B7S Spin-Lock Rock Bolt

Williams B7S Coil All-Thread Spin-Lock RockAnchor Bolt utilizes an ASTM 108 Grade C1045 steel which provides high strength capacity and has the advantage of utilizing a more common steel for greater availability.

B7S Structural Properties

Diameter
Range
Yield
Stress
Ultimate
Stress
Elongation in
2” Gauge Length
Reduction
of Area
1/2” to 1”
(13 to 25 mm)
92 KSI
(634 MPa)
120 KSI
(827 MPa)
11% min 20% min
1-1/8” and up
(29 mm)
81 KSI
(558 MPa)
105 KSI
(723 MPa)
11% min 20% min

Meets strength of ASTM A325

 

B7S Coil All-Thread Spin-Lock Rock Anchor

ASTM A108 Grade C1018

Dia &
Threads
per In
Recomm. Design
Load at Approx.
2:1 Safety Factor
Maximum
Working
Load to Yield
Average
Ultimate
Strength (7)
Drill Hole
Diameter
(1)
Type
Head
Ass’y</th
Torque ft-lbs Part
Number
To Expand
Shell (2)
On Nut for
Tension (5)
1/2” – 13
(13 mm)
8.45 kips
(37.6 kN)
13.0 kips
(57.7 kN)
16.9 kips
(75.2 kN)
1-1/4” – (32 mm)
1-5/8” – (41 mm)
A 10
A 13
50 ft-lbs
(70*)
85 B7S04A10
B7S04A13
5/8” – 11
(16 mm)
13.3 kips
(59.0 kN)
20.3 kips
(90.4 kN)
26.5 kips
(118 kN)
1-1/4” – (32 mm)
1-5/8” – (41 mm)
A 10
A 13
125 ft-lbs
(250*)
125 B7S05A10
B7S05A13
3/4” – 10
(19 mm)
20.0 kips
(88.9 kN)
30.6 kips
(136 kN)
40.0 kips
(178 kN)
1-3/4” – (44 mm)
1-3/4” – (44 mm)
B 14
C 14
210 ft-lbs
(250*)
210 B7S06B14
B7S06C14
7/8” – 9
(22 mm)
27.5 kips
(122 kN)
42.1 kips
(187 kN)
55.0 kips
(245 kN)
2” – (51 mm) B 16 390 ft-lbs
(410*)
390 B7S07B16
1” – 8
(25 mm)
35.4 kips
(157 kN)
54.3 kips
(241 kN)
70.8 kips
(315 kN)
2” – (51 mm) B 16 500 ft-lbs
(600*)
550 B7S08B16
1-1/8” – 7
(29 mm)
38.8 kips
(173 kN)
59.9 kips
(266 kN)
77.6 kips
(345 kN)
2” – (51 mm)
2-1/4” – (57 mm)
B 16
C 18
550 ft-lbs
(600*)
770 B7S09B16
B7S09C18
1-1/4” – 7
(32 mm)
50.8 kips
(226 kN)
78.5 kips
(349 kN)
102 kips
(452 kN)
2-1/4” – (57 mm)
2-1/2” – (64 mm)
C 18
B 20
750 ft-lbs
(1200*)
1000 B7S10C18
B7S10B20
1-1/2” – 6
(38 mm)
73.8 kips
(328 kN)
114 kips
(506 kN)
148 kips
(656 kN)
3” – (76 mm) B 24 1000 ft-lbs
(1700*)
Note (3) B7S12B24

NOTES:

(*) Do not exceed these numbers
(1) Care should be taken to drill a straight and properly sized hole.
(2) A function of strata strength. More torque may be required on long anchors or in special rock conditions. Consult your Williams Representative.
(3) Stress to desired tensile load using a hollow ram hydraulic jack. Consult your Williams Representative.
(4) ACI 355.1R section 3.2.5.1 indicates an ultimate strength in shear has a range of 0.6 to 0.7 of the ultimate tensile strength.Designers should provide adequate safety factors for safe shear strengths based on the condition of use.
(5) All above torque values are for greased (Moly Kote GN) threads.
(6) WILLIAMS reserves the right to ship full length or coupled units as necessary.
(7) Inconsistencies in rock from site to site and even from hole to hole may affect anchor performances. Fissures, voids, seams, rock unfonfinedcompressive strength (UCS), drilling through clay or bentonite and direction of bedding planes are all possible variables. Should problems occur, consult Williams for troubleshooting.

