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Composite castellated beam design is done in two steps: Construction stage design and composite design. The following conditions are checked in each design step.
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Construction Stage Design
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The effects of the T section on the castellated beam spaces are found with the equilibrium equation. Internal force diagrams are used in the static analysis while calculating these forces. The equation of equilibrium calculates the bending moment and axial force on the T section. Then, the combined effects are considered by calculating the T-section bending and axial force strengths.
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Mathinline body --uriencoded--$$ \normalsize \mathrm%7BWhen%7D \;\; \dfrac%7BP_r%7D%7BP_c%7D \ge 0.2 \;\;\;\;\;\;\;\;\;\;\; \dfrac%7BP_r%7D%7BP_c%7D + \dfrac%7B8%7D%7B9%7D \bigg(\dfrac%7BM_%7Brx%7D%7D%7BM_%7Bcx%7D%7D+\dfrac%7BM_%7Bry%7D%7D%7BM_%7Bcx%7D%7D \bigg) \le1.0 \;\;\;\;\;\;\;\;\;\;\;\;\;\; \;\;\;\;\;\;\;\;\;\;\;\;\;\; (H1-1a) $$ Mathinline body --uriencoded--$$ \normalsize \mathrm%7BWhen%7D \;\; \dfrac%7BP_r%7D%7BP_c%7D \ge 0.2 \;\;\;\;\;\;\;\;\;\;\; \dfrac%7BP_r%7D%7B2P_c%7D + \bigg(\dfrac%7BM_%7Brx%7D%7D%7BM_%7Bcx%7D%7D+\dfrac%7BM_%7Bry%7D%7D%7BM_%7Bcx%7D%7D \bigg) \le1.0 \;\;\;\;\;\;\;\;\;\;\;\;\;\; \;\;\;\;\;\;\;\;\;\;\;\;\;\; (H1-1b) $$
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