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[CCMC 14027-R] CCMC Canadian code compliance evaluation

From: National Research Council Canada

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Compliance opinion

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

National Building Code of Canada 2015

ID Code provision Solution type
04-02-03-08-00-0-004.2.3.8. Steel PilesAcceptable
04-02-03-08-00-0-004.2.3.8. Steel PilesAlternative
04-02-03-10-00-0-004.2.3.10.(1) Where conditions are corrosive to steel, ...Acceptable
04-02-04-01-00-0-004.2.4.1.(1) The design of foundations, excavations a ...Acceptable
09-04-01-01-01-c-019.4.1.1.(1)(c)(i) Part 9, orAcceptable

The above opinion(s) is/are 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

Roterra Helical Screw Piling

Product description

The product is constructed of a helical blade welded to a steel shaft with drive holes and a leading edge cut to a 45° angle. The helical blade is formed to an engineered geometry.

This Evaluation Report covers four pile types:

Pile code Shaft Wall thickness Helix A Helix B Helix spacing
Type 1 73 mm 5.5 mm 9.5 mm × 305 mm n/a n/a
Type 2 89 mm 6.4 mm 12.7 mm × 356 mm n/a n/a
Type 3 114 mm 6.3 mm 12.7 mm × 406 mm n/a n/a
Type 4 114 mm 6.3 mm 12.7 mm × 406 mm 12.7 mm × 406 mm 1 219 mm

 

The pile type is selected based on load requirements, soil conditions, and installation capabilities. The pile must be installed continuously without interruption until it meets the required installation torque.

Piling is available with accessories such as caps, support plates, and extension. Pipe shaft material must conform, be equivalent to, or exceed the requirements of ASTM A 252, “Standard Specification for Welded and Seamless Steel Pipe Piles,” grade 2 or 3. The steel blades and plates must conform, be equivalent to, or exceed CSA G40.21, “Structural Quality Steel”, Type 44w or ASTM A 36/A 36M, “Standard Specification for Carbon Structural Steel.” If required, piles can be hot dip galvanized in compliance with ASTM A 123/A 123M, “Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products” and ASTM A 153/A 153M, “Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware.”

The following figure shows a typical steel pile with two helix sizes.

Illustration of Roterra Helical Screw Piling.
Figure 1. Roterra Helical Screw Piling
  1. Shaft
  2. Helix B
  3. Helix A
  4. Screw pile (NTS)
  5. Helix spacing

Manufacturing plant

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

Product nameManufacturing plant
Acheson, AB, CA
Roterra Helical Screw PilingProduct evaluated by the CCMC

Product evaluated by the CCMC Indicates that the product from this manufacturing facility has been evaluated by the CCMC

  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; and
    • Accessory buildings such as sheds, gazebos, sunrooms, carports, decks or porches within the scope of Part 9 of NBC 2015.

    Other applications are beyond the scope of this evaluation, and a professional 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.

  • When the product is installed as a deep helical foundation system in undisturbed soil, such as granular soil, silt, and some clays, there is a direct relationship between the applied torque and the allowable compressive and tensile loads. The following tables indicate the allowable compressive and tensile loads as a function of the applied torque:
  • When the auger-installed steel pile is installed in disturbed or sensitive soil, such as uncontrolled fill and sensitive clays, the relationship between the applied torque and the allowable compressive and tensile loads is not as predictable as when the steel pile is installed in undisturbed soil. When it is installed in disturbed or sensitive soils, the allowable compressive and tensile loads must 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 tables under the Technical information section.
  • The tests must 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 structural 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.
  • The installation of the auger-installed steel pile must be carried out in accordance with the manufacturer’s instructions. The anchors must be screwed into the ground using mechanized equipment. The anchor must be rotated into the ground with sufficient applied downward pressure (crowd) to advance the anchor one pitch distance per revolution. The anchor must be advanced until the applied torque value attains a specified value. Extensions must be added to the central shaft as needed. The applied loads may be tensile (uplift), compressive (bearing), or a combination thereof. Helical anchors can be installed quickly in a wide variety of soil formations using a variety of readily available equipment. They are ready for loading immediately after installation.
  • In the 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 practise 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 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, “Hot Dip Galvanizing of Irregularly Shaped Articles” (ASTM A 123/A 123M-17), with a minimum thickness of 610 g/m2, or treated by another method that provides an equivalent level of protection and abrasion resistance deemed acceptable by the CCMC.
  • Installers of the auger-installed steel piles must be certified by Roterra Piling Ltd. Using approved equipment, the installer must follow the manufacturer’s installation instructions and the conditions and limitations specified in this Report. Each installer must carry a certification card bearing his or her signature.
  • Each proposed auger-installed steel pile must be identified with a label containing the following information:
    • the manufacturer’s identification; and
    • the phrase “CCMC 14027-R.”
  • The product may be used as 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 Report.

