Most building codes require deck railings to be between 36 inches (91 cm) and 42 inches (110 cm) high. The posts' extra height above the railing is just for looks. An inch or two higher than the railing will look nice.
The IRC requires guardrails to be at least 36" in height, measured from the deck surface to the top of the rail. Commercial decks attached to multi-family buildings, such as apartment buildings or businesses, are regulated under the International Building Code (IBC). The IBC requires 42" high guardrails.
Q. I'm building a deck that's less than 30 inches above grade, so a guardrail isn’t required by our local building code. However, the owner on this project wants the deck to have a railing for aesthetic reasons.
These building codes for handrails on stairs and guardrails around walkways are based on information in section R311.7.8 on page 61 of The 2012 International Residential Code. It is important to note that all designs and any construction methods must be solid.
Sturdy deck railings are an important safety feature for raised decks and are required by code for any deck 30 in. or more above grade. Building codes define the minimum height and strength of the railing system, as well as the size of gaps in the railing – they must be small enough that a small child cannot slip through.
These deck railing height diagrams are a great reference for your design and building portfolio. They include the actual height of the rail above the deck, the height above grade when a guardrail is required and important baluster spacing dimensions.
Cable deck railing code requirements aren't different from other railings codes, but because of the nature of cable, it can be trickier to meet code.
Only a few provisions in the International Residential Code specifically relate to building a deck. (The International Code Council is currently forming a committee to develop an appendix to the IRC that addresses deck construction.) For many specifications, like those for spans and guardrails, you have to apply general code requirements.
The IRC requires guardrails to be at least 36" in height measured from the deck surface to the top of the rail. Commercial decks attached to multifamily buildings, such as apartment buildings or businesses, are regulated under the Internation Building Code (IBC). The IBC requires 42" high guardrails.
This part of the deck project shows you how to install wood decking and railings. ... local building codes. ... and add the railings in How to Build a Deck: ...
How to Build Code Compliant Deck Railing – Part 2 I purchased 2×2 inch by 8 feet long #2 grade pressure treated Southern Yellow Pine lumber, measured and sawed the pickets. The pickets are cut to span the distance from the 2×4 top rail to the 2×4 bottom rail with a 25 degree angle bottom cut for a drip-edge.