• Feature 

  ONTON^® Hollow Bar (Self Drilling Anchor, SDA) features a wide range of applications such as soil nails, micropiles, rock bolts, or ground anchors. It is applied to self-drilling ground control solution used in Civil Engineering and underground construction.                                                                                                                                                                                                                                                            

• Applications

  Civil Engineering	Underground Mining and Tunneling
  1. Pile foundation	1. Stabilization of tunnel portals, trenches, and cut-and-cover areas
  2. Slope and embankment stabilization	2. Forepoling
  3. Reinforcement of excavation pits and retaining walls	3. Face stabilization
  4. Foundation of pylons and wind mills	4. Radial rock bolting
  5. Anchorage of avalanche protection structures and noise barriers	5. Roof and rib bolting
  6. Injection works	6. Injection works

   
• Technical Data

• SDA (IBO) is a kind of safety product.
• Safe products is the most important thing of engineering safety.
• We only produce safe products.
• Security is not just lip service, See details of SGS test report ... 

                         CE                        ISO9001                TÜV Rheinland               SGS

                check it>>>                 check it>>>                  check it>>>                             check it>>>

 Good  Ductility checked on site by a bending test to 180 degrees, good  machinability and drillable:

• Established in the early 1990s.
• The first and best manufacturer of SDA ( Self-drilling Anchor Rock Bolt ) in China.
• ONTON Techology Co., Ltd. is the main compiling units of the Chinese Railway Standard named "Technical Regulations for Hollow Bolt". >>" href="/kf/HTB1zFr.IpXXXXXkXpXXq6xXFXXXj/200492548/HTB1zFr.IpXXXXXkXpXXq6xXFXXXj.jpg" target="_blank">>>>
• We participate in the ministry of railways Self-drilling Anchor Rock Bolt standards and almost all of the high-speed railway construction in china.
• OEM accepted.  >>>

 FAQ  for Hollow Anchor Bolt

1. Products standards:

‘EU Construction Products Directive’: EN 14199:2005 Micropiles and EN 14490:2010 Soil Nails.

2. What the EU standards require?

EN 14199:2005 “Micropiles”, clause 6.2.1 and EN 14490:2010 “Soil Nails”, clause 6.2.2.2 require:

Yield Stress, fyk, between 400 to 600 MPa (60 to 87 ksi)

Ductility (Elongation Agt > 5% required by EN 10080, ASASTM A615 , ASASTM A370)

All the required properties above are tested of Finished hollow-bar, NOT  raw materials.

3. What is A_gt?

Agt denotes the elongation up to ultimate load without reduction of cross-section.

It is not to be confused with total elongation, A, up to rupture.

Usually elongation, A, has double the value of Agt.