I am helping a friend to design a concert hall. No need for super architectural show off. Just a rectangular box. Knowing that in my country constructions are done with reinforced concrete and concrete blocks and that the hall's dimensions are, length: 75 meters, width: 32m height: 9m, and that there should not be any columns inside, what would be the size of the columns, beams and roof slab ?

1377

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616

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765

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528

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595

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although ckt breakers have taken the place of old fuse. But instead of it , these older ones are still used in the industries and homes ? why .... what are their advantages and disadvantages ? which one is leading and winning the race and competition ?

1620

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773

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458

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256

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572

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89

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500

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Suppose Idoc is struced in the Q then how can I resend it?

1667

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189

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What is icu and ics in Acb and how many time icu or ics passes from breaker?

1160

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