10.113 It is a common practice to use composite beams with formed steel deck as the floor system in steel frame structures. Park, Kim, and Yang (Journal of Structural Engineering, 2003) performed a series of tests on composite beams with web opening. The applied loads at the first yield and at the first occurrence of transverse cracks are given in table below. Is the mean load at the first yield significantly higher than the mean yield at the appearance of the first traverse crack?

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First Yield Transverse 45.2 37.0 65.1 27.9 56.2 36.7 52.1 32.7 47.1 35.3 58.8 47.0 49.0 49.0