Head Assemblies

The Williams Spin-Lock anchor assembly gives full 300° bearing area. The smooth shell design allows for maximum shell to rock contact and eliminates “point of contact” created by serrated designs. The cone design supports the shell 300°, thereby eliminating any possible collapse of the shell under high load conditions. The thrust ring stop in front of the shell prevents any possible rebound of the expanded shell down the cone when subjected to nearby blasting. The Williams Spin-Lock anchor has been field proven on the world’s largest projects to far exceed in tension capacity any other mechanical anchor on the market.

Type A Short Shell & Cone

Head
Assembly
Drill Hole
Diameter
Bolt Diameter
& Pitch
Cone Shell Thrust Ring Slip
Rings
Overall
Assembly
Length
Length Part No. Length Part No. Diameter Thickness
A10 1-1/4”
(32 mm)
3/4” – 10 NC
(19 mm)
1-7/8”
(48 mm)
SC-114-4 1-7/8”
(48 mm)
SS-114 1-1/8″
(29 mm)
9/16″
(14 mm)
1/16″
(1.6 mm)
4-7/16”
(112 mm)
5/8” – 11 NC
(16 mm)
1-7/8”
(48 mm)
SC-114-5 1-7/8”
(48 mm)
SS-114 1-1/8″
(29 mm)
9/16″
(14 mm)
1/16″
(1.6 mm)
4-7/16”
(112 mm)
A13 1-5/8”
(41 mm)
1/2” – 13 NC
(13 mm)
1-7/8”
(48 mm)
SC-158-4 1-7/8”
(48 mm)
SS-158 1-1/2″
(38 mm)
9/16″
(14 mm)
1/16″
(1.6 mm)
3-3/4”
(95 mm)
5/8” – 11 NC
(16 mm)
1-7/8”
(48 mm)
SC-158-5 1-7/8”
(48 mm)
SS-158 1-1/2″
(38 mm)
9/16″
(14 mm)
1/16″
(1.6 mm)
3-3/4”
(95 mm)
* 1” – 8 NC
(25 mm)
1-7/8”
(48 mm)
SC-158-8 1-7/8”
(48 mm)
SS-158 1-1/2″
(38 mm)
9/16″
(14 mm)
1/16″
(1.6 mm)
4-1/8”
(108 mm)

*Hollow-Core Spin-Lock only.

 

Type B Long Shell & Cone

Head
Assembly
Drill Hole
Diameter
Bolt Diameter
& Pitch
Cone Shell Thrust Ring Slip
Rings
Overall
Assembly
Length
Length Part No. Length Part No. Diameter Thickness
B14 1-3/4”
(44 mm)
3/4” – 10 NC
(19 mm)
3-3/4”
(95 mm)
LC-158-6 3-3/4” LS-175 1-5/8”
(41mm)
15/16″
(24 mm)
1/16″
(1.6 mm)
8”
(203 mm)
1” – 8 NC
(25 mm)
3-3/4”
(95 mm)
LC-158-8 3-3/4” LS-175 1-5/8”
(41mm)
15/16″
(24 mm)
1/16″
(1.6 mm)
8-1/2”
(216 mm)
B16 2”
(51 mm)
7/8” – 9 NC
(22 mm)
2-1/2”
(64 mm)
LC-200-7 4”
(102 mm)
LS-200 1-7/8”
(48 mm)
15/16″
(24 mm)
1/16″
(1.6 mm)
7-3/8”
(187 mm)
1” – 8 NC
(25 mm)
2-1/2”
(64 mm)
LC-200-8 4”
(102 mm)
LS-200 1-7/8”
(48 mm)
15/16″
(24 mm)
1/16″
(1.6 mm)
7-3/8”
(187 mm)
1-1/8” – 7 NC
(30 mm)
2-1/2”
(64 mm)
LC-200-9 4”
(102 mm)
LS-200 1-7/8”
(48 mm)
1-1/8″
(29 mm)
1/16″
(1.6 mm)
7-1/2”
(191 mm)
B20 2-1/2”
(64 mm)
1-1/4” – 7 NC
(32 mm)
4”
(102 mm)
LC-250 4”
(102 mm)
LS-250 2-1/8”
(54 mm)
1-1/4″
(32 mm)
9/64″
(3.6 mm)
9-1/2”
(241 mm)
1-3/8” – 8 UN
(35 mm)
4”
(102 mm)
LC-250 4”
(102 mm)
LS-250 2-1/8”
(54 mm)
1-3/8″
( 35mm)
9/64″
(3.6 mm)
9-5/8”
(244 mm)
B24 3”
(76 mm)
1-3/8” – 8 UN
(35 mm)
5-1/2”
(140 mm)
LC-300 5-1/2”
(140 mm)
LS-300 2-3/4”
(70 mm)
1-3/8″
( 35mm)
1/8″
(3 mm)
12-1/2”
(318 mm)
1-1/2” – 6 NC
(38 mm)
5-1/2”
(140 mm)
LC-300 5-1/2”
(140 mm)
LS-300 2-3/4”
(70 mm)
1-1/2″
( 38mm)
5/32″
(4 mm)
12-7/8”
(325 mm)
1-3/4” – 5 NC
(45 mm)
5-1/2”
(140 mm)
LC-300 5-1/2”
(140 mm)
LS-300 2-3/4”
(70 mm)
1-3/4″
(45 mm)
1/8″
(3 mm)
13”
(330 mm)

