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As a kind of prestressed material, Screw Thread Steel Bar (PC bar) is widely used in large bridges of expressways and high-speed railways, rock and soil slope anchorage, building foundation and other engineering fields. The product has the advantages of simple connection and anchoring, safe and reliable, convenient construction, etc. PC Bar is a kind of high-strength and high-precision straight bar with external thread rolled on the whole bar. The reinforcement shall be connected or anchored by screwing a coupler or nut with internal thread on any section.

The high-strength pre-stressed threaded bars produced by our company are matched with various anchorages, connectors, and tool anchors for tensioning. The grades are PSB500/630, PSB785/930, PSB830/1030, PSB930/1080, PSB1080/1230, PSB1230/1380. The main diameters are 15mm, 18mm, 20mm, 25mm, 28mm, 32mm, 36mm, 40mm, 50mm, 63.5mm, 75mm and other specifications. The corresponding diameters can also be ordered according to the needs of users.

PRESTRESSING THREAD STEEL BAR

Steel grade	Yield strength MPa	Tensile strength MPa	Elongation at failure A%	Uniform elongtion Agt%	Stress relaxation
Steel grade	Yield strength MPa	Tensile strength MPa	Elongation at failure A%	Uniform elongtion Agt%	Original stress	Relaxation rate after 1000h r/%	Ralaxation rate after 10 r/%
PSB500	≥500	≥630	≥10		0.8R	≤3	≤1.5
PSB555	≥555	≥777	≥5				≤1.5
PSB785	≥785	≥980	≥7	≥3.5
PSB830	≥830	≥1030	≥6
PSB930	≥930	≥1080	≥6
PSB1080	≥1080	≥1230	≥6	≥2.5
PSB390	≥390	≥560	≥18

Nominal Diameter mm	Dv mm	Dh mm	H mm	B mm	L mm	Nominal sectional area mm2	Nominal Weight Kg/M
15	15	15	1	4.5	10	176	1.47
18	18	18	1.2	4	9	254.5	2.11
20	20	20	1.3	4.8	10	314	2.47
25	25	25	1.6	6	12	490.9	4.1
32	32	32	2.0	7	16	804.2	6.65
36	36	36	2.2	8	18	1018	8.41
40	40	40	2.5	8	20	1256.6	10.34
50	50	50	3.0	9	24	1963.5	16.28
63.5	63	63.5	3.0	--	22	3167	26.5

Spherical Nut and Anchor Nut

Nominal Diameter mm	Full force hex nut
Nominal Diameter mm	L	SW	Weight (kg/pc)
15	45	28.5	0.2
18	45	30	-
20	45	32	0.29
25	54	50	0.65
32	72	65	1.45
36	80	65	1.65
40	100	70	2.09
50	110	80	2.71
63.5	115	100	4.58

Nominal Diameter mm	Spherical hex nut
Nominal Diameter mm	L	SW	Weight (kg/pc)
15	45	28.5	0.18
18	45	30	-
20	45	32	0.21
25	54	50	0.60
32	72	65	1.35
36	80	65	1.50
40	100	70	2.00
50	110	80	2.60
63.5	115	100	4.58

Coupler

Normal Diameter mm	L mm	D mm	Φ mm	Weight (kg/pc)
15	80	30	15.3	0.32
25	126	50	25.4	1.35
32	168	60	32.5	2.25
36	180	70	36.6	3.6
40	220	74	41.0	4.63
50	270	88	51.0	8.05
63.5	260	102	64.0	9.50

Lock nut

Nominal Diameter mm	Lock nut
Nominal Diameter mm	H	S	D	Weight (kg/pc)
15	22	32	37	0.09
20	22	32	37	0.11
25	26.5	50	57	0.30
32	35.5	65	75	0.67
36	39.5	65	75	0.75
40	49.5	70	81	1.00
50	54.5	80	92	1.30
63.5	57.5	100	115	2.29

Plate

Normal Diameter mm	Size marking
Normal Diameter mm	L1	L2	R1	R2	Φ	Weight (kg /pc)
15	80	80		12	22	0.7
20	80	80		16	28	0.7
25	120	120	13.5	20	35	2.1/2.0
28	100	100		14	38	1.2
32	140	140	15.5	24	45	3.5/3.4
36	150	150	15	30	50	4.8/4.6
40	160	160	15	30	55	5.53/5.2
50	200	200	15	50	60	14.1
63.5	240	240		50		21.8

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