UL 1709-2017 pdf download

UL 1709-2017 pdf download.Rapid Rise Fire Tests of Protection Materials for Structural Steel.
5.3 The temperature of the open section is to be measured by no fewer than five thermocouples located at each of tour levels (minimum o120 thermocouples). The upper and lower levels are to be 2 ft (610 mm) from the ends of the steel column, and the other two intermediate levels are to be equally spaced between the upper and lower levels. The thermocouples at each level are to be placed to measure significant temperatures of the component elements of the steel column. Figure 5.1 shows required locations of thermocouples on wide flange and tubular steel columns.
5.4 The temperature of the hollow sechon Is to be measured by no fewer than four thermocouples located at each of four levels (minimum of 16 thermocouples), The upper and lower levels are to be 2 ft (610 mm) from the ends of the steel column, and the other two intermediate levels are to be equally spaced between the upper and lower levels. The thermocouples at each level are to be placed to measure significant temperatures of the component elements of the steel column. Figure 5.1 shows required locations of thermocouples on tubular steel columns.
5.5 All thermocouples for the purpose of recording specimen temperature are to be fabricated from minimum 0032 in (0.8 mm) diameter (No, 20 B & S gauge) chromel-alumnel, inconel sheathed wires or equivalent having a time constant of 2 s or less.
5.6 The applied protection material is to be restrained against longitudinal thermal expansion greater than that of the steel column by attaching ngid steel plates or reinforced concrete to the ends of the steel column prior to application of the protection material. The plates or concrete are to be sized to provide direct bearing over the entire transverse area of the pi-o(ection material.
5.7 The ends of the test specimen, including the means for restraint, are to have sufficient thermal insulation to prevent significant direct heat transfer through to the ends of the steel section from the furnace.
5.8 Prior to test, the test specimen is to be conditioned such that the dampest portion of the test specimen has achieved a moisture content corresponding to drying to equilibrium with air in the range of 50 to 75% relative humidity at 73 ±5°F (22.8 ±2.8°C). If the protection product requires a different moisture content to perform as intended, such moisture content may be allowed provided the moisture content and justification of acceptance are documented in the report, and the moisture content is included in the classification.
5.9 Moisture content equilibrium with air shall be determined to have been reached when successive weekly weighings of a representative specimen, prepared at the same time as the test specimen, indicate that the representative specimen has slopped losing weight.
6 Performance Criteria
6.1 The transmission of heat through the protection material during the period of tire exposure for which classification is desired shall not raise the average temperature at any of the four levels of the steel column, above 1 OOOF (538CC) and no thermocouple shall indicate a temperature greater than 1 200F (649’C).
7 EnvIronmental Performance
7.1 Products evaluated for fire endurance under the requirements of this Standard shall also comply with the applicable performance requirements in UL 2431 for Material Classification Category I-A: Outdoor, Heavy Industrial.
8 ApplicabIlity of Results and Classification
8.1 An individual classification of a column or beam may be obtained by the tests described within this document and based upon the performance criteria specified in Performance Criteria, Section 6. The fire endurance classification is applicable to the column or beam when used in a type of construction representative of the design that the test is intended to examine.
8.2 Classification is applicable only to the configuration (either open sections such as wide flange columns or hollow sections such as tubes and pipes) of the steel tested.
8.3 Supplementary product design tables for the same configuration of steel tested as a column can be generated for beams by following the procedure in Appendix B. on the basis of the supplementary test procecjre in Supplementary Test Method for Beams. Section 9.
8.4 Classification of multiple steel column sections, covering a range of WIt) or A/P values, and durations may be accomplished by following the procedures outlined in Appendix Al. A2, and A3.
8.5 Classification is applicable to steel columns exposed on 4 sides, or less than all four sides. When the steel column is exposed on less than all four sides, the sides that are not exposed (and that cannot be coated by tire protection material) must be in direct contact with material of substantial heat sink such as concrete.