[CCMC 13675-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 an auger-installed 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

Ontario Building Code

Ruling No. 16-08-338 (13675-R) authorizing the use of this product in Ontario, subject to the terms and conditions contained in the Ruling, was made by the Minister of Municipal Affairs and Housing on 2016-11-25 pursuant to s.29 of the Building Code Act, 1992 (see Ruling for terms and conditions). This Ruling is subject to periodic revisions and updates.


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:

GoliathTech screw pile

Product description

The product is an earth anchor constructed of helical-shaped circular steel blades that are welded to a steel shaft. The blades are constructed as a helix with a carefully controlled pitch.

The anchor type and blade diameter are chosen based on the bearing capacity of the soil and the load the auger-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 plates and accessories conform to CSA G40.21 50W, “General Requirements for Rolled or Welded Structural Quality Steel / Structural Quality Steel,” 350 MPa.
  • The steel tubes conform to ASTM A 500/A 500M-13, “Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes,” Grade C, 320 MPa.
Table 1. Anchor types
Type Exterior pile shaft diameter Pile wall thickness Available helical blade diameter Helical blade thickness
Pile 1
7/8 in.
48 mm / 1.875 in. 3.9 mm / 0.154 in. From 228 mm / 8 in. to 431 mm / 17 in. 9.5 mm / 0.375 in.
Pile 2
3/8 in.
60 mm / 2.375 in. 3.9 mm / 0.154 in.  From 228 mm / 9 in. to 431 mm / 17 in. 9.5 mm / 0.375 in.
482 mm / 19 in. 12.7 mm / 0.500 in.
Pile 2
7/8 in.
73 mm / 2.875 in. 6.3 mm / 0.250 in. From 228 mm / 9 in. to 431 mm / 17 in. 9.5 mm / 0.375 in.
From 482 mm / 19 in. to 787 mm / 31 in. 12.7 mm / 0.500 in.
Pile 3
1/2 in.
89 mm / 3.5 in. 6.3 mm / 0.250 in. From 228 mm / 9 in. to 431 mm / 17 in. 9.5 mm / 0.375 in.
From 482 mm / 19 in. to 787 mm / 31 in. 12.7 mm / 0.500 in.
Pile 4
1/2 in.
114 mm / 4.5 in. 6.3 mm / 0.250 in. From 228 mm / 9 in. to 431 mm / 17 in. 9.5 mm / 0.375 in.
From 482 mm / 19 in. to 787 mm / 31 in. 12.7 mm / 0.500 in.
Pile 5
9/16 in.
141 mm / 5.5625 in. 6.3 mm / 0.250 in. From 333 mm / 13 in. to 431 mm / 17 in. 9.5 mm / 0.375 in.
From 482 mm / 19 in. to 787 mm / 31 in. 12.7 mm / 0.500 in.
Pile 5
9/16 in.
141 mm / 5.5625 in. 9.5 mm / 0.375 in. From 333 mm / 13 in. to 431 mm / 17 in. 9.5 mm / 0.375 in.
From 482 mm / 19 in. to 787 mm / 31 in. 12.7 mm / 0.500 in.
Pile 6
5/8 in.
168 mm / 6.625 in. 6.3 mm / 0.250 in. From 381 mm / 15 in. to 431 mm / 17 in. 9.5 mm / 0.375 in.
From 482 mm / 19 in. to 787 mm / 31 in. 12.7 mm / 0.500 in.
Pile 6
5/8 in.
168 mm / 6.625 in. 9.5 mm / 0.375 in. From 381 mm / 15 in. to 431 mm / 17 in. 9.5 mm / 0.375 in.
From 482 mm / 19 in. to 787 mm / 31 in. 12.7 mm / 0.500 in.
Pile 8
5/8 in.
219 mm / 8.625 in. 6.3 mm / 0.250 in. 431 mm / 17 in. 9.5 mm / 0.375 in.
From 482 mm / 19 in. to 787 mm / 31 in. 12.7 mm / 0.500 in.
Pile 8
5/8 in.
219 mm / 8.625 in. 9.5 mm / 0.375 in. 431 mm / 17 in. 9.5 mm / 0.375 in.
From 482 mm / 19 in. to 787 mm / 31 in. 12.7 mm / 0.500 in. 
Pile 10
3/4 in.
273 mm / 10.75 in. 6.3 mm / 0.250 in. 431 mm / 17 in. 9.5 mm / 0.375 in.
From 482 mm / 19 in. to 990 mm / 39 in. 12.7 mm / 0.500 in.
Pile 10
3/4 in.
273 mm / 10.75 in. 9.5 mm / 0.375 in. 431 mm / 17 in. 9.5 mm / 0.375 in.
From 482 mm / 19 in. to 990 mm / 39 in. 12.7 mm / 0.500 in.
Pile 12
3/4 in.
324 mm / 12.75 in. 6.3 mm / 0.250 in. From 533 mm / 21 in. to 990 mm / 39 in. 12.7 mm / 0.500 in.
Pile 12
3/4 in.
324 mm / 12.75 in. 9.5 mm / 0.375 in. From 533 mm / 21 in. to 990 mm / 39 in. 12.7 mm / 0.500 in.

 

Figure 1 below shows a typical steel pile with a single helical blade.

