Questions and discussion for this lecture live here. Fire away by hitting Reply below 
I’m a bit confused by the logic of having an upward-pointing reaction at A to satisfy EQU state. If we are concerned with designing against uplift at A, shouldn’t we want the reaction to point downwards?
Hi @Jomo_Ndirangu - If the reaction pointed downwards, this would mean that the structure is trying to lift off its foundation at A (i.e. uplift). The fact that the reaction at A evaluates to a positive (upward) pointing reaction force means that the structure is imposing a vertical downward force at A and as such, there is no uplift at A, satisfying the EQU limit state.
Seán
Hi Sean. Many thanks for the earlier clarification. Please walk me through your reasoning to select the most onerous load pattern in both EQU and STR states. Also kindly point me to somewhere I can research further on load patterns / combinations. Thanks.