  Technical information

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

Evaluation requirements
Criteria number Criteria name
CCMC-TG-316615.13-15DCCMC Technical Guide for Augered-Installed Steel Piles

General

The product was tested to:

  • ASTM D 1143/D 1143M-07e1, “Deep Foundations Under Static Axial Compressive Load” and
  • ASTM D 3689-90, “Standard Test Method for Individual Piles Under Static Axial Tensile Load.”

A series of tests were conducted at three different sites of various soils ranging from sandy, medium-stiff clay, to very-stiff clay to determine if there is a correlation between the torque applied during installation and the allowable compressive and tensile loads; the results confirmed that there is a correlation. For the compressive and tension loads noted in the tables below, the factor of safety is 2.

Table 1. Type 1 helix allowable loads for the product in cohesive and cohesionless soils
Applied torque Allowable loads
Compression Tension
N·m ft.·lb kN lb kN lb
678 500 8.0 1 791 7.8 1 752
1 356 1 000 15.9 3 581 15.6 3 505
2 034 1 500 23.9 5 372 23.4 5 257
2 712 2 000 31.9 7 162 31.2 7 010
3 390 2 500 39.8 8 953 39.0 8 762
4 067 3 000 47.8 10 744 46.8 10 514
4 745 3 500 55.8 12 534 54.6 12 267
5 423 4 000 63.7 14 325 - -
6 101 4 500 71.7 16 115 - -
6 779 5 000 79.7 17 906 - -
7 457 5 500 87.6 19 697 - -
8 135 6 000 95.6 21 487 - -

 

Table 2. Type 2 helix allowable loads for the product in cohesive and cohesionless soils
Applied torque Allowable loads
Compression Tension
N·m ft.·lb kN lb kN lb
678 500 7.8 1 763 5.7 1 271
1 356 1 000 15.7 3 525 11.3 2 543
2 034 1 500 23.5 5 288 17.0 3 814
2 712 2 000 31.4 7 050 22.6 5 085
3 390 2 500 39.2 8 813 28.3 6 356
4 067 3 000 47.0 10 575 33.9 7 628
4 745 3 500 54.9 12 338 39.6 8 899
5 423 4 000 62.7 14 100 45.2 10 170
6 101 4 500 70.6 15 863 50.9 11 442
6 779 5 000 78.4 17 625 56.6 12 713
7 457 5 500 86.2 19 388 - -
8 135 6 000 94.1 21 150 - -

 

Table 3. Type 3 helix allowable loads for the product in cohesive and cohesionless soils
Applied torque Allowable loads
Compression Tension
N·m ft.·lb kN lb kN lb
678 500 6.5 1 472 5.8 1 312
1 356 1 000 13.1 2 944 11.7 2 625
2 034 1 500 19.6 4 416 17.5 3 937
2 712 2 000 26.2 5 888 23.4 5 249
3 390 2 500 32.7 7 360 29.2 6 562
4 067 3 000 39.3 8 832 35.0 7 874
4 745 3 500 45.8 10 304 40.9 9 186
5 423 4 000 52.4 11 775 46.7 10 499
6 101 4 500 57.7 12 968 52.5 11 811
6 779 5 000 62.2 13 975 58.4 13 123
7 457 5 500 66.6 14 981 - -
8 135 6 000 71.1 15 988 - -
8 813 6 500 75.6 16 995 - -
9 491 7 000 80.1 18 001 - -
10 169 7 500 84.6 19 008 - -
10 846 8 000 89.0 20 014 - -
11 524 8 500 93.5 21 021 - -
12 202 9 000 98.0 22 027 - -

 

Table 4. Type 4 helix allowable loads for the product in cohesive and cohesionless soils
Applied torque Allowable loads
Compression Tension
N·m ft.·lb kN lb kN lb
678 500 6.0 1 345 6.8 1 527
1 356 1 000 12.0 2 690 13.6 3 054
2 034 1 500 17.9 4 035 20.4 4 581
2 712 2 000 23.9 5 380 27.2 6 108
3 390 2 500 29.9 6 725 34.0 7 635
4 067 3 000 35.9 8 070 40.8 9 162
4 745 3 500 41.9 9 414 47.5 10 689
5 423 4 000 47.9 10 759 54.3 12 216
6 101 4 500 53.8 12 104 - -
6 779 5 000 59.8 13 449 - -
7 457 5 500 65.8 14 794 - -
8 135 6 000 71.8 16 139 - -
8 813 6 500 77.8 17 484 - -
9 491 7 000 82.9 18 637 - -
10 169 7 500 86.3 19 409 - -
10 846 8 000 89.8 20 181 - -
11 524 8 500 93.2 20 952 - -
12 202 9 000 96.6 21 724 - -
12 880 9 500 100.1 22 496 -  

