Residential stairs are required to have a minimum width of no less than 36 inches and should have stringers every 16-18 inches. Stairways of 36 inches will need at least three stringers. Stairways wider than 36 inches will need at least four stringers. 2 How to Measure Stair Stringers Use our stair and step calculator and get your total stinger length, riser dimensions, and more with Decks.com.
Stair Stringers Calculation and Layout JLC Online
A stringer is used to support stair treads uniformly spaced to ease the step up or down between ground and deck, deck and deck, or structure and deck. Stringers are commonly made from pressure treated 2×12 or two 2x6s fastened together along their length. Stringer: A stair stringer is a structural member that supports the treads and risers of a staircase. Typically, there are three in a staircase: one on each side, and one in the middle. Stringers are not always visible, but can be seen on stairs with open sides. The stringers can either be cut to the shape of each step, or in some cases, are. 1 Determine the overall height of the 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). Stretch your tape measure from the bottom of the board to the ground. This will tell you exactly how high the new stairs will reach. [1] It is acceptable and within building code guidelines to use either 2×10 or 2×12 dimensional lumber to create a set of stairs; however, a stair stringer should not be less than 3.5 inches wide at its narrowest point to provide adequate strength for the load the stairs will be supporting. Contents (Jump to Topic) [ show] What Is a Stair Stringer?
Inspecting Stair Stringers InterNACHI®
Step 2: Establish the number of risers. Divide the height dimension by 7-3⁄4 inches (the maximum riser height allowed by building codes). That will give you a number and a decimal fraction. STAIR STRINGERS AND TREADS Featuring TimberStrand® LSL Stair Stringers and Weyerhaeuser SturdiStep® Stair Treads Engineered Wood Solutions for Strong, Stable Stairs Resists Bowing, Shrinking, and Splitting Straight and Consistent Better Nail Holding Capability Eliminates Adjustments for Shrinkage Minimizes Material Waste This example uses 5/4 x 6 decking that is 1" thick, a stair rise that is 6-3/8" and a bottom stair stringer rise that is 5-3/8". The cut line is in red. Save. Stair Treads. Notice that the stair stringer top step has a 9" run and the next step has a 10" run. The back tread for the top step had to be ripped down to fit the opening. The building code ( IRC, R311.7 Stairways) [Editor's note: link updated to 2021 version] is strict regarding stair layout and includes the minimum tread depth (10 inches), the maximum riser height (7 3/4 inches in the IRC, but this can vary by state), the maximum variance (typically 3/16 inch) between riser heights in a given stairway, and more.
How To Attach Stair Treads To Stringers
Calculate your stair rise, run, stringers, head-room and upper floor opening dimensions with ease. Our intuitive calculator and detailed plan diagrams make stair construction a breeze. Whether you're a seasoned builder or a DIY enthusiast, Blocklayer has the tools you need to get the job done right. 13 Runs ↔ 10" 14 Rises ↕ 7~1/8" Ideal Run 1 Flexco 42-in L x 12-in W Medium Gray Vinyl Stair Stringer Model # 42LVR00P014 Find My Store for pricing and availability 3 Flexco 54-in L x 12-in W Vizcaya Palm Rubber Stair Stringer Model # 5450000P047 Find My Store for pricing and availability Flexco 84-in L x 7-in W Black Dahlia Rubber Stair Stringer Model # 84RSRP001 Find My Store
To use our stair calculator, you need to enter the following measurements as a minimum: Total Run - The total horizontal length of the stair stringer. Total Rise - The vertical height between the bottom of the first step and the top of the final step in the stair stringer. Stringer Width - The total diagonal measurement between the edge. If the stair treads are set into grooves routed into the stringer, in a 2x stringer the groove depth should be 1/2 the thickness of the stringer (typically 3/4") and additional support by cleats or by gluing and end-screwing through the stringer sides into the treads is good practice.
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What to Know About Cutting Stair Stringers This Old House
To ensure accurate measurements, you will need a few essential tools. These tools will help you measure accurately and mark the dimensions on the stringers for cutting. The tools needed include: 1. Tape measure: A tape measure is essential for measuring the various dimensions required for stair stringer calculation. Stringer Length Calculator. Calculate the length of a stringer from the total rise, the number of risers and known run of one tread. The number of Risers. To see the number of risers, divide the total rise by a riser height that works for you. For instance, convert this to a decimal if you like a 7 1/2" riser. 7 1/2" = 7 + 1 ÷ 2 = 7.5 inches.
