UL 1709:2017-02 Rapid Rise Fire Tests of Protection Materials for Structural Steel.
1.1 UL 1709 describes a test method for measuring the resistance of protective materials to rapid-temperature-rise fires.
1.2 The test method covers a full-scale fire exposure, intended to evaluate the thermal resistance of protective material applied to structural members and the ability of the protective material to withstand the fire exposure.
1.3 The standard describes the minimum testing requirements for classification, the limits of applicability of test results and acceptable methodology to determine the classification achieved.
1.4 The test method includes a supplementary test method for beams, intended to evaluate the ability of protective materials to perform when subject to significant deflections, for use in conjunction with the full-scale exposure test and applicable for beams and other sections subject to bending. Information published in accordance with this test method may also include product design tables for beams and sections subject to bending derived from the supplementary test method and accompanying methodology.
1.5 Information published in accordance with this test method may also include supplementary product design tables for alternate limiting temperatures derived from a multi-temperature analysis. Such tables are provided to aide in conditions where a performance-based-design approach is implemented, but are not part of the classification.
2.1 Units of measurement
2.1.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information.
2.2 Undated references
2.2.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard.
2.4.1 Configuration of section: The type of section, defined by reference to its shape and structural use.
For example: open column, open beam, hollow column, hollow beam.
2.4.2 Hollow section: A tube or pipe or similar shape that has a cross section containing enclosed space.
2.4.3 Open section: A wide flange similar shape section that has a cross-section containing no enclosed space.
FULL-SCALE TEST METHOD
3 Furnace Control
3.1 The fire environment within the furnace is to develop a total heat flux of 65,000 ±5000 Btu/h•ft2 (204 ±16 kW/m2) and an average temperature of 2000 ±100°F (1093 ±56°C) within 5 mm from the start of the test. The fire environment is to be controlled by reproducing the furnace temperatures recorded during the furnace calibration method specified in Furnace Calibration, Section 4. This temperature is to be maintained throughout the remainder of the fire test as shown in Figure 3.1.UL 1709 pdf download.