Administrative information

Use of Canadian Construction Materials Centre (CCMC) assessments

This assessment must be read in the context of the entire CCMC Registry of Product Assessments, any applicable building code or by-law requirements, and/or any other regulatory requirements (for example, the Canada Consumer Product Safety Act, the Canadian Environmental Protection Act, etc.).

It is the responsibility of the user to confirm that the assessment they are using is current and has not been withdrawn or superseded by a later version on the CCMC Registry of Product Assessments.

Disclaimer

The National Research Council of Canada (NRC) has evaluated only the characteristics of the specific product described 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 (such as authorities having jurisdiction, design professionals and specifiers). This evaluation is valid when the product is used as part of permitted construction, respecting all conditions and limitations stated in the evaluation, and in accordance with applicable building codes and by-laws.

This evaluation is provided without representation, warranty or guarantee of any kind, expressed or implied, and the NRC provides no endorsement for any evaluated product. The NRC accepts no responsibility whatsoever arising in any way from any and all use of or reliance on the information contained herein or the use of any evaluated product. 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

Une version française de ce document est disponible.
In the case of any discrepancy between the English and French version of this document, the English version shall prevail.

Copyright

© His Majesty the King in Right of Canada, as represented by the National Research Council of Canada, 2023

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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Code compliance as an acceptable solution

Code Compliance via Acceptable Solutions

If a building design (e.g. material, component, assembly or system) can be shown to meet all provisions of the applicable acceptable solutions in Division B (e.g. it complies with the applicable provisions of a referenced standard), it is deemed to have satisfied the objectives and functional statements linked to those provisions and thus to have complied with that part of the Code.

National Building Code of Canada, Sentence A-1.2.1.1.(1)(a)

The CCMC has determined that compliance with this provision of the Code has been demonstrated as an Acceptable Solution. The evaluation report provides a summary of the basis of CCMC's compliance opinion.

CCMC's code compliance opinions

All CCMC evaluation reports are opinions of code compliance established in accordance with the National Building Code of Canada, Subsection 1.2.1. "Compliance with this Code," which requires compliance to be achieved by:

  • complying with the applicable acceptable solutions in Division B, or
  • using an alternative solution that will achieve at least the minimum level of performance required by Division B in the areas defined by the objective and functional statements attributed to the applicable acceptable solutions.

The CCMC assesses compliance with Canadian building, energy and safety codes, and is trusted by over 6,000 regulators across Canada.

Code compliance as an alternative solution

Code Compliance via Alternative Solutions

Where a design differs from the acceptable solutions in Division B, then it should be treated as an "alternative solution." A proponent of an alternative solution must demonstrate that the alternative solution addresses the same issues as the applicable acceptable solutions in Division B and their attributed objectives and functional statements. However, because the objectives and functional statements are entirely qualitative, demonstrating compliance with them in isolation is not possible. Therefore, Clause 1.2.1.1.(1)(b) identifies the principle that Division B establishes the quantitative performance targets that alternative solutions must meet. In many cases, these targets are not defined very precisely by the acceptable solutions [...] Nevertheless, Clause 1.2.1.1.(1)(b) makes it clear that an effort must be made to demonstrate that an alternative solution will perform as well as a design that would satisfy the applicable acceptable solutions in Division B—not “well enough” but “as well as.”

National Building Code of Canada, Sentence A-1.2.1.1.(1)(b)

The CCMC has determined that compliance with this provision of the Code has been demonstrated as an Alternative Solution. The evaluation report provides a summary of the basis of CCMC's compliance opinion.

CCMC's code compliance opinions

All CCMC evaluation reports are opinions of code compliance established in accordance with the National Building Code of Canada, Subsection 1.2.1. "Compliance with this Code," which requires compliance to be achieved by:

  • complying with the applicable acceptable solutions in Division B, or
  • using an alternative solution that will achieve at least the minimum level of performance required by Division B in the areas defined by the objective and functional statements attributed to the applicable acceptable solutions.

The CCMC assesses compliance with Canadian building, energy and safety codes, and is trusted by over 6,000 regulators across Canada.

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