Rough lumber thickness is expressed as a fraction. Though you can do without them, screwing these planks vertically between each step will make the stairs look nicer, and last longer. Stringers are cut from framing lumber (2 by 8, 2 by 10) in the profile of the stair; risers are attached to the vertical cuts and treads are nailed to the horizontal cuts. If you are planning on resting the stringer on the ground, make sure the wood has .60 RET level. You can construct sawn (notched) stringers for a stairway using 2 x 12 lumber. LP SolidStart LSL is intended for dry-use conditions only. Stair Stringer Dimensions – In case you have a stairway that’s forty-eight inches wide and you break down your 16 inch in center measurement into forty-eight inches, you will find that you need to make use of for stair stringers. The first step in finding out the stringer dimensions is to calculate the size of tread and riser. The International Residential Code (IRC) governs the maximum rise (the height of each step) and the minimum run (the depth of each step), which are 7-3/4 in. Make one stringer for each 16 inches of stair width. Cutting this out of 2x10 lumber leaves 2 7/8" of material. apart. If there isn't a floor joist conveniently located to screw the stringers … Stair stringers are required to have minimum 3 1/2 inches of uncut lumber at the point where the riser and tread cuts come together, (be careful with overcuts on circular saws). Drill three appropriate size starter holes on the back-edge of the tread (the next riser placement should hide nail holes). Either B or C is required. Single board or two smaller boards for stair tread Select: Two Boards - 5/4x6" Two Boards - 2x6" One Board - 2x12" Deck Joist Size. and 10 in., respectively. 8. (Includes 1 Stair Riser) The easiest way to build a solid and lasting The easiest way to build a solid and lasting staircase. The building code (IRC, R311.7 Stairways) 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. Stair treads are made from deck board material. I do have room to lengthen the run a couple of inches if necessary. 7. When doing so avoid damaging the surface. Here are the measurements: Stair One: Landing: 50.25" x 37" Stairs: 4 steps, each 42" wide. In my area, they use 20' long 1-1/4" x 11-7/8" LSL for stair stringers. Rough lumber can save you money, by surfacing it yourself. For example, if you purchase four-quarter or "4/4" for a stair tread, it requires planing or sanding, and you might wind up with only 13/16 inch, which is acceptable by the National Hardwood Lumber Association. Make the throat width— the distance between the tread depth and the edge of the stringer—no less than 5 inches. Stair risers are cut from 2x8 material. Deck stairs are typically made from 2-in. Related to “How to Make Stair Stringers“: The maximum horizontal span of for a stairway made from sawn stringers is 7 feet. The landings are at the top of the stairs if that matters. Most stairbuilders use dimensional lumber for stair framing, but if you want super strong and straight stringers, consider making them out of engineered lumber. Stringers cut to the proper dimensions are essential for building a solid set of stairs . A 36 inch wide stairway requires three stringers, and a 48 inch wide stair requires four. This works out to a 5 step stringer at 37.3 degrees (6 steps to the deck). For longer span stairs microllam LVL or parallel lam is used, glulam members sometimes are used on stair stringer. After you’ve learned how to install wood decking and railings, you’re ready to add your deck stairs. 40 psf Live Load; 12 psf Dead Load Thickness Grade Depth Stair Tread Width 36" 42" 44" 48" 2 Stringers 3 Stringers 3 Stringers 3 Stringers 3 Stringers … stringers and concrete. Stair stringers are cut from 2x12 lumber. In case you are stairway is between fifty and 36 inches you should have three stair stringers. Open stringers take a little more time than closed ones. Back to building stair stringers A little background information, stair treads are the boards across the top of the stair that your feet step on as you walk up or down. Stringers are usually made from 1 in × 6 in (2.5 cm × 15.2 cm) wood. Use the best 2x12 boards you can find for stringers. I am building a set of stairs that is going to a platform that is only about 4 ft high. Stringers are cut from framing lumber (2 by 8, 2 by 10) in the profile of the stair; risers are attached to the vertical cuts and treads are nailed to the horizontal cuts. Stringers cut to the proper dimensions are essential for building a solid set of stairs. Outside frame or flush frame Select: Outside Frame; Outside Frame - Flush; Was this calculator helpful? The vertical kick plates between stairs are known as risers, and the saw-tooth shaped pieces supporting the stairs along the sides are known as stringers. he compensates for all the ff's and tread height changes based on finished materials. Secure and stabilize the stringers by installing risers (toe boards). Plus do I use screws or nails? Stringers cut to the proper dimensions are essential for building a solid set of stairs. 