April 17, 2015
TO:
PARTIES INTERESTED IN JOIST HANGERS AND SIMILAR DEVICES
SUBJECT: Proposed Revisions to the Acceptance Criteria for Joist Hangers and Similar
Devices, Subject AC13-0615-R3 (JF/PC)
Hearing Information:
Tuesday, June 2, 2015
8:00 am
Sheraton Gateway Hotel
6101 West Century Boulevard
Los Angeles, California 90045
(310) 642-4842
Dear Colleague:
You are invited to comment on proposed revisions to AC13, which will be discussed at the
Evaluation Committee hearing noted above. The revisions include updating the subject
criteria to contain the 2015 International Building Code® (IBC) and 2015 International
Residential Code® (IRC). Requests for comments on this subject were posted in October
2014 and February 2015 through ICC-ES Alternate Criteria Process. Comments received
from those postings have been taken into consideration in drafting the enclosed revised
criteria.
The following summarizes the proposed revisions:
1. Sections 2303.5 and 2304.10.3 of the 2015 IBC identify ASTM D7147 as the only test
standard for joist hangers. Earlier editions of the IBC identified ASTM D1761 for testing
joist hangers. Allowable loads were determined in accordance with AC13. The new
reference standard, ASTM D7147, contains testing requirements and the procedure for
determining allowable values. With regard to direct vertical load testing, it is the staff’s
understanding that the testing requirements of D7147 are more comprehensive and better
account for variations in test material properties at time of testing. As such, allowable
load values determined previously using ASTM D1761 may be non-conservative with
respect to the 2015 IBC. In effort to comply with the more stringent and potentially
conservative requirements of the 2015 Code, and not require undue retesting of
previously approved products, the following revisions have been made:
AC13-0615-R3
2
a. The entire acceptance criteria for recognition under the 2012, 2009, and 2006 IBC and
IRC has been moved into Appendix A – Evaluations under the 2012, 2009, and 2006
IBC and IRC. Devices qualified under the those codes may remain qualified under
them.
b. A new main criteria has been developed for report holders who seek recognition for
devices only under the 2015 IBC and IRC.
c. Under Section 3.3 of the new criteria, devices previously tested under ASTM D1761
and recognized under the 2012, 2009, and 2006 Codes, and for which recognition
under the 2015 Codes is requested, are required to be reevaluated for equivalency
with ASTM D7147. Report holders must provide documentation showing reanalysis of
test data to the equivalence of D7147. Such analysis must consider specimen
conditions at the time of testing.
It is hoped by the staff that a general adjustment procedure, or set of adjustment
factors, can be determined by industry consensus.
d. With regard to torsional moment capacity, staff believes that the language contained in
the 2015 IBC and ASTM D7147 lacks sufficient guidance with respect to the use of
torsional moment design loads and the relationship of such with the torsional moment
capacity historically used with the AC13. Therefore, Section 3.4 of the revised criteria
permits the use of either ASTM D7147 or ASTM D1761 for the torsional testing
procedure, with torsional moment capacity determined in accordance with Section 3.4,
which is the same as the current procedure.
2. The acceptance criteria relating to roof joists with one end twisted with respect to the
other has been dropped, as such is believed to be a design issue. See Sections 3.4.3
and A3.4.3.
3. Section 4.5 of the revised criteria has been added to provide criteria for the evaluation of
load transfer mechanisms and fasteners not recognized in the NDS. Previous Section 4.5
has been deleted as the conditions covered in that section are covered Sections 13
through 15 of the ASTM D7147 Standard.
4. Legacy Codes (BNBC, SBC, and UBC) have been removed from the revised criteria.
In addition,
5. It is understood by ICC-ES that joist hanger torsional moment capacity has been required
for straightness and construction issues. However, it also appears that common
construction practice relies on joist hangers to provide end-rotation restraint. Since the
IBC and IRC do not quantify end-rotation-restraint requirements, the revised criteria does
not attempt to connect required torsional moment capacity to permanent end-rotation
AC13-0615-R3
3
restraint. When this relationship is better understood, ICC-ES may consider adding to the
criteria requirements that joist hanger reports address the contribution the hanger
provides to end-rotation restraint.
6. It is believed by ICC-ES staff that face-mounted joist hangers, due to their geometry and
arrangement of fasteners, inherently have sufficient torsional moment capacity. While
face-mounted hangers are not exempt from torsional capacity testing in the revised
criteria, staff seeks industry input and consensus in this regard.
Should the committee approve the proposed revisions to the criteria, report holders applying
to update their reports to the 2015 Codes, and new report applications for recognition under
the 2015 Codes, will be required to provide data in accordance with the criteria. It is
anticipated that new joist hanger reports will provide data in accordance with ASTM D7147
only. Current report holders with data and allowable loads developed in accordance with
ASTM D7147, will not be required to resubmit data.
