fire treated lumber and IPE. HD is carrying fire treated lumber but not sure about the exterior part of it.Has anyone built a deck with the bottom requiring a 1 hr fire rating?
The deck will be less than 4' off the ground.
Roughly 20 square fee, its just the rear entrance.
http://www.archchemicals.com/Fed/WO...on/properties.htm?selLocation=fire.htm#spreadFire retardant treated wood has a surface burning classification and, by itself, does not have a resistance rating in hours any greater than untreated wood. Fire ratings in hours are assigned to door, wall, or deck assemblies following testing in accordance with ASTM E 119 and E 136. The references such as the Underwriter Laboratories "Fire Resistance Directory" specifically points out that FRT wood may be substituted for untreated wood in any related assembly. Dricon FRT wood can be used as a component of such assemblies in structures where the code does not permit the use of untreated wood.
Ok I guess I'm wrong. Did find this pdf NYC I did read somewhere there it was rates class A http://www.nyc.gov/html/dob/downloads/pdf/409-03-m.pdfActually, everything written here by all the respondents, including myself, is wrong. Metal studs and pavers do not have a fire rating, they are just considered non-cumbustable construction. Ipe most certainly does not have the fire rating of concrete, while it has a low flame spread, it is a combustable product.
Fire rating is an assembly. 5/8" GWB has no fire rating until it is part of an assembly of building materials including fasteners and framing materials.
Why does the inspector say the underside of the deck needs a rating? What kind of construction is this? Are there plans and how did this mistake get past review?
Perhaps look into making the deck out of all timbers?West wall of the building is the property line. The deck is less than 5' from the property line.
Probably intumescent paint. It's what's applied to spray foam insulation for a fire resistant coating.I don't remember who makes it but there is a 1hr coating that can be sprayed directly onto combustibles (it looks like rhino liner for a truck bed). It was pretty expensive for a couple thousand sq ft.. For some reason it was an insulation company who offered it.