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h2. DoesIn addition to gravity load, should initial P-Delta analysis should contain notional loadsload?
in addition to the gravity loads?\\


*Answer:* To fully account for P-Δ and P-δ one needs to run, each design [load combination|kb:Load combination] must be individuallyrun as a nonlinear P-Delta analysis. Thesewhich loadincludes combinationsnotional shouldload.
include
theTo notionalfully loads.account However, the larger for P-Δ effect is fully accounted for in buildings with either rigid or semi-rigid diaphragms by first using the gravity loads to do , an initial P-Delta analysis should be andperformed thenwith dogravity analysisload, forthen otheradditional loads asshould linearbe aboutapplied itlinearly. ThisJustification is that becausetotal theaxial totalload (P) at each story level does not change due to any lateral loads including any notional loads. This procedure is automatically implemented in ETABS where a constant P\- Δ analysis is used to perform subsequent linear, modal and response spectrum analysis.

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h2. In addition to gravity load, should remains constant regardless of lateral and notional load. For subsequent linear, [modal|kb:Modal analysis], and [response-spectrum|kb:Response-spectrum analysis] analyses, [ETABS|etabs:Home] automatically implements this procedure when running constant P-Δ analysis.


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*For the underlined portion, shown below, consistency between the original and edited versions may need verification.*

h2. Does initial P-Delta analysis should contain notional load?

*Answer:* loads in addition to the gravity loads?\\

To fully account for P-Δ and P-δ, one needs to run each design [load combination|kb:Load combination] mustindividually be run as a nonlinear P-Delta analysis which includes. These load combinations should include the notional loadloads. However, the 
Tolarger P-Δ effect is fully accountaccounted for P-Δ in buildings with either rigid or semi-rigid diaphragms, by first using the gravity loads to do an initial P-Delta analysis should+and bethen performeddo withanalysis gravity load, then additionalfor other loads shouldas belinear appliedabout linearlyit+. JustificationThis is because thatthe total axial load (P) at each story level does not remainschange constantdue regardlessto ofany lateral loads including andany notional load. For subsequent linear, [modal|kb:Modal analysis], and [response-spectrum|kb:Response-spectrum analysis] analyses, [ETABS|etabs:Home] automatically implements this procedure when running constant P-Δloads. This procedure is automatically implemented in ETABS where a constant P\- Δ analysis is used to perform subsequent linear, modal and response spectrum analysis.

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