Feb 25, 2021 · Single family home in Chicago suburbs with a second floor master bedroom suite of 600 square feet accessed via a code-compliant interior stairway to first floor, with secondary means of escape window(s) PLUS a spiral stair (diagonally opposite the door to the aforementioned interior stairway) separated from the master suite by a door.

Jan 14, 2022 · The spiral staircase is a 5' diameter kit engineered to meet the IRC requirement for an egress stairway. I have no problem insulating the space, adding smoke detectors, insulation, fire separation, and already have an emergency egress opening via the exterior door.

Oct 16, 2009 · Landings just force steeper rises and lower head clearance. Not arguing code interp but it's a fundamental problem. I'd seek a variance especially if the building otherwise met means of egress requirements without the spiral. Actually, if you include a spiral stair, it is a required means of egress for the person using the stair.

Mar 31, 2010 · If your two required means of egress is not dependant on the spiral staircase or the spiral staircase is a third option, then everything is okay - provided that the spiral staircase meets the minimum requirements mentioned above (treads, risers, width... IBC 1009.8). A slippery slide would also work well to get from the deck to the area below.

May 23, 2016 · I have an old school that is being converted to apartments, each apartment has a code compliant spiral staircase that leads from the living room to a "storage loft," except for 1. Because of an unforeseen structural component in this one unit, the largest spiral case they can install is 48" instead of the means of egress compliant 60".

Dec 14, 2011 · you are probably not going to find a manufactured spiral staircase with less than a 4.6' diameter. That leaves approximately 27" for the tread (I don't know that I've seen a handrail on a spiral stair at anyplace but the top rail of the stair). Curious why with all other stairs, the width is measured at all points above the handrail height.

Jun 11, 2012 · R311.5.4 Landings for stairways. There shall be a floor or landing at the top and bottom of each stairway. ...

Dec 7, 2010 · I've got an existing office building in CA, two stories, around 48k SF per story, type III-B. There are three existing exit stairs. No change in occupancy is proposed (was a B and will be a B). The TI that we have permitted and under construction does not …

Oct 19, 2009 · A set of plans for a commercial space proposes a spiral staircase. 2018 IBC 1011.1 requires a handrail on both sides of every flight of stairs. Exception #1 allows for a handrail on one side only for spiral stairways. And NFPA 101 Life Safety Code section 7.2.2.2.3 requires handrails on both sides of spiral stairs.

May 20, 2020 · R311.7.10.1 Spiral Stairways Spiral stairways are permitted, provided that the clear width at and below the handrail is not less than 26 inches (660 mm) and the walkline radius is not greater than 241/2 inches (622 mm). Each tread shall have a depth of not less than 63/4 inches (171 mm) at the walkline.