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CADWELD® Rebar Splices

CADWELD® Rebar SplicesPrint this page

For the most demanding applications, the CADWELD® mechanical splicing system has extremely high tensile performance. It is the only rebar splicing system that has been used in over 200 Nuclear Power Plant projects throughout the world.

The CADWELD rebar splice is a mechanical butt splice (a metal filled splice, not a welded splice) that produces a joint with basically the same mechanical properties as those of an unspliced bar. CADWELD rebar is very suitable for in-situ splicing applications.

Features

  • No special skills required
  • Works on all grades of steel with deformations
  • Can be visually inspected
  • No special bar end preparation needed
  • Designed to meet or exceed many major Building Code requirements
  • World’s most tested mechanical splice - over 25,000 actual tensile tests
  • Consistently develops minimum ultimate strength of the rebar (150% of yield on grade 60 bars according to ASTM A615)
  • Requires hand-held equipment only (no heavy hydraulic non-electrical equipment), thus can deal with minimum bar spacing
  • Retrofit and repair with short dowels

Applications

  • The primary usage for CADWELD is related to critical structures requiring high safety margins such as:
    • Blast resistant facilities
    • Pressure vessel applications
    • Seismic resistance
    • Nuclear reactor containment structures
    • In-situ splicing applications
  • It is also excellent for joining circumferential bars

More Information

How CADWELD Works
The CADWELD splice utilizes an internally grooved sleeve working in conjuction with the rebar deformations. Load is transferred from the rebar to the sleeve via CADWELD filler material. The finished connection develops strength and consistency without equal in the industry.

How to Specify
By Name: 
For full tensile strength specify - CADWELD Full Tensile Strength Splices.

By Generic Description:
On jobs requiring a generic description (usually government specifications prohibit the use of a proprietary name) use the following description:

Type of splice required is sleeve with ferrous filler material to achieve...

How to Install CADWELD T-Series Horizontal Splice
1. Ensure you have the following components to make one splice:

    Expendable Components required for each splice
    • Sleeve Only
    • CADWELD Ferrous Filler Material
    • Guide Video Tape
    • Pouring Basin Ceramic
    • Crucible Ceramic
    • Disk
    • Packing Material
    • Spacer
    Non-expendable Hardware required to make all splices
    • Crucible Frame
    • Crucible Extension
    • Crucible Cover
    • Flint Igniter
    • End Alignment Fitting (x2)
    • Horizontal Pouring Basin Frame
    • Horizontal Packing Clamp
    Components provided with kits on prorated basis
    • Pouring Basin
    • Crucible

2. Clean the rebar of surplus particles and make sure it is free of moisture by pre-heating it, add spacer and position (centre) the sleeve over the rebar join.

3. Position the End Alignment Fittings over the rebar at each end of the sleeve. Insert the Packing Material around the rebar inside the Alignment Fitting.

4. Attach the Horizontal Packing Clamp to the rebar.

5. Insert Guide Tube and then Pouring Basin Ceramic into the Sleeve outlet. Position the Horizontal Pouring Basin Frame over the sleeve.

6. Preheat all graphite components to make sure they are moisture free before installation

7. Position the Pouring Basin on top of the t-bar inserted in the Bottom Support Clamp (align with Pouring Basin Ceramic) and place crucible on top of the Pouring.

8. Insert Crucible Ceramic and then Disk

9. Pour CADWELD Ferrous Filler Material into the Crucible.

10. Position the Crucible Extension over the Crucible and cover with Crucible Cover.

11. Stand back and ignite with Flint Igniter. Allow a few seconds to cool before removing apparatus.

Please note that this is a guide to making a CADWELD splice only. Full instructions will be supplied at time of product purchase.

How to Install - CADWELD T-Series Vertical Splice
1. Ensure you have the following components to make one splice:

Expendable Components required for each splice
• Sleeve Only
• CADWELD Ferrous Filler Material
• Guide Video Tape
• Pouring Basin Ceramic
• Crucible Ceramic
• Disk
• Packing Material
• Spacer
Non-expendable Hardware required to make all splices
• Crucible Frame
• Crucible Extension
• Crucible Cover
• Flint Igniter
• End Alignment Fitting (x2)
• Vertical Pouring Basin Frame
• Bottom Support Clamp
Components provided with kits on prorated basis
• Pouring Basin
• Crucible

2. Clean the rebar of surplus particles, add spacer and position (centre) the sleeve over the rebar join.

3. Attach the Bottom Support Clamp beneath the sleeve allowing sufficient room for the End Alignment Fitting - attach the End Alignment Fittings onto the rebar at each end of the sleeve.

4. Insert the Packing Material around the rebar inside each End Alignment Fitting.

5. Insert Guide Tube and then Pouring Basin Ceramic into the Sleeve outlet.

6. Position the Pouring Basin on top of the t-bar inserted in the Bottom Support Clamp (align with Pouring Basin Ceramic) and place crucible on top of the Pouring Basin.

7. Attach the Crucible Frame to the Crucible and attach the Vertical Pouring Basin Frame to the Crucible Frame, Bottom Support Clamp, sleeve and rebar.

8. Insert Crucible Ceramic and Disk (usually supplied as one unit)

9. Pour CADWELD Ferrous Filler Material into the Crucible.

10. Position the Crucible Extension over the Crucible and cover with Crucible Cover.

11. Stand back and ignite with Flint Igniter. Allow a few seconds to cool before removing apparatus.

Note that this is a guide to making a vertical splice only. Full instructions will be supplied at time of product purchase.

Downloads

Related Products

Rebar Splicing Products for Nuclear Construction

Due to a policy of continued product development, specifications are subject to change without notice.
CADDY, CADWELD, CRITEC, ERICO, ERIFLEX, ERITECH, and LENTON are registered trademarks of ERICO International Corporation.