CTB 133
Our furniture takes
the heat
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In 1991, the California Bureau of Home Furnishings and Thermal Insulation
issued California Technical Bulletin 133: Flammability Test Procedure for Seating
Furniture for Use in Public Occupancies (CTB 133). The most rigorous
upholstered furniture flammability test in the world, CTB 133 is the
foundation for open-flame furniture testing requirements in most states, and
is the basis for international testing standard ASTM E-1537.
The bulletin describes specific guidelines for burn testing facilities and
procedures. Furniture is ignited in a specifically designed room and
numerous measurements are taken. The furniture fails the test if:
- the temperature increases more than 50°F at 4 feet off the floor or 200°F
at the ceiling (10 feet).
- smoke opacity reaches greater than 75% 4 feet off the floor
- the carbon monoxide concentration exceeds 1000 parts per million for more
than 5 minutes
- the furniture loses more than three pounds of weight due to combustion
within the first 10 minutes of the test
At Nemschoff, we were the first in our industry to build a CTB 133-compliant
test facility, and every product we sell has since been tested. Not only
have we made sure that each of our products can meet CTB 133, we continue to set new standards by working closely
with government and independent testing agencies to further improve test
methodologies.
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