Is expanded or extruded polystyrene is considered 'Flammable solid', as it relates to hazardous materials in a Group H occupancy.

[Ryan Schultz]

I'm having a hard time determining if expanded or extruded polystyrene is considered 'Flammable solid', as it relates to the storage of hazardous materials in a Group H occupancy.

Can anyone point me to any literature that makes this abundantly clear? Google is failing me.


[F] FLAMMABLE SOLID. A solid, other than a blasting agent or explosive, that is capable of causing fire through friction, absorption or moisture, spontaneous chemical change, or retained heat from manufacturing or processing, or which has an ignition temperature below 212°F (100°C) or which burns so vigorously and persistently when ignited as to create a serious hazard. A chemical shall be considered a flammable solid as determined in accordance with the test method of CPSC 16 CFR; Part 1500.44, if it ignites and burns with a self-sustained flame at a rate greater than 0.1 inch (2.5 mm) per second along its major axis.

 

[Ryan Schultz]

Intuitively it seems they are not, since big box stores like Menards and Home Depot, with stacks of EPS ans XPS, would have to be categorized as a H-3, if so.

 

[tmurray]

Ignition point of XPS is 365°C, so I don't think it meets the definition.

 

[TheCommish]

Request the data sheet on the specific product(s), look at ignition temperature flame spread and smoke development compare to the 212 degre and

or which burns so vigorously and persistently when ignited as to create a serious hazard. A chemical shall be considered a flammable solid as determined in accordance with the test method of CPSC 16 CFR; Part 1500.44, if it ignites and burns with a self-sustained flame at a rate greater than 0.1 inch (2.5 mm) per second along its major axis.