ide-flange WF 24 x 76 steel beam with 1 in. (25.4 mm) of spray-applied cementitious material (British equivalent 610 x 229 x 113 kg/m). The beam has WID 1.03 lb/ft and nowhere does the temperature exceed 1,000 F (538 C) or 811 K. The insulation temperature is to he 750 F while keeping the steel temperature at 538 C. The results obtained from

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)
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Chapter7: Length And Length-related Variables In Engineering
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A wide-flange WF 24 x 76 steel beam with 1 in. (25.4 mm) of spray-applied cementitious material (British equivalent

610 x 229 x 113 kg/m). The beam has WID 1.03 lb/ft and nowhere does the temperature exceed 1,000 F (538 C) or 811 K. The insulation temperature is to he

750 F while keeping the steel temperature at 538 C. The results obtained from

(a) Malhotra's quasi-steady state approach

(b) Jeanes' graph

(c) Lie's graph

are compared. To calculate the fire resistance R for the spray-applied beam, the

following data are used:

K (Btu/ft.h-°F)
Cp (Btu/lb-°F)
y (density/ft³)
Steel
25.6
0.133
480
Insulation
0.067
0.305
14.9
Transcribed Image Text:K (Btu/ft.h-°F) Cp (Btu/lb-°F) y (density/ft³) Steel 25.6 0.133 480 Insulation 0.067 0.305 14.9
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