**DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT STRUCTURAL ENGINEERING**

## Housing - Federal Housing Commissioner BULLETIN NO. 

###  

#  TO: DIRECTORS, SINGLE FAMILY HOCs ISSUE DATE 

#  DIRECTORS, MULTIFAMILY HUBs

#  

#### REVIEW DATE

#  

##### 

##### SUBJECT: 1. Item Description 

2.  **Name and address**

> **of Manufacturer**
>
> > This Structural Engineering Bulletin (SEB) should be filed with
> > other SEBs and related Bulletins on materials or products as
> > required by prescribed procedures.
>
> 1\. General:

This Bulletin sets forth specific requirements under the Technical
Suitability of Products Program for determining the eligibility of
housing to be constructed under HUD mortgage insurance, or other HUD
housing programs.

> 2\. Scope:
>
> This Bulletin applies only to the structural features of this method
> of construction. Final determination of eligibility is made by the
> appropriate HUD Field Office. Other factors considered by the Field
> Office will be valuation, location, architectural planning and appeal,
> mechanical equipment, thermal characteristics, and market acceptance.
> Consideration is also necessary to determine whether a specific
> property will qualify under the specific HUD program, when constructed
> according to the method outlined in this Bulletin, and where the
> structure is to be located.

3\. Minimum Property Standards (MPS):

Compliance with HUD MPS will be determined by the HUD Field Office or
Homeownership Center on the same basis as submissions involving
conventional construction, except for the special features described in
this Bulletin.

4\. Inspection:

Field compliance inspections covering conventional items of construction
and any special features covered in this Bulletin shall be made in
accordance with prescribed procedures.

The appropriate HUD Field Office or Homeownership Center shall furnish a
copy of a HUD field inspection report to Headquarters, FHA Standards,
Office of Manufactured Housing Programs, when there is:

a.  Evidence of noncompliance with portions of the system of
    construction described in this Bulletin.

b.  Faulty shop fabrication, including significant surface defects.

c.  Damage to shop fabricated items or materials due to improper
    transportation, storage, handling or assembly.

d.  Unsatisfactory field workmanship or performance of the product or
    system.

e.  Any significant degradation or deterioration of the product or
    evidence of lack of durability or performance.

Periodic plant inspections will be made by HUD Field Office,
Homeownership Center, State Agency personnel, or a HUD designated
representative in accordance with their prescribed procedures. Factory
inspection reports shall be submitted to HUD Headquarters, upon request.

5\. Certification:

The manufacturer named in this Bulletin shall furnish the builder with a
written certification stating that the product has been manufactured in
compliance with the HUD Minimum Property Standards (MPS), except as
modified by this Bulletin. The Builder shall endorse the certification
with a statement that the product has been erected in compliance with
the HUD MPS except as modified by this Bulletin, and that the
manufacturer\'s certification does not relieve the Builder, in any way,
of responsibility under the terms of the Builder\'s Warranty required by
the National Housing Act, or under any provisions applicable to any
other housing program. This certification shall be furnished to the HUD
Field Office upon completion of the property.

[OUTLINE DESCRIPTION, CATEGORY II CONSTRUCTION]{.underline}

[GENERAL:]{.underline}

This bulletin provides for the use of SSI wood I-joists, manufactured by
Standard Structures Inc. (SSI) for floor and roof framing.

[PRODUCT DESCRIPTION]{.underline}

SSI joists consist of laminated veneer lumber (LVL) or machine stress
rated (MSR) lumber flanges and oriented strand board (OSB) webs. The
webs are 4-foot long sections of OSB that are glued end to end to form a
continuous web using a full thickness joint. The web-to-flange
connection is made by gluing the web into a groove in the center of the
flange face.

Flange stock used to fabricate SSI joists is LVL or MSR lumber of the
grade required by the approved SSI *Joist Procedures And Quality Control
Manual*. Webs are structural use panels that comply with Department of
Commerce (DOC) Voluntary Product Standard PS-2. Exterior-type adhesives,
complying with ASTM D 2559, are used for flange-flange, flange-web, and
web-web joints.