You are invited to submit written comments on this or any other agenda item, or to attend the
Evaluation Committee hearing and present your views in person. If you wish to contribute to
the discussion, please note the following:
1. Regarding written comments and presentations:
a. You should submit these via e-mail to es@icc-es.org or by U.S. mail to the Western
Regional (Brea) office to be received by the applicable due date.
b. Comments are to be received by May 7, 2015. These written comments will be
forwarded to the committee before the meeting, and will also be posted on the ICC-ES
web site shortly after the deadline for submission. Written comments that are not
submitted by this deadline will not be considered at the meeting.
c. Visual presentations, in PowerPoint format only, are to be received by May 27, 2015.
These will be forwarded to the committee before the meeting, and will also be posted
on the ICC-ES web site shortly after the deadline for submission. Presentations that
are not submitted by the deadline cannot be viewed at the meeting. Note: Videos will
not be posted on the web site.
Presentations will be retained with other records of the meeting. It is the presenter’s
responsibility, prior to the presentation, to verify with ICC-ES staff that the presentation
files have been transferred satisfactorily to the presentation computer.
d. ICC-ES will post to the web site, on May 29, 2015, memos by the ICC-ES staff,
responding to the previously received public comments.
e. If you miss the deadlines for submission of written comments and visual
presentations, your verbal comments can be presented at the meeting.
AC13-0615-R3
4
f. Proposed criteria, written public comments, visual presentations, and responses by
ICC-ES staff will be available at the meeting on a limited number of CDs for uploading
to computers. ICC-ES will not provide any printed copies.
2. Regarding verbal comments and presentations:
Please plan to speak for not more than ten minutes. As noted above, visuals must be in
PowerPoint format. We have a computer, projector, and screen available to those
making visual presentations. It is the presenter’s responsibility, prior to their presentation,
to verify with ICC-ES staff that presentation files have been satisfactorily transferred to
the presentation computer.
3. Keep in mind that all materials submitted for committee consideration are part of the
public record and will not be treated as confidential. It is the presenter’s responsibility to
certify to ICC-ES staff that no materials infringe copyright.
4. Please do not communicate with committee members before the meeting about any items
on the agenda.
We appreciate your interest in the work of the Evaluation Committee. If you have any
questions, please contact me at (800) 423-6587, extension 5593, or Ping Cheng, Senior
Staff Engineer, at extension 3535. You may also reach us by e-mail at es@icc-es.org.
Yours very truly,
Jeff R. Filler, Ph.D., P.E.
Staff Engineer
JRF/raf
Encl.
cc: Evaluation Committee
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A Subsidiary of the International Code Council ®
ICC EVALUATION SERVICE, LLC,
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
MEMBERSHIP
2.1 The Evaluation Committee has a membership of
not fewer than nine nor more than twelve, with one of the
members named by the ICC-ES president each year to
serve as the chairman–moderator.
2.2 All members of the committee shall be
representatives of a body enforcing regulations related to
the built environment.
2.3 Persons are appointed to the committee by the
ICC-ES president, from among individuals who have
formally applied for membership.
2.4 The ICC-ES Board of Managers, using simple
majority vote, shall ratify the nominations of the president.
2.5 Committee membership is for one year, coinciding
with the calendar year. Members may be renominated
and reappointed, but no person shall serve for more than
five consecutive terms.
2.6 In the event that a member is unable to attend a
committee meeting or complete a term on the committee,
the ICC-ES president may appoint a replacement to fill in
at the meeting or for the remainder of the member’s term.
Any replacement appointed for only one meeting must
have prior experience as a member of the Evaluation
Committee. Appointments under this section (Section 2.6)
are subject to ratification as noted in Section 2.4.
3.0
MEETINGS
3.1 The Evaluation Committee shall schedule
meetings that are open to the public in discharging its
duties under Section 1.0, subject to Section 3.0.
3.2 All scheduled meetings shall be publicly
announced. There shall be three in-person meetings per
year. If required, there may also be one conference-call
meeting per year, this meeting to last no more than one
day.
3.3 Two-thirds of the Evaluation Committee members,
counting the chairman, shall constitute a quorum. A
majority vote of members present is required on any
action. To avoid any tie vote, the chairman may choose to
exercise or not exercise, as necessary, his or her right to
vote.
3.4 In the absence of the 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
June 2014
committee member for purposes of maintaining a
committee quorum and to cast a tie-breaking vote of the
committee.
3.5 Minutes shall be kept and shall be the official
record of each meeting, including meetings by conference
call.
