2958 Greenfield Rd., P.O. Box 1060

Ayr, ON N0B 1E0 Phone: 519-632-8800

Fax: 519-632-8700

Email: building@northdumfries.ca

BUILDING PERMIT REQUIREMENTS FOR RESIDENTIAL DECKS

Please submit this checklist with a complete application for permit approval.

1. Application for a permit to construct or demolish

2. Two sets of construction drawings drawn to scale and dimension. It is recommended that a person with general construction knowledge and drafting skills provide the following:

a. Floor plans with joist size and spacing, decking material, beam size and span, footing location and guard post spacing. Details of how the deck will be attached to the building and/or supported.

b. Elevations of the deck showing footing size and depth below grade, maximum height of deck above grade and height of guard. See Table A1 in the Deck Package to size footings.

c. Guard construction and attachment details. See details in the Deck Package for typical details used or provide manufacturer’s specifications for pre-manufactured guard systems. If installing a guard system or decking material other than cedar or treated wood, an evaluation report from the Canadian Construction Materials Centre (CCMC) or a design from a professional engineer is required.

d. Cross sections. e. Engineered product specifications and layouts. f. Truss Layout.

3. All decks must comply with the Zoning By-Law requirements even if a building permit is not required. Two copies of the site plan drawn to scale showing:

a. Lot lines, property lines, and all existing structures (house, garage, sheds, decks).

b. Dimension the size of the lot and distances from the proposed deck to all property lines and any adjacent buildings (and septic tank and bed if applicable).

c. All easements on your property must also be shown.

4. Grand River Conservation Authority approval (for regulated areas); contact 519-621-2761.

5. Septic location (if applicable).

6. Deck permit fee $170.00

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*The minimum requirement is 2.8m in the R1, RR1 and RR2 zones. A covered porch must be a minimum of 1.2,

except in the R1, RR1 and RR2 zones, which are to be 3.0m

COLUMN FOOTING REQUIREMENTS FOR DECKS

COLUMN FOOTING DIAMETER (in)

Floor Area Supported (sqft)

0 10 15 20 25 30 40 50 60 70 80 90 100

8” 8” 8” 8” 9” 10” 11” 13” 14” 15” 16” 17” 18”

Note: 1. Underside of Footing to be Minimum of 4’-0” Below Grade 2. Soil to Have a Minimum 75 kPa Bearing Pressure (1500 lb/sqft) 3. Concrete Strength to be Minimum 15 Mpa (2200lb/sqft)

BEAM SIZES FOR DECKS

Bearing

Length

Size of Beam

2 x 8 2 x 10 2 x 12

2 PLY 3 PLY 2 PLY 3 PLY 2 PLY 3 PLY

8 7-9 9-6 9-6 11-8 11-0 13-6

10 6-9 8-6 8-0 10-4 8-9 12-1

12 5-8 7-9 6-8 9-6 7-3 11-0

Note:

1. Table Based on a Deflection Criteria of I/240

FLOOR JOIST SPANS FOR DECKS

MEMBER

SIZE

Strapping Bridging Bridging & Strapping

Joist Spacing (in) Joist Spacing (in) Joist Spacing (in)

12 16 24 12 16 24 12 16 24

2 x 6 (1) 9-7 8-11 8-2 10-4 9-4 8-2 10-4 9-4 8-2

2 x 8 11-7 11-0 10-6 12-5 11-9 10-9 13-1 12-2 10-9

2 x 10 13-8 13-0 12-4 14-6 13-8 12-10 15-1 14-1 13-2 Note:

1. 2 x 6 Joist Only Permitted if Deck is Less Than 6’-0” Above Grade

Note:

• If installing spindles instead of the 2” x 2” pickets, the required minimum size of the turned portion is 1 9/32”. There are many spindles on the market which do not meet this requirement. Do not install them within your required guard!

• Do not notch your 4” x 4” guard posts around your deck joists. See attached details on how to fasten the post.