Results: The study identified several ergonomic exposures in interior systems construction. Several risk
factors were especially prevalent in the drywall panel installation task: awkward body postures such as
overhead arm posture, trunk flexion, and handling of heavy drywall panels. Some tasks were observed to
have combinations of these musculoskeletal risk factors, such as drywall panel installation, where the
workers lifted heavy drywall panels in awkward body postures. In addition, a safety hazard frequently
resulted when a worker’s foot was poorly supported on a ladder while lifting heavy drywall panels to
hang them on the ceiling or upper wall.