GoliathTech Inc. pile drawing
Figure 1. GoliathTech Inc.
  1. Tube
  2. Helical blade

Manufacturing plant

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

  • Magog, Québec, 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 Report.
  • When the product is installed in granular soil or silt, there is a direct relationship between the applied torque and the allowable compressive and tensile loads. The Allowable compressive and tensile loads for the proposed auger-installed pile in granular soil or silt table indicates the allowable compressive and tensile loads as a function of the applied torque.
  • When the auger-installed steel pile is installed with granular material that exceeds 200 mm in diameter, the relationship between the applied torque and the allowable compressive and tensile loads is not as predictable. When it is installed in such soils, the allowable compressive and tensile loads have to be confirmed by on-site load tests. These load tests are also required if the allowable loads need to be greater than those stated in the Allowable compressive and tensile loads for the proposed auger-installed pile in granular soil or silt table and the Allowable compressive and tensile loads for the proposed auger-installed pile in cohesive soil table. The tests need to be conducted under the direct supervision of a professional geotechnical engineer, skilled in such design and licensed to practise under the appropriate provincial or territorial legislation.
  • In all cases, a registered professional engineer skilled in such design and licensed to practise under the appropriate provincial or territorial legislation must determine the number and spacing of the auger-installed steel piles required to carry all the loads. A certificate attesting to the conformity of the installation and the allowable loads for the piles must be provided.
  • The installation of the auger-installed steel pile must be carried out as per the manufacturer’s instructions. The anchors must be screwed into the ground to below the frost line using mechanized equipment. The anchor is rotated into the ground with sufficient applied downward pressure (crowd) to advance the anchor one pitch distance per revolution. The anchor 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). Helical anchors are rapidly installed in a wide variety of soil formations using a variety of readily available equipment. They are immediately ready for loading after installation.
  • 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 practise under the appropriate provincial or territorial legislation. If the determination of the presence of corrosive conditions is not completed before installation, the product, including all its accessories, is required to be hot-dipped galvanized, meeting the requirements of CAN/CSA-G164 (ASTM A123/A123M-17) with a minimum thickness of 610 g/m2, or another method that provides an equivalent level of protection and abrasion resistance deemed acceptable by the CCMC.
  • The installer of the proposed auger-installed steel piles must be certified by GoliathTech Inc. Using approved equipment, the installer must follow the manufacturer’s installation instructions and the uses and limitations specified in this Report. Each installer must carry a certification card bearing their signature and photograph.
  • Each auger-installed steel pile must be identified with a label containing the manufacturer’s identification and “CCMC 13675-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

Performance requirements

The proposed auger-installed steel piles were tested to:

  • ASTM D 1143/D 1143M-07(2013), “Standard Test Methods for Deep Foundations Under Static Axial Compressive Load,”
  • ASTM D 3689/D 3689M-07(2013) e1, “Standard Test Methods for Deep Foundations Under Static Axial Tensile Load,” and

Testing was conducted at various sites that included granular and cohesive soils. A series of 51 tests were performed. The intent of the testing was to determine a correlation between the torque applied during installation and the allowable loads.

  • In the granular and silt-based soil there was a good correlation between the torque applied during installation and the allowable loads. For the compressive loads noted in the table below, the factor of safety varied from 2.0 to 3.0. For the tensile loads, the factor of safety varied from 2.0 to 2.7. 
  • In the cohesive soil there was a good correlation between the torque applied during installation and the allowable loads. A factor of safety of 2.0 was used.
  • For lateral loads in each soil condition, no correlation was possible.
Table 2. Allowable compressive and tensile loads for the proposed auger-installed pile in granular soil or siltTable footnote footnote (1)
Applied torque Allowable load
Compression Tension
N⋅m (lbf⋅ft.) kN (lb) kN (lb)
678 500 20 4 500 12 2 700
1 017 750 23 5 175 15 3 375
1 356 1 000 27 6 075 18 4 050
1 695 1 250 30 6 750 20 4 500
2 034 1 500 33 7 425 23 5 175
2 373 1 750 37 8 325 26 5 850
2 712 2 000 40 9 000 29 6 252
3 051 2 250 44 9 900 32 7 200
3 390 2 500 47 10 575 34 7 650
3 728 2 750 51 11 475 37 8 325
4 067 3 000 54 12 150 40 9 000
4 406 3 250 57 12 825 42 9 450
4 745 3 500 61 13 725 45 10 125
5 084 3 750 64 14 400 48 10 800
5 423 4 000 68 15 300 51 11 475
5 762 4 250 71 15 975 54 12 150
6 101 4 500 74 16 650 57 12 825
6 440 4 750 78 17 550 59 13 275
6 779 5 000 81 18 225 62 13 950
5 457  5 500 88 19 800 67 15 075
8 135 6 000 95 21 375 72 16 200

 

Table 3. Allowable compressive and tensile loads for the proposed auger-installed pile in cohesive soilTable footnote footnote (1)
Applied torque Allowable load
Compression Tension
N⋅m (lbf⋅ft.) kN (lb) kN (lb)
1 017 750 7 1 574 3 674
1 356 1 000 10 2 248 5 1 124
1 695 1 250 13 2 922 8 1 798
2 034 1 500 16 3 579 11 2 473
2 373 1 750 20 4 496 14 3 147
2 712 2 000 23 5 171 16 3 597
3 051 2 250 26 5 845 19 4 271
3 390 2 500 29 6 519 22 4 946
3 728 2 750 33 7 419 24 5 395
4 067 3 000 36 8 093 27 6 070
4 406 3 250 39 8 767 30 6 744
4 745 3 500 42 9 442 33 7 419
5 084 3 750 45 10 116 35 7 868
5 423 4 000 49 11 015 38 8 543
5 762 4 250 52 11 690 41 9 217
6 101 4 500 55 12 364 44 9 891

 

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.

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© 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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