1 / 126

UDC Inspector Seminar

UDC Inspector Seminar. 2007. Understanding Manufactured Home Installation Standards. Presenter – Ross Kinzler. Executive Director of Wisconsin Housing Alliance. Presenter – Mike Zenner. Inspection Services. Ross Kinzler. With MH industry since 1989 Chief lobbyist for the industry.

Mercy
Download Presentation

UDC Inspector Seminar

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. UDC Inspector Seminar 2007 Understanding Manufactured Home Installation Standards

  2. Presenter – Ross Kinzler • Executive Director of Wisconsin Housing Alliance Presenter – Mike Zenner Inspection Services

  3. Ross Kinzler • With MH industry since 1989 • Chief lobbyist for the industry

  4. Mike Zenner • Over 35 years of manufactured housing experience • Wick Quality Control • Currently – Inspection Services • AC inspections under the HUD Code • UDC Construction and other creditials

  5. What we’re going to learn • Basics of the HUD Code • Installation standard for existing homes • New HUD Installation Standard • New licensing law for installers

  6. What’s in your book? • Key to the Code • Did you know? • Commerce contacts • Web links • Older home installation standard info • Licensing info • New installation standard • Resources

  7. What’s What • Home is covered by HUD Code which preempts state and local law • New installation standards preempt local ordinances just like the UDC • Pier installation standards are now a part of the UDC • Watch out for places where codes interface • Understanding the HUD Code

  8. What is the Timeline • Sept to March – training installers • Jan 1 –licensing in effect • Jan to April – training inspectors • April 1 – new code effective and inspections begin Inspectors may not be employees of home manufacturer, a salesperson involved in the sale or an installer involved with the particular home

  9. Critical Websites • See page 6

  10. Licensing • Trigger is installing a home on a foundation • Anchoring – no • Grading – no • Excavation – no • Pouring basement – no • The person supervising the home going on the foundation - yes

  11. Licensing • General supervision – the installer does not need to be on the job site • Homeowner is exempt from licensing but if people help and would otherwise need a license they must be licensed

  12. Licensing of Installers • Qualifications • 18 years old • Not been found responsible in any court or agency hearing of a violation of the installation law during prior 2 years • Not been found responsible in any court or agency hearing for failure to perform under installation contract or defrauding a person in the provision of installation services

  13. Application for Installers License • $100 license fee plus one time $10 application fee for 4 year license • Take 12 hour qualifying class & pass exam • Unless application made by June 1 • Have installed 10 or more homes personally

  14. Renewal • Renewal requires 12 hours of continuing education over the 4 year period • Also must not have been found responsible for breaking the rule or defrauding a customer

  15. Wisconsin Installation Standard • Act 45 authorized Commerce to adopt standard • Manufactured Housing Code Council - recommended rule adopted draft federal rule • Council is attached to the Dept of Commerce • Published in Administrative Register

  16. Comm 21.40 • Formerly Comm 27.18 • Now a part of the UDC • Applies to homes built before April 1, 2007

  17. Comm 21.40 • No footing on unprepared fill. All organic matter must be removed. • Soil bearing test using pocket penetrometer • Grade site to drain water away for minimum of 5 ft from home • A footing for every pier, nominal 16” by 16” • Consult others if soil is less than 2000 psi

  18. Comm 21.40 Footings • A. one 4 by 16 by 16 solid blocks or two 4 by 8 by 16 solid blocks. • B. 16 by 16 ABS pad rated at not less than 6000 lbs • C. 18 inch diameter hole bored below the frost line or to unfractured bedrock and filled with poured concrete • D. Other materials or systems approved by Commerce

  19. Comm 21.40 Piers • Concrete blocks, manufactured steel stands or manufactured concrete stands • Single stack piers limited to 36 inches • Single stack piers loads limited to 8,000 lbs • 36 to 80 inch piers – double blocked (layered in opposing layers) • 80 inch or more – double blocked laid in concrete mortar, cores filled with mortar and ½ inch steel reinforcing rod

  20. Comm 21.40 Concrete Blocks • 2 core design, construction grade 8x8x16 • Cores placed with cores open vertically • Block nearest main frame shall be perpendicular to the linear direction of frame • No block may contact the frame

  21. Comm 21.40 – Pier Spacing • No more than 7 feet on center • No more than 3 feet from exterior side of each end wall • Can be varied to follow manufacturer tables • Piers under clear-span openings of 4 feet or more in mating walls • Piers must be plumb and centered under point of support

  22. Comm 21.40 - Caps • Solid concrete block or solid wood block having nominal thickness of at least 2 inches • Cap must be same width and length as top of pier • No more than 2 pieces – 2 piece caps positioned with joint perpendicular to frame if used

  23. Comm 21.40 - Shims • Where used, driven from opposing sides and be no less than 4” by 8” • Wood caps and shims at least equal to #2 spruce pine fir with min bending stress rating of 1200 psi. All wood caps must be of same species of wood. All shims must be of same species of wood.

