3. A floor system is supported by beams with a span L = 6 m, section bw = 40 cm, monolithically cast in a 6.5 cm thick s

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3. A floor system is supported by beams with a span L = 6 m,section bw = 40 cm, monolithically cast in a 6.5 cm thick slab. Thecenter-to-center spacing between beams is 5 m. In the positivemoment zone, they are provided with 18 bars of 1 " arranged inthree layers of 6 with d = 61 cm. The resistances of the materialsare f'c = 307 kg / cm² and fy = 4200 kg / cm². Find the momentresistant of the wings ( T - m , without decimals ).
Answer: 102 T-m
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