This article discusses fire safety in an interior staircase.
With regard to home fire safety in residential building plans, a lot of coded code is made of fire walls and floors, but not a lot about stair design and stair construction .
Comment: This coded type even includes fire safety at home with regard to the structure of the stairs. See IRC 2003, R311.2.2 "Under the stairs, the accessible space under the stairs must have walls, under the surface of the stairs and soffits protected on the closed side with a ½" gypsum board (12, 7 mm). For fire safety in the design of stairs and the construction of stairs, it is a start. Note, please, that there is no mention of fireproof gypsum board and heavier materials as mentioned elsewhere – and for a long time – for surfaces. of garage walls and ceilings contiguous to the living space
And there are high-value references to smoke alarms in the nationwide home fire safety building codes, references albeit with minimal levels of materials and methods, according to the author.
How to: Minimums? That's what this custom house designer thinks. You will find below the stipulations of the designer's home plan that can be written in smoke alarm methods and materials to increase the codified fire safety minimums at home. Each alarm must operate on both a 120 V permanent battery and a replaceable battery. It must include a combination of ionization and photoelectric sensors. None should be disconnected by a wall switch. Each must connect to a 120V line as the first charge on a frequently used lighting circuit with overcurrent protection at the panelboard for a dual connection. For rest areas, an alarm shall be installed in accordance with the manufacturer's specifications on each side of the passage between a sleeping area and an escape route
HOME FIRE SAFETY – STAIRCASE DESIGN AND CONSTRUCTION STAIRS PROLOGUE
In a burning house, a residential interior staircase can cause two events: the passage of the two occupants to the security and firefighters for safety reasons and the passage of smoke and fire. the flame between the floors.
Comment: One might think that the design of interior stairs and the construction of stairs, this key place of the interior structure in the interior fires – good (human transport) and bad (transport of smoke and fire) – are largely abandoned competent authorities
WHAT TO DO?
With regard to stairwells, it is the construction of staircases and staircases, which is at stake, that is the construction of. fire-damaged stairs, wooden posts and wooden ceiling joists that collapse.
FIRE SAFETY AT HOME – INTERIOR STAIRCASE DESIGN FIRE SAFETY DIRECTIVES
A residential interior staircase, other than a spiral staircase – under the stair rail must be sheathed exterior stair slats to exterior stair slats, including battens with at least 1 layer of 5X gypsum board, glued, screwed and sealed, 5/8 "or more At least 3 coats,
When walls pass underneath or just beside exterior stair rails, they should be framed with light or cold-formed walls. on the outside with 1 x 5/8 "Type-X gypsum board glued, screwed and sealed. It must be mudded no less than 3 layers, paying particular attention to the screw bolts that must be attached too.
If the continuous envelope of Type-X can not be applied on the vertical below a staircase, the cold-formed steel must cover the inside of two layers 5-in. x 8-in. gypsum board, glued, screwed and sealed and, if applicable, covered with a 1 5/8 "Type-X plasterboard, screwed, and taped. It must be mudded no less than 3 layers, paying particular attention to the screw bolts that must be attached too.
Where the stairwell stretches over a stringer staircase such as, for example, a mid-landing stairwell, the stairwell Contractor must frame the lightweight or cold-formed steel wall. The frame must be lined with two layers of 5/8 "Type-X drywall and, where applicable, outside the wall with a drywall of type 5 X- 5/8 "glued, screwed and registered Coatings must be covered with at least 3 coats, paying particular attention to screwed sections that must also be sealed.
The liner must be sealed to a protrusion with fire resistant materials in accordance with ASTM E84 and E814. This sealing does not necessarily rule out the consideration of a tumescent waterproofing product under a staircase in a closet, cabinet, niche, alcove, bookcase or similar. The steel frame must be sheathed in a continuous manner, secured and mudded to all abutments before the other coating is applied, ie the first exterior cladding to the frame. 39 steel must be at least 1 layer-5/8 "Type-X gypsum board
A socket, device or high-voltage electrical appliance shall not be located below a staircase.  In sum, the steel is there to break more slowly when it is engaged, no ash and ash, the extra layers of Type-X are there to better hold its shape and hold the flames from you up or down the steps.