[CCMC 13006-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 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

Code provision Solution type
4.3.1.1. Design Basis for WoodAcceptable
9.23.4.2.(3) Spans for built-up wood and glued-lamina ...Alternative

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:

Pacific Woodtech LVL

Product description

Pacific Woodtech LVL (see Figure 1) is manufactured by laminating Douglas fir veneer sheets coated with a phenolic adhesive in specific lay-up patterns in a continuous press with all grain oriented parallel to the length of the member. The ends of the veneer sheets are either butt- or scarf-cut according to the requirements of the lay-up pattern, then lapped. The lay-up patterns and adhesives used are as specified in Pacific Woodtech Corporation’s “Quality Control Manual for Laminated Veneer Lumber.”

The product is available in thicknesses ranging from 19 mm to 178 mm, depths from 44 mm to 1 219 mm, and lengths up to 20.3 m. Products with a thickness greater than 89 mm are fabricated by means of a secondary face-bonding process.

The phenol-formaldehyde (PF) adhesive used in the manufacture of this LVL complies with CSA O112.6-M1977, “Phenol and Phenol- Resorcinol Resin Adhesives for Wood (High-Temperature Curing).” A phenol resorcinol formaldehyde (PRF) adhesive (Momentive 4001/ 5830 hardener), used in the secondary face-bonding process at a certified laminating plant, conforms to CSA O112.9-10, “Adhesives for Structural Wood Products (Exterior Exposure).” LT75/FM260 PRF adhesive, used in the secondary face-bonding process when face-bonded at another certified laminating plant, conforms to CSA O112.7-1960, “Resorcinol and Phenol-Resorcinol Resin Adhesives for Wood (Room- and Intermediate-Temperature Curing).”

 
Isometric profile drawing of the laminated veneer lumber (LVL) showing the exterior surface and the layers that compose the LVL.
Figure 1. Pacific Woodtech LVL

Manufacturing plant

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

  • Burlington, Washington, United States

  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, 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 are presented for Pacific Woodtech LVL to be designed by professional engineers in accordance with CSA O86-14 (Update No. 1), “Engineering Design in Wood,” 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.

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

Pacific Woodtech Corporation pre-engineered tablesFootnote (2)

When Pacific Woodtech LVL is used as floor beams or headers in simple spans supporting uniform loads only, or as columns, the installation shall be in accordance with the Pacific Woodtech Corporation publication entitled “PWLVL Headers & Beams - Limit States Design User’s Guide,” dated 19 June 2017.

The product shall be installed in accordance with Pacific Woodtech Corporation’s installation guidelines as noted in these documents for those applications falling within the scope of the documents. Applications outside the scope of these installation guidelines shall require engineering on a case-by-case basis.

Pacific Woodtech Corporation’s installation details

In the attachment of Pacific Woodtech LVL, nails and bolts shall be used and installed in accordance with the manufacturer’s size and spacing specifications.

The ends of all Pacific Woodtech LVL beams shall be restrained to prevent rollover.

The compression edges of all Pacific Woodtech LVL beams shall be continuously laterally supported to prevent lateral displacement and rotation.

Engineering required

For structural applications beyond the scope/limitations of the above-referenced Pacific Woodtech Corporation publication, or when required by the AHJ, the drawings or related documents shall bear the authorized seal of a professional engineer skilled in wood design and licensed to practice under the appropriate provincial or territorial legislation.

Pacific Woodtech LVL shall be designed in accordance with the requirements of CSA O86-14 (Update No. 1) and Part 4 of Division B of the NBC 2015. The specified strengths and fastener limits for Pacific Woodtech LVL shall not exceed the values set forth in the tables in the Technical information section of this evaluation. The designer shall use the properties specified in the tables in the Technical information section of this evaluation in accordance with CSA O86-14 (Update No. 1).

The engineer shall design in accordance with CSA O86-14 (Update No. 1), and may use the “Engineering Guide for Wood Frame Construction,” published by the Canadian Wood Council, as a guide.

Engineering support provided by manufacturer

Pacific Woodtech Corporation provides engineering support and may be consulted using the contact information in the Evaluation holder section of this evaluation.

  Technical information

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

Evaluation requirements
Criteria number Criteria name
CCMC-TG-061710-15ACCMC Technical Guide for Structural Composite Lumber

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.

Design requirements

NBC 2015 compliance data for Pacific Woodtech LVL on which the CCMC based its Code compliance opinion:

Table 1. Specified strengths (limit states design) for Pacific Woodtech LVL (MPa)Table footnote footnote (1)
Mechanical properties Grade
2 250Fb-1.5E 2 750Fb-1.8E 3 100Fb-2.0E
Bending fb – joistTable footnote footnote (2) 28.7 35.0 39.5
fb – plankTable footnote footnote (3) 28.7 35.0 39.5
Tension parallel to grain, ftTable footnote footnote (4) 16.3 20.1 22.8
Compression parallel to grain, fc 21.5 27.0 30.3
Compression perpendicular to grain, fc parallel to the glue line (joist) 9.4 10.7 10.7
perpendicular to the glue line (plank) 8.1 8.1 8.1
Horizontal shear, fv perpendicular to the glue line (joist) 2.9 3.7 3.7
parallel to the glue line (plank) 1.8 1.8 1.8
Modulus of elasticity (MOE) MOE – joist 10 343 12 411 13 790
MOE – plank 10 343 12 411 13 790
Pacific Woodtech LVL fastener capacities
Fastener property Nail orientation or bolt size Load direction Specific gravity (SG) of equivalent species for design purposes
Nail withdrawal edge withdrawal Western hemlock, SG = 0.47
face withdrawal Douglas fir, SG = 0.50
Nail lateral capacity edge parallel to grain Douglas fir, SG = 0.50
perpendicular to grain
face parallel to grain
perpendicular to grain
Bolt bearing capacity 12.5 mm parallel to grain Douglas fir, SG = 0.50
perpendicular to grain
19.0 mm parallel to grain
perpendicular to grain


This evaluation is applicable only to Pacific Woodtech LVL labeled with the APA certification mark and the phrase “CCMC 13006-R” on each beam or header member.

