Deck Designer

Residential deck per DCA6: joists, beam, posts, footings & ledger.

Design diagram — updates live with your inputs

Material

Species Pressure-treated SP typical

Grade

Deck width (along house) (ft)

Deck projection (ft) Out from the house = joist span

Joist spacing (in) On center

Joist width (in)

Joist depth (in) 2x10 = 9.25

Beam ply width (in)

Beam depth (in)

Beam plies Built-up beam

Post spacing (ft) Beam span

Post size (in) 6x6 = 5.5

Post height (ft)

Soil bearing (psf) Allowable

Footing size (ft) Square

Ledger lag spacing (in) Provided lag spacing to the house band

Dead load (psf)

Live load (psf) IRC residential deck

NDS 2018