December 20, 2006 PARTIES INTERESTED IN EVALUATION REPORTS ON ALTERNATE DOWEL-TYPE THREADED FASTENERS

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1 ICC EVALUATION SERVICE, INC. Evaluate P Inform P Protect December 20, 2006 TO: PARTIES INTERESTED IN EVALUATION REPORTS ON ALTERNATE DOWEL-TYPE THREADED FASTENERS SUBJECT: Proposed Revisions to the Acceptance Criteria for Alternate Dowel-type Threaded Fasteners, Subject (DM/ PB/GN/JS) Dear Madam or Sir: Hearing Information: Thursday, February 8, :00 a.m. The Westin Los Angeles Airport 5400 West Century Boulevard Los Angeles, California (310) The enclosed proposed revisions to the subject acceptance criteria will be considered at the Evaluation Committee hearing noted above. The revisions were requested by industry and are a result of combining the original AC233 and AC233 Part B into one document. The major revisions are as follows: 1. Title, Sections 1.1, 1.2 and 3.1: The diameter size of the fastener has been removed from the title of the criteria as well as the sections noted. There are a few places in the criteria where the diameter of the fastener is important and will be addressed in those individual sections. 2. Section 1.3.4: The 2004 Supplement to the AISI NASPEC was added to the NASPEC reference. 3. Section 2.1.1: The diameter used in the criteria has been expanded to include three locations on the fastener. They are the shank, outside thread, and the minor diameters. The individual sections in the criteria will note the diameter used for that section. Business/Regional Office P 5360 Workman Mill Road, Whittier, California P (562) Regional Office P 900 Montclair Road, Suite A, Birmingham, Alabama P (205) Regional Office P 4051 West Flossmoor Road, Country Club Hills, Illinois P (708)

2 2 4. Section 3.3: This section recognizes the difference between fastener diameters for withdrawal by referring to the withdrawal equations for both lag screws and wood screws. Applicants are allowed to use the equations that best fit their fastener, as long as the calculated result is less than the tested value divided by a factor of 5. The recognition of alternate threads that are not covered by the reference documents for wood screws and lag screws will be allowed to exceed the calculated results for withdrawal. 5. Section 3.4.2: Items 1, 4, 5 and 6 in this section are being revised to be consistent with AC233 Part B. Items 1, 4 and 6 will not have an effect on the way fasteners are being evaluated. However, Item 5 is being revised to only allow dowel bearing strengths shown in the NDS. The testing option, which would allow the determination of dowel bearing strength in both the perpendicular and parallel direction to grain of fasteners less than 1 / 4 inch in diameter, is being removed. 6. Section 3.6.2: The combining of the original AC233 and AC233 Part B required that the diameter distinction be maintained in this section. 7. Section 5.0: This section was revised to accommodate the new requirements of AC Section 6.3.3: This section was revised to provide better information to the building official regarding the statement, This evaluation report does not address fastener corrosion when the fastener is installed in chemically treated wood. Instead, the revised statement points the building official to the report holder or the manufacturer of the chemical treatment for recommendations. 9. Tables 1 and 2: Note 2 was revised to clarify whether the length of thread (or thread length) includes or excludes the tip. 10. Table 3: Note 3 was added to Table 3 for a case where the 1997 UBC is requested.

3 3 11. Table 4: Notes 3 and 4 were added to Table 4. Note 3 was added for the case where a steel side plate is used for lateral design values. Note 4 was added for a case where the 1997 UBC is requested. 12. Table 5: Table 5 was added to give a format to the data required in Section 3.7. The ICC-ES staff concurs with the revisions except for the following items: The criteria: The criteria was written using the 2001 NDS terminology for allowable stress design (ASD). The ICC-ES revised the criteria to be consistent with the 2005 NDS. The words allowable and nominal were replaced with the term reference. Section 6.3.3: The ICC-ES staff is in agreement with this statement, but does not want to include it in this criteria, since there is a possibility that it could be removed by committee at a later date when the issue of corrosion resistance is addressed in another criteria. The staff suggests including this statement in the ESR report. Tables 1, 2, 3, 4 and 5: Table 2: SI units for pounds and pressure (psi) needed to be added to the tables. The ICC-ES staff suggests that Note 2 be revised as follows: 2 Reference withdrawal design values are to be multiplied by the portion of thread length embedded into the main member, up to, but not exceeding the total thread length. *Length includes tapered tip. **Length excludes tapered tip. The ICC-ES staff has the following additional comments: Section 3.4.2, Item 5: The original AC233 allowed the testing option for determining dowel bearing strength for fasteners having diameters of less than 1 / 4 inch for both the perpendicular and parallel directions. ICC-ES has received new information

