The applicant union sought certification for a single bargaining unit comprising employees at three of the respondent's plants.
The respondent argued that three separate single-plant units were appropriate.
Applying the Usarco criteria, the Board considered the community of interest, centralization of managerial authority, economic factors, and source of work.
The Board found that the lack of employee interchange, the identical nature of the work, and the considerable autonomy of the individual plant managers tilted the balance in favour of three separate units.
The application was dismissed with respect to one unit due to insufficient membership support, and the ballots for the other two units were ordered to be counted.