The Magnacore® Self Drilling Anchor (SDA) from Intech Anchoring is designed to address challenging soil conditions where traditional micropiles may not be suitable.

Magnacore has a full line of hollow bars anchor rods to meet your project’s needs including:

  • R32
  • R38
  • R51
  • T40
  • T52
  • T76

Our standard stock length of bar are 4.92 ft (1.5 m) and 9.84 ft (3 m). The standard bar is non-galvanized. Galvanized bars can be ordered custom. 

Special orders can be placed for custom bar lengths, sizes, and bit sizes.


The Magnacore® Self Drilling Anchor is a hollow bar injection-bore micropile that offers an economical solution in situations such as collapsible soils, areas with large boulders, or other obstructions.

The micropile installation process involves a single, top-down operation. The hollow bar serves as the drill string, and a high-pressure, neat cement grout mixture is injected through the bar. The grout mixture acts as both the drilling medium and the reinforcement for the micropile. As the neat grout mix exits through grout ports located at the end of the sacrificial bit, it permeates into the surrounding loose soils.

This combination of injecting the neat grout mix and its subsequent permeation into the adjacent soils forms a competent reinforced grout column. The grout column provides structural support and enhances the load-bearing capacity of the micropile in challenging soil conditions. By using the injection-bore technique, hollow bar eliminates the need for open-hole drilling and allows for efficient installation even in difficult ground conditions.

Magnacore offers an economical and effective alternative for situations where conventional micropiles may encounter difficulties due to specific soil characteristics or obstructions in the ground.


Magnacore’s full line of accessories:

  • Couplers
  • Hex Nuts
  • Drill Bit Adapters
  • Spherical Nuts
  • Sleeved Pipe
  • Centralizers
  • Bearing Plates
  • Bevel Washers



In projects with limited access or weak soil conditions, Magnacore micropiles prove to be highly beneficial and suitable for a variety of applications. Micropiles have emerged as a preferred method for stabilizing deep foundations due to their reliability, versatility, and efficiency.

Learn more!


Soil nails are used in the construction of earth retention systems to provide support in areas requiring deep excavations or where slope stability is a concern. The design of these systems must address factors like movement control, stability during construction, and wall drainage. Magnacore is a suitable option for such projects, as it can be utilized for stabilizing slopes, soldier pile and lagging installations, as well as soil nail applications.

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A tieback is a horizontal rod used to reinforce retaining walls for stability. With one end of the tieback secured to the wall, the other end is anchored into the earth with sufficient resistance. By utilizing Magnacore self drilling anchors for tiebacks, you can save time and is more cost effective with the quick, efficient, all-in-one installation.

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Bar Type Outer Diameter Inner Diameter Area Ultimate Load (Pu) Yield Load (Py) Ultimate Stress (Fu) Yield Stress (Fy) Weight
MCR32/15 1.26 in
    (32 mm)
    0.59 in
      (15 mm)
      0.79 in2
        (510 mm2)
        81 kips
          (360 kN)
          63 kips
            (280 kN)
            102 ksi
              (706 MPa)
              80 ksi
                (549 MPa)
                2.69 lbs/ft
                  (4.00 kg/m)
                  MCR38/18 1.50 in
                    (38 mm)
                    0.71 in
                      (18 mm)
                      1.17 in2
                        (752 mm2)
                        124 kips
                          (550 kN)
                          101 kips
                            (450 kN)
                            106 ksi
                              (731 MPa)
                              87 ksi
                                (598 MPa)
                                3.96 lbs/ft
                                  (5.90 kg/m)
                                  MCR51/29 2.01 in
                                    (51 mm)
                                    1.14 in
                                      (29 mm)
                                      1.78 in2
                                        (1146 mm2)
                                        180 kips
                                          (800 kN)
                                          142 kips
                                            (630 kN)
                                            101 ksi
                                              (698 MPa)
                                              80 ksi
                                                (550 MPa)
                                                6.05 lbs/ft
                                                  (9.00 kg/m)
                                                  MCT40/20 1.57 in
                                                    (40 mm)
                                                    0.79 in
                                                      (20 mm)
                                                      1.22 in2
                                                        (790 mm2)
                                                        121 kips
                                                          (539 kN)
                                                          97 kips
                                                            (430 kN)
                                                            99 ksi
                                                              (682 MPa)
                                                              79 ksi
                                                                (544 MPa)
                                                                4.17 lbs/ft
                                                                  (6.20 kg/m)
                                                                  MCT40/16 1.57 in
                                                                    (40 mm)
                                                                    0.63 in
                                                                      (16 mm)
                                                                      1.42 in2
                                                                        (917 mm2)
                                                                        148 kips
                                                                          (560 kN)
                                                                          118 kips
                                                                            (525 kN)
                                                                            104 ksi
                                                                              (720 MPa)
                                                                              83 ksi
                                                                                (573 MPa)
                                                                                4.84 lbs/ft
                                                                                  (7.20 kg/m)
                                                                                  MCT52/26 2.05 in
                                                                                    (52 mm)
                                                                                    1.02 in
                                                                                      (26 mm)
                                                                                      1.92 in2
                                                                                        (1236 mm2)
                                                                                        209 kips
                                                                                          (929 kN)
                                                                                          164 kips
                                                                                            (730 kN)
                                                                                            109 ksi
                                                                                              (752 MPa)
                                                                                              86 ksi
                                                                                                (591 MPa)
                                                                                                6.52 lbs/ft
                                                                                                  (9.70 kg/m)
                                                                                                  MCT76/45 2.99 in
                                                                                                    (76 mm)
                                                                                                    1.77 in
                                                                                                      (45 mm)
                                                                                                      3.89 in2
                                                                                                        (2510 mm2)
                                                                                                        427 kips
                                                                                                          (1900 kN)
                                                                                                          337 kips
                                                                                                            (1500 kN)
                                                                                                            110 ksi
                                                                                                              (757 MPa)
                                                                                                              87 ksi
                                                                                                                (598 MPa)
                                                                                                                13.24 lbs/ft
                                                                                                                  (19.70 kg/m)

                                                                                                                  HOW TO INSTALL HOLLOW BAR

                                                                                                                  Tim Comb


                                                                                                                  Tim is the President of Intech Anchoring and has 25 years of experience in the Civil Engineering and Geostructural Industry. Tim has developed extensive industry knowledge by working to support the needs of specialty contractors at each and every business level. Tim’s diverse industry background has given him exposure to a wide variety civil construction projects, ranging from the simplest residential applications to the most complex commercial and industrial projects. Coupled with a highly skilled and educated team, Tim focuses on providing the highest quality products and solutions to Intech Anchoring’s customers in order to consistently exceed expectations.