3.6 An electronic record of meetings may be made by
ICC-ES if deemed necessary; 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 the
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.
3.7 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 must be delivered to
ICC-ES and shall be considered nonconfidential and
available for discussion in open session of an Evaluation
Committee meeting. Such materials will be posted on the
ICC-ES web site (www.icc-es.org) prior to the meeting.
Comments and submissions not meeting the following
deadlines will not be considered at the meeting:
 Initial comments on agenda items shall be submitted
at least 28 days before the scheduled meeting.
 A rebuttal comment period shall follow, whereby
rebuttal comments to the initial comments may be
submitted by the proponent at least 21 days before
the scheduled meeting.
 Those planning on giving a visual presentation at the
meeting must submit their presentation, in PowerPoint
format only, at least 10 days before the scheduled
meeting.
Following the meeting, ICC-ES will make all materials
considered by the Evaluation Committee available on the
web site for a maximum period of one year following the
meeting. The committee reserves the right to refuse
recognition of communications which do not comply with
the provisions of this section.
4.0
CLOSED SESSIONS
Evaluation Committee meetings shall be open except
that the chairman may call for a closed session to seek
advice of counsel.
5.0
ACCEPTANCE CRITERIA
5.1 Acceptance criteria are established by the
committee to provide a basis for issuing ICC-ES
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ICC EVALUATION SERVICE, LLC, RULES OF PROCEDURE FOR THE EVALUATION COMMITTEE
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.
EXCEPTIONS: The following acceptance criteria are
controlled by the ICC-ES executive staff and are not
subject to committee approval:
 The Acceptance Criteria for Quality Documentation
(AC10)
 The Acceptance Criteria for Test Reports (AC85)
 The Acceptance Criteria
Inspection Agencies (AC304)
5.2
for
Inspections
and
Procedure:
5.2.1 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 4.0 of these rules.
5.2.2 Proposed acceptance criteria shall be
available to interested parties at least 30 days before
discussion at the committee meeting.
5.3 Approval of acceptance criteria shall be as
specified in Section 3.3 of these rules.
5.4 Actions of the Evaluation Committee may be
appealed in accordance with the ICC-ES Rules of
Procedure for Appeal of Acceptance Criteria or the ICCES Rules of Procedure for Appeals of Evaluation
Committee Technical Decisions.
6.0 COMMITTEE BALLOTING FOR ACCEPTANCE
CRITERIA
6.1 Acceptance criteria may be issued without a public
hearing following a 30-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.
3. Other acceptance criteria and/or the code provide
precedence for the revised criteria.
6.2 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.)
5.2.3 The committee shall be informed of all
pertinent written communications received by ICC-ES.
5.2.4 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. In the interest of fairness, each
person requesting to testify on a proposed acceptance
criteria or proposed changes to an existing acceptance
criteria will be given the same amount of time. The
following time limits are established:
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.)
a. For entities offering their first testimony on any
item, a 10-minute limit applies. This time limit
applies to both verbal testimony and/or visual
presentations.
b. Each person offering testimony may return to the
microphone for one five-minute period to offer
additional testimony and/or to rebut testimony
given by others.
d. The subject of the acceptance criteria needs to be
discussed in public hearings. The committee
member requests additional input from other
committee members, staff or industry.
c. Each person offering testimony on the staff
recommendation, on each criteria, is allowed one,
two-minute trip to the microphone.
Time limits do not include time needed to answer
questions from the staff and/or committee members. The
chairman–moderator shall have limited authority to modify
time limitations on testimony. The chairman–moderator
shall also have the authority to adjust time limits as
necessary in order to get through the hearing agenda.
Keeping of time for testimony by an individual will be
by an automatic timing device. The time remaining shall
be evident to the person testifying. Interruptions during
testimony will not be tolerated. It is the responsibility of the
chairman–moderator to maintain decorum and order
during all testimony.
June 2014
6.3 An Evaluation Committee member, in voting on an
acceptance criteria, may only cast the following ballots:
7.0
•
Approved
•
Approved with Comments
•
Negative: Do Not Proceed
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
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ICC EVALUATION SERVICE, LLC, RULES OF PROCEDURE FOR THE EVALUATION COMMITTEE
take place only in a public hearing of the Evaluation
Committee. Accordingly:
7.1 Committee members receiving an electronic ballot
should respond only to the sender (ICC-ES 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.
7.2 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 - June 2014
June 2014
Pg 3 of 3
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A Subsidiary of the International Code Council ®
PROPOSED REVISIONS TO THE ACCEPTANCE CRITERIA FOR JOIST
HANGERS AND SIMILAR DEVICES
AC13
Proposed April 2015
Previously approved October 2010, October 2006, October 2003
January 2003, January 2001
(Previously editorially revised December 2011)
PREFACE
Evaluation reports issued by ICC Evaluation Service, LLC (ICC-ES), are based upon performance features of
the International family of codes. (Some reports may also reference older code families such as the BOCA
National Codes, the Standard Codes, and the Uniform Codes.) Section 104.11 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.
