Evaluation Listing CCMC 13221-L
APA EWS Rim Board - Ainsworth

Table of Contents

Download this document in PDF format
Evaluation Issued:
2006-04-11
Re-evaluated:
2013-07-08
Revised:
Never
Re-evaluation due:
2015-04-11
Re-evaluation in progress
No


Preface: Masterformat 06 17 43.01, APA EWS Rim Board

Preface Issued:
2006-04-11

These Evaluation Listings apply to commodity-type oriented strandboard (OSB) rim boards used in engineered-wood joist floor assemblies. The rim boards are manufactured to meet an APA – The Engineered Wood AssociationFootnote 1 industry standard and are subject to the APA EWSFootnote 1 certification program. APA EWS is accredited by the Standards Council of Canada (SCC) as a certification agency for structural wood-based products.

Evaluation to Codes and Standards

Evaluation is conducted to the following industry standard:

  • APA PRR-401C, Performance Standard for APA EWS Rim Boards (Limit States Design), January 2005

Factored resistance values for limit states design values are produced in accordance with the principles of:

  • CAN/CSA-O86-01, "Engineering Design in Wood."

Adhesive binder and bond durability of the "APA EWS Rim Boards" is equivalent to the manufacturer's OSB panels complying with:

  • CAN/CSA-O325.0, "Construction Sheathing"

Product Description

The rim boards are an oriented strandboard (OSB) that is manufactured to serve as a rim board. The product is available in two grades, APA EWS Rim Board and Rim Board Plus, in thicknesses of 25 mm and up. The factored resistances of the APA EWS Rim Board and Rim Board Plus grades are outlined in Table 1. The nominal depths are available to match engineered wood I-joist depths of up to 610 mm.

Figures 1 and 2 show typical "APA EWS Rim Boards." The figures are for illustrative purposes only; please refer to the APA EWS installation guide (see end of this Preface) for more detailed information on the proper installation of the product.

Tables 1 and 2 outline the design values and basement window lintel spans for engineered buildings.

Figure 1
Figure 1. Typical OSB Rim Board
Figure 2
Figure 2. Typical Installation of "APA EWS Rim Board" (see the APA EWS manual)
Table 1. Factored Resistances for APA EWS Rim boards Used in Canada Table 1 footnote 1
Gradetmin2ΦH3
(kN/m)		ΦV4
(kN/m)		ΦZ5
(kN)		ΦP6
(kN)
Depth (d) Limitation (mm)
d ≤ 610d ≤ 406406 < d ≤ 610d ≤ 610d ≤ 610
Rim Board25 mm 3.4 80.3 40.2 2.2 26.0
28.6 mm 3.4 107.1 73.0 2.6 26.0
Rim Board Plus25 mm N/A7
28.6 mm 3.8 118.1 77.9 2.6 26.0
Notes to table 1
Footnote 1

All tabulated values are applicable to the standard-term load duration and permitted to be adjusted for other load durations in accordance with the applicable code.

Return to table 1 footnote 1 referrer

Footnote 2

tmin = Minimum thickness.

Return to table 1 footnote 2 referrer

Footnote 3

ΦH = Factored horizontal (shear) load transfer capacity is based on the nailing attachment schedule specified in:

  1. the NBC 2005 for the top of the rim board;
  2. the APA D340CA document for the bottom of the rim board (as no rim board to sill plate attachment is currently specified in the NBC), and
  3. the I-joist manufacturer's manual for the attachment to the I-joist.

Return to table 1 footnote 3 referrer

Footnote 4

ΦV = Factored uniform bearing (vertical) load capacity. The uniform bearing load shall be simultaneously satisfied with the concentrated vertical load capacity, when applicable.

Return to table 1 footnote 4 referrer

Footnote 5

ΦZ = Factored lateral resistance of a 12.7-mm-diameter lag screw.

Return to table 1 footnote 5 referrer

Footnote 6

ΦP = Factored concentrated vertical load capacity based on 114-mm bearing length. The concentrated vertical load shall be simultaneously satisfied with the uniform bearing load capacity, when applicable.

Return to table 1 footnote 6 referrer

Footnote 7

The minimum thickness of APA EWS Rim Board Plus is 28.6 mm.