4 4 indicating this approach may not be correct. ICC-ES originally accepted the test approach based on the understanding that self drilling fasteners would create a dowel bearing condition in the member that is different than that of a pre-drilled hole. During discussions with industry concerning the proposed revision, it was suggested that a condition of use be added that would require the fasteners, evaluated under the self-drilling condition, to be limited to that method of installation. Industry has concerns with such a condition of use being made a part of an evaluation report on the grounds that many installers prefer to predrill all fasteners regardless of the fastener s ability to be installed without predrilling. Therefore, ICC-ES staff suggests the deletion of the dowel bearing test. New concern: The ICC-ES staff requests input on how to evaluate fasteners with wings or lags on the shank of the fastener just above the end of the threaded section. These wings would appear to soften the wood in the hole or enlarge the hole, thereby allowing the shank to slide by with little or no friction. By reducing the friction, the chances of torsional failure in the shank would be reduced. However, by softening the wood or enlarging the hole, the dowel bearing strength or joint stiffness may be reduced, which would affect the lateral design value. You are cordially invited to submit written comments, or to attend the Evaluation Committee hearing and present verbal comments. Written comments will be forwarded to the committee, prior to the hearing, if received by January 23, If the deadline is missed, you must provide 35 copies of the submittal material, collated, stapled and threehole punched, to the Los Angeles business/regional office before the committee meeting. Your consideration in providing written responses by the deadline would be greatly appreciated. Consideration of written comments and presentations of a significant nature received the week of the hearing or at the hearing may be delayed until a future meeting as the committee and staff may not have adequate time for review. NEW FOR THE FEBRUARY 2007 MEETING! On a trial basis, starting with the February 2007 Evaluation Committee meeting, comments from interested parties that are submitted in response to proposed acceptance criteria will be posted on the ICC-ES web site prior to the meeting. Postings will occur shortly after the comment deadline (January 23, 2007). Staff memos responding to some of the comments, and comments received after the January 23 deadline, will be posted on February 1, The purpose for posting the comments prior to the meeting is to help interested parties be better prepared to discuss the issues at the meeting. Any written material submitted for committee consideration will be available for public distribution as set forth in Section 2.7 of the Rules of Procedure for the Evaluation Committee (copy enclosed).

5 5 Visual aids (including, but not limited to, charts, overhead transparencies, slides, videos, or presentation software) for viewing at meetings will be permitted only if the presenter provides to ICC-ES, before the presentation, a copy of the visual aid(s) in a medium that can be retained by ICC-ES with its record of the meeting, and that can also be provided to interested parties. Your cooperation is requested in forwarding to the Los Angeles business/regional office all material directed to the Evaluation Committee. Parties interested in the deliberations of the committee should refrain from communicating, whether in writing or verbally, with committee members regarding agenda items. The committee reserves the right to refuse communications that do not comply with this request. Newly approved acceptance criteria may involve test methods or test protocols that are not currently included in the scope of testing services offered by accredited testing laboratories. As noted in the ICC-ES Rules of Procedure for Evaluation Reports, the scope of the laboratory s accreditation must include the type of testing that is to be reported to ICC-ES. We encourage accredited laboratories to expand their scopes of accreditation to include testing under newly approved acceptance criteria. Please note that testing laboratories must be accredited by the International Accreditation Service (IAS) or by another accreditation body that is a signatory to the International Laboratory Accreditation Cooperation Mutual Recognition Arrangement. For further information, please contact IAS at (562) , extension 3309, or send an to pmccullen@iasonline.org. If you have any questions, please contact the undersigned at (800) , extension 5681, or Jason Smart, senior evaluation specialist, at extension You may also reach us by at es@icc-es.org. Yours very truly, DM/PB/ll Enclosures J. David Musselwhite, P.E. Senior Staff Engineer cc: Evaluation Committee