ICC-ES may consider alternate criteria for report approval, provided the report applicant submits data
demonstrating that the alternate criteria are at least equivalent to the criteria set forth in this document, and
otherwise demonstrate compliance with the performance features of the codes. ICC-ES retains the right to refuse
to issue or renew any evaluation report, if the applicable product, material, or method of construction is such that
either unusual care with its installation or use must be exercised for satisfactory performance, or if
malfunctioning is apt to cause injury or unreasonable damage.
NOTE: The Preface for ICC-ES acceptance criteria was revised in July 2011 to reflect changes in policy.
Acceptance criteria are developed for use solely by ICC-ES for purposes of issuing ICC-ES evaluation reports.
PROPOSED REVISIONS TO THE ACCEPTANCE CRITERIA FOR JOIST
HANGERS AND SIMILAR DEVICES (AC13)
1.0
2.2.4 Test Reports: Test reports shall comply with
AC85. All test reports shall be prepared by an independent
testing laboratory in accordance with Section 4.2 of the
ICC-ES Rules of Procedure for Evaluation Reports. Test
reports shall include a complete description of devices
tested; the dimensions of the specimens; the number,
size, type, and method of installing fastenings; type of
failure; and such other data as may be pertinent.
INTRODUCTION
1.1 Purpose: The purpose of this criteria is to establish
requirements for ICC Evaluation Service, LLC (ICC-ES),
recognition of joist hangers, framing anchors and similar
®
devices under the 2015 International Building Code (IBC)
Sections 2303.5 and 2304.10.3 and the 2015 International
®
Residential Code (IRC) Section R104.11.
The reason for the development of this criteria is to
provide a guideline for the evaluation of joist hangers and
similar devices, since the 2015 IBC and IRC and
associated reference standards do not specify installation
and quality requirements for these products.
2.2.5 Sampling: Test specimens shall be sampled
in accordance with Section 3.0 of AC85.
3.0
3.1 General: Every device shall be rated for direct load
capacity under Allowable Stress Design (ASD) in
accordance with Section 3.2 or 3.3 of this criteria. Joist
hangers also shall be rated for torsional moment capacity
in accordance with Section 3.4 of this criteria.
1.2 Scope: The devices are used to support or attach
wood members, such as joists, rafters, purlins, beams,
girders, plates, posts, studs and headers, to wood, metal,
concrete or masonry. Attachment may be by means of
mechanical fastenings (nails, spikes, lag screws, wood
screws, bolts, etc.)
3.2 Direct Load Capacity Tests: The testing
procedure to establish direct load capacity shall be in
accordance with ASTM D7147. For devices not readily
adaptable to such assembly, an alternate assembly
producing comparable results may be used.
A “device,” as the word is used in this criteria, may
consist of one or more pieces or units so arranged as to
transfer load vertically or laterally, within safe limits, from
the end of a supported member (hereinafter referred to as
a “joist”) to a supporting member (hereinafter referred to
as a “header”).
3.3 Alternative Test
Capacity Testing:
1.3.1 2015 International
International Code Council.
Building
Code
1.3.2 2015 International Residential Code
International Code Council.
®
(IBC),
(IRC),
ε1
1.3.4 ASTM D1761-88(2000) , Test Methods for
Mechanical Fasteners in Wood, ASTM International.
1.3.5 ASTM D7147-05, Standard Specification for
Testing and Establishing Allowable Loads of Joist
Hangers, ASTM International.
BASIC INFORMATION AND TEST REPORTS
2.1 General:
submitted:
The
following
information
shall
for
Direct
Load
3.3.2 For devices seeking recognition under the
2015 IBC and IRC by using data from tests in accordance
with ASTM D1761 under the 2012, 2009 and 2006 IBC
and IRC, reanalysis and adjustment of allowable design
values shall be provided to demonstrate the equivalence
to the allowable design values derived in accordance with
the provisions outlined for direct load capacity in ASTM
D7147. The reanalysis shall take into consideration the
adjustments and limits of Sections 13 through 15 of ASTM
D7147.
1.3.3 2015 ANSI/AWC National Design Specification
for Wood Construction® (NDS) and Supplement,
American Wood Council.
2.0
Method
3.3.1 As an alternative to ASTM D7147, for devices
sought for recognition under the 2012, 2009, and 2006
IBC and IRC, ASTM D1761 is permitted for use to conduct
the direct load capacity testing and allowable load
determination in accordance with Appendix A.
