Key legal question
Whether the defendant's business falls within the materially applicable scope of the generally binding metal industry collective agreement.
Extracted holding
The business was not shown to be in direct competition with the participating metal-industry companies, so the generally binding GAV did not apply.
Extracted reasoning
For an industry GAV, the decisive factor is the activity giving the business its character and whether it competes directly with the organized sector covered by the agreement. Sun-shading installation may be construction-related, but that does not make the business a metal-working enterprise.