A roof is the top covering of a building, including all materials and constructions necessary to support it on the walls of the building or on uprights, providing protection against rain, snow, sunlight, extremes of temperature, and wind. A roof is part of the building envelope.
Slate is a fine-grained, foliated, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade, regional metamorphism. It is the finest-grained foliated metamorphic rock. Foliation may not correspond to the original sedimentary layering, but instead is in planes perpendicular to the direction of metamorphic compression.
The Actors' Equity Association (AEA), commonly called Actors' Equity or simply Equity, is an American labor union representing those who work in live theatrical performance. Performers appearing in live stage productions without a book or through-storyline may be represented by the American Guild of Variety Artists (AGVA). The AEA works to negotiate quality living conditions, livable wages, and benefits for performers and stage managers. A theater or production that is not produced and performed by AEA members may be called "non-Equity".
Industrial unionism is a trade union organising method through which all workers in the same industry are organized into the same union, regardless of skill or trade, thus giving workers in one industry, or in all industries, more leverage in bargaining and in strike situations. De Leon believed that militarized Industrial unions would be the vehicle of class struggle.
The American Federation of Labor was a national federation of labor unions in the United States that continues today as the AFL-CIO. It was founded in Columbus, Ohio, in 1886 by an alliance of craft unions eager to provide mutual support and disappointed in the Knights of Labor. Samuel Gompers was elected the full-time president at its founding convention and was re-elected every year except one until his death in 1924. He became the major spokesperson for the union movement.
Craft unionism refers to a model of trade unionism in which workers are organised based on the particular craft or trade in which they work. It contrasts with industrial unionism, in which all workers in the same industry are organized into the same union, regardless of differences in skill.
The United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union, commonly known as the United Steelworkers (USW), is a general trade union with members across North America. Headquartered in Pittsburgh, the United Steelworkers represents workers in Canada, the Caribbean, and the United States. The United Steelworkers represent workers in a diverse range of industries, including primary and fabricated metals, paper, chemicals, glass, rubber, heavy-duty conveyor belting, tires, transportation, utilities, container industries, pharmaceuticals, call centers, museums, and health care.
The International Brotherhood of Electrical Workers (IBEW) is a labor union that represents approximately 820,000 workers and retirees in the electrical industry in the United States, Canada, Guam, Panama, Puerto Rico, and the US Virgin Islands; in particular electricians, or inside wiremen, in the construction industry and lineworkers and other employees of public utilities. The union also represents some workers in the computer, telecommunications, and broadcasting industries, and other fields related to electrical work.
The United Brotherhood of Carpenters and Joiners of America, often simply the United Brotherhood of Carpenters (UBC), was formed in 1881 by Peter J. McGuire and Gustav Luebkert. It has become one of the largest trade unions in the United States, and through chapters, and locals, there is international cooperation that poises the brotherhood for a global role. For example, the North American Chapter has over 520,000 members throughout the continent.
The Boston police strike occurred on September 9, 1919, when Boston police officers went on strike seeking recognition for their trade union and improvements in wages and working conditions. Police Commissioner Edwin Upton Curtis denied that police officers had any right to form a union, much less one affiliated with a larger organization like the American Federation of Labor (AFL), which some attribute to concerns that unionized police would not protect the interest of city officials and business leaders. Attempts at reconciliation between the Commissioner and the police officers, particularly on the part of Boston's mayor, Andrew James Peters, failed.
Waterproofing is the process of making an object, person or structure waterproof or water-resistant so that it remains relatively unaffected by water or resisting the ingress of water under specified conditions. Such items may be used in wet environments or underwater to specified depths.
The Seafarers International Union or SIU is an organization of 12 autonomous labor unions of mariners, fishermen and boatmen working aboard vessels flagged in the United States or Canada. Michael Sacco was its president from 1988 until 2023. The organization has an estimated 35,498 members and is the largest maritime labor organization in the United States. Organizers founded the union on October 14, 1938. The Seafarers International Union arose from a charter issued to the Sailors Union of the Pacific by the American Federation of Labor as a foil against loss of jobs to the Congress of Industrial Organizations (CIO) and its Communist Party-aligned faction.
The International Union of Bricklayers and Allied Craftworkers (BAC) is a labor union in the United States and Canada which represents bricklayers, restoration specialists, pointers/cleaners/caulkers, stonemasons, marble masons, cement masons, plasterers, tile setters, terrazzo mechanics, and tile, marble and terrazzo finishers. The union is an affiliate of the AFL–CIO and its Building and Construction Trades Department. It is also affiliated with the Canadian Labour Congress in Canada.
The Structural Building Trades Alliance (SBTA) was an American federation of labor unions in the construction industry. It was founded in 1903 and existed until 1908, when it affiliated with the American Federation of Labor (AFL) and became the Building Trades Department.
Bituminous waterproofing systems are designed to protect residential and commercial buildings. Bitumen is a material made up of organic liquids that are highly sticky, viscous, and waterproof. Systems incorporating bituminous-based substrates are sometimes used to construct roofs, in the form of "roofing felt" or "roll roofing" products.
The International Federation of Professional and Technical Engineers (IFPTE) is a North American labor union representing various professional, technical, and administrative support workers in the United States and Canada, in both the public and private sectors.
The Building and Construction Trades Department, commonly known as North America's Building Trades Unions (NABTU), is a trade department of the American Federation of Labor and Congress of Industrial Organizations (AFL–CIO) with 14 affiliated labor unions in the building trades. It was originally founded by the American Federation of Labor in 1907.
The Tile, Marble, Terrazzo, Finishers', Shopworkers' and Granite Cutters' International Union (TMT) was a labor union representing construction workers who used marble and similar decorative materials, in the United States and Canada.
