What load, spacing and span does that represent? Btw, you know the span is the horizontal distance, not the length of the stringers. Think of it as a ladder leaning up against a wall. I see recommended maximum span horizontally but nothing on maximum or minimum number of stringers on center.
Fig 28 and OK Lee Sam, but I didn't say anything about length of stringer in my answer; obviously it's on your mind though. Dude Lee, I respect your input on this forum so if you have better guidance please post your own better answer Actually you do refer to the length of the stringer several times.
I guess my point is the design of the stairs should be based on total structural design. Rather than pick one item like stringer spacing and saying this is the correct spacing, etc. The Prescriptive Guide you refer to is old and out of date and has errors for current construction like size of holes for safety.. Obviously there are options for longer spans. Show 1 more comment. The Code requires a stair to be designed to 40 psf.
Lee Sam Lee Sam Wouldn't it be pounds per linear foot? Or is that 45 psf at 16"OC? P The Code requires 40 psf live load Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Before an inspection has been performed we don't know if the deflection of the stair stringer to which you refer is due to damage rot for example or a design inadequacy.
Here is a model building code citation for stair stringer support requirements for residential stairs using the IRC. Individual stair treads shall be designed for the uniformly distributed live load or a pound concentrated load acting over an area of 4 square inches, whichever produces the greater stresses.
As an alternative to the requirements in Section R Where engineered design is used in conjunction with these standards the design shall comply with the International Building Code. On by mod - How many stair stringers do I need on a deck that is 10ft long. Dwayne Please forgive me but as you phrase the question I don't know how to answer it. The number of stair stringers that you need because on the dimensions of the lumber used, the width of the stair, and whether or not there can be intermediate support beneath the Stringer.
Scott Simpson and others make framing connectors specifically designed to give a safe, proper structural connection between the stair stringer and the deck often to a rim joist provided the rim joist itself is adequately secured. Do not use deck board screw, use structural screws sold specifically sized to work with structural connectors. Shown below, quoting from Simpson The LSCZ adjustable stair-stringer connector offers a versatile, concealed connection between the stair stringer and the carrying header or rim joist while replacing costly framing.
Field slopeable to all common stair stringer pitches, the LSCZ connector is suitable for either solid or notched stringers. Suitable for exterior applications. Use all specified fasteners. Before fastening, position the stair stringer with the LSC on the carrying member to verify where the bend should be located.
Tabs on the LSC must be positioned to the inside of the stairs. The fastener that is installed into the bottom edge of the stringer must go into the second-to-last hole. As such, it is recommended the LSC be installed with the tabs positioned to the outside of the stringer. NOTE: The correct fasteners installed in the correct position must be used to achieve published load values.
Can I use a galvanized stringer support to attach stairs to my deck. They would be deck screwed into a 2x10 joist. The stringer is a 6 step. Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. Note: appearance of your Comment below may be delayed: if your comment contains an image, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator.
Apologies for the delay. Just ask us! Search the InspectApedia website. Comment Form is loading comments This book is unique in that it is entirely devoted to falls. Of use to primary care physicians, nurses, insurance adjusters, architects, writers of building codes, attorneys, or anyone who cares for the elderly, this book will tell you how, why, and when people will likely fall, what most likely will be injured, and how such injuries come about.
Similarly, what is the code for stair stringers? The building code IRC, R Yes, the stringers need to be supported along their length, but they can span a few feet too, depending on 1 the width of the stairs , 2 the number of stringers , and 3 size of riser board. Ideal for a variety of applications, including decks, docks and other outdoor projects where lumber is exposed to the elements.
When used properly, it is both safe and environmentally friendly. Use 10d - 1. Make sure the top of the stringers are level. Nail the stair stringer connectors into place. Then, nail the 2x12 stair stringers to the connector side flange and bottom. The riser helps support the tread. For wider stairs , add one or more evenly spaced stringers depending on the width of your stairs and the tread material you choose.
Always check the maximum span for your decking material as it applies to stair treads. Now, some common code requirements, along with our recommendations: - The stair treads should be at least 36 inches wide.
But, we recommend that stairs should be at least 48 inches wide so they don't feel cramped. We usually limit the weight to 1, pounds of safe weight. Since we are using a machine, we can get away with going on the high side, since there isn't much movement on the stairs. Our LVL is then bonded with waterproof adhesives under pressure and heat, making it strong, solid and straight. A stair stringer also called 'string' or ' stringer board' is the housing on either side of a flight of stairs , into which the treads and risers are fixed.
A staircase will have two stringers , one on either side of the steps. Cut a 2x6 board to fit snugly between the two stringers at their base. This will be used to fasten the stairs to the concrete pad.
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