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-   -   Ledger overlapping foundation. (http://www.diychatroom.com/f19/ledger-overlapping-foundation-78236/)

Clutchcargo 08-08-2010 05:52 PM

Ledger overlapping foundation.
 
I'm attaching a 2x10 ledger for my deck. If I line up the ledger with the bottom of the sheathing the finished deck would be on the same plane as the interior floors. Is it possible that I can drop this down by 2" or so so that there is a small step out the door. This would mean that it would overlap the foundation. I like the idea of a separate level for the deck and it would make flashing a lot easier too.
TIA

Clutchcargo 08-09-2010 09:46 AM

1000 words.
 
1 Attachment(s)
Maybe my articulation doesn't make sense. It's balloon type framing and I plan to add blocking between studs.
Thanks for any input.

concretemasonry 08-09-2010 10:08 AM

Why not just do it the best way and build a free-standing deck with a support beam 2' away and cantilever back to be as close to the house as you want AND at the elevation you desire. - The ultimate in flexability of use and design.

A couple of extra posts, but no worries, flashing, moisture and rot. The connection and water are always the classic problem areas that are very hard to do correctly and very, very expensive to tear out and repair, especially when it gets to affecting the interior of the house.

Dick

gmhammes 08-09-2010 10:17 AM

How high will the deck be off the ground?

Clutchcargo 08-09-2010 11:14 AM

Concrete, you've mentioned this to me before and it's starting to sink in. How close to the existing foundation can I install a footing? I've got a couple of corners to go around, which is why I was thinking it would be easiest to attach to the house.
The deck will be 3' off the ground.

Edit: Another question: with a free standing deck, is there any connection to tie the deck to the house?

CoconutPete 08-09-2010 11:51 AM

Mine are going to be 2' from the foundation for my free-standing deck.

I'm also a fan of a step down onto the deck. Mine will be 6" (Scuba dave threw that number out there and it sounded perfect).

concretemasonry 08-09-2010 12:29 PM

With most joists, there is a code and practical limit of about 2', but a deeper joist may be cantilevered more, but an engineer may be required to get approval for something that is not according to prescriptive codes.

Usually, 2' is enough to avoid the buried footing and drain tile (if used).

Usually no connect to the house is necessary for 3' high deck, but some people add a couple (1 or 2) of places (to minimize the dreaded flashing and moisture) to get some horizontal bracing for large, tall deck with 20 people bouncing around on it.

Dick

Clutchcargo 08-09-2010 12:35 PM

Sounds good, I'm sold.
It's fieldstone foundation below grade with blocks above. That will put me at most 3' off the wall to maintain 2' from the footing.
I think I'll rent a machine to do the digging, this is incredibly hard earth. I'll have to dig up the old pilings and add new so I'm in for about 16 holes (8 new/8 old) for my 14x18' deck.

CoconutPete 08-09-2010 12:56 PM

Yeah I'm in the same boat as you right now.... I only have 6 holes though. Trying to decide whether to rent a "big-boy digger" or go it by hand or just try to hire someone who has a mixer & an auger to just do all the concrete work....

concretemasonry 08-09-2010 12:58 PM

For only 16 holes, rent a good auger (2 person) and you will be able to return it quickly (and cheaper) and be able to enjoy beverage with your volunteer. Don't try to fight it with just one person, especially since you will be going down down a ways in tough soil.

Dick

Gary in WA 08-09-2010 01:00 PM

The main concern is getting the proper spread between bolts on the ledger. Page #13, here: http://www.lancova.com/deckinfo.pdf
Notice 6-1/2" minimum from the top of ledger to the lower bolt. In your case it would drill too close to the top edge of the concrete block. Adjust to fit lower and upper bolt placement for full support.
Many B.D.'s want any deck footing within 5 feet of the house's to be as deep.
Cantilever length's are also stated in that Prescriptive Deck Code as sited. Check with local B.D. for safety.


Be safe, Gary


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