此单元组包括板材,铁工,焊接,锅炉制造行业承建商,其拥有和经营自己的企业。本组还包括主管,其负责监督和协调以下单元组人员的活动:机械师和机械加工和模具督察[7231](7231),工具和模具制造商[7232](7232),钣金工人[7233](7233),锅炉工[7234](7234),金属结构和板金加工钣金和装配工[7235](7235),联合冲剪工[7236](7236),焊接工和相关机械操作员[7237](7237)和加工工具经营者[9417](9417)。他们受雇于结构,板金加工和相关金属制品的制造,生产,安装企业和机加工车间。
This unit group includes sheet metal, ironwork, welding and boilermaking trade contractors who own and operate their own businesses. This group also includes supervisors who supervise and co-ordinate the activities of workers classified in the following unit groups: Machinists and Machining and Tooling Inspectors [7231](7231), Tool and Die Makers [7232](7232), Sheet Metal Workers [7233](7233), Boilermakers [7234](7234), Structural Metal and Platework Fabricators and Fitters [7235](7235), Ironworkers [7236](7236), Welders and Related Machine Operators [7237](7237) and Machining Tool Operators [9417](9417). They are employed by structural, platework and related metal products fabrication, manufacturing and erecting companies and machine shops.