Descriptive details for the various joist series are provided in Table
1.

# TABLE 1

# JOIST DESCRIPTION

<table>
<colgroup>
<col style="width: 16%" />
<col style="width: 10%" />
<col style="width: 11%" />
<col style="width: 11%" />
<col style="width: 5%" />
<col style="width: 6%" />
<col style="width: 7%" />
<col style="width: 6%" />
<col style="width: 9%" />
<col style="width: 14%" />
</colgroup>
<tbody>
<tr class="odd">
<td rowspan="2"><strong>JOIST SERIES</strong></td>
<td colspan="2"><strong>JOIST DEPTHS (in.)</strong></td>
<td colspan="5"><h3 id="flange">FLANGE</h3></td>
<td colspan="2"><h2 id="web">WEB</h2></td>
</tr>
<tr class="even">
<td><strong>Minimum</strong></td>
<td><strong>Maximum</strong></td>
<td><strong>Material</strong></td>
<td><p><strong>F<sub>t</sub></strong></p>
<p><strong>(psi)</strong></p></td>
<td><p><strong>E</strong></p>
<p><strong>(x10<sup>6</sup>)</strong></p></td>
<td><p><strong>Width</strong></p>
<p><strong>(in.)</strong></p></td>
<td><p><strong>Depth</strong></p>
<p><strong>(in.)</strong></p></td>
<td><strong>Material</strong></td>
<td><p><strong>Thickness</strong></p>
<p><strong>(in.)</strong></p></td>
</tr>
<tr class="odd">
<td>SSI 350M</td>
<td>9¼</td>
<td>30</td>
<td>2400 MSR</td>
<td>1925</td>
<td>2.0</td>
<td>3</td>
<td>2</td>
<td>OSB</td>
<td>3/8"</td>
</tr>
<tr class="even">
<td>SSI 350Me</td>
<td>9¼</td>
<td>30</td>
<td>2100 MSR</td>
<td>1575</td>
<td>1.8</td>
<td>3</td>
<td>2</td>
<td>OSB</td>
<td>3/8"</td>
</tr>
<tr class="odd">
<td>SSI 550M</td>
<td>9¼</td>
<td>30</td>
<td>2400 MSR</td>
<td>1925</td>
<td>2.0</td>
<td>4</td>
<td>2</td>
<td>OSB</td>
<td>3/8"</td>
</tr>
<tr class="even">
<td>SSI 550Me</td>
<td>9¼</td>
<td>30</td>
<td>2100 MSR</td>
<td>1575</td>
<td>1.8</td>
<td>4</td>
<td>2</td>
<td>OSB</td>
<td>3/8"</td>
</tr>
</tbody>
</table>

SSI joists are manufactured to meet the requirements of the SS*I Joist
Procedures and Quality Control Manual.* SSI joists are identified by a
stamp indicating the product designation, the number of this bulletin
(HUD 1133) the manufacturer's name (Standard Structures Inc.) or logo,
the plant number (1022), production date, and the name or logo of the
quality control agency (APA EWS).

Typical SSI Joist Identification Markings:

[DESIGN]{.underline}:

Design shall be in accordance with HUD MPS, local building codes,
allowable design properties provided in Table 2, and the requirements of
the Standard Structures Inc. *User's Guide*. The joists shall be
installed as single-span joists with a minimum bearing length of 2½\"
except a minimum bearing length of 1¾\" is permitted for SSI 350M and
350Me joists.

