Posted By John Packer when I imagine anything going around a conveyor belt system in a plastic box I automatically think of open topped plastic tote bins. Is this the case in this instance? Is this being driven by a need to protect the books and documents? Otherwise, IMHO the fire loading of the paper based materials is likely to make the plastic box pretty immaterial.

Posted By Ron Hunter I would suggest that the containers aren't the issue here, rather the potential breach of compartments by the conveyor system. What does your FRA say on this?

Posted By D. Hilton Should specify totes as TP(b)having a rate of burning that does not exceed 50 mm/ minute as per BS EN ISO 306:2004. Typically, these containers are manufactured from thermoplastic such as polypropylene piloted ignition of 345 deg C (ignition temp 360 deg C). Critical Heat flux circa 20 kW/m^2. Heat release rate from molten pool circa 25 kW/m^2. Calculated heat release rate from a box side 1m x 0.3 metre circa 76 kW with a soot yield of 0.08 g/g fuel. Smoke release rate (M dot Smoke) calculated as: Mass burn rate X soot yield Mass burn rate = HRR * Heat of Combustion Efficiency Mass burn rate = 76 kW / 43.3 kJ/g * 0.89 = 1.97 Smoke release rate = 1.97 * 0.08 = 0.16 g per box side.