The Union of Construction and Wood (German: Gewerkschaft Bau und Holz, GBH; French: Syndicat du bâtiment et du bois) was a trade union representing workers in the building and woodworking industries in Switzerland.
The union was founded in 1922, when the Swiss Construction Workers' Union merged with the Swiss Woodworkers' Union, to form the Swiss Construction and Woodworkers' Union, with 15,232 members.
[1] It affiliated to the Swiss Trade Union Federation, and by 1954 was its second-largest affiliate, with 71,813 members.
[2] In 1974, it renamed itself as the GBH, and in 1986 it became the largest union in the country.
Unusually, at times, a majority of the member were non-Swiss nationals.