Smoke-developed index (abbreviated SDI) is a measure of the concentration of smoke a material emits as it burns.[1] Like the Flame Spread Index, it is based on an arbitrary scale in which asbestos-cement board has a value of 0, and red oak wood has 100. The SDI is measured using a horizontal test specimen, according to the Steiner tunnel test protocol.
The ASTM standard E84 defines a standard test method for surface flame spread and smoke density measurements.[2] A smoke-developed index of less than 450 is required by IBC section 803.1 at interior walls and ceilings for all surface materials except trim.
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- ^ "Archived copy" (PDF). Archived from the original (PDF) on 2007-09-23. Retrieved 2008-11-16.
{{cite web}}: CS1 maint: archived copy as title (link) - ^ "Standard Test Method for Surface Burning Characteristics of Building Materials".