[CCMC 14122-R] CCMC Canadian code compliance evaluation

From: National Research Council Canada

In most jurisdictions this document is sufficient evidence for approval by Canadian authorities.

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Code compliance opinion

It is the opinion of the Canadian Construction Materials Centre that the evaluated product, when used as a steel pile in a foundation system in accordance with the conditions and limitations stated in this evaluation, complies with the following code:

National Building Code of Canada 2015

Code provision Solution type
4.2.3.10.(1) Where conditions are corrosive to steel, ...Acceptable
4.2.3.8.(1)(e) CSA G40.21, "Structural Quality Steel."Acceptable
4.2.4.1.(1) The design of foundations, excavations a ...Acceptable
9.4.1.1.(1)(c)(i) Part 9, orAcceptable

The above opinion is based on the evaluation by the CCMC of technical evidence provided by the evaluation holder, and is bound by the stated conditions and limitations. For the benefit of the user, a summary of the technical information that forms the basis of this evaluation has been included.

Product information

Product name:

G10 Pile / M2 Helical Piles

Product description

The product is a helical screw pile constructed of helical-shaped circular steel plates that are welded to a steel shaft. The plates are constructed as a helix with a carefully controlled pitch, similar to the thread on a screw.

The helical pile is summarized in the following table.

Table 1. Specifications of the product
Product Outside diameter Helix (diameter × thickness)
Pile type in. mm in. mm
G10/M2 3.0 76.2 10 × 0.375 254 × 9.5

 

The pile type and helix diameter are chosen based on the bearing capacity of the soil and the load the rotary-installed steel pile is designed to support. The central shaft is used to transmit torque during installation and to transfer axial loads to the helical plates. The foundation system comes with various other accessories such as support plates to adapt to the building structure, extension shafts and connectors.

The steel shaft, plates and accessories conform to CSA G40.20-13/G40.21-13, “General Requirements for Rolled or Welded Structural Quality Steel/Structural Quality Steel.”

The figure below shows a typical steel pile.

Illustration of G10 Pile / M2 Helical Pile.
Figure 1. G10 Pile / M2 Helical Pile

Manufacturing plant

This certification is valid only for products produced at the following plant:

  • Kitchener, Ontario, Canada

  Conditions and limitations

The CCMC’s compliance opinion is bound by this product being used in accordance with the conditions and limitations set out below.

  • The product under this evaluation is intended to be used as a foundation system to support the following types of construction:
    • Single storey residential buildings within the scope of Part 9 of NBC 2015;
    • Accessory buildings such as sheds, gazebos, sunrooms, carports, and decks/porches within the scope of Part 9 of NBC 2015.

    Other applications are beyond the scope of this evaluation, wherein a professional geotechnical engineer skilled in such design and licensed to practice under the appropriate provincial or territorial legislation must determine the pile capacity and other design parameters required in accordance with Part 4 of NBC 2015 and confirm by on-site load tests.

  • The product may be used as part of a foundation system to support various constructions, provided that it is installed according to the manufacturer’s current instructions and within the scope of this evaluation.
  • The structural application of these products shall be in strict accordance with the allowable load vs. applied torque tables prepared by Right Six Consulting, which are reproduced in Allowable compressive and tensile loads for the M2 pile in cohesive and cohesion-less soils.
  • When the product is installed in cohesive and cohesion-less soils, there is a direct relationship between the applied torque and the allowable compressive and tensile loads. The table Allowable compressive and tensile loads for the M2 pile in cohesive and cohesion-less soils indicates the allowable compressive and tensile loads as a function of the applied torque.
  • Load tests are required if the allowable loads need to be greater than those stated in Allowable compressive and tensile loads for the M2 pile in cohesive and cohesion-less soils. The tests must be conducted under the direct supervision of a professional geotechnical engineer who is skilled in such design and licensed to practice under the appropriate provincial or territorial legislation.
  • In all cases, a registered professional engineer skilled in such design and licensed to practice under the appropriate provincial or territorial legislation must determine the number and spacing of the rotary-installed steel piles required to carry the load. A certificate attesting to the conformity of the installation and the allowable loads for the piles must be provided.
  • The installation of the rotary-installed steel pile must be carried out as per the manufacturer’s instructions. The helical piles must be screwed into the ground to below the frost line using mechanized equipment. The helical pile is rotated into the ground with sufficient applied downward pressure to advance the helical pile one pitch-distance per revolution. The helical pile is advanced until the applied torque value attains a specified value. Extensions are added to the central shaft as needed. The applied loads may be tensile (uplift), or compressive (bearing). The piles are immediately ready for loading after installation.
  • In case of tensile or uplift forces, appropriate details at the connection between the pile and structure must be carried out by a registered professional engineer licensed to practice under the appropriate provincial or territorial legislation
  • Where conditions (soil and environmental) are determined to be corrosive to steel, protection of the steel shall be provided. The determination of the presence of corrosive conditions and the specification of the corrosion protection shall be carried out by a registered professional engineer licensed to practice under the appropriate provincial or territorial legislation. If the determination of the presence of corrosive conditions is not completed before installation the product and all its accessories, is required to be hot-dipped galvanized, meeting the requirements of ASTM A 123/A 123M, “Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products,” with a minimum thickness of 610 g/m2, or subjected to another method that provides an equivalent level of protection and abrasion resistance deemed acceptable by the CCMC.
  • The installer of the proposed rotary-installed steel piles must be certified by Ghent Construction Ltd. / Mascore Inc. using approved equipment. The installer must follow the manufacturer’s installation instructions and the uses and limitations specified in this evaluation. Each installer must carry a certification card bearing their signature and photograph.
  • The evaluation holder has proprietary interest in this evaluation and any use must be authorized by Ghent Construction Ltd. / Mascore Inc.
  • Each rotary-installed steel pile must be identified with a label that contains the manufacturer’s identification and the phrase “CCMC 14122-R.”

