Problem A Grade 300, simply supported composite steel beam, 360UB56.7 and 8m long, in an aged care building classified as Class 9c building of Type A Construction is required to design for fire resistance of FRL = 120 minutes. The beam is supporting a dead load of 8 kN/m and a live load of 16 kN/m. The beam is free to expand at high temperature. The floor slab is solid (that is, there is no void between the I-beam and the steel profiled sheet underneath the concrete slab). (a) Find a minimum thickness for the steel beam if Roberts VP30 insulation is used as the fire protection material. (b) If no insulation is to be used, determine the time for the beam to fail under standard fire. MATERIAL NAME: Roberts VP30 MATERIAL TYPE: Sprayed insulation material COMPOSITION: Vermiculite and cement MEAN DENSITY: 450 kg/m2 TEST DATA APPLICABILITY 3 - Sided 4 - Sided Beam Strut or Tension Member Beam Strut or Tension Member Solid Slab Open Slab Thickness Range for Stickability (mm) 13-52 13-52 13-52 20-62 20-81 B A B B B Regression REGRESSION DATA Regression Exposure: as as . alo . az az -1.56272 154421 A 3-Sided - 15.027 1.44069 -7.83131 .951941E-01 -889093E-03 44069 4-Sided 1.79303 .51318E-02 B -29.9952 -3.17425 -.08908 - 282513E-03 1.98754 MATERIAL NAME: Monokote COMPOSITION: Vermiculite and plaster MATERIAL TYPE: Sprayed insulation material MEAN DENSITY: 360 kg/m3 TEST DATA APPLICABILITY 3 - Sided 4 - Sided Beam Strut or Tension Member Beam Strut or Tension Member Solid Slab Open Slab Thickness Range for Stickability (mm) 11-63 11-63 1-63 11-63 13-66 13-66 Regression A B B B B REGRESSION DATA Regression Exposure: a. a az a a a. as 3-Sided -25.412 2.09197 -10.8244 4.4598E-02 1.79187E-03 7.03604E-02 440241 B 4-Sided -32.3244 2.1059 -3.56755 -2.56146E-02 2.40819E-03 3.35003E-02 1.42001 Problem A Grade 300, simply supported composite steel beam, 360UB56.7 and 8m long, in an aged care building classified as Class 9c building of Type A Construction is required to design for fire resistance of FRL = 120 minutes. The beam is supporting a dead load of 8 kN/m and a live load of 16 kN/m. The beam is free to expand at high temperature. The floor slab is solid (that is, there is no void between the I-beam and the steel profiled sheet underneath the concrete slab). (a) Find a minimum thickness for the steel beam if Roberts VP30 insulation is used as the fire protection material. (b) If no insulation is to be used, determine the time for the beam to fail under standard fire. MATERIAL NAME: Roberts VP30 MATERIAL TYPE: Sprayed insulation material COMPOSITION: Vermiculite and cement MEAN DENSITY: 450 kg/m2 TEST DATA APPLICABILITY 3 - Sided 4 - Sided Beam Strut or Tension Member Beam Strut or Tension Member Solid Slab Open Slab Thickness Range for Stickability (mm) 13-52 13-52 13-52 20-62 20-81 B A B B B Regression REGRESSION DATA Regression Exposure: as as . alo . az az -1.56272 154421 A 3-Sided - 15.027 1.44069 -7.83131 .951941E-01 -889093E-03 44069 4-Sided 1.79303 .51318E-02 B -29.9952 -3.17425 -.08908 - 282513E-03 1.98754 MATERIAL NAME: Monokote COMPOSITION: Vermiculite and plaster MATERIAL TYPE: Sprayed insulation material MEAN DENSITY: 360 kg/m3 TEST DATA APPLICABILITY 3 - Sided 4 - Sided Beam Strut or Tension Member Beam Strut or Tension Member Solid Slab Open Slab Thickness Range for Stickability (mm) 11-63 11-63 1-63 11-63 13-66 13-66 Regression A B B B B REGRESSION DATA Regression Exposure: a. a az a a a. as 3-Sided -25.412 2.09197 -10.8244 4.4598E-02 1.79187E-03 7.03604E-02 440241 B 4-Sided -32.3244 2.1059 -3.56755 -2.56146E-02 2.40819E-03 3.35003E-02 1.42001
