Each guardrail system that does require the use of supporting posts will specify the required post interval or spacing.  "The Elimination of Unsafe Guardrails, a Progress Report," Elliott O. Stephenson. 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. That's because the withdrawal force of the nails is not very great. So your guardrail needs to be able to withstand the required loads, such as a 200 lb. Nearly half of these injuries are serious enough to require time off the job--11,570 lost workday injuries and 13,312 non-lost workday injuries occur annually due to falls from stairways and ladders used in construction. Web search 09/02/2011,original source: www.dir.ca.gov/title8/3209.html. We have no relationship with advertisers, products, or services discussed at this website. These data demonstrate that work on and around ladders and stairways is hazardous. The lengths of each side of a deck often vary. For example if you simply through-nail the rim joist to the ends of floor joists and then bolt your deck post (or nail or screw balusters without deck posts) to the rim joist, a load applied to the top of the guardrail pushes on the posts (and balusters if they're nailed to the rim joist). 1. Using a 2×4 gives you perfect alignment. even where disabled individuals are not the design target.  Ralph L. Barnett* and William G. Switalski, "Case Study If you have multiple panels of un-equal length, you'll need to adjust the 2 end spacings on each panel to maintain correct spacing. Our page top photo shows an odd guardrail along a tiny walking space - the DIY owner-installer never considered that someone (a housepainter) might actually need the railing to be secure and functional. My plan was to pour concrete footings, then run doubled up 2x8 beams setting on the footings, My wife is a stroke victim, and she wants this deck to be as easy as possible for her to walk out on. 126. Reminder: IRC Table R301.5 (Minimum Uniformly Distributed Live Loads) note d requires the guard to support a 200-pound concentrated load at any point along the top. I'm burying 4x4 posts in Concrete as I did with my large fence. To meet the deck railing height and space dimensions stated by the code, it’s important to have handy tools. b. A railing is one of the most visible parts of a deck, but it's also a key safety feature. The deck post spacing will ensure you can enjoy the outdoor area for decades. Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the, Decks and Porches, the JLC Guide to, Best Practices for Outdoor Spaces, Steve Bliss (Editor), The Journal of Light Construction, Williston VT, 2010 ISBN 10: 1-928580-42-4, ISBN 13: 978-1-928580-42-3, available from Amazon.com. www.triodyne.com, web search 02/04/2013, original source: http://www.triodyne.com/SAFETY~1/Sb_v18n1.pdf, copy on file as BarnettSwitalski_Railing_Study.pdf. Local building code inspector may require posts: Even when guardrail system manufacturers do not specify details about how posts shall be installed or secured to the structure, typically the instructions will say that the guardrail and posts (if included). 4. The subrail/top rail assembly resists the tension loads that the cables place on the posts. Type of Post.  Steps and Stairways, Cleo Baldon & Ib Melchior, Rizzoli, 1989. STAIRS. The model building codes certainly permit some guardrailings to be constructed without posts. Learn how to build and install deck railings in our comprehensive video. If those test loads can be met by the way the guardrailing's balusters are installed I don't think a building code inspector must object. That might typically be six feet but there is not a universal 6-foot post spacing rule. Place a 2×4 lengthwise against the wall or first rail post. The posts may be spaced on 8-foot centers if the top rails consist of double 1-inch by 4-inch nominal boards, provided that 1 board is fastened in a flat position on top of the posts and the other is fastened in an edge-up position to the inside of the posts and the side of the top board. See GUARDRAILS on BALCONIES, DECKS, LANDINGS for more details of guardrailing codes and specifications. All Rights Reserved. So your guardrail may might be required to use posts by code (though depending on the guardrail design and specific product being installed posts might be required by the manufacturer of that system). There are some minor differences. Not all guardrail systems are designed to permit installation without supporting posts. Details about how to install secure posts to support deck or porch guardrails or stair guard railings are now found at RAILING POST CONNECTIONS. H1 Hurricane Tie: Holds joist on both sides. All posts, except the last post will be evenly spaced. Attaching Deck Railing Posts The problem is that the railing post acts like a lever, exerting a very large force on the connection at the bottom. American National Standards Institute, approved February 16, 1968. After the railing is installed, sand all the corners smooth. Post Anchors are made to support a maximum raililng height of 42 inches. Plan on having posts by the house, posts at outside corners — two at each corner — plus posts at the top of the stairs. Determining the spacing of posts is the first step in installing a railing on your deck or porch. Association, approved May 3, 1932. include a floor plan of the deck and the existing dwelling and show the following information: a. Follow the best practice to include three balusters for every foot of railing the dwelling factors mind! The rail structure not all guardrail systems are designed to permit installation without posts. A 2×4 lengthwise against the Wall or first rail post span should exceed... Center of each side of a 2X8 is 10 ’ – 6 ” at all above! Lengthwise against the Wall or first rail post construction method will meet those requirements blocking the! Be no more than 4 '' withstand the required post interval or spacing backyard. Center of each side of a 2X8 is 24 '' ( 1829 mm ) - measured the. 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