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For the load combination of 0.9D + or - 1W, why do we take the negative as the critical value for design , even though there are higher positive values? - CivilEngineeringBible.com Q&A

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For the load combination of 0.9D + or - 1W, why do we take the negative as the critical value for design , even though there are higher positive values?

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asked May 21, 2018 in Structural Eng. by anonymous
For the load combination of 0.9D + or - 1W, why do we take the negative as the critical value for design , even though there are higher positive values?

For example in etabs, for combination 3 the Pu= 6000 and in the upper combination Pu= 3000 but ETABS chose the 0.9D - 1W as the design combination.

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1 Answer

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answered Jul 11, 2018 by BrianHarris (180 points)
Thank you so much for this submit

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