B7S Spin-Lock Rock Bolt
Williams B7S Coil All-Thread Spin-Lock RockAnchor Bolt utilizes a C-1045 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 / C1045
| 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) |
75.5 kips (336 kN) |
116 kips (516 kN) |
151 kips (672 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 degree 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 Dia. & Thread Form |
Standard Cone Length & Part Num. |
Standard MAL Shell Length & Part Num. |
Overall Assy. Length |
|---|---|---|---|---|
| A10
1-1/4” |
1/2” – 13 NC (13 mm) |
1-7/8” SC-114-4 |
1-7/8” SS-114 |
4-1/4” (108 mm) |
| 5/8” – 11 NC (16 mm) |
1-7/8” SC-114-5 |
1-7/8” SS-114 |
4-1/4” (108 mm) |
|
| A13
1-5/8” |
1/2” – 13 NC (13 mm) |
1-7/8” SC-158-4 |
1-7/8” SS-158 |
3-3/4” (95 mm) |
| 5/8” – 11 NC (16 mm) |
1-7/8” SC-158-5 |
1-7/8” SS-158 |
3-3/4” (95 mm) |
|
| * 1” – 8 NC (25 mm) |
1-1/2” SC-158-8 |
1-7/8” SS-158 |
4-1/8” (108 mm) |
Type B: Long Shell & Cone
| Head Assembly & Drill Hole Diameter |
Bolt Dia. & Thread Form |
Long Cone Length & Part Num. |
Long MAL Shell Length & Part Num. |
Overall Assy. Length |
|---|---|---|---|---|
| B14
1-3/4” |
3/4” – 10 NC (19 mm) |
3-3/4” LC-158-6 |
3-3/4” LS-175 |
8” (203 mm) |
| 1” – 8 NC * (25 mm) |
3-3/4” LC-158-8 |
3-3/4” LS-175 |
8-1/4” (210 mm) |
|
| B16
2” |
7/8” – 9 NC (22 mm) |
2-1/4” LC-200-7 |
4” LS-200 |
6-7/8” (175 mm) |
| 1” – 8 NC (25 mm) |
2-1/4” LC-200-8 |
4” LS-200 |
6-7/8” (175 mm) |
|
| 1-1/8” – 7 NC (30 mm) |
2-1/4” LC-200-9 |
4” LS-200 |
7” (178 mm) |
|
| B20
2-1/2” |
1-1/4” – 7 NC (32 mm) |
4” LC-250-10 |
4” LS-250 |
9-3/8” (238 mm) |
| 1-3/8” – 8 UN (35 mm) |
4” LC-250-11 |
4” LS-250 |
9-1/2” (241 mm) |
|
| B24
3” |
1-3/8” – 8 UN (35 mm) |
5-1/2” LC-300-11 |
5-1/2” LS-300 |
12-1/2” (318 mm) |
| 1-1/2” – 6 NC (38 mm) |
5-1/2” LC-300-12 |
5-1/2” LS-300 |
12-5/8” (321 mm) |
|
| 1-3/4” – 5 NC (45 mm) |
5-1/2” LC-300-14 |
5-1/2” LS-300 |
12-7/8” (327 mm) |
Type C: Long Shell & Cone w/Flange
| Head Assembly & Drill Hole Diameter |
Bolt Dia. & Thread Form |
Long Cone w/ Flange Length & Part Num. |
Long MAL Shell Length & Part Num. |
Overall Assy. Length |
|---|---|---|---|---|
| C14
1-3/4” |
3/4” – 10 NC (19 mm) |
4-1/4” LCF-175-6 |
3-3/4” LS-175 |
9” (229 mm) |
| 1” – 8 NC * (25 mm) |
4-1/4” LCF-175-8 |
3-3/4” LS-175 |
9-3/16” (233 mm) |
|
| C18
2-1/4” |
1-1/8” – 7 NC (30 mm) |
4-7/8” LCF-225-9 |
4” LS-225 |
10” (254 mm) |
| 1-1/4” – 7 NC (32 mm) |
4-7/8” LCF-225-10 |
4” LS-225 |
10-1/4” (260 mm) |
|
| C28
3-1/2” |
1-3/4” – 5 NC (45 mm) |
7” LCF-350-16 |
6” LS-350 |
15” (381 mm) |
| 1-7/8” – 8 UN (48 mm) |
7” LCF-350-16 |
6” LS-350 |
15” (381 mm) |
|
| 2” – 6 UN (51 mm) |
7” LCF-350-16 |
6” LS-350 |
15-1/8” (384 mm) |
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 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) |
1-15/32” (37 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 |
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) |
1-15/32” (37 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 |
To achieve full strength of the nut, beveled washers must be used in conjunction with a hardened washer.
