Decks

What is considered a deck?

An exterior floor system supported on at least two opposing sides by an adjoining structure and/or posts, piers, or other independent supports.

What are the requirements for building a deck?

• Decks must be constructed according to Washtenaw County Deck Standards.

• Decks are required to support a 40 pound live load.

• Materials used for the construction of decks are to be of natural durable or treated lumber.

• Fasteners used in treated material shall be galvanized, plated or other corrosion resistant material.

• Decks elevated 30" or more require guards minimum 36" above deck surface and nosing of treads in accordance with The State Building Code.

• Three or more risers require graspable handrails.

• Where supported by attachment to an exterior wall, decks shall be positively anchored to the primary structure and designed for both vertical and lateral loads as applicable. (BOLTED)

• Posts/piers must bear on undisturbed soils, posts within 3 to 4 foot of house are in backfill area and must be excavated to undisturbed soils. (basement footing depth)

For More Information:

• See the Residential Code Information Sheet
• Contact the Building Department for your jurisdiction