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hollow anchor bar

Product name:R25 hollow anchor bar
Thread:R25
Outer Dia.:25mm
Inner Dia.:14mm
Weight:2.3kg/m
Surface treatment:Epoxy Coating or Hot-dipped Galvanization
Steel grade:42CrMo

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Rock Bolt

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Product Details

Description

The rolling process enhances the yield strength of the steel. The fully threaded hollow anchor bar allows drilling using a sacrificial drill bit at one end and another end to connect to the standard drill tool that works simultaneously for drilling and grouting. Full threading length of SDA makes it more beneficial to grate bonding to grout and tube and enable for drill rig connections and couplings.

Application

Slope stabilization
Self-Drilling Anchors are very suitable for weathered or un-consolidated rock stabilization. This technique is a more superior form of stabilization because the SDA technique is a relatively easy and fast method of installation compared to the outdated methods.
Foundations with micro piles
SDAs can be used like monopoles and micropile types because these are drilled piles composed of steel reinforcement with injected grout. These anchors are used like micropile type to stabilize the ground and related foundation problems. These anchors are suitable for tension and compression loads at varying ground conditions.
Tunneling
Self-drilling anchors are most suitable for the stabilization of tunnel strengthening works. Mostly for the soft rock and overburden soil conditions, the SDA’s are apt for rooftop protection.

Specification

NO.	Surface Treatment	Outer Dia. mm	Inner Dia. mm	Weight kg/m	Steel Type	Thread Type L/R Hand	Ultimate Load KN	Yield Load KN	Part Number
NO.	Surface Treatment	Outer Dia. mm	Inner Dia. mm	Weight kg/m	Steel Type	Thread Type L/R Hand	Ultimate Load KN	Yield Load KN	Part Number
1	Epoxy Coating or Hot-dipped Galvanization	25	14	2.30	EN10083-1=4140=42CrMo	L/R	200	150	R25N-14
2		32	21	2.90			280	230	R32N-21
3			18.5	3.40			280	230	R32N-18.5
4			16	3.60			360	280	R32S-16
5			15.5	3.80			405	350	R32SS-15.5
6		38	19	5.50			500	400	R38N-19
7		38	21	4.80			500	400	R38N-21
8		51	36	7.00			550	450	R51L-36
9		51	33	8.40			800	630	R51N-33
10		30	11	3.41			320	260	T30-11
11			14	2.87			275	220	T30-14
12			16	2.70			245	190	T30-16
13		40	16	6.60			660	525	T40-16
14		40	20	5.60			540	425	T40-20
15		52	26	9.87			925	730	T52-26
16		64	44	11.60			1042	900	RR64-44
17		73	53	14.10			1160	970	T73-53
18			56	10.75			1035	830	T73-56
19			45	17.80			1585	1270	T73-45
20			35	21.20			1865	1430	T73-35
21		76	45	15.00			1900	1500	T76S-45
22			51	19.70			1600	1200	T76N-51
23			54	15.80			1620	1220	RR76-54
24		103	78	25.30			2270	1800	T103-78
25		103	51	44.60			3660	2670	T103-51
26		108	82	27.90			2580	1980	RR108-82
27		111	82	25.00			2640	2000	T111L-82
28		111	75	34.50			3650	2750	T111N-75
29		127	111	28.90			2320	2030	T127-111
30		130	60	75.00			7940	5250	T130-60

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QUALITY INSPECTION PROCESS

Product quality is one of the core links in the development and growth of Yanggu Henglong Engineering Co., Ltd. Our company has strict internal and external inspection processes to ensure the quality of our products. Our inspection process for our products is as follows.

Rock Bolt