High Tensile Strength Bar Coupler IMBMS-Bar Coupler
The couplers are designed to provide high tensile strength connections with external ribs or spanner flats, for easy gripping by hand tools; such as spanner, pipe wrench and chain wrench etc.
Coupler Bar
The IMBMS-Bar Coupler is designed to provide high-tensile strength connections between reinforcing steel bars. Its reinforced centre section provides additional strength without increasing the coupler's diameter, making it suitable for high-strength reinforcing applications. The coupler features external hexagonal knuckles to enhance bond strength and spanner flats at both ends for easy gripping and installation using standard hand tools. Each coupler is marked with its identification, size and production batch number for traceability.
Compliance NZBC
5mm bar and couplers were extensively tested by Holmes Solutions back in 2014. 12mm to 40mm bars tested by Opus NZ to ISO15835 slip test, tensile test and low cycle loading test.
a) Test Methods to ISO 15835-2:2009(E), ISO 15630-1:2010, BS EN ISO 6892-1:2009 & AS/NZS 4671:2001
b) To meet the ISO 15835-1:2009(E) Strength and ductility under static forces (clause 5.2) and Slip under static forces (clause 5.3)
c) To meet the ISO 15835-1:2009(E) Properties under low cycle reverse elastic-plastic loading (clause 5.5) for Couplers of category S2 (clause 5.5.2) Mode of failure was bar break outside the splice zone.
IMBMS-Bar Coupler (Normal-Temperature Swaged Bar)
Features and Benefits:
No heat applied, no upsetting, no thread cutting
Through normal-temperature swaging, original stress-resistance in tension and compression force is ensured
Concrete placement is easy thanks to the small diameter and short length of the coupler
Couplers are available for dissimilar sizes on request
Meets NZ 3101
Meets NZTA Bridge manual specification
Patent registration No.0316435
Typical Test Results – BS 8100 - Hot Rolled Bars BS.4449 | ||||
Nominal Bar Size | Yield Stress (N/mm²) | Ultimate Stress | Permanent Elongation | Failure Mode |
40 | 537 | 628 | 0.0721 | Bar break |
32 | 526 | 638 | 0.0518 | Bar break |
28 | 533 | 653 | 0.0480 | Bar break |
25 | 540 | 638 | 0.0014 | Bar break |
20 | 505 | 618 | 0.0021 | Bar break |
16 | 507 | 621 | 0.0048 | Bar break |
12 | 521 | 638 | 0.0040 | Bar break |
Coupler Size
BS.4449 | ||||||
Nominal bar size (Ømm) | 12 | 16 | 20 | 25(26) | 32 | 40 |
Coupler Diameter (mm) | 19 | 23 | 31 | 38 | 48 | 60 |
Hexagon-B (mm) | 17 | 21 | 29 | 36 | 46 | 56 |
Coupler Length | 30 | 38 | 46 | 58 | 70 | 86 |
Weldedable Coupler Size
BS.4449 | ||||||
Bar Size | 12 | 16 | 20 | 25 | 32 | 40 |
Coupler Diameter (mm) | 19 | 23 | 31 | 38 | 48 | 60 |
Coupler Length | 15 | 19 | 23 | 29 | 35 | 43 |
Form Saver
Coupler has an attached nail plate for accurate and easy fixing to wooden form.
BS. 4449 | |||||||
Bar Size | 12 | 16 | 20 | 25 | 28 | 32 | 40 |
Coupler Diameter (mm) | 19 | 23 | 31 | 38 | 43 | 48 | 60 |
Coupler Length | 30 | 38 | 46 | 58 | 65 | 70 | 86 |
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Our Partners
IMBMS is proud to partner with the following companies.
IMBMS Facts
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125 Million Since 1999 more than 15 million parallel threaded rebar couplers have been supplied for almost every form of civil and commercial structure imaginable, from Olympic stadiums to mass rapid transit systems, the prestigious Singaporean deep tunnel sewage system and high rise buildings including the Burj Khalifa.
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1999 Established in 1999, IMBMS has supplied the industry with couplers and terminators for over 25 years, optimising size and strength.