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					                       INTRODUCTORY COMMENTS
Preface                                               Manufacturer-Supplied Information
      This Handbook is a guide for those ap-                Information about the home must be pro-
proving manufactured homes on permanent               vided by the manufacturer. To simplify the ap-
foundations -- HUD Field Offices involved in          proval process, the manufacturer may wish to
the approval process and manufacturers and            prepare a Manufacturer's Worksheet for each
site owners who are seeking approval.                 standard foundation system. The Manufactur-
                                                      er's Worksheet is in Appendix E.
       There are two acceptable methods for
owners or developers to use in seeking HUD
                                                      Owner-Supplied Information
Approval: (1) Furnish foundation drawings and
design calculations prepared and sealed by a                Information about the building site must
licensed professional for foundation concepts         be provided by the owner. The size of the
shown in Appendix A and other foundation              foundation, the depth of the footings, and the
concepts not covered in the Handbook. The             anchorage requirements depends on the build-
design criteria and requirements of Chapters          ing's site. This information should be submit-
1-7 of the Handbook shall be followed in              ted on the Owner’s Site Acceptance Worksheet
Method (1) and does not require the submittal         (Appendix E).
of Appendix F (Appendix F instructions in par-
agraph 103 do not apply to Method 1.) Or (2)          Handbook: Site Conditions
Furnish the Design Worksheet (Appendix F)
prepared by a licensed professional in accord-               Chapters 2 and 3 of the Handbook con-
ance with the Handbook. Method (2) does not           tain recommendations for site preparation.
require design calculations. Methods (1) & (2)        They also point out unusual site conditions that
both require submittals of Appendix E. See Ta-        may call for additional geotechnical engineer-
ble i - 1 on page ii.                                 ing reports, such as sloping sites and problem
                                                      soils. This documentation must also be submit-
      The Foundation Concepts (Appendix A)            ted if problem sites are found.
are considered permanent foundations. Perma-
nent foundations are those that have been engi-
                                                      Handbook: Foundation Design Concepts
neered for safety and long-term satisfactory
performance. These foundations were also de-                Companies building manufactured homes
signed specifically for use with manufactured         have assisted in the preparation of this hand-
homes. The Handbook contains construction             book by providing foundation design concepts
recommendations that assure the home, the             appropriate for manufactured housing. This
foundation and the site are all compatible. Be-       information was assembled and used as the ba-
cause these recommendations are based on es-          sis for the Foundation Design Concepts in Ap-
timated conditions, it is important to have           pendix A.
complete information for each manufactured
home and its site.


                                                  i
      The Handbook provides information                 ries of logical steps designated to lead to ap-
about three basic foundation types and six al-          proval. The HUD Field Office at their preroga-
ternative types. Appendix A shows which                 tive may review the Design Worksheet.
foundation designs can be used on sites with
special requirements, such as windy sites.                    Technical assistance to determine accept-
                                                        ability of individual designs of permanent
                                                        foundation systems should be obtained from a
Handbook: Design Verification
                                                        licensed professional engineer.
      The Handbook's format is arranged for a
licensed professional to progress through a se-


            TITLE                           Method (1)                           Method (2)

 Foundation Drawings (Pre-                        Yes                                No
 pared & Sealed by Licensed
        Professional)

  Design Calculations (Pre-                       Yes                                No
  pared & Sealed by Licensed
         Professional)

Design Criteria          Chap-                    Yes                                Yes
           ters 1-7

   Appendix A - Foundation                        Yes                                Yes
         Concepts

  Other Foundation Concepts                       Yes                                No

 Appendix E              (Own-                    Yes                                Yes
er’s Site Acceptability & Manu-
     facturer’s Worksheets)

Appendix F                De-                     No                                 Yes
sign Worksheet      (Prepared
 & Sealed by Licensed Profes-
           sional)

                                             Table i - 1




                                                   ii

				
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posted:6/11/2012
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