NATIONAL LABOR RELATIONS BOARD

176 THIRD ANNTJAL REPORT OF NATIONAL LABOR RELATIONS BOARD
fact that the type of work done by two groups of employees is dissimilar
militates against their inclusion in one unit. 55 However, a
difference in the nature of the work done by employees does not necessarily
preclude a single appropriate unit.57
In some cases, the Board has limited the appropriate unit to those
employees who are engaged in the central operations of a company,
thereby excluding employees in collateral and adjunct departments.
Most commonly, this takes the form of limiting the appropriate unit
to the company's production employees, but it may also take other
forms. In Matter of John Minder & Son, Ine., 58 the union involved
argued for a unit limited to employees engaged in the manufacture
of meat products, thereby excluding shippers, truck drivers, and
clerical employees. The Board supported this contention, saying :
The record is clear that the employees in the unit advocated by the Union,
being primarily engaged in the manufacture of meat products, are differentiated
in skill and experience from the balance of the respondent's employees who are
primarily engaged in tasks unrelated to the manufacturing process, and who
are, therefore, not eligible for membership in the Union.'
Mutual interest among various groups of employees appears readily
where there is a substantial amount of interchangeability among the
members of those groups. In Matter of Todd Shipyards Corporation,
et a1, 6° the Board, in holding that employees in the respondent's
three ship repair yards constituted a single unit, said :
* * * The record discloses that many of the employees engaged in the
ship repairing industry in and about the port of New York shift constantly from
one yard to another.. This holds true for workmen employed by the respondents.
The Industrial Union's membership cards show that many former Robins'
employees are now employed in the Tietjen yard and vice versa. The men do
not work steadily in either of the plants where the "shape up" is in practice.
The "shape up" is a method by which employees of the respondents are hired
on a day-to-day basis. They must assemble in the "shape up" line at the yard
gate every day and are selected by one or more representatives of the respondents,
called "shapers," to work on that particular day."
pany and Steel and Wire Workers Protective Association, 5 N. L. R. B. 871; and Matter of
C. A. Lund Company and Novelty Workers Union, Local 1866 (A. F. of L.) successor,
6 N. L. R. B. 423.
6• Matter of Hoffman Beverage Company and Joint Local Executive Board of International
Union of United Brewery, Flour, Cereal, and Soft Drink Workers of America.
3 N. L. R. B. 584 •, Matter of Ohio Foundry Company and international Molders' Union
of North America, Local No. 218, et al., 3 N. L. R. B. 701 ; Matter of Biles-Coleman Lumber
Company, and Puget Sound District Council of Lumber and Sawmill Workers, 4 N. L. R. B.
679; Matter of Hopwood Retinning Company, Inc., et al., and Metal Polishers, Buffers.
Platers and Helpers International Union, Local No. 8. et al., 4 N. L. R. B. 922; Matter of
Pennsylvania Greyhound Lines, Inc., and Transport Workers Union of America, Local No
155, 6 N. L. R. B. 314; Matter of Waggoner Refining Company, Inc., et al., and Int,rnational
Association of Oil Field, Gas Well and Refinery 'Workers of America, 6 N. L. R. B. 731
Matter of Boorum and Pease Company and United Paper Workers Local Industrial Union
it 292 Affiliated with the Committee for Industrial Organization, 7 N. L. R. B. 486; and
Matter of Utah Cooper Company, a corporation, et al., and International Union of Mine,
Mill, and Smelter Workers, Local No. 392, 7 N. L. R. B. 928.
" Matter of Goodyear Tire and Rubber Company of California and United Rubber Workers
of America, Local 131, 3 N. L. R. B. 431. •
6• Matter of John Minder d Son, Inc. and Butchers Union, Local No. /74, 6 N. L. R. B. 764.
59 See also : Matter of Hoffman Bevera ge Convpany and Joint Local Executive Board of
International Union of United Brewery, Flour, Cereal, and Soft Drink Workers of America.
3 N. L. R. B. 584; Matter of ;I. G. McDonald Chocolate Company, a corporation and Candy
Workers' Local No. 173. 5 N. L. R. B. 547; and Matter of Tennessee Electric Power Company
and International Brotherhood of Electrical Workers, 7 N. L. R. B. 24.
6 • Matter of Todd Shipyards Corporation, et al., and Industrial Union of Marine and
Shipbuilding Workers of America, 5 N. L. R. B. 20.
61 See also: Matter of Ohio Foundry Comnany and International Molders' Union of North
America, Local No. 218, et al., 3 N. L. R B. 701; Matters of Rossie Velvet Company and
Charles B. Rayhall and Textile Workers Organizing Committee of the Committee for Industrial
Organization, 3 N. L. R. B. 804: Matters of Jones Lumber Company, et al., and
Columbia River District Council of Lumber and Sawmill Workers' Union No. 5, etc., et al..
3 N. L. R. B. 855; Matter of Swift and Company and Packing House Workers Union. Local
No. 563, 4 N. L. R,. B. 770; Matter of Standard Oil Company or California and Oil Workers
•Internatimal Union, Local 299. 5 N. L. R. B. 750; Matter of Tennessee Copper Company and