**TABLE 2**

**DESIGN PROPERTIES^(1)^**

+---------+---------+---+----------+-------------------+--------+---------+
| **      | **JOIST |   | **E      | **M^(3)^          | **V^   | **C     |
| JOIST** | S       |   | I^(2)^** | (ft-lbs)**        | (4)^** | ^(5)^** |
|         | ERIES** |   |          |                   |        |         |
| **      |         |   | **(x     |                   | **(    | *       |
| DEPTH** |         |   | 10^6^    |                   | lbs)** | *(10^6^ |
|         |         |   | lb-      |                   |        | lbs)**  |
|         |         |   | in^2^)** |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
| 9¼      | SSI     |   | 256      | 3950              | 1470   | 5.26    |
|         | 350M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 231      | 3230              | 1470   | 5.26    |
|         | 350Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 355      | 5533              | 1470   | 5.34    |
|         | 550M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 320      | 4526              | 1470   | 5.34    |
|         | 550Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
| 9½      | SSI     |   | 272      | 4088              | 1500   | 5.39    |
|         | 350M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 245      | 3344              | 1500   | 5.39    |
|         | 350Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 379      | 5730              | 1500   | 5.47    |
|         | 550M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 341      | 4687              | 1500   | 5.47    |
|         | 550Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
| 10      | SSI     |   | 307      | 4367              | 1555   | 5.64    |
|         | 350M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 276      | 3572              | 1555   | 5.64    |
|         | 350Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 426      | 6126              | 1555   | 5.72    |
|         | 550M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 384      | 5010              | 1555   | 5.72    |
|         | 550Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
| 11¼     | SSI     |   | 403      | 5066              | 1690   | 6.28    |
|         | 350M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 362      | 4143              | 1690   | 6.28    |
|         | 350Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 559      | 7118              | 1690   | 6.36    |
|         | 550M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 503      | 5799              | 1690   | 6.36    |
|         | 550Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
| 11½     | SSI     |   | 423      | 5206              | 1720   | 6.41    |
|         | 350M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 380      | 4258              | 1720   | 6.41    |
|         | 350Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 588      | 7317              | 1720   | 6.49    |
|         | 550M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 529      | 5984              | 1720   | 6.49    |
|         | 550Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
| 11⅞     | SSI     |   | 455      | 5417              | 1760   | 6.60    |
|         | 350M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 410      | 4430              | 1760   | 6.60    |
|         | 350Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 633      | 7616              | 1760   | 6.69    |
|         | 550M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 569      | 6229              | 1760   | 6.69    |
|         | 550Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
| 12      | SSI     |   | 466      | 5487              | 1775   | 6.67    |
|         | 350M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 420      | 4488              | 1775   | 6.67    |
|         | 350Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 648      | 7716              | 1775   | 6.75    |
|         | 550M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 583      | 6311              | 1775   | 6.75    |
|         | 550Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
| 14      | SSI     |   | 659      | 6614              | 1995   | 7.71    |
|         | 350M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 593      | 5410              | 1995   | 7.71    |
|         | 350Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 916      | 9316              | 1995   | 7.81    |
|         | 550M    |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     |   | 825      | 7619              | 1995   | 7.81    |
|         | 550Me   |   |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
| 16      | SSI     | 8 |          | 7745              | 2215   | 8.77    |
|         | 350M    | 8 |          |                   |        |         |
|         |         | 8 |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     | 7 |          | 6335              | 2215   | 8.77    |
|         | 350Me   | 9 |          |                   |        |         |
|         |         | 9 |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     | 1 |          | 10921             | 2215   | 8.88    |
|         | 550M    | 2 |          |                   |        |         |
|         |         | 3 |          |                   |        |         |
|         |         | 4 |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     | 1 |          | 8933              | 2215   | 8.88    |
|         | 550Me   | 1 |          |                   |        |         |
|         |         | 1 |          |                   |        |         |
|         |         | 0 |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
| 18      | SSI     | 1 |          | 8879              | 2440   | 9.84    |
|         | 350M    | 1 |          |                   |        |         |
|         |         | 5 |          |                   |        |         |
|         |         | 2 |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     | 1 |          | 7262              | 2440   | 9.84    |
|         | 350Me   | 0 |          |                   |        |         |
|         |         | 3 |          |                   |        |         |
|         |         | 6 |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     | 1 |          | 12533             | 2440   | 9.95    |
|         | 550M    | 5 |          |                   |        |         |
|         |         | 9 |          |                   |        |         |
|         |         | 9 |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     | 1 |          | 10250             | 2440   | 9.95    |
|         | 550Me   | 4 |          |                   |        |         |
|         |         | 3 |          |                   |        |         |
|         |         | 9 |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
| 20      | SSI     | 1 |          | 10015             | 2660   | 10.91   |
|         | 350M    | 4 |          |                   |        |         |
|         |         | 5 |          |                   |        |         |
|         |         | 2 |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     | 1 |          | 8191              | 2660   | 10.91   |
|         | 350Me   | 3 |          |                   |        |         |
|         |         | 0 |          |                   |        |         |
|         |         | 6 |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     | 2 |          | 14146             | 2660   | 11.04   |
|         | 550M    | 0 |          |                   |        |         |
|         |         | 1 |          |                   |        |         |
|         |         | 3 |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+
|         | SSI     | 1 |          | 11570             | 2660   | 11.04   |
|         | 550Me   | 8 |          |                   |        |         |
|         |         | 1 |          |                   |        |         |
|         |         | 2 |          |                   |        |         |
+---------+---------+---+----------+-------------------+--------+---------+

