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hollow steel screw thread steel bar

Basic Info

Model No.: D25/D76

Product Description

hollow steel screw thread steel bar:

 

hollow steel screw thread steel bars are successfully used for anchoring in poor ground, cohesive and non-cohesive soils, and in case of unstable boreholes. 

1) Hot rolling technique.Raw surface or hot dip galvanized surface treatment.

2) hollow anchor bar with continuous hot-rolled outside thread.Left/right hand thread,standard ISO10208/ISO1720

3) Dia:25-76mm,Length: 1m-6m.

4) Material:Alloy Steel.

 

Applications: Tunneling and Mining,Rock bolting,Face anchoring,Reinforcement ahead of the tunnel face,Foot piles,Tunnel portals, trenches, and cut and cover areas.

 

 

 

Specification:

 

Item

Outer diameter

Inner diameter

Ultimate load

Yield load

Weight

Thread type

 

mm

mm

KN

KN

Kgs/m

 

1

25

13

200

150

2.4

ISO10208

2

32

20

220

160

2.9

-

3

32

18.5

280

230

3.2

-

4

32

15

360

280

4.0

-

5

38

21

500

400

4.8

-

6

38

19

500

400

5.8

-

7

51

36

550

450

6.8

-

8

51

33

800

630

7.8

-

9

76

51

1600

1200

15.6

ISO1720

10

76

45

1900

1600

20

-

11

30

11

320

260

3.2

-

12

30

14

260

220

2.8

-

13

30

16

220

180

2.7

-

14

40

18

660

525

6.3

-

15

40

16

660

525

7.2

-

16

40

20

539

430

5.3

-

17

52

26

929

730

9.5

-

 

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