10:00AM | 05/02/04
Member Since: 02/21/04
138 lifetime posts
I would like to build a deck on an existing poured concrete patio. I plan on using simpson strong tie anchor brackets for my 4x4 risers (about 12" height) Then bolt to sides 2- 2x8 or 10s, and cantilever over edge of patio about 18". Then I would like to run 2x8 s perpendicular and cantilever out over to the lawn, using simpson strong fasteners also. I would like to use timbertech decking on top. This would be free of the house and just supported by the patio. My questions are, should I go with double joists on the first direction or or could I do it with a single? Should they be 2x10s or can I do it with 2x8s? How far of a cantilever can I make with either? I don't nee any more than 18".


01:39PM | 05/02/04
Member Since: 01/28/03
693 lifetime posts
It is not possible to tell you what size floor joist you need without also knowing the overall span these joists will cover, they type lumber from which the joist will be made, and your local building code requirements for total lbs per sq foot of load the deck must be constructed to carry.

As far as the 18" cantilever goes, most any joist from 8 to 10 inches can handle an 18" cantilever.

But for the purposes of this forum, your question cannot be answered.

Consult your local code enforcement office for their requirements.
Click to reply button
Inspiration banner


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply choose button


Post new button or Login button

To test the boundaries of small-footprint living, interior designer Jessica Helgerson moved her family to a 540-square-foo... Filling an underutilized area beneath the stairs is a smart way to save space. Doing so with a stash of wood, however, is ... The Audubon Society inspired wallpaper in this Adirondack-styled mudroom will get you in the outdoor mood. Grab your coat ... Chalkboard paint opens up endless possibilities for customizing your dresser time and time again. Use chalk to label the c... A fireplace in the bathroom creates the ultimate setting for relaxation. Homeowners often choose electric or gas over wood... This roomy boot tray made from punched metal stands up to all the elements. Station it in your mudroom or at your back doo... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... FLOR tiles are an affordable way to customize a carpeted floor covering for any space. Make anything from runners to wall-... Chalkboard paint features prominently in this elegant yet unpretentious headboard design. Add a new message daily to reflec... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... The indecisive homeowner need not fret over choosing one (or even two) cabinet colors. The kitchen cabinets in this artist... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... First dress up your metal shelves with a coat of paint in an accent color that complements your kitchen decor. Then arrang... Dark wood shelving and a matching upholstered bench keep this closet sleek and refined. The large window brightens the sub...
Follow banner a
Newsletter icon Flipboard glossy Facebook Twitter Pinterest Youtube Rss icon