Handrails shall be mounted so that they can withstand a 50 pounds per lineal foot load applied at any direction and transfer this load through the supports to the structure (commercial and commercial residential requirement), or a 50 pounds per lineal foot load single point concentrated load (residential requirement).Handrails are also required to be extended a minimum of 12” beyond the ends of the ramps and to return to a wall, guard or the walking surface. Handrail Height (Commercial including Commercial Residential Occupancies) is required at both sides of the stairway, shall not be less than 34” and no more than 38” above the nosing of the tread or landing.Handrails adjacent to a wall shall have a space not less than 1 ½” Handrails ends are required to terminate by a newel post of safety terminals (return to the wall). Handrails shall be continuous for the length of the stairway. Handrail Height (Residential) are required to be on at least one side of the stairway, shall not be less than 34” and not more than 38” above the nosing of the tread.Type II are handrails that have a dimensional perimeter greater than 6 ¼” require a finger recess area on both sides of the profile (contact your Building Official for more information). If not circular shall have a perimeter of dimension of at least 4” and not greater than 6 ¼” on one side and have a maximum cross sectional dimension of 2 ¼”. Type I have a circular cross section shall have a diameter outside of at least 1 ¼” and not greater than a 2”. Handrail grip size is either Type I or Type II.Handrails on top of guards: Only have dimensional requirements when they are applied as open sides of stairways and are used as the required handrail.Handrails for residential differ from handrails for commercial projects. The second is that the triangle of the tread riser and the bottom rail cannot pass a 6” sphere. This allows for a two baluster per tread method of construction. Please note that there is two exceptions to this 4” rule and that is for the guard on the open sides of the stairs where the space cannot pass a 4 3/8” sphere at the balusters. Guards shall be constructed such that a 4” sphere cannot pass. It is required to be constructed such that it can withstand a 200 pound force at any point on the rail (R301.5 – note d), Railing (defined in the codes as a “Guard”) is required to be a minimum height of 36”. This also applies to the open sides of stairs that are over 30” above adjacent floor or grade. Guards (Railing) are REQUIRED at all porches balconies, ramps and raised floor areas that are 30” above the floor or grade below). For NEW (and as may apply to remodeling) Construction of Residential the following are the specifics. Current Codes for residential and commercial differ. Give us a call today at 33 or visit our website heights and Baluster spacing is one of the more common code questions and often one of the items that typically fails the inspection. Most deck builders prefer this rail type for is simplicity and functionality above all others for wood rail construction.ĭeaton Builders can provide options and design ideas to fit every budget. The pickets can be considerably shorter because they don’t need to be individually attached to the deck rim and they are raised off the floor. Many builders run a 2圆 top cap continuously over the top of the posts and top rail to provide a clean finished edge and the practical purpose of providing a surface to set glasses, etc. Rail posts need to be properly fastened and should not be spaced more than about 6 feet apart to prevent a saggy or bouncy rail. Rail posts are attached to the deck frame and support the infill sections. This popular rail style leaves a 4” space below the bottom rail to allow for snow and debris to be swept off the deck surface. Make sure your sweep space and all infill openings will not allow a 4" sphere to pass through. This must be at least 36" high to meet IRC requirements. Maximum walkway surface height is 30' above grade without guard rails. 4 × 4 wood knee braces are permitted to be provided on each column in both directions. Measure from the deck floor to the top of the rail between posts. Lateral bracing is not required for freestanding decks with a deck floor height 30 inches (762 mm) or less above finished grade. In either case, you can build taller guardrails as long as they conform to all other requirements stated in the code. Commercial decks attached to multifamily buildings, such as apartment buildings or businesses, are regulated under the International Building Code (IBC). The IRC requires guardrails to be at least 36" in height measured from the deck surface to the top of the rail. Decks attached to single-family detached homes are regulated under the rules of the International Residential Code (IRC). If you choose to install a guardrail on a deck lower than 30", you must still meet code requirements. All decks greater than 30" above grade must have a guardrail.
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