Z240.10.1-08

(reaffirmed 2013)

Site preparation, foundation, and anchorage of manufactured homes

Legal Notice for Standards

Canadian Standards Association (CSA) standards are developed through a consensus standards development process approved by the Standards Council of Canada. This process brings together volunteers representing varied viewpoints and interests to achieve consensus and develop a standard. Although CSA administers the process and establishes rules to promote fairness in achieving consensus, it does not independently test, evaluate, or verify the content of standards.

Disclaimer and exclusion of liability

This document is provided without any representations, warranties, or conditions of any kind, express or implied, including, without limitation, implied warranties or conditions concerning this document’s fitness for a particular purpose or use, its merchantability, or its non-infringement of any third party’s intellectual property rights. CSA does not warrant the accuracy, completeness, or currency of any of the information published in this document. CSA makes no representations or warranties regarding this document’s compliance with any applicable statute, rule, or regulation.

IN NO EVENT SHALL CSA, ITS VOLUNTEERS, MEMBERS, SUBSIDIARIES, OR AFFILIATED COMPANIES, OR THEIR EMPLOYEES, DIRECTORS, OR OFFICERS, BE LIABLE FOR ANY DIRECT, INDIRECT, OR INCIDENTAL DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES, HOWSOEVER CAUSED, INCLUDING BUT NOT LIMITED TO SPECIAL OR CONSEQUENTIAL DAMAGES, LOST REVENUE, BUSINESS INTERRUPTION, LOST OR DAMAGED DATA, OR ANY OTHER COMMERCIAL OR ECONOMIC LOSS, WHETHER BASED IN CONTRACT, TORT (INCLUDING NEGLIGENCE), OR ANY OTHER THEORY OF LIABILITY, ARISING OUT OF OR RESULTING FROM ACCESS TO OR POSSESSION OR USE OF THIS DOCUMENT, EVEN IF CSA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES.

In publishing and making this document available, CSA is not undertaking to render professional or other services for or on behalf of any person or entity or to perform any duty owed by any person or entity to another person or entity. The information in this document is directed to those who have the appropriate degree of experience to use and apply its contents, and CSA accepts no responsibility whatsoever arising in any way from any and all use of or reliance on the information contained in this document.

CSA is a private not-for-profit company that publishes voluntary standards and related documents. CSA has no power, nor does it undertake, to enforce compliance with the contents of the standards or other documents it publishes.

Intellectual property rights and ownership

As between CSA and the users of this document (whether it be in printed or electronic form), CSA is the owner, or the authorized licensee, of all works contained herein that are protected by copyright, all trade-marks (except as otherwise noted to the contrary), and all inventions and trade secrets that may be contained in this document, whether or not such inventions and trade secrets are protected by patents and applications for patents. Without limitation, the unauthorized use, modification, copying, or disclosure of this document may violate laws that protect CSA’s and/or others’ intellectual property and may give rise to a right in CSA and/or others to seek legal redress for such use, modification, copying, or disclosure. To the extent permitted by licence or by law, CSA reserves all intellectual property rights in this document.

Patent rights

Attention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. CSA shall not be held responsible for identifying any or all such patent rights. Users of this standard are expressly advised that determination of the validity of any such patent rights is entirely their own responsibility.

Authorized use of this document

This document is being provided by CSA for informational and non-commercial use only. The user of this document is authorized to do only the following:

.

If this document is in electronic form:

.

.

load this document onto a computer for the sole purpose of reviewing it; search and browse this document; and

print this document.

Limited copies of this document in print or paper form may be distributed only to persons who are authorized by CSA to have such copies, and only if this Legal Notice appears on each such copy.

.

In addition, users may not and may not permit others to

.

.

alter this document in any way or remove this Legal Notice from the attached standard; sell this document without authorization from CSA; or

make an electronic copy of this document.

If you do not agree with any of the terms and conditions contained in this Legal Notice, you may not load or use this document or make any copies of the contents hereof, and if you do make such copies, you are required to destroy them immediately. Use of this document constitutes your acceptance of the terms and conditions of this Legal Notice.