**TABLE 2 (Continued)**

**DESIGN PROPERTIES^(1)^**

  ---------- ---------- ----------- -------------------- -------- ----------
  22         SSI 350M   1788        11153                2880     11.99

             SSI 350Me  1609        9122                 2880     11.99

             SSI 550M   2478        15761                2880     12.12

             SSI 550Me  2230        12891                2880     12.12

  24         SSI 350M   2163        12291                3100     13.06

             SSI 350Me  1946        10052                3100     13.06

             SSI 550M   2992        17378                3100     13.20

             SSI 550Me  2693        14213                3100     13.20

  26         SSI 350M   2574        13429                3320     14.14

             SSI 350Me  2317        10984                3320     14.14

             SSI 550M   3558        18997                3320     14.29

             SSI 550Me  3202        15537                3320     14.29

  28         SSI 350M   3024        14570                3545     15.21

             SSI 350Me  2721        11917                3545     15.21

             SSI 550M   4175        20616                3545     15.38

             SSI 550Me  3757        16862                3545     15.38

  30         SSI 350M   3513        15710                3765     16.29

             SSI 350Me  3162        12849                3765     16.29

             SSI 550M   4844        22236                3765     16.46

             SSI 550Me  4359        18187                3765     16.46
  ---------- ---------- ----------- -------------------- -------- ----------

Notes to Table 2:

1.  The tabulated values are design values for normal duration of load.
    All values, except for EI and C may be adjusted for other load
    duration as permitted by the code.

2.  Bending stiffness (EI) of the I-joist.

3.  Moment capacity (M) of the I-joist. For repetitive I-joist, the
    tabulated values may be increased by a factor of 1.07.

4.  Shear capacity (V) of the I-joist.

5.  Coefficient of shear deflection (C). For calculating uniform load
    and center point load deflections of an I-joist in a simple-span
    application, use Equations 1 and 2.

Deflection formula:

Uniform Load: δ = (5wl^4^/384EI) + (wl^2^/C) (Equation 1)

Center Point Load: δ = (Pl^3^/48EI) + (2Pl/C) (Equation 2)

Where: δ = calculated deflection (inches)

> W = uniform load (pounds per lineal inch)
>
> l = design span (inches)
>
> P = concentrated load (pounds)
>
> EI = bending stiffness of the I-joist (lbs-in^2^)
>
> C = coefficient of shear deflection (pounds)

[INSTALLATION]{.underline}:

SSI joists shall be limited to protected, dry conditions of use. Joist
installation, including cutting to provide access holes for air ducts,
plumbing, and wiring, shall be in accordance with HUD MPS, local
building codes, and the details provided in the Standard Structures Inc.
*User's Guide*.