1.3 Codes and Referenced Standards:
®
TEST AND PERFORMANCE REQUIREMENTS
3.4 Torsional Moment Capacity Test for Joist
Hangers:
be
3.4.1 The testing procedure for determining torsional
moment capacity for the joist hanger shall be in
accordance with ASTM D7147 or ASTM D1761. At least
three specimens of each size of device shall be tested.
Specimens shall be prepared and tested in a manner that
will show the torsional moment in inch-pounds required to
deflect either the top or bottom of the joist 0.125 inch (3.2
mm) from its initial position, provided the moment is
applied on the joist by rotating the joist at a distance of not
less than 12 inches (305 mm) from the device.
2.2 Product Description: Complete information
pertaining to components, material specifications, and
manufacturing processes. Materials shall comply with an
appropriate recognized national standard(s).
2.2.1 Installation Instructions: Installation details
and drawings, noting installation requirements and/or
limitations.
2.2.2 Identification: Description of the method of
identifying the product. Each device shall bear an imprint
which clearly identifies the manufacturer. A registered
trademark may serve as such identity. Labeling shall also
include the ICC-ES evaluation report number.
EXCEPTION: Hangers supporting glued-laminated
timber beams or hangers specifically designed to support
only prefabricated wood I-joists.
3.4.2 The torsional moment capacity rating of the
device shall be the average torsional load at which the
lateral movement of either the top or bottom of the joist
with respect to the original position of the joist is 0.125
2.2.3 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
PROPOSED REVISIONS TO THE ACCEPTANCE CRITERIA FOR JOIST HANGERS AND SIMILAR DEVICES (AC13)
5.2 Steel shall be corrosion-resistant or shall be
protected by galvanizing, electroplating, or with approved
steel primer.
inch (3.2 mm), such load to be the average for three or
more tests.
3.4.3 Every device supporting a joist shall have a
torsional moment capacity of not less than 75 pounds
(334 N) times the depth of the joist.
4.0
5.3 The device, after forming, shall evidence no
fracturing in either the protective coating or the base
metal.
ANALYSIS DETAILS
5.4 The radius of a 90-degree bend intended to fit the
corner of a joist or header shall be no greater than two
times the thickness of the steel.
4.1 Compression Perpendicular to Grain: When the
transfer of loads on the joist to the header is accomplished
primarily by means of compression perpendicular to grain
of the wood against the device, the allowable loads
specified in the NDS shall not be exceeded.
6.0
6.1 General: For factory-welded joist hangers and
similar devices, quality documentation and inspections
shall be in accordance with Section A6.2. For all other joist
hangers and similar devices, quality documentation and
inspections shall be in accordance with Section A6.3.
4.2 Fastener Values: When the transfer of loads on
the joist to the header is accomplished primarily by means
of fasteners in wood, the allowable strength of fasteners
specified in the NDS shall not be exceeded.
6.2 Factory-welded
Devices:
4.3 Multiple Devices: When more than one device is
used at a joint, the devices shall be capable of operating in
unison.
Joist
Hangers
and
Similar
6.2.1 Quality documentation complying with the
ICC-ES Acceptance Criteria for Quality Documentation
(AC10) shall be submitted for each facility manufacturing
or labeling products that are recognized in the ICC-ES
evaluation report.
4.4 Provision for Shrinkage: Dimensions of devices,
or methods of installation, shall make appropriate
provisions for shrinkage of joist relative to header.
4.5 Alternate Load Transfer Mechanisms: For
devices with load transfer mechanisms not recognized in
the NDS, including but not limited to barbs and cleats, the
applicant shall submit to ICC-ES for review and
concurrence prior to testing, a test and evaluation plan,
inclusive of principles of mechanics theory, testing
evidence, and evaluation criteria.
5.0
QUALITY CONTROL
6.2.2 A qualifying inspection shall be conducted at
each manufacturing facility when required by the ICC-ES
Acceptance Criteria for Inspections and Inspection
Agencies (AC304).
6.2.3 Third party follow-up inspections are required
under this acceptance criteria for factory-welded joist
hangers and similar devices.
MATERIALS AND WORKMANSHIP
6.3 Joist Hangers and Similar Devices Without
Welds:
Materials shall be of uniform quality and shall comply
with the provisions of each applicable code when
specified, otherwise material shall be limited to the
following:
6.3.1 Quality documentation complying with the
ICC-ES Acceptance Criteria for Quality Documentation
(AC10) shall be submitted for each facility manufacturing
or labeling products that are recognized in the ICC-ES
evaluation report.
5.1 Minimum thickness of steel shall be as follows:
Sheet—No. 18 gage, U.S. Standard Gage.