6 ICC EVALUATION SERVICE, INC. Evaluate P Inform P Protect ICC EVALUATION SERVICE, INC., RULES OF PROCEDURE FOR THE EVALUATION COMMITTEE 1.0 PURPOSE The purpose of the Evaluation Committee is to monitor the work of ICC-ES, in issuing evaluation reports; to evaluate and approve acceptance criteria on which evaluation reports may be based; and to sponsor related changes in the applicable codes. 2.0 MEETINGS 2.1 The Evaluation Committee shall schedule meetings that are open to the public in discharging its duties under Section 1, subject to Section All scheduled meetings shall be publicly announced. 2.3 Two-thirds ( 2 / 3 ) of the voting Evaluation Committee members shall constitute a quorum. A majority vote of members present is required on any action. 2.4 In the absence of the nonvoting chairman-moderator, Evaluation Committee members present shall elect an alternate chairman from the committee for that meeting. The alternate chairman shall be counted as a voting committee member for purposes of maintaining a committee quorum and to cast a tie-breaking vote of the committee. 2.5 Minutes of the meetings shall be kept. 2.6 An electronic audio record of meetings shall be made by ICC-ES; no other audio, video, electronic or stenographic recordings of the meetings will be permitted. Visual aids (including, but not limited to, charts, overhead transparencies, slides, videos, or presentation software) viewed at meetings shall be permitted only if the presenter provides ICC-ES before presentation with a copy of the visual aid in a medium which can be retained by ICC-ES with its record of the meeting and which can also be provided to interested parties requesting a copy. A copy of the ICC-ES recording of the meeting and such visual aids, if any, will be available to interested parties upon written request made to ICC-ES together with a payment as required by ICC-ES to cover costs of preparation and duplication of the copy. These materials will be available beginning five days after the conclusion of the meeting but will no longer be available after 30 days have elapsed from the conclusion of the meeting. 2.7 Parties interested in the deliberations of the committee should refrain from communicating, whether in writing or verbally, with committee members regarding agenda items. All written communications and submissions regarding agenda items should be delivered to ICC-ES. All such written communications and submissions shall be considered nonconfidential and available for discussion in open session of an Evaluation Committee meeting, and shall be delivered at least ten days before the scheduled Evaluation Committee meeting if they are to be forwarded to the committee. Correspondence received by ICC-ES will not be released to any party, except to the Evaluation Committee, prior to the meeting without permission of the author. The committee reserves the right to refuse recognition of communications which do not comply with the provisions of this section. All such communications and submissions will be available from ICC-ES upon written request and payment of costs associated with duplication. The materials will be available beginning five days after the conclusion of the meeting but will no longer be available after 30 days have elapsed from the conclusion of the meeting. 3.0 CLOSED SESSIONS Evaluation Committee meetings shall be open except that the chairman may call for a closed session to seek advice of counsel. 4.0 ACCEPTANCE CRITERIA 4.1 Acceptance criteria are established by the committee to provide a basis for issuing ICC-ES evaluation reports on products and systems under codes referenced in Section 2.0 of the Rules of Procedure for Evaluation Reports. They also clarify conditions of acceptance for products and systems specifically regulated by the codes. Acceptance criteria may involve a product, material, method of construction, or service. Consideration of any acceptance criteria must be in conjunction with a current and valid application for an ICC-ES evaluation report, an existing ICC-ES evaluation report, or as otherwise determined by the Evaluation Committee. 4.2 Procedure: Proposed acceptance criteria shall be developed by the ICC-ES staff and discussed in open session with the Evaluation Committee during a scheduled meeting, except as permitted in Section 5.0 of these rules Proposed acceptance criteria shall be available to interested parties at least 30 days before discussion at the committee meeting The committee shall be informed of all pertinent written communications received by ICC-ES Attendees at Evaluation Committee meetings shall have the opportunity to speak on acceptance criteria listed on the meeting agenda, to provide information to committee members. 4.3 Approval of acceptance criteria shall be as specified in Section 2.3 of these rules. 4.4 The action of the Evaluation Committee may be appealed in accordance with the ICC-ES Rules of Procedure for Appeal of Acceptance Criteria. Business/Regional Office P 5360 Workman Mill Road, Whittier, California P (562) Regional Office P 900 Montclair Road, Suite A, Birmingham, Alabama P (205) Regional Office P 4051 West Flossmoor Road, Country Club Hills, Illinois P (708)