[MANUFACTURING PLANT(S):]{.underline}

Components covered under this Bulletin will be produced in the following
plant(s):

Standard Structures Inc.

5900 Pruitt Avenue

Windsor, CA 95492

The appropriate HUD Field Office or Homeownership Center in whose
jurisdiction the manufacturing plant is located, or HUD designated
representative will inspect this plant in accordance with prescribed
procedures.

[QUALITY CONTROL:]{.underline}

The appropriate HUD Field Office or Homeownership Center in whose
jurisdiction the manufacturing plant is located, or the State Agency (in
Category III states) shall review and approve plant fabrication
procedures and quality control program, to ensure compliance with
approved plans and specifications. The quality control program shall
include field erection or supervision by Standard Structures Inc.

SSI Joists are fabricated, inspected and tested per ASTM D-5055 and
provisions of a Quality Control and Procedures Manual recognized by ICC
ES and APA -- The Engineered Wood Association.

The SSI Joist Quality Control program is audited and plant inspected, by
American Plywood Association -- The Engineered Wood Association (NER
QA-397, AA-649). Audits are conducted 12 times per year.

[RECORD OF PROPERTIES:]{.underline}

The manufacturer shall provide HUD a list of the first ten properties in
which the component or system described in this Bulletin is used. The
list shall include the complete address, or description of location, and
approximate date of installation or erection. Failure of the
manufacturer to provide HUD with the above information may result in
cancellation of this Bulletin.

[NOTICE OF CHANGES:]{.underline}

The manufacturer shall inform HUD in advance of changes in production
facilities, transportation, field erection procedures, design, or
materials used in this product. Further, the manufacturer must inform
HUD of any revision to corporate structure, change of address or change
in name or affiliation of the prime manufacturer. Failure of the
manufacturer to notify HUD of any of the above changes may result in
cancellation of this Bulletin.

[EVALUATION:]{.underline}

This SEB is valid for a period of three years from the date of initial
issuance or most recent renewal or revision, whichever is later. The
holder of this SEB shall apply for a renewal or revision 90 days prior
to the Review Date printed on this SEB. Submittals for renewal or
revision shall be sent to:

U. S. Department of Housing and Urban Development

FHA Standards, Office of Manufactured Housing Programs

451 Seventh Street, SW, Room 9168

Washington, DC 20410-800

Appropriate User Fee shall be sent to:

U. S. Department of Housing and Urban Development

Miscellaneous Income -- Technical Suitability of Products Fees

Bank of America

P. O. Box 198762

Atlanta, GA 30384-8762

The holder of this SEB may apply for revision at any time prior to the
Review Date. Minor revisions may be in the form a supplement.

If the Department determines that a proposed renewal or supplement
constitutes a revision, the appropriate User Fee for a revision will
need to be submitted in accordance with Code of Federal Regulations 24
CFR 200.934, \"User Fee System for the Technical Suitability of Products
Program\", and current User Fee Schedule.

[CANCELLATION:]{.underline}

Failure to apply for a renewal or revision shall constitute a basis for
cancellation of the SEB. HUD will notify the manufacturer that the SEB
may be canceled when:

1.  conditions under which the document was issued have changed so as to
    affect production of, or to compromise the integrity of the accepted
    material, product, or system,

2.  the manufacturer has changed its organizational form without
    notifying HUD, or

3.  the manufacturer has not complied with responsibilities it assumed
    as a condition of HUD\'s acceptance.

However, before cancellation, HUD will give the manufacturer a written
notice of the specific reasons for cancellation, and the opportunity to
present views on why the SEB should not be canceled. No refund of fees
will be made on a canceled document.

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This Structural Engineering Bulletin is issued solely for the captioned
firm and is not transferable to any person or successor entity.

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