Smoke-developed index (abbreviated SDI) is a measure of the concentration of
smoke
Smoke is an aerosol (a suspension of airborne particulates and gases) emitted when a material undergoes combustion or pyrolysis, together with the quantity of air that is entrained or otherwise mixed into the mass. It is commonly an unwante ...
a material emits as it burns. 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
''Quercus'' subgenus ''Quercus'' is one of the two subgenera into which the genus ''Quercus'' was divided in a 2017 classification (the other being subgenus ''Cerris''). It contains about 190 species divided among five sections. It may be calle ...
wood has 100. The SDI is measured using a horizontal test specimen, according to the
Steiner tunnel test protocol.
The
ASTM
ASTM International, formerly known as American Society for Testing and Materials, is a standards organization that develops and publishes voluntary consensus technical international standards for a wide range of materials, products, systems and s ...
standard E84 defines a standard test method for surface flame spread and smoke density measurements.
A smoke-developed index of less than 450 is required by
IBC IBC is an initialism that can stand for:
Broadcasting
*Intercontinental Broadcasting Corporation, Channel 13, Philippines
*International Beacon Project, Worldwide network of radio propagation beacons
*International Broadcast Centre
*International ...
section 803.1 at interior walls and ceilings for all surface materials except trim.
See also
*
Steiner tunnel test
*
Limiting oxygen index The limiting oxygen index (LOI) is the minimum concentration of oxygen, expressed as a percentage, that will support combustion of a polymer. It is measured by passing a mixture of oxygen and nitrogen over a burning specimen, and reducing the oxygen ...
References
{{reflist
Fire test standards