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Concentrated Load Test: The top rail must be capable of holding a point load of 500 lbs.Uniform Load Test (for IBC applications): The top rail must be able to sustain 125 lbs./foot length of force applied horizontally or vertically.Two sides of steel platform rail at 36' height. Infill Load Test: The strength of the balusters are tested so that a one-square foot area must resist 125 lbs. This Duvinage Chicago KS60 stair kit is specifically configured for deck applications and includes: Steel diamond plate 30 treads.If you are using a circular cross section, then the handrail must have an outside diameter of between 1-1/4” and 2”.Įngineered railing systems must be tested and certified to meet IRC and IBC building codes. Flat 2x4 and 2圆 handrails do not meet the requirements for graspable handrails. A variety of gripping shapes may be acceptable but must meet requirements for the gripping surface. The handgrips must allow a minimum of 1-1/2” space between the handrail and the guardrail or wall.
Chicago outdoor stair rail code code#
The IBC commercial handrail code states that each stair is provided with a separate handrail or grabrail attached to the guardrail.
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Handrail ends must be returned and terminated at rail posts. IBC handrail code requirements for commercial stairs. The top edge of the handrail must be placed between 34” and 38” above the nosing of the stair treads. Handrails are required for stairs in many applications and must meet standards as specified by R311.5.6.3 in the IRC code. The sweep space between the deck surface and the bottom rail must be less than 4". To achieve this, you should check to make sure you meet the post spacing requirements for the type of posts you are using and how they are attached to the deck. There is also a safety factor required by the code, so testing loads are higher for manufactured railing systems. force anywhere along the top of the rail. The guardrails must be strong enough to withstand a concentrated 200 lb. In the case of guardrails for stairs, there is an exception that allows up to a 6” diameter sphere through the triangle opening formed by the stair riser, stairtread and bottom rail. It is a perfect installation from the first floor which comes till the lawn, with a small balcony at the top. A variety of styles are allowed as long as the interior sections of the rail don’t possess any openings large enough to pass a 4” diameter sphere through. This outdoor staircase is pure elegance, as it is made up of 100 pure timber and is supported with metal frames.