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Ground Anchor Systems
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Geo-Drill Hollow Injection Bar

Threaded
Bar Types

Geo-Drill
Information

Geo-Drill
Accessories
Case
Histories
Corrosion
Protection
 
Structural Properties
Yield Stress
Ultimate Stress
85 KSI
(586 MPa)
105 KSI
(724 MPa)
Minimum Elongation
15%
150 KSI All-Thread-Bar
Unique Thread Form
 
B7X Geo-Drill Domestic Hollow Injection Bar
Bar
Diameter
Minimum Net
Area Through
Threads
Minimum
Ultimate
Strength
Minimum
Yield
Strength
Nominal
Weight
Average
Inner
Diameter
Part
Number
32 mm
(1-1/4”)
0.556 in2
(359 mm
2)
58.4 kips
(260 kN)
47.2 kips
(210 kN)
2.1 lbs/ft
(3.1 Kg/M)
0.787”
(20.0 mm)
B7X1-32
32X mm
(1-1/4”)
0.776 in2
(501 mm
2)
81.5 kips
(363 kN)
66.0 kips
(294 kN)
2.7 lbs/ft
(4.0 Kg/M)
0.626”
(15.9 mm)
B7X1-32X
38 mm
(1-1/2")
1.067 in2
(688 mm
2)
112 kips
(498 kN)
90.7 kips
(404 kN)
3.76 lbs/ft
(5.6 Kg/M)
0.830”
(21.1 mm)
B7X1-38
51 mm
(2")
1.795 in2
(1158 mm
2)
188 kips
(837 kN)
152 kips
(677 kN)
6.26 lbs/ft
(9.3 Kg/M)
1.187”
(30.1 mm)
B7X1-51
76 mm
(3”)
3.880 in2
(2503 mm
2)
407 kips
(1811 kN)
329 kips
(1466 kN)
13.79 lbs/ft
(20.5 Kg/M)
1.890”
(48.0 mm)
B7X1-76
Threaded Bar Profile
The Injection Bar is a high strength-impact resistant heavy wall steel tubing conforming to ASTM A519 which is continuously threaded over it's 10' length with a heavy duty left hand thread/deformation pattern. The steel tubing provides maximum flow with minimum resistance during high pressure flushing and grouting operations. The thread form (similar for all diameters) is a unique Williams feature that provides a lower thread pitch angle to provide easier coupling disengagement without “locking up”, than conventional rope threads during drilling operations. This thread form provides more surface area and thread/deformations per unit length for superior bond capabilities over that of competitive drill steel thread forms. The bar's thread/deformation pattern has also shown to exceed the bond characteristics of ASTM A615 reinforcing steel. The lower thread angle allows the installed anchor to be torque-tensioned for fast tie back installations. The Geo-Drill Injection Anchor system is available with enhanced corrosion protection with hot-dip galvanized/epoxy coated bars and components. Installation adapters for the Geo-Drill Injection Anchors are available for all drill rigs.
Williams Form Engineering Corp.
Threaded
Bar Types

Geo-Drill
Information

Geo-Drill
Accessories
Case
Histories
Corrosion
Protection
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