The manufacturing quality assurance program has been adapted to include requirements specified in ASTM D 5456, “Standard Specification for Evaluation of Structural Composite Lumber Products,” and is verified by APA – The Engineered Wood Association as part of the product certification. The APA conducts monthly audits of the manufacturing plants and the quality assurance program.

Appendix

The design values obtained from testing to ASTM D 5456-14b as specified in CSA O86-14 (Update No. 1), “Engineering Design in Wood,” are summarized below. The manufacturer’s published pre-engineered beam and header spans were then designed in accordance with CSA O86-14 (Update No. 1).

Additional test information for Pacific Woodtech LVL
Property Test information
Bending Specimens were tested in edgewise and flatwise bending for qualification and for establishing volume effects. A non-parametric, 5% tolerance limit with 75% confidence level approach was used to determine the characteristic value. Qualification test data have been used to establish the applicable coefficient of variation, CVw, and the reliability normalization factor from CSA O86-14 was used to determine the specified strength.
Shear Specimens were tested edgewise and flatwise orientation. A non-parametric, 5% tolerance limit with 75% confidence level approach was used to determine the characteristic value. Qualification test data have been used to establish the applicable coefficient of variation, CVw, and the reliability normalization factor from CSA O86-14 was used to determine the specified strength.
Compression perpendicular to grain (edgewise) Specimens were tested edgewise and the average stress at a 1.0-mm deformation was determined. This value was multiplied by 1.09 to establish the specified strength.
Compression perpendicular to grain (flatwise) Specimens were tested flatwise and the lower of the average stress at 1.0-mm deformation or the average stress at the proportional limit was determined in accordance with ASTM D 5456-14b. This value was multiplied by 1.81 to establish the specified strength in accordance with CSA O86-14 Update No. 1.
Compression parallel to grain Specimens were tested and a non-parametric, 5% tolerance limit with 75% confidence level approach was used to determine the characteristic value. Qualification test data have been used to establish the applicable coefficient of variation, CVw, and the reliability normalization factor from CSA O86-14 was used to determine the specified strength.
Tension parallel to grain Specimens were tested in tension for qualification and to establish volume effects. A non-parametric, 5% tolerance limit with 75% confidence level approach was used to determine the characteristic value. Qualification test data have been used to establish the applicable coefficient of variation, CVw, and the reliability normalization factor from CSA O86-14 was used to determine the specified strength.
Nail withdrawal Nail withdrawal values were established following ASTM D1761-06, “Standard Test Methods for Mechanical Fasteners in Wood,” for an 8d common nail having a 31.75-mm penetration. Twenty specimens were tested and the equivalent specific gravity along with the equivalent species combination was determined in accordance with ASTM D 5456-01, A2.
Nail bearing Dowel bearing strength was determined as per ASTM D 5764-95, “Standard Test Method for Evaluating Dowel-Bearing Strength of Wood and Wood-Based Products,” with 10d common nails with a nominal diameter of 3.76 mm and a lead hole diameter of 2.77 mm. Forty specimens (10 specimens for four combinations of load direction) of each LVL were tested and the mean bearing capacity was used to establish the equivalent specific gravity and equivalent species combination as per ASTM D 5456-01, A2.
Bolt bearing Bolt bearing capacity as per ASTM D 5764-95 with 12.5-mm and 19.0-mm bolts was determined. Twenty specimens (10 specimens for two combinations) of each LVL were tested and the mean bolt bearing capacity was used to establish the equivalent specific gravity and equivalent species combination as per ASTM D 5456-01, A2.
Creep and recovery Thirty specimens of “Pacific Woodtech LVL” were tested within a three-month creep and recovery test program, resulting in acceptable performance demonstrating equivalency to duration of load behavior of lumber.
Adhesive The phenol-formaldehyde adhesive used in the manufacture of this LVL complies with CSA O112.6-M1977, “Phenol and Phenol-Resorcinol Resin Adhesives for Wood (High-Temperature Curing).” See CCMC 13019-L. A phenol resorcinol formaldehyde adhesive (Momentive 4001 / 5830 hardener), used in the secondary face-bonding process when face-bonded at a certified laminating plant, conforms to CSA O112.9-10, “Adhesives for Structural Wood Products (Exterior Exposure).” See CCMC 13522-L. LT75/FM260 phenolic resorcinol formaldehyde adhesive, used in the secondary face-bonding process when face-bonded at another certified laminating plant, conforms to CSA O112.7-1960, “Resorcinol and Phenol-Resorcinol Resin Adhesives for Wood (Room- and Intermediate-Temperature Curing).”
Bond quality The bond quality was evaluated in accordance with Section 6.7.2 of ASTM D 5456-10a based on longitudinal shear (block shear) tests per Section 14 of ASTM D 143. The test results confirmed the longitudinal (flatwise) shear design value of 2350Fb-1.9E and evaluated the percentage of wood failure. The average percentage of wood failure tested was deemed to be acceptable (no less than 85%).
Product durability The product durability was evaluated in accordance with Section 6.8.1 of ASTM D 5456-10a based on the single vacuum-pressure-soak cycle edgewise bending tests. The test results indicated that the 3100Fb-2.0E LVL met the ASTM D 5456 edgewise bending durability requirement which requires the average strength retention to be at least 75%.

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.

Language

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Copyright

© 2022 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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