[CCMC evaluation requirements] CAN/CGSB-7.2-94, Type 1

From: National Research Council Canada

This document provides a summary of the minimum requirements imposed by the Canadian Construction Materials Centre (CCMC) for all evaluations based on the below criteria document. Additional requirements may be imposed by the CCMC when necessary for a particular evaluation, and are detailed in the individual evaluation.

Criteria document

Scope

These evaluations apply to adjustable steel columns where the imposed load does not exceed 36 kN, per Sentence 9.17.3.4.(1), Design of Steel Columns, of Division B of the National Building Code (NBC) of Canada 2015, for Part 9, Housing and Small Buildings. The application scope for such installations is outlined in Article 9.17.1.1., Application (Columns), of Division B of the NBC 2015. Per Sentence 9.17.3.4.(2), Design of Steel Columns, of Division B of the NBC 2015, for loads higher than 36 kN, the column must be designed in accordance with Part 4, Structural Design, of Division B of the NBC 2015 by a professional engineer.

The standard covers the following column designs:

  • Type 1 – a telescopic double tube with an adjustable screw and a support pin; or
  • Type 2 – a single tube with an adjustable screw.

 

Material requirements

The evaluation holder must demonstrate that the product meets the following requirements (additional requirements may be imposed by the CCMC when necessary, and are detailed in the individual evaluation):

Materials

  • Column tubes shall be made from new steel, free from cracks and flaws.
  • The grade and yield strength of the steel shall be specified.

Load capacity

  • The allowable working load capacity determined through testing shall be at least 36 kN with a safety factor of 2.25.

Testing

  • Sampling, testing, acceptance criteria and determination of allowable working load capacity shall be in accordance with CAN/CGSB-7.2-94.


© Canadian General Standards Board. This standard is withdrawn by CGSB due to limited use and support for their revision. Therefore, the information contained therein may no longer represent the most current, reliable, and/or available information on these subjects. CGSB hereby disclaims any and all claims, representation or warranty.

Installation requirements

The CCMC requires that evaluation holders provide instructions for the installation of the product(s) that:

Manufacturing requirements

The CCMC requires that evaluation holders, at a minimum, demonstrate that the associated production process:

Dimensions and fabrication

  • The minimum outside diameter of a single tube column must be 63 mm.
  • The minimum tube wall thickness shall be 2.54 mm.
  • For a telescopic double tube column:
    • The minimum outside diameter of the inner tube shall be 63 mm and that of the outer tube must be 70 mm.
    • The outside diameter of the columns shall not be greater than 89 mm to permit their use in 51 mm × 100-mm frame-constructed walls (plane-finished dimension).
    • The last adjustment hole in the inner tube shall not be less than 108 mm from the end of the tube to provide at least 108 mm overlap with the outer tube when the column is fully extended.
    • The maximum clearance between inner and outer tubes shall be 1.8 mm.
  • Columns shall be fitted with steel bearing plates on the top and bottom. The top and bottom bearing plates shall not be less than 89 mm × 152 mm with a thickness of 6.4 ± 0.2 mm. However, bearing plates not less than 100 mm x 100 mm x 6.35 mm thick are permitted in accordance with Article 9.17.3.2 of NBC 2015, provided that the top plate shall extend across the full width of the beam where the column supports a wooden beam.

Coating

  • Column tubes and bearing plates shall be primed with a coat of rust-inhibiting (anti-corrosive) paint on the outside surface.
  • Coating dry film thickness shall be a minimum of 0.038 mm and a maximum of 0.076 mm.

Labelling requirements

The CCMC requires that evaluation holders ensure that product labels:

In addition, each column must be labelled with the following information:

  • manufacturer's name and address
  • standard number: CAN/CGSB-7.2.94
  • maximum extension
  • maximum allowable load: 36 kN; and
  • grade and yield strangth of steel.

The CCMC requires that the maximum allowable load found on the label be indicated as 36 kN per Sentence 9.17.3.4.(1) of  Division B of the NBC 2015. The CCMC evaluation number must also be indicated on the label alongside the statement that “The CCMC evaluation is only applicable for imposed loads not exceeding 36 kN per NBC 2015.”

Published CCMC evaluations

The following products have been evaluated to these requirements by the CCMC:

CCMC number:Manufacturer:Product names:
11170-LQuali-T-Fab Division de Quali-T-Groupe ULC Quali-T-Fab – Model 2436, Quali-T-Fab – Model 3050, Quali-T-Fab – Model 5080, Quali-T-Fab – Model 6090

Code references

National Building Code of Canada 2015

Code references Code provision
9.17.1.1.Application
9.17.3.4.(1)Where the imposed load does not exceed 3 ...
A-9.17.3.4.Design of Steel Columns
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