The guardrails must be strong enough to withstand a concentrated 200 lb force anywhere along the top of the rail. In California, deck railings are required to be a minimum of 42″ tall measured from the deck surface to the top of the guardrail. The top edge of the handrail must be placed between 34” and 38” above the nosing of the stair treads. Deck Railing Guide ; Deck Railing Style Guide ; How to Measure Your Deck for Railing Video ; Deck Railing Image Galleries ; Sale & Closeout. Maximum joist span of a 2X8 is 10’ – 6” at 16” o.c. Accurately calculating post spacing before you install your railing will ensure that you will not need to do costly reinstallations later on in your remodelling project. How to Calculate Railing Post Spacing. Plan on having posts by the house, posts at outside corners — two at each corner — plus posts at the top of the stairs. 1. For argument sake let's say the deck is 24' long. Stairs. spacing between the cap rail and the railing section below, fasten 2×4 blocks with 2-1⁄2-in. Divide the length of your railing to create sections of equal lengths between five and seven feet; the thicker your railing posts, the longer you can make the subsections. Sometimes local building codes will have more stringent regulations, so check your local building department for post spacing requirements. Measure the distance between posts at two corners and divide by the distance allowed between posts. your own Pins on Pinterest. As a result, the post spacings for a railing will vary as will the length of the railing section that fits between each post. Minimum stair railing height has to be 34” from the top rail to the nosing. Rail posts (also referred to as Guard Posts) are generally spaced evenly between straight sections of deck. Measure and mark locations for rail height. A “cantilever” is the unsupported end of a joist that extends past the last support post at the edge of your deck. Deck railing height standards can vary from state to state but typically require a 36″ or 42″ railing. For a composite railing system, slide the post sleeve over the wood post, then the post sleeve skirt over the post sleeve; both should rest on the decking. Discover (and save!) A circular cross section of a handrail must have an outside diameter of between 1-1/4” and 2”. That’s how many railings you’ll need, then simply space them evenly between corners and your home. Building Code Deck Railing Post Spacing Requirements According to the International Building Code, deck railing posts should be spaced no further than 6 feet apart. Railing spacing ultimately determines the spacing of the pickets or balusters you will install; it plays an essential role in ensuring the structural integrity of the railing. Drill two 1/4 inch holes through the base of each of your posts using a drill, then attach the posts to the deck with bolts or screws using a screwdriver. May 31, 2019 - This Pin was discovered by Basic Deck Designs. And a top rail 2x4 with a 2x4 top plate to cap it off. Written on: July 14, 2020. deck with a view image by Bruce Shippee from Fotolia.com. Such calculators allow you to calculate the spacing of your posts using the width of the posts, the length of the area to rail and the size of the balustrades. 200 pound point load applied at the top of the post in any direction, or at any point along the railing. Flat 2x4 and 2x6 handrails are not acceptable. If you choose to install a guardrail on a deck lower than 30", you must still meet code requirements. Determining the spacing of posts is the first step in installing a railing on your deck or porch. Post Spacing Guidelines Space posts no more than six feet apart or follow your local code requirements. 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