Bolts in tension (5 cases):
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1. |
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Check with leff patterns according to the table 5.3 (see Effective lengths for base plate T-stubs) |
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2. |
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Check with leff patterns like for column beam for inner bolts no failure mode with prying force Mode 3 |
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3. |
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Check with leff patterns like for column beam, with all cases from the table 5.3. Make an additional check with leff: 
From: Wald F., Bouguin V., Sokol Z., Muzeau J.-P. EFFECTIVE LENGTH OF T-STUB OF RHS COLUMN BASE PLATES. Czech Technical University of Prague, University of Blaise Pascal, Clermont Ferrand |
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4. |
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Check with leff patterns according to all cases from the table 5.3 also for an additional inner row. |
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5. |
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Check with leff patterns like for column beam, but without prying force. And check this case: 
From: Wald F., Bouguin V., Sokol Z., Muzeau J.-P. EFFECTIVE LENGTH OF T-STUB OF RHS COLUMN BASE PLATES. Czech Technical University of Prague, University of Blaise Pascal, Clermont Ferrand |