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In the early 1960s, middle-class owners of residential floor units in the building had their properties nationalized by the current government. In the 1970-1980s the building housed Soviet and Eastern bloc specialists and advisors and the ground store supermarket was for non-Cubans only. In 2000 an elevator cable snapped killing one person.
The area of floor around the columns must be reinforced in order to carry the load; if the columns are too narrow, they can punch through the slab. Examination of the building showed the concrete columns installed were only 60 cm in diameter, below the required 80 cm shown in the plans.
The new architectural designs included new construction practices such as lift-slab construction in order to simplify construction. By 1995, the chain had 18 stores, with the Old Gentilly Road store remaining the chain's largest. [1]: 247–271 Schwegmann Brothers Giant Supermarkets' last stores opened in 1993. [1]: 347
Lift slab construction (also called the Youtz-Slick Method) is a method of constructing concrete buildings by casting the floor or roof slab on top of the previous slab and then raising (jacking) the slab up with hydraulic jacks. This method of construction allows for a large portion of the work to be completed at ground level, negating the ...
Floor plans use standard symbols to indicate features such as doors. This symbol shows the location of the door in a wall and which way the door opens. A floor plan is not a top view or bird's-eye view; it is a measured drawing to scale of the layout of a floor in a building.
A concrete slab is a common structural element of modern buildings, consisting of a flat, horizontal surface made of cast concrete. Steel-reinforced slabs, typically between 100 and 500 mm thick, are most often used to construct floors and ceilings, while thinner mud slabs may be used for exterior paving (see below). [1] [2]
Instead, 7-foot-long (2.1 m) cantilevers supported the exterior walls above the third floor. [33] [e] The floors of the basements and upper floors were poured in 20.5 square feet (1.90 m 2) slabs. These slabs were 11 inches (28 cm) thick in the basements and on the first floor, and 9.5 inches (24 cm) thick on all other floors. [6]
Slabs are one of the greatest consumers of concrete in many buildings, [14] so reducing the slab mass can make a relatively large difference to the environmental impact of a building's construction. Biaxial slabs may be marginally cheaper than solid slabs, partly due to the lower mass.