Return to table 1 footnote 7 referrer

Imperial conversion: 1 kN/m = 68.52 plf; 1 kN = 224.81 lbf

Table 2. Pre-engineered Basement Opening Lintel Solutions for 28.6-mm (1 1/8") "APA EWS Rim Boards" — Rim board plies span over exterior foundation wall openings only with a maximum span of 1.2 m (4 ft.) Table 1.1 footnote 1 Table 1.1 footnote 2 Table 2 footnote 3
Lintel SupportingLintel Depth
(mm)		Number of plies of "APA EWS Rim Boards" RequiredMin. Bearing
(mm)
Specified Snow Load (kPa)
11.522.53
Roof including ceiling241 2 2 2 3 3 76
302 1 1 2 2 2
356 1 1 2 2 2
406 1 1 2 2 2
Roof and 1 floor241 2 3 3 3 4 114
302 2 2 2 2 3
356 1 2 2 2 2
406 1 2 2 2 2
Roof and 2 floors241 3 3 3 4 4 114
302 2 2 2 3 3
356 2 2 2 2 2
406 2 2 2 2 2
Roof and 3 floors241 3 4 4 4 4 114
302 2 3 3 3 3
356 2 2 2 2 2
406 2 2 2 2 2
Notes to table 2
Footnote 1

The engineering is based on edgewise bending properties given in APA D340CA, dated June 2004.

Return to table 2 footnote 1 referrer

Footnote 2

The lintel load calculations are based on the following assumptions:

  1. The lintel is uniformly loaded and subject to 'dry service conditions' only.
  2. The floor joists are face-mounted on the lintel with suitable hangers, and the floor sheathing is fastened to the top of the lintel at 150 mm on centre.
  3. The length of the supported members is as follows:
    • maximum roof truss span = 9.8 m
    • maximum floor joist span = 4.9 m
    • wall height = 2.5 m
  4. The assumed loading is as follows:
    • roof dead load = 0.5 kPa
    • floor dead load = 0.5 kPa
    • wall dead load = 0.5 kPa
    • floor live load = 1.9 kPa on the first floor; 1.4 kPa on upper floors
  5. Live load reduction factor (as per Canadian Wood Council Span Book) = 0.9 for roof plus 1 floor, 0.8 for roof plus 2 floors, 0.7 for roof plus 3 floors.
  6. The lintel is assumed to bear on an SPF sill plate on each side of the opening.
  7. Total load deflection is limited to span/600. Shear deflection has been included using G=E/6.

Return to table 2 footnote 2 referrer

Footnote 3

This Table applies to residential occupancies conforming to Part 9 of the NBC 2005.

Return to table 2 footnote 3 referrer

Usage and Limitations

The "APA EWS Rim Board" is intended for the following applications and limitations:

  • The "APA EWS Rim Board" is intended to be installed:
    • to transfer all vertical loads at the rim board location;
    • to provide diaphragm attachment (subfloor to the top edge of the rim board);
    • to transfer in-plane lateral loads from the diaphragm to the shear wall below;
    • to provide lateral support to the joist or rafter;
    • to provide closure at the ends of the joists or rafters;
    • to provide an attachment base for siding and/or exterior deck ledger;
    • to span basement window openings that are no greater than 1.2 m.
  • This product is intended to be installed in conjunction with engineered wood floor systems. The total factored loads on the "APA EWS Rim Board" shall not exceed the factored resistances of Table 1 (see APA technical support below).

    Further engineering for the framing design may be required when deemed necessary by the authority having jurisdiction. When the building design is beyond the scope of the manufacturer's above-mentioned literature (i.e. concrete topping, concrete roof tiles, high concentrated column loads, high wind and seismic areas, etc.), the installation shall be designed in accordance with Part 4 of the NBC 2005, and drawings or related documents shall bear the authorized seal of a professional engineer skilled in wood design who is licensed to practice under the appropriate provincial or territorial legislation;
  • A 15 ng/Pa·s·m2 vapour barrier must be installed on the interior side to address the requirements of Articles 9.25.1.2. and 9.25.4.2. of the NBC 2005;
  • "APA EWS Rim Boards" are intended for 'dry service' conditions, Footnote 2 as is the case for all wood-based composite wood products;
  • The rim boards must be stored and protected from moisture and weather at all times to prevent excessive weathering or deterioration of the wood components, as is the case for all wood-based joist products;

Engineering Support Provided by APA

APA - The Engineered Wood Association does provide engineering support for "APA EWS Rim Boards" and APA offers the following support contact numbers:

APA EWS
Telephone: 1-253-620-7400
E-mail: help@apawood.org

Identification

Each "APA EWS Rim Board" shall be suitably identified and show the following:

  • manufacturer's name;
  • APA EWS certification mark;
  • APA EWS Rim Board or Rim Board Plus identifier;
  • CCMC Evaluation Listing number.

