Building Deck Stairs To Code

Planning the location of deck stairs is a critical first decision. Stair rails on decks should be between 34 inches and 38 inches high measured vertically from the nose of the tread to the top of the rail.

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According to Section R31175 you must provide a landing for any stairway that rises higher than 12 feet.

Building deck stairs to code. 13032021 The building codes for exterior stairs establish the criteria for design use location and construction of outdoor stairs. Here are some important points. Heres a clear summary of what the IRC code says about stair rise run and nosing.

The example shown here is a cascading stair case with a single level deck. Treads must be at least 10 inches deep measuring from front to back. 19072021 At the same time staircase code measurements do allow for some flexibility since most measurements are accompanied by minimums or maximums.

The footing for the grade level termination of stairs or ramps attached to decks or landings whether the deck or landing is supported by a dwelling or not shall only be required to be placed at least 12 inches 305 mm below the undisturbed ground surface in. These are standard building codes. This will make it much easier for you to know where the best location of your stairway should be.

19072021 Requirements for Deck Stairs The code has some very specific requirements for deck stairs. If a stairway will not be used often and the lawn is flat a landing pad can sometimes be omitted. 775 inches or less than in length.

36 inches wide and 10 inches long. Where will people naturally enter or leave the deck. However there are some standards for stairs that are generally consistent across regions.

First you must learn the parts of deck stairs. 21122020 Your deck stairs design must meet residential building code requirements in order to be considered safe for use. Stair treads are the horizontal boards that you step on.

The International Residential Code IRC has specific instructions the way stairs can be built. As long as the 3-foot width standard is met you can expand the stairs width as far as you wish. Plan before you building your stairs.

Sawtooth or stair shaped cuts only. The IRC and IBC establish the exterior stair code requirements. Using pre-built stairs will usually not meet code.

If they are part of the main access route to the house they must comply with NZBC clause D1. You can purchase wood from the local woodshop. A prime example is the standard stair width.

Building codes vary by state and municipality so youll need to check with your city or town hall for your local code requirements. If your deck is more than 30 inches off. Not every municipality adopts every part of every code and some cities and states add in.

13072015 The deck we build in this article is approximately 20 inches off the ground and as a result is not required by code to have a railing system on the steps or deck. A landing pad is a flat surface made of concrete pavers or gravel at the bottom of the steps. 23092019 Common Building codes Before you start your construction find out the local building codes and rules.

DESIGNING AND BUILDING OUTSIDE STAIRS External stairs on the access route into a house may provide access to a deck or across a sloping site. IBC Exterior stairs code requirements. The IRC lays out stair requirements for decks in Section R50713 and some depend on requirements outlined elsewhere in the Code.

Understanding the exterior stairs code requirements helps to ensure a safe and durable stair for outdoor use. Staircase code states that stairs must be 3 feet wide or wider. The owner preferred an open no-railing look.

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