The Building #4 addition was constructed to expand the fabrication facilities for L.B. Smith, Inc. The building houses a new 75' paint spray booth used to paint large assembly pieces. The building addition was constructed over top of an existing building which houses a smaller paint spray room that remains as an alternate paint spraying building. In order to allow material handling capabilities, crane rails from the existing building where extended into the new building. Alignment of the extended crane rails was extremely critical.