Hi folks,

I’m a homeowner embarking on converting a relatively recently build covered porch into a sunroom. I will be pulling a permit for the job and the building inspector has pointed out I need to either a) replace or enhance 2×12 rim joist with a proper doubled 2×12 beam or b) strengthen the beam/headers supporting the roof. Here’s the details:

Porch is roughly 11 x 12. Gable end is the longer side. Gable end rests on three concrete piers. Two under the corners and one in the center under the ridge. There are no piers between the house and the gable end of the structure. Floor joists are 2×10. Rim joists are the same. The rim joist is simply lagged into the 6×6 on one end and nailed to the outside edge of the ledger on the other. Not really a load bearing structure. Posts on gable end are PT 6×6. Roof rafters are 2×6. There are (2) full dimension rough hewn 2×8 rafter ties. The beams supporting the roof are doubled up 2×8’s on each side spanning the 11ft or so. BUT, the 6×6 post receiving the beam are only notched to hold one of the 2×8’s. The other is simply sistered to it, so it doesn’t seem to be enough of a beam. The same is true where the beam attaches to the house.

Although as a covered porch, the structure seems solid, the inspector indicates that adding walls, windows and plaster will at a minimum will create enough deflection in the structure to cause problems. I am sure he is right. So…I am looking for help as to the best way to beef this up.

I have a couple questions on options that may seem dumb to you guys, so sorry if they are dopey.

1) The rim joist seems to be holding up nothing but the edge of the floor decking. Can I remove it and replace with a double up 2×12 beam using HANGERS on both ledger AND the post?

OR

2) Can I cut off the 6×6 posts and use a tripled up 2×8 to span the distance and rest on top of the posts on both sides? 

OR

Are both ideas stupid and there is a better way?  🙂

I have included pics. Thanks.

cgardner