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OBC DIVISION B · PART 9 · SECTION 9.39 — PARK MODEL TRAILERS

What foundation and anchorage requirements apply to park model trailers in Ontario?

Park models must be supported on stands, piers or pads capable of carrying their loads without harmful settlement, and anchored to resist wind uplift, sliding and overturning, with tie-downs and connections consistent with the manufacturer's and CSA Z241 provisions.

Code reference
On-site installation of park model trailers requires adequate support and anchorage: bearing elements such as piers, blocking on pads or engineered stands sized for the soil and unit loads, plus anchorage systems securing the unit against wind forces. Skirting, service connections and steps or decks must be arranged so they do not compromise the unit or its ventilation and access requirements.
OBC Division B, Section 9.39.

Paraphrased for clarity — open this provision in the BUILDAiD Library for the exact wording.

What this means in practice

Lightweight, boxy and often sited on open lakefront or exposed park lots, park models are genuinely vulnerable to wind, so anchorage is not a formality. Use tie-down systems and ground anchors matched to soil conditions, and follow the unit manufacturer's designated anchor points. Support piers on organic or frost-active soils will move seasonally; plan for re-levelling and keep flexible service connections. Site-built additions, sunrooms and large decks are a recurring compliance headache, since they are separate structures needing their own permits and must not load or trap the trailer.

Plain language

A park model cannot simply rest on its wheels; it needs solid piers or pads underneath and straps or anchors tying it to the ground so wind cannot shift or flip it. Decks and add-a-rooms need their own permits.

Related questions

When does the Ontario Building Code apply to park model trailers?

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This page is provided for general information. Building code requirements depend on your specific project, occupancy and municipality, and code editions change. Always verify requirements against the current Ontario Building Code and confirm with your local building department.