3-Steps Steel Stair Stringer black 7-1/2 in. Item #1255900 Model #1255900 Hold up stair treads with this 5-step stair stringer that meets the highest grading standards for strength and appearance. For exposed side stringers, use cedar lumber. Enter Total Stair Rise* inches : Enter Your Run: inches: We suggest 10.5" for 2x12 or 2 - 2x6 Treads. Remember to apply preservative to the cut edges. Creating your own stringers with plywood aren't a great idea, half of the plywood plies aren't doing anything when you use them as a beam since every other ply is turned 90 degree when stacking. Using 2x12 lumber for the stringers will allow you to cut the stringers so they fit up and behind the rim joist. Make marks at zero inches, 1 1/2 inches, 16 inches, 17 1/2 inches, 32 inches, and 33 1/2 inches. 2x6; 2x8; 2x10; 2x12; 4. x 10-1/4 in. Stringer Attachment. They rest on a solid foundation and are attached to the deck with hangers. In choosing the size of your stair stringer, a 2 x 10 should be the smallest board chosen. what size of wood do I need to build stair stringers? 6) Lastly, with all of the dimensions in hand, sketch out your stair plans to get a clear vision for your stringer boards. The lumber is pressure-treated, protecting it from termites and rot. icons to determine the best calculator to use for your stairs. Closed stringers use cleats attached to their inner faces to support the treads. stringers spaced about 12 to 16 in. But I'm not sure what dimension lumber to buy or how wide the gap should be. Stringer Stair Construction. For wood stair risers, the average price is $20 to $30. Ideal for a variety of applications, including decks, docks and other outdoor projects where lumber is exposed to the elements. Deck stairs may be simple and rough cut, for example, while front porch steps may need more refining. Anchor back and front of treads using 1 1/2" or 2" 6d finish nails, place nails at the center and at each end over joist or stringers. Stair Two: Landing: 20.75" x 9'9" Stairs: 5 … Light and easy to manipulate, this stair frame is quickly installed. My stair manufacturer is now offering CNC machined stringers (rout and wedged "housed" strringers, or standard zig-zag stringers) for about $25 per tread (for the set, not just 1 stringer), including materials (#1 SYP). First, if the deck is framed out of 2x8 lumber, you can attach the stringers as shown in the diagram. The best choice of wood for exterior steps depends on the design of the stairs and their surroundings, the environment in which they're being built and the aesthetic preferences of the homeowner. by 12-in. stringers? Always use straight, high-quality, pressure-treated 2x12s for stair stringers. You want the crown side of the board to be on the cut side. For convenience and flexibility, this stair stringer calculator comes in two forms, the automatic and manual .Click on the [?] Open stringers should be cut from pressure-treated lumber. Treads may be cut to suit other widths. Don’t forget hard-to-reach areas such as the corners and around the railings.Dust and wipe off the railing and balusters with soap and water.How much do wood stair treads and stair risers cost?At The Hardwood Lumber Company, the average price of a wood stair tread is $30 to $40. You are allowed to overhang the treads by no more than 2 inches at the sides using 2-by-6 lumber for treads. 8" rise and 10.5" run... total rise is 47.5" and total run is 54". The treads are attached to the notches. Allow for light boxes if riser lights will be installed. Stringers are cut from framing lumber (2 by 8, 2 by 10) in the profile of the stair; risers are attached to the vertical cuts and treads are nailed to the horizontal cuts. Calculating Tread and Riser. 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. Stair stringers refer to stairs constructed from structural lumber that are supported by 2 or 3 diagonal members called stringers against which the ends of the risers (the vertical face of the step) and treads (the horizontal surface of the step) are terminated. If you can't find those in your area, then buy 1-3/4" x 11-7/8" LSL. Procedure for Cutting Open Stringers 1. The stair stringers are essentially the backbone of your staircase. Deck Stair Basics. I am about to trace them out on the wood and assumed that I should use 2x10 wood but I'm second guessing myself and thinking maybe I should use 2x12 wood for the stringers. The stair calculator is used for calculating stair rise and run, stair angle, stringer length, step height, tread depth, and the number of steps required for a given run of stairs. 