This section is from the book "The Building Code Of The City Of Boston", by City of Boston Building Department. Also available from Amazon: Building Code of the City of Boston.
Certain words are defined as follows: -
Par. 1. - (1.) A tenement house is any house, building, structure or portion thereof, occupied, or adapted for occupation, as a dwelling by more than three families living independently of one another and doing their cooking upon the premises, or by more than two families above the first story so living and cooking. A family living in a tenement house may consist of one or more persons.
Par. 2. - An existing tenement house is any building erected as such or converted to such use or as altered for such use or so used before the passage of this act, and any building adapted for such use, provided that a permit was issued for the erection of said building before the passage of this act.
Par. 3. - A tenement house hereafter erected is any tenement house other than an existing tenement house as above defined.
Par. 4. - (2.) A corner lot is a lot situated at the junction of two or more streets, or of two or more streets and alleys or open passageways not less than fifteen feet in width.
Par. 5. - (3.) A yard is an open unoccupied space on the same lot with a building and between the extreme rear line of said building and the rear line of the lot.
Par. 6. - (4.) A court is an open unoccupied space other than a yard on the same lot with a building. An inner court is a court not extending to a street, or alley, or open passageway, or yard. An outer court is a court extending to a street, or alley, or open passageway, or yard. A vent court is an inner court for the lighting and ventilation of water-closets, bathrooms, public halls, and stair halls only. An intake is a passageway connecting an inner court with a street, or alley, or open passageway, or yard.
Par. 7. - (5.) A shaft, whether for air, light, elevator, dumbwaiter, or any other purpose, is an enclosed space within a building, extending to the roof, and covered either by a skylight or by the roof. A vent shaft is a shaft used solely to ventilate or light water-closet compartments or bathrooms or kitchenettes.
Par. 8. - (6.) A public hall is a hall, corridor, or passageway not within an apartment.
Par. 9. - (7.) A stair hall includes the stairs, stair landings, and those parts of the public hall through which it is necessary to pass in going from the entrance floor to the roof.
Par. 10. - (8.) An apartment is a room, or suite of two or more rooms, occupied or suitable for occupation, as a residence for one family.
Par. 11. - (9.) Repairs means any renewal of any existing part of a building, or of its fixtures or appurtenances, which does not lessen the strength of the building.
[1921, c. 289, Sect. 5.]
 
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