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I have to re-read this later. However, I had a couple first thoughts. Not sure if they're good ideas. Anyhow, gotta run. Back laterDon
I will be able to access it as storage space from inside the cabin up in the loft thru a door.
Let's see if I have a handle on this? And for now, let's leave the roof out of it.There's a 12 x 24 ft main cabin.The "as drawn porch" footprint is being expanded to 24 feet long x 6 ft wide. A 10 x 6 ft portion of that will be built with the main cabin floor joists being extended the extra 6 ft. That leaves a 14 x 6 ft area to be a storage area. Here's where I get lost.... QuoteI will be able to access it as storage space from inside the cabin up in the loft thru a door. Is this an open air storage area or a walled off area, like another room? Access from the loft? Sorry, maybe I'm a little slow with turning the word description into a mental image today.
Is this a problem only using the 2x8 loft floor joists to hold up the 6 ft tall rafters wall in the loft? It does not have a bearing wall located right below it now to the floor below.
If the red circled wall ? in the drawing below is under the 18 ft total span width then if it's built as load bearing you would be okay with 2x8's IF the 2x8 joists did not have to support that wall section that goes up to the roof. HmmmThat would probably need some engineering calculations. That would be holding up your snow load. Do you have a drawn floor plan with all the walls, etc?
I would make sure that load bearing wall had a beam under it in the crawl space and not rely on the floor joists to support it.
Well there ya' go! I always find drawings help me see things better.With moving the kitchen over, having an 11 ft span, using joists 16" OC, 30 lb. load (the usual value for a loft), L/360 deflection, the calculator says: DougFir Select Structural = 2x6 (but that's at the upper limit of recommendations)pretty much anything else = 2x8How's that DF Select price out against lesser grades/species?Re: Scott's comment above. Mark, you mentioned three girders/beams under the main floor joists. Were you going to space them equally across the width, or place the middle one under the 24 foot "mid" wall??I was assuming you'd leave it under what used to be a completely exterior wall. I shouldn't assume.