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[CCMC 12839-R] CCMC Canadian code compliance evaluation

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Compliance opinion

It is the opinion of the Canadian Construction Materials Centre that the evaluated product, when used as used as a casting product for concrete-constructed tube footings in accordance with the conditions and limitations stated in this evaluation, complies with the following codes:

Ontario Building Code 2017

ID Code provision Solution type
9.15.3. FootingsAlternative

National Building Code of Canada 2015

ID Code provision Solution type
09-15-03-00-00-0-009.15.3. FootingsAlternative

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

Bigfoot Systems®

Product description

The product is an engineer-designed footing form made of lightweight recycled, partially recycled, or virgin high-density polyethylene plastic that replaces traditional wooden boxes. The product is bell shaped, which allows for standard fibre construction tubes to be attached to its top.

The product's footing forms come in four different models: BF20, BF24, BF28, and BF36.

  • Model BF20 accepts 15 cm (6 in.) and 20 cm (8 in.) small, medium, and large construction tubes.
  • Model BF24 accepts 20 cm (8 in.) and 25 cm (10 in.) small, medium, and large construction tubes.
  • Model BF28 accepts 25 cm (10 in.) and 30 cm (12 in.) small, medium, and large construction tubes.
  • Model BF36 accepts 30 cm (12 in.), 35 cm (14 in.), 40 cm (16 in.), and 45 cm (18 in.) construction tubes.

Figure 1 illustrates the shape of the product with generic dimensions. Table 1 provides specific dimensions for each model. The top rings of the bell form are designed to accept construction tubes with various inside diameters. The side portion is ribbed to give added strength to resist distortion of the form from the backfill or poured concrete and allows trapped air to escape. The sloped sides also have small vent holes to allow trapped air to escape when the footing is being poured with concrete to prevent honeycombing of the concrete inside the form.

 
Footing form of the product with dimension specifications of the overall height, ring heights and ring diameter with labels coordinating with the below table.
Figure 1. Footing form of the product
  1. 30 cm (12 in.) for BF20, BF24, and BF28; 35 cm (14 in.) for BF36
  2. All rings 2.8 cm (1.125 in.)
  3. Vents
  4. H1: overall height
  5. D1: outside diameter
Table 1.  Dimensions of the product
Ring diameter BF20
cm (in.)
BF24
cm (in.)
BF28
cm (in.)
BF36
cm (in.)
Ring height BF20
cm (in.)
BF24
cm (in.)
BF28
cm (in.)
BF36
cm (in.)
D1 13.97 (5.50) 19.05 (7.50) 24.13 (9.50) 30.48 (12.00) H1 45.72 (18.00) 47.63 (18.75) 47.63 (18.75) 58.42 (23.0)
D2 15.29 (6.02) 20.37 (8.02) 25.45 (10.02) 35.56 (14.00) H2 43.18 (17.00) 44.77 (17.625) 44.77 (17.625) 52.07 (20.5)
D3 16.46 (6.48) 21.39 (8.42) 26.47 (10.42) 40.64 (16.00) H3 40.64 (16.00) 41.91 (16.5) 41.91 (16.5) 45.72 (18.00)
D4 19.05 (7.50) 24.13 (9.50) 29.21 (11.50) 45.72 (18.00) H4 38.10 (15.00) 39.05 (15.375) 39.05 (15.375) 39.37 (15.5)
D5 20.37 (8.02) 25.45 (10.02) 30.53 (12.02) - H5 35.56 (14.00) 36.20 (14.25) 36.20 (14.25) -
D6 21.39 (8.42) 26.47 (10.42) 31.55 (12.42) - H6 33.02 (13.00) 33.34 (13.125) 33.34 (13.125) -
D7 54.61 (21.50) 64.01 (25.20) 75.18 (29.60) 92.42 (36.40) Wall thickness

0.1905-0.2667

(0.075-0.105)

0.1905-0.2667

(0.075-0.105)

0.2032-0.2667 

  (0.080-0.105)

