3003 W CASINO RD BLDG 45-11 2018-09-20

AIRCRAFT LOADING WALKWAYS 415-9 Table 6.4.2 Typical Furnace Time–Temperature Gradients 1000 for Fire Testing of Aircraft Loading Walkways 1800 I External floor exposure Exposed Floor Exposed Wall I temperature 900 p Section Section 1600 I Temperatures Temperatures 800 Time (min:sec) °C °F °C °F 1400 I 700 0:00 20 68 20 68 External wall exposure 0:20 160 320 90 194 1200 i temperature ci 0:40 300 572 165 329 o 600 1:00 440 824 235 455 1:20 580 1076 310 590 m 1000 I m 1:40 720 1328 380 716 EE i 500 E 2:00 860 1580 450 842 aoo I E 2:20 915 1679 520 968 400 2:40 940 1724 595 1103 I 3:00 955 1751 635 1175 3:20 960 1760 660 1220 600 300 3:40 965 1769 675 1247 4:00 970 1778 685 1265 400 200 4:20 970 1778 690 1274 4:40 975 1787 690 1274 5:00 975 1787 690 1274 zoo I 100 5:20 975 1787 695 1283 5:40 980 1796 695 1283 i 6:00 980 1796 695 1283 0 6:20 985 1805 700 1292 0 1 2 3 4 5 6 7 8 9 10 6:40 985 1805 700 1292 Time(minutes) 7:00 990 1814 700 1292 FIGURE 6.4.2 Typical Furnace Tune–Temperature Curves 7:20 990 1814 705 1301 for Fire Testing of Aircraft Loading Walkways. (See Table 7:40 995 1823 705 1301 8:00 995 1823 705 1301 6.4.2.) 8:20 995 1823 710 1310 8:40 1000 1832 710 1310 6.4.4 Temperatures of Unexposed Surfaces of Floors and 9:00 1000 1832 710 1310 Wim• 9:20 1005 1841 715 1319 6.4.4.1 Temperatures of unexposed surfaces shall be mea- 9:40 1005 1841 715 1319 sured with exposed-type thermocouples placed under felted 10:00 1005 1841 715 1319 refractory fiber pads. Note:See also Figure 6.4.2. 6.4.4.1.1 The refractory fiber pads shall be of flexible,felted material, free of organic additives,and they shall exhibit the following properties: 6.4.4.1.2 The thickness measurement shall be made under (1) Length and width shall he 6 in.±1/s in.(152 mm±3.18 mm). the light load of a 1/2 in. (13 mm) diameter pad of a dial mi- (2) Thickness shall be 0.375 in.±0.063 in. (9.5 mm±1.6 mm). crometer gauge. (3) Dry weight shall be 0.147 lb±0.053 lb(67 g±24 g). 6.4.4.1.3 The wire leads of the thermocouple shall have an (4) Thermal conductivity [at 150°F (66°2)] shall be 0.37 Btu immersion under the pad and shall be in contact with the in./hr ft •°F ± 0.03 Btu in./hr ft •°F (0.053 W/m•C unexposed surface for not less than 11/2 in. (38 mm). The ±0.004 W/m•C). hot junction of the thermocouple shall be placed approxi- (5) Hardness indentation on soft face shall be 0.075 in. mately under the center of the pad. The outside diameter ±0.025 in. (1.9 mm±0.6 mm).Indentation shall be deter- of protecting or insulating tubes shall be not more than mined in accordance with ASTM Test Method C569,Stan- 5/16 in. (8 mm). The pad shall be held firmly against the dard Test Method for Indentation Hardness of Preformed Ther- surface and shall fit closely about the thermocouples. The mal Insulations. Modified Brinell values of hardness are wires from the thermocouple in the length covered by the obtained by the following relationship,where y=the mea- pad shall be not heavier than No. 18 B &S gauge 0.04 in. sured indentation in inches: (1.02 mm) and shall be electrically insulated with beat- Hardness resistant and moisture-resistant coatings. Hardness=— 6.4.4.2 Temperature readings shall be taken at not less than y nine points on the surface.Five of these shall be symmetrically (6) The pads shall be shaped by wetting,forming,and drying located: one to be approximately at the center of the walkway to constant weight to provide complete contact on sharply specimen and four to be approximately at the center of its quar- contoured surfaces. ter sections.The other four shall be located at the discretion of 2008 Edition