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The concept and classification of prestressed steel strand

2014-11-04 17:08:19

The concept and classification of prestressed steel strand
Definition: (1) with good steel wire on the machine that has made according to the regulations of more than a twisted into the winding prestressed steel strand.

Prestressed steel strand types and purposes: (2) according to different configuration of the steel wire and use different can be divided into: galvanized prestressed steel strand, prestressed steel strand, prestressed concrete with aluminum bag of prestressed steel strand.

1) galvanized prestressed steel strand, galvanized prestressed steel strand is mainly used for hanger, hang, communication cable, overhead power line and fixed objects, is tied to.A, according to the section of galvanized prestressed steel strand structure can be divided into three types: 13, 17, 119,;B, depending on the galvanized prestressed steel strand nominal tensile strength, galvanized prestressed steel strand can be divided into 1175, 1270, 1370, 1470 and 1270 (N/was), a total of 5.C, according to the galvanized prestressed steel strand wire zinc layer thickness is different, galvanized prestressed steel strand can be divided into a level (thick), B (thick), c (thin).

(2) prestressed concrete prestressed steel strand, prestressed prestressed steel strand is made up of a circular section steel wire twisting for prestressed concrete structure, rock and earth anchoring such use of prestressed steel strand.A, according to the prestress of prestressed steel strand twist system structure is divided into 12, 13, 17 three.B, according to the stress relaxation performance is divided into Ⅰ level (relaxation common grade), Ⅱ level (low relaxation level).

(3) package of prestressed steel strand: aluminium bag of prestressed steel strand is mainly used for ground wire of aerial electric power line carrier cable and wire and electrification lines.According to the structure can be divided into four kinds: 13,17,119,137

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