6.3.2 A qualifying inspection shall be conducted at
each manufacturing facility in accordance with the
requirements of the ICC-ES Acceptance Criteria for
Inspections and Inspection Agencies (AC304).
Wire—No. 18 gage, U.S. Steel Wire Gage.
EXCEPTION: Face-mounted joist hangers, supporting
2-by-4, 2-by-6, 2-by-8, and 2-by-10 wood joists or rafters,
may be fabricated from minimum No. 20 gage sheet steel
provided applicable sections of this criteria are complied
with.
6.3.3 An annual inspection shall be conducted at
each manufacturing facility in accordance with AC304.■
3
PROPOSED REVISIONS TO THE ACCEPTANCE CRITERIA FOR JOIST HANGERS AND SIMILAR DEVICES (AC13)
APPENDIX A
EVALUATIONS UNDER THE 2012, 2009, AND 2006 IBC AND IRC
A1.0 INTRODUCTION
A2.2.1 Installation Instructions: Installation details
and drawings, noting installation requirements and/or
limitations.
A1.1 Purpose: The purpose of this criteria is to
establish requirements for ICC Evaluation Service, LLC
(ICC-ES), recognition of joist hangers, framing anchors
and similar devices under Section 2303.5 of the 2012,
®
2009 and 2006 International Building Code (IBC), and
Section R104.11 of the 2012, 2009 and 2006 International
®
®
Residential Code (IRC). Section 2312 of the BOCA
National Building Code/1999 (BNBC), Section 1707.3 of
©
the 1999 Standard Building Code (SBC) and Sections
2304.3, 2304.4.2, and 2318.4 of the 1997 Uniform Building
Code™ (UBC).
A2.2.2 Identification: Description of the method of
identifying the product. Each device shall bear an imprint
which clearly identifies the manufacturer. A registered
trademark may serve as such identity. Labeling shall also
include the ICC-ES evaluation report number.
A2.2.3 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.
The reason for the development of this criteria is to
provide a guideline for the evaluation of joist hangers and
similar devices, since the IBC and IRC, BNBC, SBC, UBC
and associated reference standards do not specify
installation and quality requirements for these products.
A2.2.4 Test Reports: Test reports shall comply with
AC85. All test reports shall be prepared by an independent
testing laboratory in accordance with Section 4.2 of the
ICC-ES Rules of Procedure for Evaluation Reports. Test
reports shall include a complete description of devices
tested; the dimensions of the specimens; the number,
size, type, and method of installing fastenings; type of
failure; and such other data as may be pertinent.
A1.2 Scope: The devices are used to support or
attach wood members, such as joists, rafters, purlins,
beams, girders, plates, posts, studs and headers, to wood,
metal, concrete or masonry. Attachment may be by means
of mechanical fastenings (nails, spikes, lag screws, wood
screws, bolts, etc.)
A2.2.5 Sampling: Test specimens shall be sampled
in accordance with Section 3.0 of AC85.
A3.0 TEST AND PERFORMANCE REQUIREMENTS
A “device,” as the word is used in this criteria, may
consist of one or more pieces or units so arranged as to
transfer load vertically or laterally, within safe limits, from
the end of a supported member (hereinafter referred to as
a “joist”) to a supporting member (hereinafter referred to
as a “header”).
A1.3
A3.1 General: Every device shall be rated for direct
(vertical) capacity under Allowable Stress Design (ASD) in
accordance with Section A3.2 or A3.3 of this criteria. Joist
hangers also shall be rated for torsional moment capacity
in accordance with Section A3.4 of this criteria.
A3.2 Direct (Vertical) Load Capacity Tests: The
testing procedure to establish direct load capacity shall be
in accordance with ASTM D 1761 and conform to the
following provisions:
Codes and Referenced Standards:
A1.3.1 2012, 2009 and 2006 International Building
®
Code (IBC), International Code Council.
A1.3.2 2012,
2009
and
2006
International
®
Residential Code (IRC), International Code Council.
A3.2.1 A minimum of three test specimens for each
size of device shall be tested. If the ultimate load for any
one of the test specimens varies more than 20 percent
from the average, three additional tests shall be
conducted.
®
A1.3.3 BOCA National Building Code/1999 (BNBC).
©
A1.3.4 1999 Standard Building Code (SBC).
A1.3.5 1997 Uniform Building Code™ (UBC).
A3.2.2 A test specimen shall consist of an assembly
of a joist and two headers of appropriate size fastened
together by a device to be tested, as illustrated in Figure 7
of ASTM D 1761. The minimum length for joists and
headers shall be 18 inches (457 mm). The joist length
need not exceed 24 inches (610 mm). Headers shall have
a length sufficient to provide the intended hanger-toheader contact for the hanger, that is, space for nailing
and bearing as applicable.
