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Pre-tensioned concrete is a variant of prestressed concrete where the tendons are tensioned prior to the concrete being cast. [ 1 ] : 25 The concrete bonds to the tendons as it cures , following which the end-anchoring of the tendons is released, and the tendon tension forces are transferred to the concrete as compression by static friction .
Tung-Yen Lin (Chinese: 林同棪; pinyin: Lín Tóngyán; November 14, 1912 – November 15, 2003) was a Chinese-American structural engineer who was the pioneer of standardizing the use of prestressed concrete. [1]
The Freyssinet Test Arch (in French Arche d'essai Freyssinet) is a prestressed concrete arch built in 1909 in Moulins, Allier by Eugène Freyssinet1. [1] Its purpose was to test the resistance of this material to traction exerted on very flat and long-range arches. [1]
A device that tensions prestressed concrete tendons. [1]: 36 [3]: 35–36 stressing stool A device interposed between the stressing jack and the concrete member during tensioning operations, to allow manipulation of the anchor block and seating wedges. Often used during lift-off testing. swage
Prestressed concrete cylinder pipe (PCCP) is a common variety of large-diameter concrete pressure pipe used for transporting water and wastewater. PCCP is typical manufactured according to the American Water Works Association (AWWA) standard C304. [ 1 ]
Diagram of a concrete slab of hollow core construction Photograph of a hollowcore assembly. A hollow core slab, also known as a voided slab, hollow core plank or simply a concrete plank is a precast slab of prestressed concrete typically used in the construction of floors in multi-story apartment buildings.
A precast concrete walled house under construction An example of low-quality precast concrete with exposed dowels, connectors, indications of cracks, and malformations, even during its installation, Barangay Lantic, Carmona, Cavite, Philippines Interior view of the walls, supports, and roof of a precast commercial shop in Williston, North Dakota, US.
The Precast/Prestressed Concrete Institute (PCI) published the double tee load capacity calculation (load tables) for the first time in the PCI Design Handbook in 1971. The load tables use the code to identify double tee span type by using the width in feet, followed by "DT", followed by depth in inches, for example, 4DT14 is for 4-foot (1.2 m ...