0.3048-0.4064

(0.120-0.160)
D0 50.80 (20.00) 60.96 (24.00) 71.12 (28.00) 91.44 (36.00) - - - - -

Manufacturing plant

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

Product nameManufacturing plant
Springhill, NS, CA
Bigfoot Systems®Product 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 may be used as a casting for concrete footings in applications such as cottages, gazebos, storage sheds, sunrooms, screen rooms, additions, pole barns, carports, verandas, raised decks, gate posts, front porches, jack posts, fence posts, permanent and portable signs, wharves, moorings, capitals for columns, footings for mobile homes, satellite dishes, and telecommunication towers. The product can also be used as a funnel for pouring.
  • For applications beyond the scope of this report, footing size and spacing will have to be determined by a registered professional engineer skilled in such design and licensed to practice under the appropriate provincial or territorial legislation.
  • Excess rings should be cut off at the top of the ring being used and should be removed.
  • For below-grade applications, the product must be placed on undisturbed ground or on 100 mm to 150 mm of compacted crushed stone, then backfilled according to the suggested depth before the pouring of concrete in order to prevent the footing from rising when concrete is being poured.
  • For above-grade applications, the product must be anchored to the ground with 30 cm (12 in.) spikes driven in at a 45º angle. To accommodate the spikes, 10 mm holes must be drilled in the product on a 45º angle as indicated by the markings on the flange area at each rib location.
  • The construction tube must be screwed to the footing with four 25 mm (1 in.) screws, except for the BF36 model, which requires eight 25 mm (1 in.) screws.
  • The hole must be backfilled according to the suggested depths before concrete is poured.
  • For additional stability after the concrete has been poured, three to four #4 or #5 rebars may be placed in the centre of the construction tube down to the bottom of the footing form, ensuring not to strike the sides of the product.
  • Concrete must be designed, mixed, placed, cured, and tested in accordance with CSA A23.1-14, “Concrete Materials and Methods of Concrete Construction.” Concrete must have a minimum compressive strength of 20.7 MPa (3 000 psi) at 28 days and consist of not more than 19 mm aggregate. Concrete must be placed in 25 cm to 40 cm lifts (maximum 40.6 cm) with #4 or #5 rebars thrust 10 to 12 times per concrete lift. Rods should be in the centre and not around the perimeter. Stripping of the forms is not necessary with the proposed footing form.
  • The product must be installed according to the manufacturer's instructions.
  • For most applications, the product may be installed according to Table 2.
Table 2.  Allowable bearing pressures and loads for the Bigfoot Systems® tube
Soil type

Maximum allowable bearing pressure
lbf/ft.2(kPa)

Model BF20 allowable loads
lb. (kN)
Model BF24 allowable loads
lb. (kN)
Model BF28 allowable loads
lb. (kN)
Model BF36 allowable loads
lb. (kN)
Soft clay 835.42 (40.0) 1 822.59 (8.1) 2 624.54 (11.7) 3 572.29 (15.9) 5 905.21 (26.3)
Loose sand or gravel 1 044.27 (50.0) 2 278.24 (10.1) 3 280.67 (14.6) 4 465.36 (19.9) 7 381.51 (32.8)
Firm clay 1 566.41 (75.0) 3 417.37 (15.2) 4 921.01 (21.9) 6 698.04 (29.8) 11 072.26 (49.3)
Dense or compact silt 2 088.54 (100.0) 4 556.49 (20.3) 6 561.34 (29.2) 8 930.71 (39.7) 14 763.02 (65.7)
Dense or compact sand 3 132.81 (150.0) 6 834.73 (30.4) 9 842.01 (43.8) 13 396.07 (59.6) 22 144.53 (98.5)
Stiff clay 3 132.81 (150.0) 6 834.73 (30.4) 9 842.01 (43.8) 13 396.07 (59.6) 22 144.53 (98.5)
Till 4 177.08 (200.0) 9 112.97 (40.5) 13 122.68 (58.4) 17 861.43 (79.5) 29 526.04 (131.3)
Clay shake 6 265.62 (300.0) 13 669.46 (60.8) 19 684.02 (87.6) 26 792.14 (119.2) 44 289.06 (197.0)
Sound rock 10 442.70 (500.0) 22 782.44 (101.3) 32 806.71 (145.9) 44 653.57 (198.6) 73 815.09 (328.3)

 

  Technical information

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

Evaluation requirements
Criteria number Criteria name
CCMC-TG-031113.03-15CCMC Technical Guide for Bell Shaped Foundation Form

The report holder has submitted technical documentation for the CCMC's evaluation. Testing was conducted at laboratories recognized by the CCMC. The corresponding technical evidence for this product is summarized below.

Table 3. Results of testing the stability properties for the product
Test Requirement Result
Buoyancy The top of each construction tube must remain within 10 mm (both horizontally and vertically) of its original position. The top of the construction tube remained stationary during the test with no measurable movement.
Compression of unit walls after backfilling The sloping sides of the footing base must not be deformed by more than 10 mm after backfilling. The units completely filled with concrete and maintained their original shape. There was no appreciable change in dimensions.
Air pockets and honeycombing There must be no air pockets or honeycombing in any of the products tested. The concrete was well consolidated, with no voids or honeycombing.

 

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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From: National Research Council Canada

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