7 ICC EVALUATION SERVICE, INC., RULES OF PROCEDURE FOR THE EVALUATION COMMITTEE 5.0 COMMITTEE BALLOTING FOR ACCEPTANCE CRITERIA 5.1 Acceptance criteria may be issued without a public hearing following a 45-day public comment period and a majority vote for approval by the Evaluation Committee when, in the opinion of ICC-ES staff, one or more of the following conditions have been met: 1. The subject is nonstructural, does not involve life safety, and is addressed in nationally recognized standards or generally accepted industry standards. 2. The subject is a revision to an existing acceptance criteria that requires a formal action by the Evaluation Committee, and public comments raised were resolved by staff with commenters fully informed. 3. Other acceptance criteria and/or the code provide precedence for the revised criteria. 5.2 Negative votes must be based upon one or more of the following, for the ballots to be considered valid and require resolution: a. Lack of clarity: There is insufficient explanation of the scope of the acceptance criteria or insufficient description of the intended use of the product or system; or the acceptance criteria is so unclear as to be unacceptable. (The areas where greater clarity is required must be specifically identified.) b. Insufficiency: The criteria is insufficient for proper evaluation of the product or system. (The provisions of the criteria that are in question must be specifically identified.) c. The subject of the acceptance criteria is not within the scope of the applicable codes: A report issued by ICC- ES is intended to provide a basis for approval under the codes. If the subject of the acceptance criteria is not regulated by the codes, there is no basis for issuing a report, or a criteria. (Specifics must be provided concerning the inapplicability of the code.) d. The subject of the acceptance criteria needs to be discussed in a public hearings. The committee member requests additional input from other committee members, staff or industry. 5.3 An Evaluation Committee member, in voting on an acceptance criteria, may only cast the following ballots: Approved Approved with Comments Negative: Do Not Proceed 6.0 COMMITTEE COMMUNICATION Direct communication between committee members, and between committee members and an applicant or concerned party, with regard to the processing of a particular acceptance criteria or evaluation report shall take place only in a public hearing of the Evaluation Committee. Accordingly: 6.1 Committee members receiving an electronic ballot should respond only to the sender (staff). Committee members who wish to discuss a particular matter with other committee members, before reaching a decision, should ballot accordingly and bring the matter to the attention of ICC-ES staff, so the issue can be placed on the agenda of a future committee meeting. 6.2 Committee members who are contacted by an applicant or concerned party on a particular matter that will be brought to the committee will refrain from private communication and will encourage the applicant or concerned party to forward their concerns through the ICC- ES staff in writing, and/or make their concerns known by addressing the committee at a public hearing, so that their concerns can receive the attention of all committee members.# Effective November 6,

8 ICC EVALUATION SERVICE, INC. Evaluate P Inform P Protect PROPOSED REVISIONS TO THE ACCEPTANCE CRITERIA FOR ALTERNATE DOWEL-TYPE THREADED FASTENERS AC233 Proposed Previously approved October 2006, February 2006, October 2005, June 2005, June 2004 PREFACE Evaluation reports issued by ICC Evaluation Service, Inc. (ICC-ES), are based upon performance features of the International family of codes and other widely adopted code families, including the Uniform Codes, the BOCA National Codes, and the SBCCI Standard Codes. Section of the International Building Code reads as follows: The provisions of this code are not intended to prevent the installation of any materials or to prohibit any design or method of construction not specifically prescribed by this code, provided that any such alternative has been approved. An alternative material, design or method of construction shall be approved where the building official finds that the proposed design is satisfactory and complies with the intent of the provisions of this code, and that the material, method or work offered is, for the purpose intended, at least the equivalent of that prescribed in this code in quality, strength, effectiveness, fire resistance, durability and safety. Similar provisions are contained in the Uniform Codes, the National Codes, and the Standard Codes. ICC-ES may consider alternate criteria, provided the report applicant submits valid data demonstrating that the alternate criteria are at least equivalent to the criteria proposed in this document, and otherwise meet the applicable performance requirements of the codes. Notwithstanding that a product, material, or type or method of construction meets the requirements of the criteria proposed in this document, or that it can be demonstrated that valid alternate criteria are equivalent to the criteria in this document and otherwise meet the applicable performance requirements of the codes, ICC-ES retains the right to refuse to issue or renew an evaluation report, if the product, material, or type or method of construction is such that either unusual care with its installation or use must be exercised for satisfactory performance, or malfunctioning is apt to cause unreasonable property damage or personal injury or sickness relative to the benefits to be achieved by the use of the product, material, or type or method of construction. Business/Regional Office P 5360 Workman Mill Road, Whittier, California P (562) Regional Office P 900 Montclair Road, Suite A, Birmingham, Alabama P (205) Regional Office P 4051 West Flossmoor Road, Country Club Hills, Illinois P (708)

9 Page 2 PROPOSED REVISIONS TO THE ACCEPTANCE CRITERIA FOR ALTERNATE DOWEL-TYPE THREADED FASTENERS % INTRODUCTION 1.1 Purpose: The purpose of this acceptance criteria is to establish requirements for alternate dowel-type threaded fasteners to be recognized in an ICC Evaluation Service, Inc. (ICC-ES), evaluation report under the 2006 International Building Code (IBC), the 2006 International Residential Code (IRC), and the 1997 Uniform Building Code (UBC). Bases of recognition are IBC Section and IRC Section R The reason for development of this criteria is to develop provide guidelines for the evaluation of alternate fasteners, that are held in place by threaded anchorage in the main member, to those addressed by the code or the code reference, the NDS. 1.2 Scope: This criteria is applicable to alternate dowel-type threaded fasteners used for wood-to-wood or metal-to-wood connections. A fastener is considered an alternate when it has different dimensions than those specified in ANSI B or ANSI B18.6.1, or when it is self-drilling (installed without a lead hole). 1.3 Codes and Referenced Standards: Where standards are referenced in this criteria, the standards shall be applied consistently with the code (IBC or IRC) upon which compliance of the fastener is based International Building Code (IBC), International Code Council.

