1. All of the plaintiffs' claims are dismissed.

2. The costs of lawsuit are assessed against the plaintiffs.

1. Basic facts

가. 원고들은 건설현장에 인력을 제공하는 등의 영업에 종사하는 개인사업자들이고, 피고는 토목건축공사업, 전기공사업, 준설공사업 등을 영위하기 위한 목적으로 1950. 1. 10. 설립된 회사이다.

B. The Defendant concluded a contract with the F Co., Ltd. for construction of new apartment units of Songpa-gu Seoul apartment units, construction of new apartment units from the F Co., Ltd., construction of new apartment units of Sejong Special Self-Governing City, construction of new apartment units of Sejong Special Self-Governing City, construction of new new apartment units of Changwon-si, and construction of new apartment units of K.

C. The Defendant subcontracted each of the above new construction works (hereinafter “the subcontracted construction of this case”) to L Co., Ltd. (hereinafter “L”).

(2) - 13,967,700 won (labor cost 4,967,700 won) of reinforced concrete construction (one construction section) on February 22, 2016; - 13,258,08,00 won of reinforced concrete construction (three construction sections) on March 18, 2016; 208,082,50 won (labor cost 9,456,684,900 won); 36.18,00 won of reinforced concrete construction (labor cost 9,456,684,900) on December 8, 2015; 208,000 won of reinforced concrete construction (one construction section); 12,496,00,000,000 won of them; 305,000 won of them; 36,058,000 won of them; 36,000 won of them