 

Type C Long Shell & Cone w/Flange

Head
Assembly
Drill Hole
Diameter
Bolt Diameter
& Pitch
Cone Shell Thrust Ring Slip
Rings
Overall
Assembly
Length
Length Part No. Length Part No. Diameter Thickness
C14 1-3/4”
(44 mm)
3/4” – 10 NC
(19 mm)
4-1/4”
(108 mm)
LCF-175-6 3-3/4”
(95 mm)
LS-175 1-5/8″
(41 mm)
3/4″
(19 mm)
1/16″
(1.6 mm)
9”
(229 mm)
7/8” – 9 NC
(22 mm)
4-1/4”
(108 mm)
LCF-175-7 3-3/4”
(95 mm)
LS-175 1-5/8″
(41 mm)
1″
(25 mm)
1/16″
(1.6 mm)
9-3/16”
(233 mm)
1” – 8 NC *
(25 mm)
4-1/4”
(108 mm)
LCF-175-8 3-3/4”
(95 mm)
LS-175 1-5/8″
(41 mm)
1-1/4″
(32 mm)
1/16″
(1.6 mm)
9-3/16”
(233 mm)
C18 2-1/4”
(57 mm)
1-1/8” – 7 NC
(30 mm)
4-7/8”
(124 mm)
LCF-225-9 4”
(102 mm)
LS-225 2”
(51 mm)
1-1/4″
(32 mm)
1/16″
(1.6 mm)
10”
(254 mm)
1-1/4” – 7 NC
(32 mm)
4-7/8”
(124 mm)
LCF-225-10 4”
(102 mm)
LS-225 2”
(51 mm)
1-3/8″
(35 mm)
1/16″
(1.6 mm)
10-1/4”
(260 mm)
C28 3-1/2”
(89 mm)
1-7/8” – 8 UN
(48 mm)
7”
(178 mm)
LCF-350-16 6”
(152 mm)
LS-350 2-7/8”
(73 mm)
1-7/8”
(48 mm)
1/8″
(3.2 mm)
15”
(381 mm)
2” – 6 UN
(51 mm)
7”
(178 mm)
LCF-350-16 6”
(152 mm)
LS-350 2-7/8”
(73 mm)
2”
(51 mm)
1/8″
(3.2 mm)
15-1/8”
(384 mm)

*Hollow-Core Spin-Lock only.

 

Coupled Head Assemblies

Williams can manufacture Spin-Lock Anchor systems with the use of a transition coupling, which allows the anchor to be designed with a continuously workable thread-form. This is advantageous when the anchor length may need to be adjusted in the field due to variable site conditions. The transition coupling engages a continuously threaded U.N. bar into the head assembly and the All-Thread Bar (typically Grade 75 & Grade 80 All-Thread Rebar or 150 KSI All-Thread-Bar) is attached to the other end of the coupling.


