Bicycle shelter/shed (5.5' x 7') on uneven surface (8% slope)

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GregorHochschild

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Hi,

not fine woodworking at all but maybe someone is still able to help me with this. After our electric bikes almost got stolen, we need to upgrade our bike storage from a cheap collapsing plastic tent to a lockable shed. However, I am struggling with the best way to install and secure it. The attached picture shows you the space and outlines my current framing plan. The front is about 7'' lower than the back. We don't want a full concrete pad and we do not need a floor. I am thinking about pouring concrete columns in three locations (back right at 0 already has concrete that I can use) and securing the framed walls directly to the concrete with the ABA standoff post base for 4x4 lumber (link). The double 2x4 from the side walls should fit in there well.

Does this sound like a decent plan? Anything I am missing here?

Thanks!
 

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Have you considered pouring another concrete pillar in the center to house a few masonry grade bike anchors?  That or join the two at the back and house a few anchors in a row.
 
woodferret said:
Have you considered pouring another concrete pillar in the center to house a few masonry grade bike anchors?  That or join the two at the back and house a few anchors in a row.
Click to expand...

Thanks! There already is a bike rack secured in concrete under this flimsy tent... So I think we are good on that. Now we want a shed structure around the bike rack for more security...
 
Sorry I missed that in the pic. 

As for the structure... I'm a bit hazy on the front door opening and how the jack and king is floating considering the corners should be elevated off grade. Unless of course the front sill is detached and mostly hanging and using PT ground contact, but then you're at risk of puddling behind it if that's the case... but then you're going through the trouble of doing corner posts right...
 
Yes, the door framing would be floating. There also would be a gap between the siding and the ground pretty much all around. Do you see a problem with that?

Edit: for clarity, the shed would only rest on the four corners. The would be off the floor
 
Yes, a standard 2x4 top plate will sag as it's taking all the gravity loads from the entire wall downward, along with the roof load.  Beef up the top plate more like a beam post to post.  Then hang the door opening and front wall from that.  The header and all that jazz for door openings is for compressive loads so you can skimp there to lighten the load.

If it's easier to understand, think of yourself building a deck that's the height of the roof line.  Everything under is hanging and in tension.  All loads are transferred from the roof beams to the posts and down into the concrete columns.
 
How is the roof of the shed draining?  It appears flat, but perhaps the roof was left off for the sake of simplifying the drawing to post on here?
 
If you are mostly worried about people steeling the bike in its entirety, rather than stripping the brakes, derailleur, tires, etc., then a single anchor in the middle will allow you to securely chain the bike in place. 

If the current base is asphalt, they makes special asphalt anchors. 
https://www.googleadservices.com/pa...=2ahUKEwigr5OfuJ_-AhVKF1kFHUPMDP4Q0Qx6BAgHEAE

If it is concrete, you would have to drill and pour new concrete around an anchor.

They do make “bike lockers”, a google search shows many vendors.  But pricey, starting at around 2,000.00.
https://www.google.com/search?q=bicyce+locker&client=firefox-b-1-m&ei=WRI0ZITrOqKq5NoPlsmQ-AU&ved=0ahUKEwjE-5TouJ_-AhUiFVkFHZYkBF8Q4dUDCA8&uact=5&oq=bicyce+locker&gs_lcp=Cgxnd3Mtd2l6LXNlcnAQAzIHCAAQDRCABDIHCAAQDRCABDIHCAAQDRCABDIHCAAQDRCABDIHCAAQDRCABDIHCAAQDRCABDIGCAAQFhAeMgYIABAWEB4yBggAEBYQHjIGCAAQFhAeOgQIABBHOggIABCKBRCGAzoTCAAQDRCABBCxAxCDARCxAxCDAToHCAAQgAQQDToTCAAQgAQQDRCxAxCDARCxAxCDAToNCC4QDRCvARDHARCABDoNCC4QgAQQDRDHARCvAToOCAAQigUQsQMQgwEQkQI6CAgAEIoFEJECOgoIABCABBDJAxAKOggIABCKBRCSAzoNCAAQgAQQsQMQgwEQCjoHCAAQgAQQCjoKCAAQgAQQsQMQCjoQCC4QgAQQxwEQrwEQ1AIQCjoQCAAQgAQQDRCxAxCDARCxA0oECEEYAEoFCEASATFQ0AxY2S5gtTdoAHACeACAAXaIAacPkgEEMjIuMpgBAKABAcgBCMABAQ&sclient=gws-wiz-serp
 
Resin garden sheds are waterproof and modestly secure.  You would still want to lock the bike to a fixed anchor.  Much cheaper than the bike lockers, and quick and easy to install.  Withe the price of lumber nowadays, probably cost effective too.

I see some of the smaller sheds for $600.00.
https://www.google.com/search?q=resin+garden+shed&client=firefox-b-1-m&source=lnms&tbm=isch&sa=X&ved=2ahUKEwj_gOWW4J_-AhXrF1kFHbFpCEAQ0pQJegQIBBAE&biw=1283&bih=817&dpr=2
 
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