Installation

The installation shall be in accordance with the APA EWS Data File, APA Performance Rated Rim Boards – Canadian Limit States Design for "APA EWS Rim Boards," dated June 2004.

Footnotes
Footnote 1

APA – The Engineered Wood Association has OSB and plywood manufacturers as members with an APA certification mark. Engineered Wood Systems (EWS) is a division of APA. EWS members produce glued laminated timber (glulam), structural composite lumber (SCL) and prefabricated wood I-joists. APA-EWS is their registered certification mark.

Return to footnote 1 referrer

Footnote 2

General Note: All lumber, wood-based panels and proprietary engineered wood products are intended for "dry service conditions." "Dry service" is defined as the in-service environment under which the equilibrium moisture content (M.C.) of lumber is 15% or less over a year and does not exceed 19% at any time. Wood contained within the interior of dry, heated or unheated buildings has generally been found to have a M.C. between 6% and 14% according to season and location. During construction, all wood-based products should be protected from the weather to ensure that the 19% M.C. is not exceeded in accordance with Article 9.3.2.5. of the NBC 2005.

Return to footnote 2 referrer

Evaluation Listing CCMC 13221-L: APA EWS Rim Board - Ainsworth

Evaluation Issued:
2006-04-11
Re-evaluated:
2013-07-08
Revised:
Never
Re-evaluation due:
2015-04-11
Re-evaluation in progress
No


1. Evaluation

The rim boards conform to ANSI/APA PRR-410-2011, “Standard for Performance-Rated Engineered Wood Rim Boards.” This evaluation is based solely on the APA EWS certification to the ANSI/APA PRR-410 standard.

This evaluation covers rim boards manufactured by Ainsworth Lumber Co. Ltd. at the following plants:

  • 100 Mile House, British Columbia:
    • Grade B2: 1 1/8" (28.6 mm) thick
  • Grande Prairie, Alberta:
    • Grade B1: 1 ¼" (31.8 mm) thick
    • Grade B2: 1 ⅛" (28.6 mm) thick
    • Grade C2: 1" (25.4 mm) thick
  • Barwick, Ontario:
    • Grade B1: 1 ¼" (31.8 mm) thick
    • Grade B2: 1 ⅛" (28.6 mm) thick
    • Grade C1: 1 ⅛" (28.6 mm) thick
    • Grade C2: 1" (25.4 mm) thick

2. Description

The product is an oriented strandboard (OSB) that is manufactured to serve as a rim board and is available in four grades and three thicknesses, as shown above. The factored resistances of the four grades are outlined in Table 1 of the Preface. The nominal depths are available to match engineered wood joist depths of up to 610 mm. Technical product support is provided by APA.

3. Standard and Regulatory Information

See the Preface and the standard for explanation.

Listing Holder

APA - The Engineered Wood Association
7011 South 19th Street
Tacoma, WA 98466
U.S.A.

Telephone:
253-565-6600
Fax:
253-565-7265

Plant(s)

100 Mile House, BC
Grande Prairie, AB
Barwick, ON

Disclaimer

This Listing is issued by the Canadian Construction Materials Centre, a program of NRC Construction at the National Research Council of Canada. The Listing must be read in the context of the entire CCMC Registry of Product Evaluations.

Readers must confirm that the Listing is current and has not been withdrawn or superseded by a later issue. Please refer to the CCMC web site, or contact the Canadian Construction Materials Centre, NRC Construction, National Research Council of Canada, 1200 Montreal Road, Ottawa, Ontario, K1A 0R6. Telephone (613) 993-6189. Fax (613) 952-0268.

NRC has evaluated the material, product, system or service described herein only for those characteristics stated herein. The information and opinions in this Listing are directed to those who have the appropriate degree of experience to use and apply its contents. This Listing is provided without representation, warranty, or guarantee of any kind, expressed, or implied, and the National Research Council of Canada (NRC) provides no endorsement for any evaluated material, product, system or service described herein. NRC accepts no responsibility whatsoever arising in any way from any and all use and reliance on the information contained in this Listing. 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.