hollow steel screw thread steel bar

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	-

 

Grupo de Produto : Tubo Especial