Replies

1. user-6785380 | Jun 19, 2020 12:20am | #1

   Sounds like a good plan, just make sure to keep the joists level when you pull your diagonals, otherwise you?ll get goofy results, especially if you?re on a slope. You may need to add a temp brace to get them level while you take your measures.

2. andy_engel | Jun 19, 2020 06:15am | #2

   You can build the entire floor box (ledger, side joists, and rim joist) and support them on temporary posts. Square that, and install the girder from below.

   Two unsolicited pieces of advice. Use 6x6 posts and notch them around the girder, through bolting between them. And for the two side joists, use concealed flange joist hangers. It's a much neater job.

1. codythebuilder | Jun 22, 2020 11:39am | #4

   Hi Andy, thanks for the repy.... could you go into a little more detail regarding what you mean by building the floor box? Not sure how I could build and install the girder from below.

1. andy_engel | Jun 22, 2020 08:09pm | #6

   Sure. Just the ledger, the two side joists, and the rim joist. Support the ledger at the house, the side joists and the rim on temporary 2x4s, then square and level that assembly. Once that's done, build the girder below.

3. unclemike42 | Jun 19, 2020 10:50am | #3

   How are you mounting the deck to these posts?

   will the joists be supported by a doubled up rim joist and hangers, or sit on a beam which you support with the posts?

1. codythebuilder | Jun 22, 2020 11:41am | #5

   The plan is to use joint hangars support 2x8 beams, then screw the 2x4's (top of the deck)to those beams.... The ledgers will be attached to 4x4 posts with carraige bolts. Is that what you mean?

4. unclemike42 | Jun 23, 2020 07:39am | #7

   I am having a hard time following your nomenclature.

   https://www.finehomebuilding.com/project-guides/decks/deck-elevation-and-detail-drawings

   My question is if you are planning to install a beam, on top of the 4x4 posts, similar to that shown in the above link. the beam would be parallel to the ledger board attached to the house, but lower in elevation by the thickness of the floor joists.

   if so, the distance from this beam to the house is not critical.

   If you plan to skip such a beam, and support the deck joists with hangers on both ends, then the outside board (parallel to the ledger secured to the house) should be doubled up, and really should sit on top of your 4x4 posts. (not a great idea to just lag a single board into the side of the post)

   The suggestion to lay out the framing on temporary supports and then set the posts sounds like a good one.

5. John_Snow01 | Feb 20, 2024 03:07pm | #8

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1. calvin | Feb 20, 2024 05:41pm | #9

   Over 3 years I?d guess he either gave up, finished and is satisfied, or perhaps divorced.

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