A1.3.3 A1.3.6
ANSI/AF&PA
National
Design
Specification for Wood Construction (NDS) and
Supplement, American Forest & Paper Association. (Refer
to Table A1 of this acceptance criteria for edition date.)
ε1
A1.3.4 A1.3.7
ASTM D1761-88(2000) , Test
Methods for Mechanical Fasteners in Wood, ASTM
International.
A1.3.5 A1.3.8
ASTM
D7147-05,
Standard
Specification for Testing and Establishing Allowable Loads
of Joist Hangers, ASTM International.
For devices not readily adaptable to such assembly,
an alternate assembly producing comparable results may
be used.
A2.0 BASIC INFORMATION AND TEST REPORTS
A3.2.3 The species of lumber used shall have a
specific gravity not greater than 0.55 as determined in
accordance with the NDS.
A2.1 General: The following information shall be
submitted:
A3.2.4 The moisture content at time of test shall be
greater than 11 percent.
A2.2 Product Description: Complete information
pertaining to components, material specifications, and
manufacturing processes. Materials shall comply with an
appropriate recognized national standard(s).
A3.2.5 `A specimen, when inserted in the testing
machine, shall have the top of the joist level, and the sides
4
PROPOSED REVISIONS TO THE ACCEPTANCE CRITERIA FOR JOIST HANGERS AND SIMILAR DEVICES (AC13)
vertical. Except for the restraint provided by the device,
the joist shall be unrestricted for vertical movement.
manner that will show the torsional moment in inchpounds required to deflect either the top or bottom of the
joist 0.125 inch (3.2 mm) from its initial position, provided
the moment is applied by rotating the joist at a distance of
not less than 12 inches (305 mm) from the device.
A3.2.6 A dial gauge reading to 0.001 inch (0.0254
mm) shall be used for the measurement of vertical
movement of the joist with respect to the headers.
EXCEPTION: Hangers supporting glued-laminated
beams or hangers specifically designed to support only
prefabricated wood I-joists.
A3.2.7 An initial load, ranging from 5 to 20 percent of
ultimate load, shall be applied to the joist to seat the test
assembly. This load shall then be removed and the
gauges shall be set to zero and so recorded, with the
amount of the initial load.
A3.4.2 The torsional moment capacity rating of the
device shall be the average torsional load at which the
lateral movement of the top or bottom of the joist with
respect to the original position of the joist is 0.125 inch
(3.2 mm), such load to be the average for three or more
tests.
A3.2.8 Load shall be applied at either a uniform
crosshead rate between 0.03 to 0.10 inch (0.8 to 2.5 mm)
per minute, or at a rate of loading which will result from
approximately this machine head speed. The rate of
loading shall be reported with the test data.
A3.4.3 Every device supporting a joist shall have a
torsional moment capacity of not less than 75 pounds
(334 N) times the depth of the joist. Any device supporting
roof joists having one end twisted more than one-half of
one degree per foot length relative to the other end (such
as in framing a breached bay between a bowstring truss
and a wall) shall have a torsional moment capacity of 200
pounds (890 N) times the depth of the joist, unless other
means (such as solid blocking, etc.) are provided to satisfy
this requirement.
A3.2.9 Both load and gauge readings shall be
recorded at appropriate intervals of load.
A3.2.10 Test results may be presented in tabular form
or by means of a graph.
A3.2.11 For compliance with the applicable code,
each device shall be rated for direct load (vertical)
capacity at the lowest value determined from the following:
A3.2.11.1 The allowable vertical load for a normal
duration of loading of the joist hanger or similar device
shall be the lowest value determined from tests using the
criteria given in Sections A3.2.11.1.1 through A3.2.11.1.3.
A4.0 ANALYSIS DETAILS
A4.1 Compression Perpendicular to Grain: When
the transfer of loads on the joist to the header is
accomplished primarily by means of compression
perpendicular to grain of the wood against the device, the
allowable loads specified in the NDS shall not be
exceeded.
A3.2.11.1.1 The lowest ultimate vertical load for a
single device from any test divided by 3 (where three tests
are conducted and each ultimate vertical load does not
vary more than 20 percent from the average ultimate
vertical load).
A4.2 Fastener Values: When the transfer of loads on
the joist to the header is accomplished primarily by means
of fasteners in wood, the allowable strength of fasteners
specified in the NDS shall not be exceeded.
A3.2.11.1.2 The average ultimate vertical load for a
single device from all tests divided by 3 (where six or more
tests are conducted).
A3.2.11.1.3 The average from all the tests of the
vertical load that produces a vertical movement of the joist
with respect to the header of 0.125 inch (3.2 mm).
