How Family–Work Conflict Shapes Construction Workers’ Safety Behavior: The Roles of Fatigue and Supervisor Support

Psychosocial stressors are increasingly recognized as critical determinants of workplace safety, yet their mechanisms in construction settings remain poorly understood. This study examines how family–work conflict (FWC) is associated with safety behavior among construction workers, with mental and physical fatigue as parallel mediators and perceived supervisor support (PSS) as a moderator. Drawing on Conservation of Resources (COR) theory, cross-sectional data were gathered from 527 construction workers across three regions of Jordan and analyzed using Hayes’ PROCESS macro. The findings indicate that FWC is negatively associated with safety behavior both directly and through its positive associations with elevated fatigue levels. Supervisor support was found to attenuate the FWC-to-physical-fatigue pathway and buffer safety behavior under high-conflict conditions. These associations should be interpreted as statistical patterns consistent with the proposed theoretical model rather than evidence of causal relationships, given the cross-sectional design. Theoretically, the study extends COR theory into occupational safety by distinguishing two fatigue dimensions and demonstrating a boundary condition for resource loss. Practically, the findings support supervisor-led safety programs and organizational fatigue management as complementary strategies for addressing psychosocial risk factors in high-risk construction environments.