Evidence

Lab tests: the bar breaks before the coupler.

Tensile tests in EMA-accredited laboratories, per ACI 318S-14 (25.5.7.1) and NTC-CDMX (6.6.1.6), with Type 2 evidence in all four bar sizes.

Summary by bar size

Results against the minimum.

Type 2 minimum with Grade 42 rebar: 63 kg/mm² (1.5 fy).

Bar size #6 19.0 mm · 3/4"

74.5 kg/mm²

min. 63

Range: 74.5

Atizapán–Atlacomulco Highway

Bar size #8 25.4 mm · 1"

81.8 kg/mm²

min. 63

Range: 72.5–81.8

IKEA Guadalajara · Heineken Grajales · Atizapán–Atlacomulco Highway

Bar size #10 31.8 mm · 1 1/4"

69.5 kg/mm²

min. 63

Range: 65.0–69.5

IKEA Guadalajara · Geotecnia test 2022

Bar size #12 38.1 mm · 1 1/2"

71.0 kg/mm²

min. 63

Range: 63.0–71.0

IKEA Guadalajara · Los Encinos Hospital

Rebar specimen with a Hybrid Coupler after the tensile test: the bar broke outside the coupler
Specimen after the tensile test: the bar broke outside the coupler.

Reports

Test by test.

Tensile strength obtained, in kg/mm². Full reports are provided on request.

IKEA Guadalajara

Zapopan, Jalisco

  • #874 kg/mm²
  • #1065 kg/mm²
  • #1263 kg/mm²

All three couplers qualify for use as Type II.

González & Beas (G&B) · EMA MM-0635-087/15 · 05/09/2022

Heineken Grajales · treatment plant expansion

Puebla

  • #872.5 – 75.0 kg/mm²

In every case, failure occurred in the bar. Meets Type I and II.

Geotecnia Control de Calidad y Construcciones · EMA C-0230-024/10 · MM-0735-107/16 · 01/03/2023

Atizapán–Atlacomulco Highway, phase III

State of Mexico

  • #674.5 kg/mm²
  • #875.0 and 81.8 kg/mm²

Tests stopped once the maximum load was recorded, with no specimen failure.

Geotecnia Control de Calidad y Construcciones · EMA C-0230-024/10 · MM-0735-107/16

Los Encinos Hospital

Naucalpan, State of Mexico

  • #1271 kg/mm²

Test stopped on reaching the capacity of the machine.

Geotecnia Control de Calidad y Construcciones · EMA C-0230-024/10 · MM-0735-107/16

Bar size #10 test

  • #1069.5 kg/mm²

Test stopped due to the capacity of the testing machine. Meets Type I and II.

Geotecnia Control de Calidad y Construcciones · EMA C-0230-024/10 · MM-0735-107/16 · 05/07/2022

Tensile test on three specimens

Puebla

  • #8Failure in the bar

All three specimens broke in the bar, with the coupler intact and no slippage.

BUAP · DITCo (university laboratory) · Report IGA-23-003 · 22/06/2023

Test standards: NMX-B-506-CANACERO and NMX-C-407-ONNCCE (Mexican standards). MOLBER Solutions (formerly Fussion-e): some reports carry the company's former name or the name of whoever requested the test.

Request full reports

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