Replies

1. 
   AdamGreisz | Oct 13, 2007 04:13am | #1

   The Simpson THA222-2 has 22" straps. However it needs to be bent over the top of the ledger a minimum of 2 1/2". Here is a link. Please note minimum nailing requirements and type of nails specified. You may be able to modify your ledger to achieve the 2 1/2" that is required (Double the ledger width).

   http://www.strongtie.com/products/connectors/THA-THAC.html

   Wood is Good

   Adam Greisz

    

2. 
   jonblakemore | Oct 13, 2007 05:29am | #2

   I would not do what you're planning on to do. Okay, I would if an engineer gave the okay AND I was comfortable with the detail specified as well.

   I'm not sure why you have to have a beam parallel with the joists but I'm assuming it's in there because you have a significant load to carry. And therein lies the problem.

   Achieving a ledger connection that is suitable for the point loads that you're going to see (probably 6-15x a normal joist hanger load) will be very questionable.

   Finally, I don't know what "weepers" are, but I would put a post in so your beam has a cantilever of no more than two feet. Deal with the weepers as best as you can.

    

   Jon Blakemore

   RappahannockINC.com Fredericksburg, VA

1. 
   jimblodgett | Oct 13, 2007 06:52am | #3

   What Jon said.And make sure to space that ledger away from the building if it's outdoors - give water a chance to escape instead of trapping it in the joint between ledger and building.Loren Wallace for president.

1. 
   MrBlister | Oct 13, 2007 01:20pm | #4

   Ahoy Jim,

   Thanks for the heads up.  I plan to install a piece of 5/4 PT every 2' on the sill.  where it gets lagged. It probably wouldn't hurt to wrap the end grain of the PT with some "Ice Shield" as well.

   Cheers, 

2. 
   MrBlister | Oct 13, 2007 01:34pm | #5

   Jon

   The deck will be on a inside corner of the house.  The beam will be parallel to one wall thus I have to attach the end of the beam where it meets the other wall.  The "weepers" are the perimeter tile  drainage .  The concrete foundation contractor had backfilled against the walls with the native soil (clay,) which I really don't want to get into. 

   It seems there are hangers big enough available from Strongtie for this.

   Thanks

1. 
   andy_engel | Oct 14, 2007 01:58am | #8

   Agreed that hanging a beam off the ledger is a bad idea. Talk to an engineer.

   If you do bolt to the foundation, check out Farifax County, Virginia's website for some great info on bolting ledgers to foundations. It's not an exact match to your problem, but key is that you may not use lead anchors. Use either steel expansion bolts or adhesive anchors.Andy

   "Never try to teach a pig to sing. It wastes your time and annoys the pig." Robert A. Heinlein (or maybe Mark Twain)

   "Get off your dead #### and on your dying feet." Mom

   "Everything not forbidden is compulsory." T.H. White, The Book of Merlin

3. 
   Piffin | Oct 13, 2007 02:45pm | #6

   first thing - your beam does not span twenty feet. It is twenty feet log. The span is the distance between bearing points. If those are equally spaced, it is ten foot spans.

   The connection you plan is a terrible idea. If this is down at foundation level, use a hanger to the foundation wall with Caliburn or tapcon screws.

   Then move the near pier to be close to the house as you are comfortable with relaative to theperimeter drain ( weepers?). try for 2-3 feet. Since this increases span, go to three instead of two for beam size

    

    

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4. 
   AdamGreisz | Oct 13, 2007 10:39pm | #7

   If you can carry your beam with a hanger bolted directly to  the foundation you should do so. Or you could bolt a section of PT 2 x 10 to the foundation and use a regular face mount hanger.

    

   Wood is Good

   Adam Greisz