prestressing steel

prestressing steel

High-strength steel (in the form of bars, rods, wires, etc.) which is used to prestress concrete.
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External bias: about 380 t prestressing steel, approximately 900 pieces of core drilling; Reinforcing announcement behavior: 300 t reinforcing steel, 650 m3 of concrete, about 48 000 pieces Xings;Renewal of drainage system: 2.
How it works is that post-tensioning tendons - which are prestressing steel cables inside plastic ducts or sleeves - are positioned in the forms before the concrete is placed.
Joining the officers on the PTI Executive Committee are Post-Tensioning Company Representative Todd Stevens of Gerdau-SFS Post-Tension Division; Professional Member Representative Cary Kopczynski; Associate Representative Paul Hohensee of Precision Hayes International; and, Prestressing Steel Manufacturer Representative Joseph Napoli of Insteel Wire Products.
To characterize the prestressing steel in tension, as discussed by Wang (2006), a tensile [sigma]-[epsilon] relationship for bare prestressing strands can be used since that the decreased stress in embedded tendons compared with bare strands is less significant than in embedded mild steel compared with bare steel bars.
The stress-laminated technique consists of a series of timber planks placed side by side between supports of the bridge and compressed transversely with high-strength prestressing steel bars.
THE EUROPEAN Commission has fined 17 producers of prestressing steel Euro 518 million for operating a cartel that lasted 18 years until 2002 and covered all but three of the then 15 European Union (EU) member states--Britain, Ireland and Greece.
The stress in the prestressing steel varies continually with time due to the effect of concrete shrinkage and creep, and the steel relaxation.
In addition, projects are underway to develop new technologies for the evaluation of prestressing steel in pre-stressed concrete, the evaluation of bridge substructures, and the development of special tools and methods to evaluate stay cables.
00 mA frost blanket, 29 500 mA asphalt construction, 3 800m Sickerrohrleitung, 2 100 m kerbstones, 1 300 mA of concrete, 200 tonnes of reinforcing steel, 17 t prestressing steel, 130 m railings, 110 m bat overflight assistance;Other AG~s Community Action Component 4,Verwaltungsgemeinschaft Southern.
All of the prestressing steel used in the specimens was Grade 270 (1,860 MPa [270 ksi] guaranteed ultimate tensile strength), seven-wire low-relaxation strand, conforming to American Society for Testing and Materials (ASTM) standard A416.
VSL's innovative heat-resistive post-tensioning tendons have been developed to mitigate the detrimental thermal effects of fire on the strength of the prestressing steel.
This larger strand helps by increasing the possible area of prestressing steel and by lowering the centroid of the prestressing force, which enhances the eccentricity of the force and effectiveness of the prestressing steel.