H1F Heavy Duty Hex Nuts

Bar
Diameter
Across
Flats
Across
Corners
Thickness Part
Number
1/4”
(6.4 mm)
1/2”
(13 mm)
0.6”
(15 mm)
15/64”
(6 mm)
H1F-02
3/8”
(9.5 mm)
11/16”
(18 mm)
0.8”
(20 mm)
23/64”
(9 mm)
H1F-03
1/2”
(13 mm)
7/8”
(22 mm)
1.0”
(26 mm)
31/64”
(12 mm)
H1F-04
5/8”
(16 mm)
1-1/16”
(27 mm)
1.2”
(31 mm)
39/64”
(16 mm)
H1F-05
3/4”
(19 mm)
1-1/4”
(32 mm)
1.4”
(37 mm)
47/64”
(19 mm)
H1F-06
7/8”
(22 mm)
1-7/16”
(37 mm)
1.7”
(42 mm)
55/64”
(22 mm)
H1F-07
1”
(25 mm)
1-5/8”
(41 mm)
1.9”
(48 mm)
63/64”
(25 mm)
H1F-08
1-1/8”
(29 mm)
1-13/16”
(46 mm)
2.1”
(53 mm)
1-7/64”
(28 mm)
H1F-09
1-1/4”
(32 mm)
2”
(51 mm)
2.3”
(59 mm)
1-7/32”
(31 mm)
H1F-10
1-3/8”
(36 mm)
2-3/16”
(56 mm)
2.5”
(64 mm)
1-11/32”
(34 mm)
H1F-11
1-1/2”
(38 mm)
2-3/8”
(60 mm)
2.7”
(70 mm)
1-15/32”
(37 mm)
H1F-12
1-3/4”
(43 mm)
2-3/4”
(70 mm)
3.18”
(81 mm)
1-23/32”
(44 mm)
H1F-14
1-7/8”
(48 mm)
2-15/16”
(75 mm)
3.4”
(86 mm)
1-27/32”
(47 mm)
H1F-15
2”
(51 mm)
3-1/8”
(79 mm)
3.6”
(92 mm)
1-31/32”
(50 mm)
H1F-16
2-1/4”
(57 mm)
3-1/2”
(89 mm)
4”
(103 mm)
2-1/4”
(57 mm)
H1F-18

 

C2T Stopy-Type & Flange Couplings

Bar
Diameter
Outside
Diameter
Overall
Length
Stop-Type
Part Number
Flange Coupling
Flange Size Part Number
1/4”
(6.4 mm)
1/2”
(13 mm)
7/8”
(22 mm)
C2T-02
3/8”
(9.5 mm)
3/4”
(19 mm)
1-1/2”
(38 mm)
C2T-03 2” x 2”
(51 x 51 mm)
C2D-03
1/2”
(13 mm)
3/4”
(19 mm)
1-1/2”
(38 mm)
C2T-04 2” x 2”
(51 x 51 mm)
C2D-04
5/8”
(16 mm)
1”
(25 mm)
1-3/4”
(45 mm)
C2T-05 2” x 2”
(51 x 51 mm)
C2D-05
3/4”
(19 mm)
1-1/8”
(29 mm)
2”
(51 mm)
C2T-06 2” x 2”
(51 x 51 mm)
C2D-06
7/8”
(22 mm)
1-1/4”
(32 mm)
2-1/4”
(57 mm)
C2T-07 3” x 3”
(76 x 76 mm)
C2D-07
1”
(25 mm)
1-1/2”
(38 mm)
3”
(76 mm)
C2T-08 3” x 3”
(76 x 76 mm)
C2D-08
1-1/8”
(29 mm)
1-5/8”
(41 mm)
3-1/2”
(89 mm)
C2T-09 3” x 3”
(76 x 76 mm)
C2D-09
1-1/4”
(32 mm)
1-7/8”
(48 mm)
3-3/4”
(95 mm)
C2T-10 3” x 3”
(76 x 76 mm)
C2D-10
1-3/8”
(35 mm)
2-1/8”
(54 mm)
4”
(102 mm)
C2T-11 3” x 3”
(76 x 76 mm)
C2D-11
1-1/2”
(38 mm)
2-1/4”
(57 mm)
5”
(127 mm)
C2T-12 3” x 3”
(76 x 76 mm)
C2D-12
1-3/4”
(45 mm)
2-1/2”
(64 mm)
5-1/2”
(140 mm)
C2T-14 4” x 4”
(102 x 102 mm)
C2D-14
1-7/8”
(48 mm)
2-7/8”
(73 mm)
6”
(152 mm)
C2T-15
2”
(51 mm)
3”
(76 mm)
6”
(152 mm)
C2T-16
2-1/4”
(57 mm)
3-1/2”
(89 mm)
8”
(203 mm)
C2T-18