  Technical information

This evaluation is based on demonstrated conformance with the following criteria:

Evaluation requirements
Criteria number Criteria name
CCMC-TG-316216.01-15ACCMC Technical Guide for Augered-Installed Steel Piles

The evaluation holder has submitted technical documentation for the CCMC’s evaluation. The corresponding technical evidence for this product is summarized below.

Performance Requirements

The rotary-installed steel piles were tested to:

  • ASTM D 1143, “Standard Test Methods for Deep Foundations Under Static Axial Compressive Load,” and
  • ASTM D 4945 “Standard Test Method for High-Strain Dynamic Testing of Piles.”

Testing was conducted at two different sites that were selected because they represent typical soil profiles encountered in Canada. A series of tests was performed covering a range of typical sand-gravel and hard-clay to very-stiff-clay conditions. The intent of the testing was to determine a correlation between the torque applied during installation and the allowable loads. Testing showed a correlation between the torque applied during installation and the allowable loads. For the loads identified in the table below, the factor of safety applied was 3.0.

Table 2. Allowable compressive and tensile loads for the M2 pile in cohesive and cohesion-less soils
Applied torque Allowable loads compression Allowable loads tension
ft-lbs kN-m lbs kN lbs kN
250 0.3 686 3.1 583 2.6
500 0.7 1 372 6.1 1 166 5.2
750 1.0 2 057 9.2 1 748 7.8
1 000 1.4 2 743 12.2 2 332 10.4
1 250 1.7 3 429 15.3 2 915 13.0
1 500 2.0 4 115 18.3 3 498 15.6
1 750 2.4 4 801 21.4 4 081 18.2
2 000 2.7 5 486 24.4 4 663 20.7
2 250 3.1 6 172 27.5 5 246 23.4
2 500 3.4 6 858 30.5 5 829 25.9
2 750 3.7 7 544 33.6 6 412 28.6
3 000 4.1 8 230 36.6 6 996 31.1
3 250 4.4 8 916 39.7 7 579 33.7
3 500 4.7 9 601 42.7 8 161 36.3
3 750 5.1 10 287 45.8 8 744 38.9
4 000 5.4 10 973 48.8 9 327 41.5
4 250 5.8 11 659 51.9 9 910 44.1
4 500 6.1 12 345 54.9 10 493 46.7
4 750 6.4 13 030 58.0 11 076 49.3
5 000 6.8 13 716 61.0 11 659 51.9
5 250 7.1 14 402 64.1 12 242 54.5
5 500 7.5 15 088 67.1 12 825 57.0

Administrative information

Disclaimer

This evaluation is issued by the Canadian Construction Materials Centre (CCMC), a part of the Construction Research Centre at the National Research Council of Canada (NRC). The evaluation must be read in the context of the entire CCMC Registry of Product Assessments and the legislated applicable building code in effect.

The CCMC was established in 1988 on behalf of the applicable regulator (i.e., the provinces and territories) to ensure—through assessment—conformity of alternative and acceptable solutions to regional building codes as determined by the local authority having jurisdiction (AHJ) as part of the issuance of a building permit.

It is the responsibility of the local AHJs, design professionals, and specifiers to confirm that the evaluation is current and has not been withdrawn or superseded by a later issue. Please refer to the website or contact:

Canadian Construction Materials Centre
Construction Research Centre
National Research Council of Canada
1200 Montreal Road
Ottawa, Ontario, K1A 0R6
Telephone: 613-993-6189
Fax: 613-952-0268

The NRC has evaluated the material, product, system or service described herein only for those characteristics stated herein. The information and opinions in this evaluation are directed to those who have the appropriate degree of experience to use and apply its contents (i.e., AHJs, design professionals and specifiers). This evaluation is only valid when the product is installed in strict compliance with the stated conditions and limitations of evaluation and the applicable local building code. In circumstances where no applicable local building permit is issued and that no confirmation of compliance ‘for use in the intended field application’ is undertaken, this evaluation is null and void in all respects. This evaluation is provided without representation, warranty, or guarantee of any kind, expressed, or implied, and the NRC provides no endorsement for any evaluated material, product, system or service described herein. The NRC accepts no responsibility whatsoever arising in any way from any and all use and reliance on the information contained in this evaluation with respect to its compliance to the referenced code(s) and standard(s). The NRC is not undertaking to render professional or other services on behalf of any person or entity nor to perform any duty owed by any person or entity to another person or entity.

Language

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In the case of any discrepancy between the English and French version of this document, the English version shall prevail.

Copyright

© 2021 Her Majesty the Queen in Right of Canada, as represented by the National Research Council of Canada.

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of the CCMC.

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