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Ground Anchor Systems
Concrete Anchor Systems
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Threaded Bars with Fasteners
Tie Rods & Tie Backs
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Concrete Forming Hardware Systems
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Hollow-Core Threaded Bars

Threaded
Bar Types
Hollow-Core
Information
Hollow-Core
Accessories
Case
Histories
Corrosion
Protection
Hollow Core Threaded Bar
Our R1H Hollow-Core Threaded Rods come in lengths up to 32' and strengths up to 300 Kips. It is used in operations such as grouted earth anchors.  Bars come standard with N.C. thread forms.
Structural Properties
Yield Stress
Ultimate Stress
91 KSI
(91 MPa)
124 KSI
(854 MPa)
Elongation in 2"
(51 mm) bar diameter
Reduction
of Area
14% 40%
UNC Thread Form

Standard NC Thread Form

R1H Hollow Core Threaded Bar - ASTM A615 Deformation Pattern
Bar
Diameter
Minimum
Net Area
Thru Threads
Minimum
Ultimate
Strength
Minimum
Yield
Strength
Approx.
Thread
Major Dia.
Part
Number
1"- 8 UNC
(25 mm)
0.535 in2
(345 mm2)
66 kips
(294 kN)
47 kips
(209 kN)
1"
(25 mm)
R1H-08
1-3/8" - 8 UN
(35 mm)
1.12 in2
(720 mm2)
138 kips
(614 kN)
100 kips
(445 kN)
1-3/8"
(35 mm)
R1H-11
2" - 6 UN
(51 mm)
2.43 in2
(1566 mm2)
300 kips
(1334 kN)
219 kips
(974 kN)
2"
(51 mm)
R1H-16
Williams Form Engineering Corp.
Threaded
Bar Types
Hollow-Core
Information
Hollow-Core
Accessories
Case
Histories
Corrosion
Protection
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