rdb-elseif | Buildeey

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The precast concrete slab has tubular voids extending the full length of the slab,
			typically with a diameter equal to the 2/3-3/4 of the slab. This makes the slab much
			lighter than a massive floor slabs of equal thickness or strength. Reduced weight is
			important because of transportation cost and less cost of material (concrete). The slabs
			are typically 120 cm wide with standard thicknesses between 15 cm and 50 cm. All the
			thicknesses can be increased by 10 or 20 mm according the fire rate required.
			Hollowcore Slabs are made with G45 concrete and 3/8", ½” strands ASTM A416 as
			standard.
			Slabs are usually produced in lengths of about 150 meters. The process involves
		extruding wet concrete (semi dry mix) along with the prestressing strands from a
		moving mold. The continuous slab is then cut by big diamond circular saw according to
		the lengths (and width) required on blueprint. Factory production provides the obvious
		advantages of reduced time, labor and training.

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