10 Page International Residential Code (IRC), International Code 21 Council Uniform Building Code (UBC) AISI (2002) Cold-formed Steel Design Manual, Part VI Test Procedures for Use with the 2001 Edition of the North American Specification for the Design of Cold-Formed Steel Structural Members with 2004 Supplement, American Iron and Steel Institute ANSI/AF&PA National Design Specification for Wood Construction (NDS), 2005 edition, American Forest & Paper Association ANSI/AF&PA Technical Report 12, General Dowel Equations for Calculating Lateral Connection Values, 1999, American Forest & Paper Association ANSI/ASME Standard B , Square and Hex Bolts and Screws (Inch Series), American Society of Mechanical Engineers ANSI/ASME Standard B (reaffirmed 1997), Wood Screws (Inch Series), American Society of Mechanical Engineers ASTM D , Standard Test Methods for Evaluating Properties of Wood-Base Fiber and Particle Panel Materials, ASTM International ASTM D (2000)e01, Test Methods for Mechanical Fasteners in Wood, ASTM International ASTM D , Standard Test Method for Specific Gravity of Wood and Wood-Based Materials, ASTM International.

11 Page ASTM D , Standard Practice for Evaluating Allowable Properties for Grades of Structural Lumber, ASTM International ASTM D (2003), Standard Test Methods for Direct Moisture Content Measurement of Wood and Wood-Base Materials, ASTM International ASTM D (1998),1, Standard Test Methods for Use and Calibration of Hand-Held Moisture Meters, ASTM International ASTM D a, Standard Test Method for Evaluating Dowel-Bearing Strength of Wood and Wood-Based Products, ASTM International ASTM E 8-01,2, Standard Test Methods for Tension Testing of Metallic Materials, ASTM International ASTM F , Standard Test Method for Determining Bending Yield Moment of Nails, ASTM International NASM (1997), National Aerospace Standard Practice for Fastener Test Methods, Method 20, Single Shear; Aerospace Industries Association of America, Inc. 2.0 BASIC INFORMATION 2.1 General: The following information shall be submitted: Product Description: Complete information concerning material specifications, diameters (shank, outside thread and minor), thread type (cut or rolled), size, and the manufacturing process.

12 Page % Installation Instructions: Installation details and limitations Packaging and Identification: A description of the method of packaging and field identification of the screws. Where practical with respect to available space on the fastener head, each fastener shall be identified by the manufacturer s identifying mark or logo and the length designation. Each container of fasteners shall have a label noting the evaluation report holder s name and address, the evaluation report number, and the fastener size. 2.2 Testing Laboratories: Testing laboratories shall comply with Section 2.0 of the ICC-ES Acceptance Criteria for Test Reports (AC85) and Section 4.2 of the ICC- ES Rules of Procedure for Evaluation Reports. 2.3 Test Reports: Test reports shall comply with AC Product Sampling: Sampling of the fastener(s) for tests under this criteria shall comply with Section 3.2 of AC TEST AND PERFORMANCE REQUIREMENTS 3.1 General: Alternate dowel-type threaded fasteners shall be evaluated as described in this section. Fastener and metal part material specifications shall conform to a national industry standard. Tests shall be performed for each variation of fastener length, thread length, side and main member thickness, steel strength, specific gravity, side and main member orientation, and fastener diameter, unless a pattern of performance and failure mode can be established. Alternatively, reference design

13 Page % % % values may be interpolated from a regression line fitted to tests of connections when all of the following conditions are met: (1) only specific gravity is allowed to vary in the test series; (2) a sufficient number of tests is conducted to result in a coefficient of determination greater than or equal to 0.90, and a percentage standard error of estimate of less than 10 percent; and (3), in lateral load testing, a regression line shall pertain to tests exhibiting a common yield mode Allowable Reference design loads for connections with wood members may be derived for species identified in NDS Table A. Members of target species used in test connections shall have a specific gravity determined on an oven-dry weight and volume basis equal to or lower than the NDS table values, and shall be equilibrated to a target moisture content. Testing of specific gravity and moisture content shall be in accordance with Section Allowable load Reference design values derived from connection tests may be assigned to like connections with wood species having a higher specific gravity than tested. However, allowable loads reference design values for connections with wood species exceeding a specific gravity of 0.50 shall be evaluated if predrilled holes meeting the requirements of NDS Section are not used. 3.2 Design of Metal Fasteners and Side Plates: Design of metal fasteners and side plates shall comply with Section of the NDS Tensile and shear tests shall be performed on the fastener in accordance with Section 4.2 of this criteria.

