[CCMC 08675-R] CCMC Canadian code compliance evaluation

It is the opinion of the Canadian Construction Materials Centre that the evaluated product, when used as structural composite lumber (SCL) in accordance with the conditions and limitations stated in this evaluation, complies with the following code:

National Building Code of Canada 2015

Ontario Building Code

Ruling No. 05-20-144 (08675-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 2006-01-31 (revised 2012-06-13) 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(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 name

Microllam^® LVL

Product description

The product is manufactured by laminating veneer sheets of wood species or species combinations coated with an exterior-type adhesive conforming to CSA O112.6-M1977 (R2006), “Phenol and Phenol-Resorcinol Resin Adhesives for Wood (High-Temperature Curing),” and CSA O112.9-10, “Evaluation of Adhesives for Structural Wood Products (Exterior Exposure),” in specific lay-up patterns that are fed into a continuous press with all grain oriented parallel to the length of the member. The wood species, species combinations, lay-up patterns and adhesives used are as specified in the Weyerhaeuser “Microllam^® LVL Manufacturing Standards.”

The product is available in thicknesses ranging from 19 mm to 89 mm, widths ranging from 63.5 mm to 1 220 mm, and lengths up to 24.4 m.

The manufacturing quality assurance program and records are verified by PFS-TECO, Cottage Grove, WI, as part of the product certification.

Manufacturing plants

This evaluation is limited to products produced at the following plants:

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

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

• The product, as with all SCL, is intended for dry service applications only.^{Footnote (1)}
• The product is intended for use in construction as an alternative material to lumber. Proprietary design values presented for the product are to be used by professional engineers for design in accordance with CSA O86 for structural applications such as beams, headers, joists, rafters and columns as intended by the product manufacturer. The specific application must be qualified through specific testing and validated by the manufacturer. Applications such as I-joist flanges, studs and metal-plated truss chords are beyond the scope of this evaluation.
  1. Weyerhaeuser's pre-engineered tables^{Footnote (2)}

     The pre-engineered tables in the literature outlined below have been provided to the CCMC by the manufacturer to demonstrate compliance with Part 9 buildings for acceptance by the local authority having jurisdiction (AHJ).

     When the product is used to support uniform loads only, the installation must be in accordance with the tables and installation details published by Weyerhaeuser entitled:

     1. “Beams, Headers and Columns (TJ-9500) (Limit States Design for Eastern Canada),” dated May 2022, and
     2. “Beams, Headers and Columns (TJ-9505) (Limit States Design for Western Canada),” dated March 2020.
      

     Except where a floor is required to support a concentrated load or a specified unfactored live load in excess of 1.9 kN/m², and in lieu of engineering design, the spans for the product, when used as floor joists, rafters and beams, may conform to the spans for select structural grade for the Douglas Fir-Larch group in Tables 9.23.4.2.-A to 9.23.4.2.-I of the NBC 2015. Maximum deflections must conform to Subsection 9.4.3., Deflections, of Division B of the NBC 2015. Floor joists must be designed to meet the deflection and vibration criteria set in the NBC 2015 for lumber.

     The product must be installed in accordance with the manufacturer’s installation guidelines noted in the above-mentioned documents for those applications falling within the scope of the documents. Applications outside the scope of these installation guidelines require engineering on a case-by-case basis.

     Intertek Testing Services considers the product as an equivalent to lumber floor joists with respect to fire-resistance rating for equivalent member size and spacing within a rated floor assembly (see Intertek’s Directories of Certified Products).

  2. Weyerhaeuser's installation details

     The manufacturer’s pre-engineered details within the documents outlined above are limited in scope to building designs where the anticipated loads on the following structural details are not exceeded:

     • headers supporting floor and/or snow, pages 8–9 of (1) and pages 6–7 of (2);
     • beam connection details, pages 12–13 of (1) and pages 10-11 of (2);
     • built-up member connections, pages 16–18 of (1) and pages 14–16 of (2); and
     • allowable holes in beams, page 14 of (1) and page 12 of (2).
  3. Engineering required

     For structural applications beyond the scope/limitations of the above-referenced Weyerhaeuser publications, or when required by the AHJ, the drawings or related documents must bear the authorized seal of a professional engineer, or other certified authority approved by the AHJ, skilled in wood design and licensed to practise under the appropriate provincial or territorial legislation.

     Installations beyond the scope/limitations of (i) and (ii) above imply, but are not limited to, the following:

     • higher loads / longer spans than the manufacturer’s pre-engineered details;
     • concentrated loads;
     • areas of high wind or high seismicity;
     • design of supporting members/columns when the total beam/header load exceeds the NBC 2015 pre-engineered beam/lintel tables; and
     • design of supporting foundation footings when the total load exceeds the NBC 2015 pre-engineered floor/roof joist tables.

     The engineer must design in accordance with CSA O86, and may use as a guide the “Engineering Guide for Wood Frame Construction,” published by the Canadian Wood Council.

     The specified strengths for the product must not exceed the values set forth in Table 1. See Figure 1 for details about strand orientation.

     The ends of all beams must be restrained to prevent rollover. This is normally achieved by attaching a diaphragm sheathing to the top or to the compression edge, and to an end wall or shear transfer panel capable of transferring a minimum unfactored uniform load of 730 N/m or the required shear forces due to wind or seismic conditions. Blocking or crossbracing with equivalent strength may be used. For beams with maximum depth-to-width ratio no more than 6.5:1, the compression edges of the beams must be laterally supported at least every 610 mm. When the depth-to-width ratio exceeds 6.5:1, the compression edges of the beams must be continuously laterally supported throughout its length, except where design is done in accordance with CSA O86.

     Nailing of the product perpendicular to glue lines must conform to Table 9.23.3.4., Nailing for Framing, of Division B of the NBC 2015. Nails must be installed parallel to the glue lines on the narrow face (edge) of the product, that is at least 19 mm thick × 89 mm wide. The nails must be spaced at a minimum of 100 mm on centre (o.c.) for 63.5-mm common nails and 125 mm o.c. for 76-mm and 83-mm common nails and No. 14 gauge staples. 89-mm common nails installed parallel to the glue lines on the narrow face (edge) of product that is at least 38 mm thick × 89 mm wide must be spaced a minimum of 200 mm o.c.

  4. Engineering support provided by manufacturer

     Weyerhaeuser may provide engineering services in conjunction with Weyerhaeuser product specification and offers the following support contact number for their Canadian offices: 1-888-453-8358.

• Damaged or defective products must not be used, unless repaired in accordance with written instructions from the manufacturer.
• This product must be identified with the phrase “CCMC 08675-R” along the side of the product. This CCMC number is only valid when it appears in conjunction with the certification mark of PFS-TECO.

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

The evaluation 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.

The manufacturing quality assurance program has been updated to include requirements specified in ASTM D5456, “Evaluation of Structural Composite Lumber Products,” and has been verified by independent, third-party monitoring and inspection conducted by PFS-TECO as part of the product certification.

Note that RedBuilt™, LLC is the owner of the Stayton, OR plant. This plant manufactures the product for Weyerhaeuser according to Weyerhaeuser manufacturing standards.

Additional information

The design values obtained from testing to ASTM D5456-01, ASTM D5456-07 and ASTM D5456-14b as specified in CAN/CSA-O86- 01, CSA O86-09 and CSA O86-14 (Update No.1) respectively are summarized below.