  24. Comm 21.40 – Height limits • Combination of nominal 2 inch solid concrete block or wood cap plus shims must not exceed 3 ½ inches • Minimum clearance under home of 12 inches between lowest point of main frame in area of utility connections. Min clearance of 12 inches for 75% of home. Remainder may be less than 12 inches but cannot touch ground

  25. Federal Installation Standard • MHCC recommended rule • HUD Secretary published rule for comment • HUD Secretary published proposed final rule • OMB Review completed • Awaiting final publication (November??)

  26. The Standards • 3280 – HUD Construction Standards for the home • 3285 – HUD Model Installation Standards • VERY IMPORTANT (means will be on test) • The following must be AT LEAST AS STRINGENT as the federal model • State Standards • Manufacturer Manuals

  27. HUD Code Development • Manufactured Home Consensus Committee approves standards • Secretary of HUD submits for public comment • Secretary of HUD issues final rule following OMB input (White House) • Rule is published in Federal Register

  28. Understanding Part 3285 • Use the Blue and Red Cheat Sheet

  29. Definitions • Words have meaning so read them carefully – see 3285.5 • A manufacturer must provide with each new home a DAPIA approved designs and instructions that are consistent with the standards – 3285.2 • DAPIA – means Design Approval Primary Inspection Agency

  30. Variations by Installer • If you vary support and anchorage from the manufacturer’s instructions, the installer must obtain site-specific instructions from the (1) manufacturer or (2) a registered professional engineer or (3) registered architect. 3285.2(b)

  31. Temporary Storage • The manufacturer’s instructions must provide at least one method for temporarily supporting each section to prevent structural damage when those sections are sited at the plant, retailer’s lot or home site. 3285.2(c)

  32. Reference publications • Some to remember • ASTM – American Society for Testing & Materials • NFPA – National Fire Protection Assn • FEMA – Federal Emergency Management Agency

  33. Application • These standards apply to HUD Code manufactured Homes not modulars.

  34. Fire Separation • Fire separation distances in accord with NFPA 501(a) must be maintained. Means 10 feet • Fire separation distance must also comply with Comm 26 in a mobile home park (10 feet between basic structures) • Local ordinances might have additional requirements

  35. Flood Zones • Installer is responsible to determine if home is being installed in flood zone. 3285.102(c) • If it is, special installation methods are required. • Also note Shoreland zoning implications

  36. Zone Maps • 3 maps in the HUD Code • Wind – Wisconsin in Zone 1 • Roof Load – Wisconsin is South and Middle Zones • Thermal Zone – Wisconsin is Zone 3 • U/O value must be less than 0.079 • U/O is inverse of R value 0.079 = R 12.6 • Homes may not be installed in a wind zone that exceeds the design load for the home.

  37. Site Preparation • Soil Mechanics • Soil tests can be conducted with a pocket penetrometer • Footings must be sized and spaced according to soil bearing capacity • Also see the tables in 3285.202 • Poor soils – peat, organic clays or uncompacted fill require a geologist, engineer or architect’s opinion

  38. Site Drainage • Drainage must provided to direct surface water away from home and prevent build up under home. • Minimum slope of ½ inch per foot for the first 10 feet • Where site is sloped, home must be protected from surface runoff

  39. Crown and Grade Site

  40. Gutters and Downspouts • Manufacturer must specific if the home is designed for them • When installed, runoff must be directed away from the home

  41. Ground Moisture Control • Vapor barrier must be installed except in arid regions • Min. 6 mill poly or equivalent • Overlap 12 inches and seal • Barrier may be under, over or around footings • Voids and tears must be repaired • 3285.204

  42. Ground Moisture Control • 1 pint of water vapor is generated in 24 hours • @ 55 degrees under 10 sq. ft of floor area. 1500 sq ft home then equals 150 pints of water. That’s 16-19 gallons of water

  43. Foundations - Piers • Concrete blocks – Must conform to ASTM standard C 90-02 • Pressure treated wood – think pilings • Adjustable metal - Manufactured piers must be labeled or listed for loads and installed to the pier manufacturer’s instructions • Listed means approved for use

  44. Pier loads • Must be designed with load taken into consideration • Spacing is dependant on factors such as soil bearing capacity and foot size • See tables at 3285.303 • Pier spacing tables do not taken into consideration flood or seismic loads see an engineer or architect

  45. Pier Configuration • Load bearing blocks not decorative • Nominal 8 by 8 by 16 inches • Stacked with hollow cores aligned vertically • When stacked side by side, each layer at right angles to preceding one • Center beam/mating line supports are always required for multi-section homes

  46. Caps • Must evenly distribute loads across the capped hollow block piers • May be made of solid concrete or masonry at least 4 inches nominal thickness OR hardwood lumber at least 2 inches thick OR corrosion protected min ½ inch thick steel or other listed materials

More Related