Prestressing Screw Bars

Prestressing Screw Bars (also called precision rolled threaded steel) are large-diameter, high-strength, high-dimensional precision straight bars with discontinuous external threads rolled on the entire steel bar. The steel bar can be connected with a connector with an internal thread or anchored with a threaded nut at any cross section.

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ADVANTAGES

Core advantages of Prestressing Screw Bars:

Prestressing Screw Bars can be directly matched with special nuts for anchoring, without welding or threading, and has a tensile strength of 835MPa~1230MPa, which is more than 30% higher than ordinary rebar (HRB500 grade about 630MPa), and is suitable for lifeline projects that require long-term stable load-bearing or dynamic loads.

USE

Highway bridges, railway bridges, urban interchanges, urban light rail, high-rise buildings, water conservancy and hydropower dams, port terminals, rock slope anchoring, foundation reinforcement, tunnel mine top anchoring, etc.

SPECIFICATIONS

Prestressing Screw Bars Mechanical Properties：

Mechanical Properties
Diameter / mm	Cross-sectional area / mm	Weight Kg/m	PSB830				PSB930				PSB1080
			Min Yield Stress/Load		Min Ultimate Stress/Load		Min Yield Stress/Load		Min Ultimate Stress/Load		Min Yield Stress/Load		Min Ultimate Stress/Load
			Mpa	KN	Mpa	KN	Mpa	KN	Mpa	KN	Mpa	KN	Mpa	KN
15	177	1.4	830	147	1030	182	930	165	1080	191	1080	191	1230	218
20	314	2.47	830	261	1030	323	930	292	1080	339	1080	339	1230	386
25	491	4.1	830	408	1030	506	930	457	1080	530	1080	530	1230	604
32	804	6.65	830	667	1030	828	930	748	1080	868	1080	868	1230	989
36	1018	8.41	830	845	1030	1049	930	947	1080	1099	1080	1099	1230	1252
40	1257	10.34	830	1043	1030	1295	930	1169	1080	1358	1080	1358	1230	1546
50	1963	16.28	830	1629	1030	2022	930	1826	1080	2120	1080	2120	1230	2414
Elongation at fracture A / %			≥7				≥7				≥6
Total Elongation at max force Agt / %			≥3.5
Relaxation at 1000h			≤4
Modulus of elasticity / Mpa			2 x 10⁵

PACKAGE

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