R9F Hardened Washers

Bar
Diameter
Outside
Diameter
Inside
Diameter
Thickness Part
Number
1/4”
(6.4 mm)
5/8”
(16 mm)
9/32”
(7 mm)
1/16”
(1.5 mm)
R9F-02-436
3/8”
(9.5 mm)
1”
(25 mm)
7/16”
(11 mm)
5/64”
(2 mm)
R9F-03-436
1/2”
(13 mm)
1-1/16”
(27 mm)
9/16”
(14 mm)
9/64”
(3.56 mm)
R9F-04-436
5/8”
(16 mm)
1-3/4”
(45 mm)
11/16”
(17 mm)
9/64”
(3.6 mm)
R9F-05-436
3/4”
(19 mm)
1-3/4”
(45 mm)
13/16”
(21 mm)
9/64”
(3.6 mm)
R9F-06-436
7/8”
(22 mm)
1-3/4”
(45 mm)
15/16”
(24 mm)
5/32”
(4 mm)
R9F-07-436
1”
(25 mm)
2”
(51 mm)
1-1/8”
(29 mm)
5/32”
(4 mm)
R9F-08-436
1-1/8”
(29 mm)
2-1/4”
(57 mm)
1-1/4”
(32 mm)
5/32”
(4 mm)
R9F-09-436
1-1/4”
(32 mm)
2-1/2”
(64 mm)
1-3/8”
(35 mm)
5/32”
(4 mm)
R9F-10-436
1-3/8”
(36 mm)
2-3/4”
(70 mm)
1-1/2”
(38 mm)
5/32”
(4 mm)
R9F-11-436
1-1/2”
(38 mm)
3”
(76 mm)
1-5/8”
(41 mm)
5/32”
(4 mm)
R9F-12-436
1-3/4”
(43 mm)
3-3/8”
(86 mm)
1-7/8”
(48 mm)
7/32”
(5.6 mm)
R9F-14-436
1-7/8”
(48 mm)
3-3/4”
(95 mm)
2-1/8”
(54 mm)
7/32”
(5.6 mm)
R9F-16-436
2”
(51 mm)
3-3/4”
(95 mm)
2-1/8”
(54 mm)
7/32”
(5.6 mm)
R9F-16-436
2-1/4”
(57 mm)
4”
(102 mm)
2-3/8”
(60 mm)
9/32”
(7 mm)
R9F-18-436

R8M Beveled Washers

Bar
Diameter
Degree
of Bevel
Outside
Diameter
Inside
Diameter
Maximum
Thickness
Minimum
Thickness
Part
Number
3/8”
(9.5 mm)
14° 1-1/4”
(32 mm)
9/16”
(14 mm)
7/16”
(11 mm)
1/8”
(3 mm)
R8M-03
1/2”
(13 mm)
14° 1-1/4”
(32 mm)
9/16”
(14 mm)
7/16”
(11 mm)
1/8”
(3 mm)
R8M-04
5/8”
(16 mm)
11° 1-9/16”
(40 mm)
13/16”
(21 mm)
1/2”
(13 mm)
3/16”
(5 mm)
R8M-06
3/4”
(19 mm)
11° 1-9/16”
(40 mm)
13/16”
(21 mm)
1/2”
(13 mm)
3/16”
(5 mm)
R8M-06
7/8”
(22 mm)
15° 2-1/16”
(52 mm)
1”
(25 mm)
3/4”
(19 mm)
1/4”
(6 mm)
R8M-08S
1”
(25 mm)
15° 2-1/16”
(52 mm)
1”
(25 mm)
3/4”
(19 mm)
1/4”
(6 mm)
R8M-08S
1-1/8”
(29 mm)
15° 2-13/16”
(71 mm)
1-5/16”
(33 mm)
1”
(25 mm)
5/16”
(8 mm)
R8M-09S
1-1/4”
(32 mm)
15° 3-3/8”
(86 mm)
1-9/16”
(40mm)
1-15/64”
(31 mm)
3/8”
(9.5 mm)
R8M-12S
1-3/8”
(36 mm)
15° 3-3/8”
(86 mm)
1-9/16”
(40 mm)
1-15/64”
(31 mm)
3/8”
(9.5 mm)
R8M-12S
1-1/2”
(38 mm)
15° 3-1/2”
(89 mm)
1-3/4”
(45 mm)
1-1/4”
(32mm)
3/8”
(9.5 mm)
R8M-13S
1-3/4”
(43 mm)
3-9/16”
(91 mm)
2-1/16”
(52 mm)
13/16”
(21 mm)
1/2”
(13 mm)
R8M-16
1-7/8”
(48 mm)
3-9/16”
(91 mm)
2-1/16”
(52 mm)
13/16”
(21 mm)
1/2”
(13 mm)
R8M-16
2”
(51 mm)
3-9/16”
(91 mm)
2-1/16”
(52 mm)
13/16”
(21 mm)
1/2”
(13 mm)
R8M-16

To achieve full strength of the system, beveled washers must be used in conjunction with a hardened washer.

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