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Structural Design for the Stage by Bradley L Powers, Steven A Schmidt, Ben Sammler, Alys Holden

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10

Combined Loading for Steel Members

INTRODUCTION

As discussed in Chapter 7, beams and columns may be subject to combined loading conditions. A given loading condition may cause bending, compression, or tension or any combination of the three. In these cases, the AISC recommends various interaction equations which are based on exactly the same precepts as the equations recommended by the NDS for sawn lumber members; the sum of the ratios of actual to allowable stress for each type of stress must be less than or equal to 1.0 to insure that the total capacity of the beam is not exceeded:

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For the sake of simplicity, we will not discuss every possible ...

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