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Fire-resistant performance of a laminated veneer lumber joint with metal plate connectors protected with graphite phenolic sphere sheeting |
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| Authors: | Bambang Subyakto Toshimitsu Hata Isamu Ide Shuichi Kawai |
| Institution: | (1) R&D Center for Applied Physics, LIPI, Puspiptek Serpong, 15310 Tangerang, Indonesia;(2) Wood Research Institute, Kyoto University, Uji, 611-0011 Kyoto, Japan;(3) Lignyte Ltd., Sakai, 592 Osaka, Japan;(4) Wood Research Institute, Kyoto University, Uji, 611-0011 Kyoto, Japan |
| Abstract: | Creep under fire of laminated veneer lumber (LVL) joined with metal connectors was studied. The fire-resistant performance of LVL butt joints connected with metal plates protected with graphite phenolic sphere (GPS) sheeting was discussed. The GPS sheeting was overlaid on the joint in different sizes and locations. The joint was exposed to a burner with a top flame temperature of 800°C and loaded with a load of 200 N to test for creep under fire. The results showed that the fire-resistant performance of the joint was markedly improved by the sheeting. The size and location of the GPS sheet significantly affected the time to rupture of the specimen, which was six times longer than that without GPS. Temperature measurements at the joint showed that the GPS sheeting distributed the heat along the surface and delayed failure. Thermographic images and analyses clarified the improvement in fire-resistant properties due to GPS. |
| Keywords: | Laminated veneer lumber Joint Graphite phenolic spheres Metal plate connectors Creep test Fire-retardant performance |
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