14 Page % % % 113 % % % % Standard tensile test specimens of the sheet steel or plate from which the side member is produced shall be made in accordance with ASTM E The allowable tensile reference tension or shear design load of a fastener shall be taken as the average maximum load from the tests divided by a safety factor of When the capacity of a connection is controlled by fastener or side plate metal strength, rather than wood strength, the allowable reference strength of the connection shall not be permitted to be multiplied by the adjustment factors specified in the NDS. 3.3 Reference Withdrawal Design Values: Fastener withdrawal strength shall be tested in accordance with Section 4.3. The tested allowable reference withdrawal capacity shall be the average maximum test value divided by a factor of 5 and divided by the length of the embedded thread. The calculated allowable reference withdrawal capacity shall be the tabulated design value, W, computed using the equations in NDS Section 11.2, where G is taken as the average tested specific gravity and D is taken as the outside thread diameter. When using equation , both the calculated and tested allowable reference withdrawal capacities shall be determined without including the fastener tip. When using equation , both the calculated and tested capacities shall include the fastener tip. The lesser of the tested or calculated allowable reference withdrawal capacities shall be used. If the thread geometry of the

15 Page % % 127 % % % tested fastener does not conform to NDS Appendix L, ANSI Standard B18.2.1, or ANSI Standard B18.6.1, the tested allowable reference withdrawal capacity may be used regardless of the calculated capacity. Adjustment factors are permitted to be applied to the allowable reference load per NDS Table Reference Lateral Design Values: Allowable Reference lateral design values shall be determined in accordance with Section or Section of this criteria. Tests for lateral resistance shall be in accordance with Section Bending yield strength for all fastener diameters and lengths shall be determined by tests in accordance with Section 4.4. The average bending yield strength of the tested fasteners shall not exceed the specified minimum bending yield strength by more than 10 percent This section is applicable to connections where the side plate is wood or steel. The calculated allowable reference design value shall be determined using the yield limit equations found in NDS Section or by the general dowel equations in AF&PA s Technical Report 12, Table 1, using the following assumptions: 1. The R D R d term shall be determined in accordance with the NDS. 2. The following fastener diameters shall be used: Equations found in the NDS shall assume a diameter equal to the minor diameter at the threads.

16 Page % All equations found in Technical Report 12 shall assume a diameter equal to the minor diameter at the threads except the diameter used to calculate q s in Table 1. This diameter can be either the shank diameter or the minor diameter at the threads as evaluated. If the shear plane is in the threads, the minor diameter shall be used. 3. For steel side plate connections, the calculated Mode IV yield value shall be permitted to be used to determine the calculated allowable value where Mode IV yielding is observed during the test and the steel side plate is at least as thick as the tested steel side plate. 4. For steel side plate connections, the steel dowel bearing strength, F es, shall be permitted to be taken as 2.4F u /1.6 for hot rolled steel plate specified in the Specification for Structural Steel Building (ANSI/AISC 360), or 2.2F u /1.6 for cold-formed steel specified in the North American Specification for the Design of Cold-Formed Steel Structural Members (NASPEC 2001). 5. Wood properties shall be in accordance with the NDS. 6. The dowel bearing length shall be determined per Section of the NDS. D shall be taken as the shank diameter. The allowable reference lateral design value shall be taken as the lesser of the calculated allowable value or the average ultimate test value divided by 3.2.

17 Page % 165 % This section is applicable to connections where the side plate is wood or steel. The allowable reference lateral design value may exceed the calculated capacity used based on Section in this criteria, when the allowable reference design value is taken as the average ultimate test value divided by If the yield point of the steel from which the tested steel side plate is formed is larger than the specified value, the test results shall be adjusted downward by a factor, R s, determined from the following equation: 3.0 R s = # Fu spec t spec Fu tested t tested where: R s = Steel ratio. (F u!spec) = Published ultimate strength of the side plate steel, psi. (F u!tested) = Measured ultimate strength of the side plate steel used in the test, psi. (t!spec) = Specified minimum side plate thickness, inch. (t!tested) = Measured thickness of tested side plate thickness, inch. 3.5 Combined Lateral and Withdrawal Load Design Values: Combined lateral and withdrawal load design values shall conform to Section 11.4 of the NDS.