Standards Update Service

Z240.10.1-08

March 2008

Title: Site preparation, foundation, and anchorage of manufactured homes

Pagination: 40 pages (vi preliminary and 34 text), each dated March 2008

To register for e-mail notification about any updates to this publication

• go to shop.csa.ca

• click on CSA Update Service

The List ID that you will need to register for updates to this publication is 2020027.

If you require assistance, please e-mail techsupport@csagroup.org or call 416-747-2233.

Visit CSA Group’s policy on privacy at csagroup.org/legal to find out how we protect your personal information.

CSA Standard

Z240.10.1-08

Site preparation, foundation, and anchorage of manufactured homes

Published in March 2008 by Canadian Standards Association A not-for-profit private sector organization

5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6 1-800-463-6727 • 416-747-4044

Visit our Online Store at www.ShopCSA.ca

100%

The Canadian Standards Association (CSA) prints its publications on Rolland Enviro100, which contains 100% recycled post-consumer fibre, is EcoLogo and Processed Chlorine Free certified, and was manufactured using biogas energy.

To purchase CSA Standards and related publications, visit CSA’s Online Store at www.ShopCSA.ca or call toll-free 1-800-463-6727 or 416-747-4044.

ISBN 978-1-55436-347-6

Technical Editor: Vanessa A. Mitchell

© Canadian Standards Association — 2008

All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.

© Canadian Standards Association

Contents

Site preparation, foundation, and anchorage of manufactured homes

Technical Committee on Factory Certification of Buildings iv

Preface vi

1. Scope 1

   
   

2. Reference publications 1

   
   

3. Definitions 2

   
   

4. General requirements 2

   1. Compliance 2

   2. Documentation of alternative solutions 3

   3. Equivalency 3

      
      

5. Site preparation 3

   1. General 3

   2. Clearance 4

      
      

6. Foundations 4

   1. General 5

   2. Footings 5

   3. Frost action 5

   4. Pier and pile foundations 6

   5. Other foundation systems 7

      
      

7. Anchorage to resist overturning 7

   
   

8. Connection of multiple-section units 8

   1. General 8

   2. Structural requirements 8

   3. Air and vapour barriers 8

   4. Weathertightness 9

   5. Firestopping of concealed spaces 9

      
      

9. Skirting 9

   1. Installation 9

   2. Ventilation of crawl space 9

Annexes

A (informative) — Site preparation 12

1. (informative) — Foundations 13

2. (informative) — Anchorage systems 23

D (informative) — Multiple-section units 29

E (informative) — Skirting 32

Tables

1. — Minimum footing areas (concrete and wood footings), m2 (ft2 ) 10

2. — Wind exposure factor, Ce 10

Figures

1 — Minimum footing areas (concrete and wood footings), m2 11

March 2008 iii

Z240.10.1-08 © Canadian Standards Association

Technical Committee on Factory Certification of Buildings

P. Aitchison Triple M Housing Ltd., Lethbridge, Alberta

Chair

A. Chown Canadian Codes Centre,

National Research Council Canada, Ottawa, Ontario

Vice-Chair

D. Ball Brookswood Homes, Langley, British Columbia

N. Belrechid National Research Council Canada, Ottawa, Ontario

Associate

J. Brothers Ontario Manufactured Housing Association, Strathroy, Ontario

Associate

W.E. Burningham Bowmanville, Ontario

Consumer Representative

J. Coppens Guildcrest Homes, Morewood, Ontario

D. Cormier Kent Homes Limited,

A Division of J.D. Irving Limited, Bouctouche, New Brunswick

D. Darling Prestige Homes, Sussex, New Brunswick

J. Einarson Yukon Department of Community Services, Whitehorse, Yukon

A. Gagné L’Association provinciale des constructeurs d’habitations du Québec,

Anjou, Québec

Associate

J.T. Gryffyn Ontario Ministry of Municipal Affairs and Housing,

Toronto, Ontario

K. Habib CSA International, Edmonton, Alberta

Associate

F.G. Higgs Manufactured Housing Association of British Columbia,

Pitt Meadows, British Columbia

Associate

1. Hunter GLP Canada, Oakville, Ontario

   
   

   iv March 2008

   
   

