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#1342 - 05/14/05 01:01 PM Decks
DeckMaker
Informed Do It Yourselfer


Registered: 05/13/05
Posts: 9
Loc: san francisco, ca, usa
I am using a saddle beam construction and the beams run out from the house twelve feet on posts spaced six feet apart width and length of the deck. Do you suggest joists on top of the beams or inbetween them? Deck is 6 feet off the ground.
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#1343 - 05/14/05 10:56 PM Re: Decks
provip Moderator
Super Do It Yourselfer


Registered: 03/03/01
Posts: 1153
Loc: Victoria, BC, Canada
Either or is acceptable.

Depends whether you want the beams to act as the header joists as well otherwise the joists can be cantilevered over the beam. You will likely have to brace the posts when running out from the house.

If you use the proper size beams you can usually space posts more than 6 feet.

------------------
Bart Blainey, B.E.R.
Consultant/Journeyman Carpenter
Building Envelope Specialist
Master Renovator
provip@prodeck.org
http://www.prodeck.org

Barton Blainey (provip) specifically assumes no legal liability or responsibility for the accuracy, completeness or usefulness of any information or process disclosed. The above further expressly advises that any use of or reliance upon the information and or opinion disclosed is at your risk .
_________________________
Bart Blainey, B.E.R.
Consultant/Journeyman Carpenter
Building Envelope Specialist
Master Renovator
provip@prodeck.org
http://www.prodeck.org

Barton Blainey (provip) specifically assumes no legal liability or responsibility for the accuracy, completeness or usefulness of any information or process disclosed. The above further expressly advises that any use of or reliance upon the information and or opinion disclosed is at your risk .

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#1344 - 05/15/05 01:33 AM Re: Decks
DeckMaker
Informed Do It Yourselfer


Registered: 05/13/05
Posts: 9
Loc: san francisco, ca, usa
Beams on top of posts will be attached to house ledger. No cantaliever. Am using 2x6 for both beams and joists. Is 16" apart for joists between beams ok or can I go more space? Thanks.
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#1345 - 05/15/05 06:49 PM Re: Decks
provip Moderator
Super Do It Yourselfer


Registered: 03/03/01
Posts: 1153
Loc: Victoria, BC, Canada
The kind of wood (species) is a factor when determining spans.

From our tables I would suggest 2x6 joist spans no more than 9 feet. 3 ply 2x6 beams no more than 6 feet.

16" centers is max. If you want a firmer deck with less bounce use 12" centers.

------------------
Bart Blainey, B.E.R.
Consultant/Journeyman Carpenter
Building Envelope Specialist
Master Renovator
provip@prodeck.org
http://www.prodeck.org

Barton Blainey (provip) specifically assumes no legal liability or responsibility for the accuracy, completeness or usefulness of any information or process disclosed. The above further expressly advises that any use of or reliance upon the information and or opinion disclosed is at your risk .

[This message has been edited by provip (edited 05-15-2005).]
_________________________
Bart Blainey, B.E.R.
Consultant/Journeyman Carpenter
Building Envelope Specialist
Master Renovator
provip@prodeck.org
http://www.prodeck.org

Barton Blainey (provip) specifically assumes no legal liability or responsibility for the accuracy, completeness or usefulness of any information or process disclosed. The above further expressly advises that any use of or reliance upon the information and or opinion disclosed is at your risk .

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#1346 - 05/16/05 12:49 AM Re: Decks
DeckMaker
Informed Do It Yourselfer


Registered: 05/13/05
Posts: 9
Loc: san francisco, ca, usa
Am using pressure treated wood everywhere for foundation; composite for planks. Thank you.
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#1347 - 05/19/05 12:39 AM Re: Decks
provip Moderator
Super Do It Yourselfer


Registered: 03/03/01
Posts: 1153
Loc: Victoria, BC, Canada
Composite are great for planks.

Not sure what you mean by pressure treated for foundation.

Bart
_________________________
Bart Blainey, B.E.R.
Consultant/Journeyman Carpenter
Building Envelope Specialist
Master Renovator
provip@prodeck.org
http://www.prodeck.org

Barton Blainey (provip) specifically assumes no legal liability or responsibility for the accuracy, completeness or usefulness of any information or process disclosed. The above further expressly advises that any use of or reliance upon the information and or opinion disclosed is at your risk .

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#1348 - 05/19/05 12:55 AM Re: Decks
DeckMaker
Informed Do It Yourselfer


Registered: 05/13/05
Posts: 9
Loc: san francisco, ca, usa
Pressure treated is the wood that is chemically treated to resist rotting and insect damage.
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#1349 - 05/19/05 01:35 AM Re: Decks
provip Moderator
Super Do It Yourselfer


Registered: 03/03/01
Posts: 1153
Loc: Victoria, BC, Canada
Sorry, I didn't explain myself clearly.

What I meant was, are you using pressure lumber as your foundation?

Pressure treated lumber generally is used for foundations in areas were there is perma frost. Here, in residential construction, there is often no need for concrete.

------------------
Bart Blainey, B.E.R.
Consultant/Journeyman Carpenter
Building Envelope Specialist
Master Renovator
provip@prodeck.org
http://www.prodeck.org

Barton Blainey (provip) specifically assumes no legal liability or responsibility for the accuracy, completeness or usefulness of any information or process disclosed. The above further expressly advises that any use of or reliance upon the information and or opinion disclosed is at your risk .
_________________________
Bart Blainey, B.E.R.
Consultant/Journeyman Carpenter
Building Envelope Specialist
Master Renovator
provip@prodeck.org
http://www.prodeck.org

Barton Blainey (provip) specifically assumes no legal liability or responsibility for the accuracy, completeness or usefulness of any information or process disclosed. The above further expressly advises that any use of or reliance upon the information and or opinion disclosed is at your risk .

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#1350 - 05/19/05 08:46 PM Re: Decks
DeckMaker
Informed Do It Yourselfer


Registered: 05/13/05
Posts: 9
Loc: san francisco, ca, usa
Entire area under deck is solid concrete. Will put six foot tall posts on concrete piers on this concrete floor. Posts will be exactly six feet apart lengthwise and widthwise. Doubled two by sixes will attach to house ledger and sit on top of posts as beams. The joists will be placed 16" apart between the beams. All of the above lumber "foundation" will be pressure treated. Then composite planks. Deck is 12x24. Thanks for your hints and suggestions.
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#1351 - 05/19/05 08:50 PM Re: Decks
DeckMaker
Informed Do It Yourselfer


Registered: 05/13/05
Posts: 9
Loc: san francisco, ca, usa
Also this is Northern California. Absolutely no perma frost or snow. Last deck was entire redwood but never had stain or sealer ever and started rotting after 15 years, but some of the wood is still perfect. Maybe dont need pressure treated if redwood or spruce is used and properly sealed but I do not want to have to maintain sealing it from here on out.
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