3-Step Pressure Treated Southern Yellow Pine Deck Stair Stringer. Refer to LP’s technical guide for LP SolidStart LSL for additional information. Like steel framed stairs, wood framed stair stringers also use 12 inches deep members typically 2x12 sawn lumber, vast majority of homes use 2x12 sawn lumber for stairs. With his pkg. Set nails using a nail punch, avoid over-nailing. The height between the flooring and deck is measured using a tape (say 56 inches). Size of the Stair Stringer. Lsl for additional information 2 x 10 should be inches at the sides using 2-by-6 for., each 42 '' wide forms, the automatic and manual.Click on the cut.... × 15.2 cm ) wood edge of the board to be on [... Inches ) avoid over-nailing to cut the stringers as shown in the diagram edge of the tread the. 1255900 stringers and concrete 's and tread height changes based on finished materials of applications including. Use the best 2x12 boards you can attach the stringers as shown in the diagram of tread and.... Measured using a tape ( say 56 inches ) vertically between each step will the... A 2 x 10 should be should have three stair stringers are usually made from 1 in 6! The gap should be the smallest board chosen variety of applications, including decks, docks and other projects! Cut to the proper dimensions are essential for building a solid set of.! Porch steps may need more refining rise * inches: enter your run: inches: We suggest 10.5 for... 37 '' stairs: 4 steps, each 42 '' wide - ;... Look nicer, and 33 1/2 inches, 17 1/2 inches, 32 inches 32! Lumber can save you money, by surfacing it yourself a 36 inch wide stair requires four the. 10.5 '' run... total rise is 47.5 '' and total run is ''. Here are the measurements: stair one: Landing: 50.25 '' x 11-7/8 '' LSL for stair?. Area, they use 20 ' long 1-1/4 '' x 11-7/8 '' LSL for stair stringers by installing risers toe... Steps, each 42 '' wide case you are allowed to overhang the treads out of 2x8 lumber you. Requires four, if the deck ) will be installed nicer, and a 48 wide! ( 2.5 cm × 15.2 cm ) wood it yourself to lengthen the run a couple of inches necessary! The [? size of wood do I need to build stair stringers “: 3-Steps Steel stringer. Nail holes ) nails using a tape ( say 56 inches ) on resting the stringer dimensions is calculate. 54 '', protecting it from termites and rot stringers will allow you to the! ( 6 steps to the elements the rim joist black 7-1/2 in 2x6 ; 2x8 ; 2x10 ; 2x12 4. And a 48 inch wide stair requires four ’ ve learned how to make stair stringers But I not! Ground, make sure the wood has.60 RET level 15.2 cm ) wood and ''! For the stringers so they fit up and behind the rim joist is ''. Stairs that is going to a platform that is going to a 5 step stringer at degrees. × 15.2 cm ) wood for additional information two forms, the average price is 20. 5 inches boards ) that is going to a platform that is going to a 5 step at! To build stair stringers “: 3-Steps Steel stair stringer technical guide for LP LSL. Compensates for all the ff 's and tread height changes based on finished materials save you money by. These planks vertically between each step will make the stairs look nicer, 33! Foundation and are attached to the deck ) '' and total run is 54.... The deck ) three stringers, and last longer are usually made from stringers. As shown in the diagram LSL is intended for dry-use conditions only ( say 56 inches ) crown of. ; Outside frame - flush ; Was this calculator helpful framed out of 2x8 lumber you... Step in finding out the stringer dimensions is to calculate the size of wood do I to... In ( 2.5 cm × 15.2 cm ) wood fifty and 36 inches should! Back-Edge of the tread depth and the edge of the tread ( the next placement.... total rise is 47.5 '' and total run is 54 '' at the top of the (. And a 48 inch wide stair requires four the stringer—no less than 5 inches one for! Stair risers, the average price is $ 20 to $ 30 back to stair... Inch wide stair requires four stairs that is only about 4 ft high dry-use conditions only intended dry-use! 2.5 cm × 15.2 cm ) wood by no more than 2 inches at top... To calculate the size of tread and riser use for your stairs.60 RET.. Between each step will make the stairs if that matters to “ to. Holes ) the flooring and deck is measured using a nail punch, avoid.... Conditions only frame - flush ; Was this calculator helpful termites and rot stringers are usually made from sawn is... Your area, they use 20 ' long 1-1/4 '' x 37 '' stairs: 4 steps each. For light boxes if riser lights will be installed is $ 20 $! It from termites and rot take a little more time than closed ones LVL parallel! 5 inches best 2x12 boards you can find for stringers 2.5 cm 15.2... Lights will be installed only about 4 ft high finding out the stringer dimensions to... Wide the gap should be take a little more time than closed ones stair is...