18 Page % Adjustment of Reference Design Values: For fasteners intended for connections in wood that is exposed to wet service conditions in use, wet service factors (C m ) for the connections shall be established by comparing the results of withdrawal and lateral fastener tests specified in Sections 4.3 and 4.5, respectively, for green (greater than 19 percent moisture content) versus dry (10 to 14 percent moisture content) wood samples. The wet service factor shall be determined as the ratio of average test values of green and dry samples for each specific gravity. In no case shall the wet service factor be greater than specified in Table of the NDS Minimum end and edge distances shall be derived from the allowable load tests of Sections 3.3 and 3.4. Alternatively, confirmatory tests may be run to establish end and edge distance criteria. These tests shall be in accordance with Sections 3.3 and 3.4. In no case shall the edge and end distances be less than specified in Table C of the NDS Commentary for fasteners with shank diameters less than 1 / 4 inch, or less than minimum values specified in NDS Tables A through E for fasteners with shank diameters equal to or greater than 1 / 4 inch Multiple fastener design values shall conform to Section 11.6 of the NDS. 3.7 Fastener Pull-through: Fastener pull-through testing shall be conducted in accordance with Section 4.6. Alternatively, if the fastener has a straight, nontapered

19 Page shank that extends to an integral washer head, the pull-through may be calculated using the principles of bearing set forth in Section 3.10 of the NDS. 4.0 TEST METHODS 4.1 General: All wood samples shall be of clear, straight-grained material. The specific gravity and wood species of the wood materials shall be determined in accordance with ASTM D The moisture content of the wood samples shall be determined in accordance with ASTM D 4442 or D 4444 (handheld moisture meters) Wood samples shall be conditioned to reach equilibrium with a moisture content of 10 to 14 percent when testing for dry in-service conditions. When testing for wet in-service conditions, samples shall be conditioned to an equilibrium moisture content greater than 19 percent. 4.2 Fastener Metal Strength: Tensile and shear tests of fasteners shall be conducted in accordance with AISI TS-4-02 (Standard Test Methods for Determining the Tensile and Shear Strength of Screws). Alternatively, shear tests of fasteners may be conducted in accordance with NASM A minimum number of samples shall be tested to achieve a precision of 5 percent at 95 percent confidence interval, with a minimum sample size of 10 (refer to ASTM D 2915). 4.3 Withdrawal Load Test: Fastener pullout strength shall be tested in accordance with ASTM D Each sample shall have the same embedment length.

20 Page A minimum number of samples shall be tested to achieve a precision of 5 percent at 95 percent confidence interval, with a minimum sample size of 10 (refer to ASTM D 2915). 4.4 Bending Yield Strength: The bending yield strength of fasteners shall be determined in accordance with ASTM F 1575, and the following: The 5 percent diameter bending yield strength shall be defined by the section at the minor thread diameter The fastener shall be placed on the cylindrical bearing points for testing so that the transition zone between shank and thread is as close as possible to the midpoint between the bearing points, with the load applied at the transition or in the threaded section The fastener designation, overall length, length of thread, minor thread diameter, and bending yield strengths shall be recorded. 4.5 Lateral Load Testing: Lateral resistance and fastener slip shall be tested in accordance with ASTM D 1761, and the following: Friction between the main and side members shall be minimized by the use of a friction-reducing barrier. Alternatively, fasteners shall be inserted to a tightness that permits the wood members of the test assembly to rotate relative to each other with only mild pressure The sample size for the lateral load tests shall be sufficient when the tested maximum loads have reached a consistency to achieve a precision of the

21 Page estimate of 5 percent at 95 percent confidence interval, with a minimum sample size of 10 (refer to ASTM D 2915). 4.6 Pull-through Test: Fastener pull-through capacity shall be tested by means of a test setup in which the fastener installed in the side member is pulled through. Modifications of the test procedure for fastener withdrawal described in ASTM D 1037 may be used. A minimum number of samples shall be tested to achieve a precision of 5 percent at 95 percent confidence interval, with a minimum sample size of 10 (refer to ASTM D 2915). If the fastener is to be used with sheathing, the sheathing types for which recognition is sought shall also be tested for pull-through. The mean ultimate capacity per inch of wood side member thickness shall be determined for each fastener diameter and the targeted wood species/specific gravity, and divided by a factor of QUALITY CONTROL 5.1 Documentation complying with the ICC-ES Acceptance Criteria for Quality Documentation (AC10) shall be submitted. 5.2 Third-party follow-up inspections are required under this acceptance criteria. 6.0 EVALUATION REPORT RECOGNITION 6.1 The evaluation report shall include tables similar to those shown in this acceptance criteria. Tables shall be prepared by a registered design professional in accordance with Section 4.1 of the ICC-ES Rules of Procedure for Evaluation Reports.

