Hollow Core Slab Pdf Download [WORK]
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The construction of hollow core slabs with a high strength is described in . According to , since hollow core slabs have a plastic zone, they are more elastic under vertical loads. The elastic zone of the hollow core slab is between the minimum and maximum compressive stress and is the zone in which the hollow slab becomes rigid. The plastic zone is the zone in which the hollow concrete slab is deformed and the concrete slab is destroyed . When the hollow core slab experiences a plastic zone, it is not possible to use the slab as a base for a floor slabs. The maximum compressive stress occurs when the hollow slab has an elongated hole or a hole that is smaller than the hollow slab. The minimum compressive stress occurs when the hollow slab has an elongated hole that is larger than the hollow slab. A slight movement of the hollow slab is possible .
Hollow core slabs can be fabricated with two or more panels. Hollow core slabs can also be precast with thin molds . The advantage of pre-casting is that it can be done on the factory and can be finished in the office. According to , it is possible to use slab casting on the hollow core slabs and the mold is moved to the construction site. When casting on the hollow core slabs, a wire mesh fabric reinforcement is needed for strengthening. Hollow core slabs can be produced on a hydraulic press and are ready for use at the construction site .
Hollow core slabs have a clear advantage when the floor beams are slender or when additional floor beams, such as diaphragms, are needed. The number of hollow core slabs determines the floor's strength and rigidity. It is possible to use straight columns (prestressed) and slender beams (AISC 21.1.1). It is also possible to use small floor beams that are tied together by inclined diaphragms (ASTM E30). The floor beams and diaphragms are protected from damage by the hollow core slab panels. If the floor beams are slender, the hollow core slab is used for transverse beams and diaphragms, to protect the slender beams from damage .
The Third Edition of the manual provides the most comprehensive set of guidelines available for the design and construction of hollow core slabs. The manual covers reinforced, prestressed, non-reinforced and fully hollow slabs. Two new chapters and a new chapter in the diaphragm chapter provide all the information necessary to construct a reinforced hollow core slab.
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