A4.3 Multiple Devices: When more than one device is
used at a joint, the devices shall be capable of operating in
unison.
A3.2.11.2 The device shall have a direct load
capacity rating no greater than calculated in accordance
with the NDS for nails or other fasteners utilized to attach
the joist hanger or similar device to the wood members
and allowable bearing loads that contribute to the capacity
of the hanger.
A4.4 Provision for Shrinkage: Dimensions of
devices, or methods of installation, shall make appropriate
provisions for shrinkage of joist relative to header.
A4.5 Design Value Modifications for Joist Hangers
or Similar Devices: Allowable design values for joist
hangers or similar devices that are determined by
calculation (Sections A3.2.11.2 and A3.2.11.3) shall be
permitted to be modified by the appropriate duration of
loading factors as specified in the NDS, except when
limited by a test-based design value. Allowable design
values determined by test results (Section A3.2.11.1) shall
not be modified by duration of load factors.
A3.2.11.3 The device shall have a direct load
capacity rating no greater than the allowable design load
determined in accordance with the NDS for the wood
members forming the connection.
A3.3 Alternative Test Method for Direct (Vertical)
Load Capacity Testing: As an alternative to ASTM D
1761, the provisions of ASTM D 7147 may be followed to
establish direct load capacity, provided that analysis of
test data and derivation of allowable loads are in
accordance with Sections 13, 14 and 15 of ASTM D 7147.
A5.0 MATERIALS AND WORKMANSHIP
Materials shall be of uniform quality and shall comply
with the provisions of each applicable code when
specified, otherwise material shall be limited to the
following:
A3.4 Torsional Moment Capacity Test for Joist
Hangers:
A5.1
A3.4.1 The torsional moment capacity for the joist
hanger shall be determined in accordance with ASTM D
1761. At least three specimens of each size of device shall
be tested. Specimens shall be prepared and tested in a
Minimum thickness of steel shall be as follows:
Sheet—No. 18 gage, U.S. Standard Gage.
Wire—No. 18 gage, U.S. Steel Wire Gage.
5
PROPOSED REVISIONS TO THE ACCEPTANCE CRITERIA FOR JOIST HANGERS AND SIMILAR DEVICES (AC13)
EXCEPTION: Face-mounted joist hangers, supporting 2by-4, 2-by-6, 2-by-8, and 2-by-10 wood joists or rafters,
may be fabricated from minimum No. 20 gage sheet steel
provided applicable sections of this criteria are complied
with.
(AC10) shall be submitted for each facility manufacturing
or labeling products that are recognized in the ICC-ES
evaluation report.
A6.2.2 A qualifying inspection shall be conducted at
each manufacturing facility when required by the ICC-ES
Acceptance Criteria for Inspections and Inspection
Agencies (AC304).
A5.2 Steel shall be corrosion-resistant or shall be
protected by galvanizing, electroplating, or with approved
steel primer.
A6.2.3 Third party follow-up inspections are required
under this acceptance criteria for factory-welded joist
hangers and similar devices.
A5.3 The device, after forming, shall evidence no
fracturing in either the protective coating or the base
metal.
A6.3 Joist Hangers and Similar Devices Without
Welds:
A5.4 The radius of a 90-degree bend intended to fit the
corner of a joist or header shall be no greater than two
times the thickness of the steel.
A6.3.1 Quality documentation complying with the
ICC-ES Acceptance Criteria for Quality Documentation
(AC10) shall be submitted for each facility manufacturing
or labeling products that are recognized in the ICC-ES
evaluation report.
A6.0 QUALITY CONTROL
A6.1 General: For factory-welded joist hangers and
similar devices, quality documentation and inspections
shall be in accordance with Section A6.2. For all other joist
hangers and similar devices, quality documentation and
inspections shall be in accordance with Section A6.3.
A6.3.2 A qualifying inspection shall be conducted at
each manufacturing facility in accordance with the
requirements of the ICC-ES Acceptance Criteria for
Inspections and Inspection Agencies (AC304).
A6.2 Factory-welded Joist Hangers and Similar
Devices:
A6.3.3 An annual inspection shall be conducted at
each manufacturing facility in accordance with AC304.■
A6.2.1 Quality documentation complying with the
ICC-ES Acceptance Criteria for Quality Documentation
TABLE A1—REFERENCED STANDARDS
DATE OF STANDARD
STANDARD
2012 IBC
2009
and 2006
IBC
ANSI/AF&PA National
Design Specification for
Wood Construction (NDS)
and Supplement
2012
2005
2012 IRC
2009
and 2006
IRC
BNBC/1999
1999 SBC
1997 UBC
2012
2005
1997
1997
1991 (revised)
6