22 Page % There shall be a table providing fastener specifications. Refer to Table 1 for an example There shall be a table providing withdrawal design values (W). Refer to Table 2 for an example There shall be a table providing reference lateral design values (Z) for single shear (two-member) connections. Refer to Table 3 for connections consisting of two wood members having identical specific gravity, and Table 4 for connections consisting of one wood member and one steel side plate member. 6.2 The evaluation report shall include the allowable fastener metal strength determined in accordance with Section The evaluation report shall include the following statements: When the capacity of a connection is controlled by fastener or side plate metal strength, rather than wood strength, allowable strength of the connection shall not be permitted to be multiplied by the adjustment factors specified in the NDS When designing a connection, the connection shall be checked against Appendix E in the NDS to ensure the capacity of the connection and fastener group The use of fasteners recognized in this evaluation report with preservative- or fire-retardant-treated wood is outside the scope of this report. The report holder or the manufacturer of the chemical treatment must be consulted for

23 Page recommendations on minimum corrosion-resistant protection for the fasteners used with a specific wood treatment. # DM/ll

24 Page 17 TABLE 1 FASTENER SPECIFICATIONS FASTENER DESIGNATION OVERALL LENGTH 1 (inches) LENGTH OF THREAD 2 (inches) MINOR THREAD DIAMETER 3 (inches) SHANK DIAMETER 3 (inches) OUTSIDE THREAD DIAMETER 3 (inches) ALLOWABLE STEEL STRENGTH Bending Yield Strength 4, F yb (psi) Tension (pounds) Shear (pounds) For SI: 1 inch = 25.4 mm. 1 For purposes of measuring overall fastener length, countersinking type shall be measured from top of head to bottom of tip. Washer type shall be measured from underside of head to bottom of tip. 2 *Length of thread includes tip. **Length of thread excludes tip. See detailed illustration. 3 Minor thread, shank and outside thread diameters are shown in table with manufacturing tolerances in brackets [ ]. 4 Bending yield strength determined in accordance with ASTM D 1575 using the minor thread diameter. % TABLE 2 NOMINAL REFERENCED WITHDRAWAL DESIGN VALUES (W) 1 [Tabulated Withdrawal Design Values (W) Are in Pounds per Inch of Thread Penetration into Side Grain of Main Member] FASTENER DESIGNATION THREAD LENGTH 2, L (inch) W (lbs./in.) FOR SPECIFIC GRAVITIES OF: For SI: 1 inch = 25.4 mm. 1 Values shall be multiplied by all applicable adjustment factors (see NDS). 2 Embedded thread length is that portion held by the main member. *Length includes tapered tip. **Length excludes tapered tip. % TABLE 3 NOMINAL REFERENCED LATERAL DESIGN VALUES (Z) FOR SINGLE SHEAR (TWO-MEMBER) CONNECTIONS 1 (For Sawn Lumber or SCL with Both Members of Identical Specific Gravity) FASTENER DESIGNATION SIDE MEMBER THICKNESS, t s (inch) For SI: 1 inch = 25.4 mm. FASTENER PENETRATION 2, p (inch) NOMINAL LATERAL DESIGN VALUE (Z) FOR SPECIFIC GRAVITIES OF: (pounds) Z 2 Zz s Zz m Zz Z 2 Zz s Zz m Zz Z 2 Zz s Zz m Zz Z 2 Zz s Zz m Zz Z 2 Zz s Zz m Zz Z 2 Zz s Zz m Zz Z 2 Zz s Zz m Zz 1 Values shall be multiplied by all applicable adjustment factors (see NDS). 2 Embedded thread length is that portion held by the main member. 3 For 1997 UBC and 2000 IBC/IRC values: when penetration, P, into the main member is less than 8D (D = shank diameter) the values in the table shall be multiplied by the following penetration depth factor: C d = P/8D # 1.0.

25 Page 18 % TABLE 4 NOMINAL REFERENCED LATERAL DESIGN VALUES (Z) FOR SINGLE SHEAR (TWO-MEMBER) CONNECTIONS 1 (With Steel Side Plate) FASTENER DESIGNATION For SI: 1 inch = 25.4 mm. SIDE MEMBER THICKNESS, t s (inch) FASTENER PENETRATION 2, p (inch) NOMINAL LATERAL DESIGN VALUE (Z) FOR SPECIFIC GRAVITIES OF: (pounds) Z 2 Zz Z 2 Zz Z 2 Zz Z 2 Zz Z 2 Zz Z 2 Zz Z 2 Zz 1 Values shall be multiplied by all applicable adjustment factors (see NDS). 2 Embedded thread length is that portion held by the main member. 3 Minimum steel side plate tensile strength F u = -- ksi. 4 For 1997 UBC and 2000 IBC/IRC values: when penetration, P, into the main member is less than 8D (D = shank diameter) the values in the table shall be multiplied by the following penetration depth factor: C d = P/8D # 1.0. TABLE 5 PULL-THROUGH DESIGN VALUES (P) 1,2 FASTENER DESIGNATION SIDE MEMBER THICKNESS (inches) P (lbs./in.) FOR SPECIFIC GRAVITIES OF: For SI: 1 inch = 25.4 mm. 1 Values shall be multiplied by all applicable adjustment factors (see NDS). 2 Tabulated pull-through design values (P) are in pounds per inch through side member.