INSTRUCTION SHEET
LENTON LOCK
B-Series
TIGHTEN TIGHTEN Step 1: Read all instructions and procedures before
commencing splicing. Ensure the LENTON LOCK coupler is
D C B A A B C D sized properly for the bars being spliced and per project plans.
Product should arrive with bolts configured as shown in Figure 1.
One round point bolt should be on each end for sizes 10 (#3)
through 40mm. Two round point bolts should be on each end for
sizes 43 (#14) and 57 (#18).
Figure 1
Step 2: Ensure the rebar is free of any excessive dirt, concrete
slurry, rust, etc. which may affect product performance. Ensure
Figure 1 Assembly cross section maximum rebar lip does not exceed limits set in Figure 2.
Excessive shear lip interferes with rebar installation.
Maximum Rebar Shear
Rebar Size
Lip Diameter (A)
in mm Step 3: Insert rebar into LENTON LOCK coupler until contact
10 or 12 (#4) 0.57 14.5 is made with the center stop pin as shown in Figure 3. Rebar
14 or 16 (#5) 0.73 18.5 must be flush against center stop pin.
18 or 20 (#6) 0.93 23.5
22 (#7) 1.08 27.5
25 (#8) 1.16 29.4 Step 4 for coupler sizes 12(#4) 36(#11):
28 or 30 (#9) 1.32 33.5 For rebar sizes 40 through 57(#18), follow Alternate step 4 on
32 (#10) 1.48 37.5 the next page.
34 or 36 (#11) 1.67 42.5
For Caltrans Ultimate performance on sizes 32(#10) and 36(#11),
38 or 40 1.83 46.5
also follow Alternate step 4 on the next page.
43 (#14) 2.07 52.5
57 (#18) 2.62 66.5 To avoid bolts from vibrating loose, it is suggested that each bolt
Figure 2 Maximum shear lip be pre-torqued (Approximately <50% is recommended torque)
prior to applying final bolt torque.
Tighten bolts, beginning in the center of the coupler and working
to the outside (A to D). A standard wrench, impact wrench or nut
runner may be utilized to tighten the bolts.
Figure 3 Solid contact between bar and stop pin as shown.
*When using an air impact wrench it is recommended to use a wrench with double the torque rating identified. Impact sockets should always be used when using an
impact wrench. Additionally, check the air pressure and air flow requirements prior to installation. Refer to complete installation instructions provided with the product or
available at www.erico.com prior to commencing installation.
WARNING
1. ERICO products shall be installed and used only as indicated in ERICO product instruction sheets and training materials. Instruction sheets are available at www.erico.com and from your ERICO customer
service representative.
2. ERICO products must never be used for a purpose other than the purpose for which they were designed or in a manner that exceeds specified load ratings.
3. All instructions must be completely followed to ensure proper and safe installation and performance.
4. Improper installation, misuse, misapplication or other failure to completely follow ERICOs instructions and warnings may cause product malfunction, property damage, serious bodily injury and death.
The customer is responsible for:
a. Conformance to all governing codes.
b. The integrity of structures to which the products are attached, including their capability of safely accepting the loads imposed, as evaluated by a qualified engineer.
c. Using appropriate industry standard hardware as noted above.
SAFETY INSTRUCTIONS:
All governing codes and regulations and those required by the job site must be observed. Always use appropriate safety equipment such as eye protection, hard hat, and gloves as appropriate to the application.
CADDY, CADWELD, CRITEC, ERICO, ERIFLEX, ERITECH and LENTON are registered trademarks of ERICO International Corporation
TECHNICAL SUPPORT: PDF116_K 1 of 2 2007, 2008, 2009, 2010, 2012, 2013
www.erico.com ERICO International Corporation
INSTRUCTION SHEET
Table 1. Torque values for coupler sizes #4 (12mm) through #9 (30mm)
Pre-Torque is not required for these sizes
Average Torque to Number
Rebar Designation Coupler Socket Size
Shear Bolts of Bolts
Soft
In-lb Metric Canada in mm ft-lb N-m
Metric
- 10 - 10 LL12B1 1/2 13 150 205 6
#4 12 10 M 13 LL12B1 1/2 13 150 205 6
- 14 - - LL16B1 1/2 13 150 205 6
#5 16 15 M 16 LL16B1 1/2 13 150 205 6
- 18 - - LL20B1 1/2 13 150 205 8
#6 20 20 M 19 LL20B1 1/2 13 150 205 8
#7 22 - 22 LL22B1 5/8 16 250 340 8
#8 25 25 M 25 LL25B1 5/8 16 350 475 8
#9 28 30 M 29 LL28B1 5/8 16 350 475 10
- 30 - - LL28B1 5/8 16 350 475 10
Alternate Step 4:
Alternate Step 4 is required for sizes 40 through 57(#18), and for Caltrans Ultimate requirements sizes 32(#10) and 36(#11).
Pre-torque the bolts beginning in the center of the coupler and working to the outside (A to D). See table 2. Then go back to bolt A
and finish tightening the bolts, once again beginning in the center of the coupler and working to the outside (A to D). The head of the
bolt shears off when the proper torque is achieved. A standard wrench, impact wrench or nut runner may be utilized for the final
tightening of the bolts.
Table 2. Alternate Step 4: Two-step torque sequence for coupler sizes 32(#10) and larger
Pre Torque Average Torque to Number of
Rebar Designation Coupler Socket Size
(all bolts if required) Shear Bolts Bolts
Soft
In-lb Metric Canada in mm ft-lb N-m ft-lb N-m
Metric
#10 32 - 32 LL32B1 13/16 21 400 545 500 680 8
- 34 - - LL36B1 13/16 21 400 545 550 750 10
#11 36 35 M 36 LL36B1 13/16 21 400 545 550 750 10
- 38 - - LL40B1 13/16 21 400 545 580 790 12
- 40 - - LL40B1 13/16 21 400 545 580 790 12
#14 43 45 M 43 LL43B1 1 25 675 915 960 1300 14
#18 57 55 M 57 LL57B1 1 25 675 915 960 1300 18
If bolt head does not shear, the installer should verify the appropriate torque was met (see Table 2). If a minimum cover must
be maintained, the head can be cut off after the proper torque has been applied.
If during installation the bolt strips, as defined by a loss of resistance to the applied torque, stop the installation immediately.
Remove the un-sheared damaged bolt. Contact ERICO for LENTON Technical Support
Repeat procedure for other end of the sleeve.
Transition Splices: LENTON LOCK is designed for use as a one-step transition/reducer splice on all types of rebar.
Contact ERICO for details.
Closure Pour Splices: Refer to instruction sheet PDF113 for details. Additional copies of instructions and application
information are available at www.erico.com
TECHNICAL SUPPORT: PDF116_K 2 of 2 2007, 2008, 2009, 2010, 2012, 2013
www.erico.com ERICO International Corporation