   © Canadian Standards Association

   Site preparation, foundation, and anchorage of manufactured homes

   
   

   
   

   A.R. Khan Alberta Ministry of Municipal Affairs and Housing, Edmonton, Alberta

   
   

2. Kummerlen Moen Incorporated,

North Olmsted, Ohio, USA

Associate

K. Maynard Canadian Manufactured Housing Institute, Ottawa, Ontario

S. Nigro Modular/Manufactured Housing Association of Alberta and Saskatchewan,

Edmonton, Alberta

Associate

K. Rauch Cobourg, Ontario

Consumer Representative

H. Starno MHI Canada, Ottawa, Ontario

B. Wells Parkbridge Communities, Freelton, Ontario

Y. Williams Manufactured Housing Association of Atlantic Canada, Moncton, New Brunswick

Associate

R.S. Wilson City of Fredericton, Fredericton, New Brunswick

V.A. Mitchell Canadian Standards Association, Mississauga, Ontario

Project Manager

March 2008 v

Z240.10.1-08 © Canadian Standards Association

Preface

This is the third edition of CSA Z240.10.1, Site preparation, foundation, and anchorage of manufactured homes. It supersedes the previous editions, published in 1994 and 1986 under the title Site Preparation, Foundation, and Anchorage of Mobile Homes.

This Standard is intended to be referenced by regulatory authorities, landlease community owners, and others so that improved on-site installation of manufactured homes can be achieved.

This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard.

This Standard was prepared by the Technical Committee on Factory Certification of Buildings, under the jurisdiction of the Strategic Steering Committee on Building Products and Systems, and has been formally approved by the Technical Committee.

March 2008

Notes:

1. Use of the singular does not exclude the plural (and vice versa) when the sense allows.

2. Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose.

3. This publication was developed by consensus, which is defined by CSA Policy governing standardization — Code of good practice for standardization as “substantial agreement. Consensus implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this publication.

4. CSA Standards are subject to periodic review, and suggestions for their improvement will be referred to the appropriate committee.

5. All enquiries regarding this Standard, including requests for interpretation, should be addressed to Canadian Standards Association, 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6.

   Requests for interpretation should

   1. define the problem, making reference to the specific clause, and, where appropriate, include an illustrative sketch;

   2. provide an explanation of circumstances surrounding the actual field condition; and

   3. be phrased where possible to permit a specific “yes” or “no” answer.

Committee interpretations are processed in accordance with the CSA Directives and guidelines governing standardization and are published in CSA’s periodical Info Update, which is available on the CSA Web site at www.csa.ca.

vi March 2008

© Canadian Standards Association

Z240.10.1-08

Site preparation, foundation, and anchorage of manufactured homes

Site preparation, foundation, and

anchorage of manufactured homes

1. Scope

   
   

   1.1

   This Standard applies to manufactured and modular homes designed to be supported on longitudinal floor beams.

   Note: For simplicity, the term “manufactured home” is used in this Standard to refer to both manufactured homes and modular homes.

   
   

   1.2

   This Standard includes requirements for the following aspects of manufactured home installation:

   1. site preparation;

   2. foundations for single- and multiple-section single-storey units;

   3. anchorage;

   4. connection of multiple-section units; and

   5. skirting.

   
   

   1.3

   This Standard is intended to be used by installers, inspectors, and owners of manufactured homes.

   
   

   1.4

   Foundation systems designed and constructed in accordance with this Standard are permanent installations.

   
   

   1.5

   In CSA Standards, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; “may” is used to express an option or that which is permissible within the limits of the standard; and “can” is used to express possibility or capability. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

   
   

   1.6

   The values given in SI (metric) units are the standard. The values given in parentheses are for information only.

   
   

2. Reference publications

This Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendments published thereto:

March 2008 1