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In many domestic and industrial buildings, a thick concrete slab supported on foundations or directly on the subsoil, is used to construct the ground floor. These slabs are generally classified as ground-bearing or suspended. A slab is ground-bearing if it rests directly on the foundation, otherwise the slab is suspended. [3]
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 ...
Executive Order 14063, officially titled Use of Project Labor Agreements for Federal Construction Projects, was signed on February 4, 2022 and is the 79th executive order signed by U.S. President Joe Biden. The telos of the order is to require project labor agreements on federal construction projects.
The Boston Harbor reclamation project that began in the 1980s became the focus of debate over the legality of PLAs. [12] [13] When the Massachusetts Water Resources Authority elected to use a PLA for the project that mandated union-only labor, [14] the Associated Builders and Contractors of Massachusetts/Rhode Island, Inc. challenged its legality, asserting that the use of a PLA was prohibited ...
Heavily loaded concrete ground slabs and pavements can be sensitive to cracking and subsequent traffic-driven deterioration. As a result, prestressed concrete is regularly used in such structures as its pre-compression provides the concrete with the ability to resist the crack-inducing tensile stresses generated by in-service loading.
Tilt-up, tilt-slab or tilt-wall is a type of building and a construction technique using concrete. Though it is a cost-effective technique with a shorter completion time, [ 1 ] poor performance in earthquakes has mandated significant seismic retrofit requirements in older buildings.
As the temperature climbs to 100 degrees, the soil around a slab or pier and beam foundations shrinks and begins to move around and settle. This movement compresses the foundation, often creating ...
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.