The reasons for the below design are:
-I want to place the stairs adjacent to the wall
-I want to use the deck posts as rail posts as well
-this is replacing an old deck and I do not want to dig new holes
At the bottom I have 4 beams 2x8 (a pair on each side sitting on the deck supports)
Just below the deck I have two 2x8 beams parallel to the house, one of them sitting under the joists, the other sitting at the same level with the joists

I need to understand if this is an acceptable design (all the beams will follow the recommended cantilever lengths) I just ned to know if there could be other potential issues

enter image description here

  • You can, but your low beams need to be adequate to carry the entire deck, and you probably can't cantilever them that far. You'll also have a messy appearance unless you skirt it. I'd move the holes. – isherwood Jul 13 '17 at 14:50
  • I will skirt the bottom side. The very reason why the upper front beam is not a at the same level with the back side beam is because I need clearance from the front side to access the storage under the deck – MiniMe Jul 13 '17 at 14:53
  • The bigger issue may be lateral stability. How will you keep the thing from swaying on the unbraced posts? You might have to let in diagonals somewhere. The added cost and complexity here aren't worth saving a hole or two. Hire some temp help. – isherwood Jul 13 '17 at 15:11
  • the posts will be notched and slided in between the two bottom beams like here cdn2.tmbi.com/TFH/Step-By-Step/FH02MAY_UT_MAKPOS_05.JPG There will also be lateral braces – MiniMe Jul 13 '17 at 15:22
  • You don't have any dimensions. What is the length of the cantilever on the left end? – ArchonOSX Jul 13 '17 at 15:45

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