a greater adjustment in the stair height between the ground surface and the deck surface in order to avoid having to re-cut a whole new pair of stair stringers, sometimes that can be accommodated by changing the height of the surface of the concrete or other masonry platform that many building departments and local codes require be placed as a landing at the bottom of the stairs. Easy to use free stair calculator by EZ Stairs. Because of this, you should never space your stair stringers more than 16” on center. Determine the overall height of the stairs. If you’re going to use a 4 x 12 stair tread, there’s a good chance that you would only need one stair stringer at each end of the stairs, if you’re stairway is less than 40 inches wide. 1 decade ago. The end stringers on an open staircase may also support the balusters. In a set of stairs 36 inches wide, there are typically three stringers (one on each end and one in the middle). Tag: how many stair stringers do i need. There are usually at least three stair stringers supporting the treads; there is one on each end and in the middle of the tread, depending upon the size of the stairs. A child could easily fall to concrete below. Stringers support the components of a staircase. 2 Answers. Every single measurement must be precise, or the stairs may make those who use them stumble or trip. 8.0625 or 8 1/16). If I were building stairs from scratch, I’d have to say “no.” Without a stair stringer, I’d have no place to put the stairs. Stringers provide a supportive framework on which to anchor the components of the stairs. Treads and risers are fixed to these stringers to create a stable structure for a set of stairs. 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). As in construction of indoor stairs if you have backs to the stairs then the structure is stronger and won't require a center stringer. more ››, How to cook a whole chicken in a crock pot with vegetables, How to test your blood type at home without a kit, How to cook a beef round roast in the oven, How to thank someone for a recommendation, How to check if an element is in an array javascript, How to intercept text messages without access to the phone, How to fold a piece of paper into a letter, How to get a youtube link to start at a certain time, How to cook frozen corn on the cob in the microwave, How to get rid of japanese beetles on grape vines, How to buy a house that is for sale by owner, How Many Stair Stringers Do I Need For An 11 Foot Long Stair. Besides the fact the the railings do not meet code, and the stringers whether doubled or tripled for a 3 foot stair which is not apparent in the photo, I would recommend a 2 x 12 for a stringer with no intermediate support or in this case have one installed due the illusion that it looks quite flimsy. Coupon for These are tried, tested and true methods of attaching stair treads to stringers. Read More. This means you will need to install a minimum of four stringers on any stairway wider than 36”. Deck stair stringers are 9 feet long without center supports. how many steps needed for a 4 foot high porch? These stringers should be strong enough so that a person walking on any part of the tread, in the middle or on the sides, will feel no difference in tread stability. International Association of Certified Home Inspectors: Inspecting a Deck, Illustrated. In this case we are laying out and cutting an "open" stringer, which is cut in a stepped pattern of vertical and horizontal cuts. 3 Stringers are the boards that run diagonally on either side of a staircase. 1. Staircase stringer is a structural member installed on either side or in the center of a flight of stairs into which the treads and risers are fixed. Answer Save. 2. The tread is attached to the horizontal surface of the angle, while the risers are attached to the vertical surface of the angle. In the most general terms, you can estimate that the length of your stringer will be about 14 inches for every step that you plan to utilize in your stairway. They also give the stair additional stability. 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. Always check the maximum span for your decking material as it applies to stair treads. Quite simply it is because it is what feels normal to most individuals, and helps eliminate tripping hazards. Before laying out your tools and getting started, you need to make sure each step will be identical in both size and shape. The stringers can be purchased pre-manufactured at you local Home Depot in the Building Department. how many steps should my stringers have to cover a drop of 4 feet from my porch to the ground? A child could easily fall to concrete below. She holds a master's degree in career development from John F. Kennedy University and a bachelor's degree from Cornell University in counseling. In case you are stairway is between fifty and 36 inches you should have three stair stringers. Support of each tread then falls fully on the stringers. 3 Plan for the width of each stair to be 36 inches (91 cm). Also, what do you use for stair stringers? 311.7.4.3 – Stair tread nosing must extend out ¾” to a maximum of 1 ¼” past front of riser unless the tread is 11” or larger (just like above 3/8” max. Cut stringers can be spaced no more than 18 inches on center, so a 3-foot-wide staircase needs three stringers, and a set of slightly wider stairs (say 3 feet 6 inches) needs four stringers. Stringers should be spaced no more than 36 inches apart from each other for maximum stair support, according to the International Association of Certified Home Inspectors. Literally. of each step and the length of the boards needed for the stair stringers. Balusters, also called spindles, pickets or turnings, are decorative pieces of wood that fit between the stair stringers and a handrail. 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