The effect of combined vertical (V), moment (M), and horizontal (H) loading generated by wind, earth pressure, earthquake, and gravity loading is not realized in conventional foundation design. Despite the advantages of VMH failure envelopes, there is a lack of consideration of the serviceability, resulting in a new prospect recognized as design envelopes. It involves triple displacement metrics of vertical displacement ( \(\delta\) ), rotation angle ( \(\theta\) ), and horizontal displacement ( \(\eta\) ). The present research delves into the effect of combined load interaction on the behavior of rafts in loose and medium mixed deposits. The performance of the raft foundation under combined loading is evaluated using a 3D finite element analysis. Failure and design envelopes for the validated raft system are developed considering combined loading associated with dominant system parameters comprising the raft breadth, embedment depth, and subsoil strength. Eventually, a dataset of ten case studies comprising various geomaterials and foundation types and documented settlement and tilt values is applied to conform to the proposed prospect. Three efficacy scenarios are defined based on minor, major, and severe damage levels. Design and failure surface boundaries distinguish the efficacies. Realizing serviceability and failure aspects in a coupled form leads to a more reliable foundation design.
