building a pole barn on a existing slab???
Thought about this deal more while I was outside just now,,,I would NEVER build another with poles in the ground. I have a 40X 60 right now with 20 foot sidesheds on both sides,,,its too small.
Any chance you could go 40 wide?? Makes a world of difference inside. They MAKE concrete piers you bury instead of the poles then they have brackets for 6X6 square poles like Morton sheds. they set in bracket a foot off the ground,,,wont rot off,,,poles will!!
This shed was torn down from a salvage yard shed where a Hardies ended up. So was dismanteled piece by piece and reassembled. IT had ring shank nails from pole to roof truss couple bolts would be better,,in fact I have many old electric pole bolts. Anyway the poles are 10' on center with homemade trusses on those poles,engineered trusses would e even better,,,5 /12 pitch minimum 6 /12 better. Then make the buildioing at LEAST 14' high(sidewalls) 16 or 18' better yet every 2 foot up these trusses the scabed a 2X4 cleat on side and nailed it to 20 foot purlins 2X4 again on edge with roof tin nailed on it. Higher sidewalls and you can build side sheds for cheap later. when you run out of room inside.
Be ruthless about not accumulating junk in your shed or its full before you know it.
IF you could add 10 foot on onto one side or the other or 5 to each side so much the better. Plan out a BIG door and a little door on downwind side if possible!!20 foot wide isnt too wide. use these on the end walls easier.
Put a loft inside up high on one end or both to store little stuff ...Can put ceiling underneath that and heat that area with drop curtains on 2 sides. and loft should sport nice steps to walk up and down. shelves and old kitchen etc cabinets down one wall. Bench under big windows. Find an old 4 " pipe and bury in concrete with enough space to work around and put a vice inside on there. Then you are all set to do most anything in there. Most sheds are built too small after 10-20 years of use!!