[underground]

Judging by recent posts it's going to be worth upping the security for my bicycle - the only option I can see due to location etc. is locking the bike to a concrete in anchor. Can't bolt it or chemfix it down as the substrate will be blocks, and there isn't a handy wall nearby.

So - any opinions or experience of concrete in anchors and which ones, stuff to watch for etc?

Thanks in advance as always

[Bubba]

Where's it going to be? Round back of house? Or indoors?

Do you have a cellar?

[underground]

Round back, with a timber shed over it.

[fatboySlimfast]

Can you bolt back of house and put tarp over? Otherwise your going to have to put in a pretty big ground anchor!

[underground]

London bricks, I bet you could pull them out with a car jack... but its slightly possible.

I'm thinking a big fuck off post set into a big fuck off lump of concrete - don't mind digging a big hole but saying that, I don't know what a 'big' anchor actually means. I can do the digging myself with a mini digger so there'll be no spadework involved

[tomtom]

Big = too hard to lift. Lets go for C.100kg.
Compared to water, Density of concrete is c.2-2.5, so 0.1m^3 of concrete ways 2-2.5kg..
So 100kg is a lump of concrete c. 0.35 by 0.35 by 0.35m... Not too huge really...

[underground]

Big = too hard to lift. Lets go for C.100kg.
Compared to water, Density of concrete is c.2-2.5, so 0.1m^3 of concrete ways 2-2.5kg..
So 100kg is a lump of concrete c. 0.35 by 0.35 by 0.35m... Not too huge really...

Doable with a shoveholer and a bit of grunt then... I'd consider doing that with postcrete and a bag of pebbles

[stom]

Big = too hard to lift. Lets go for C.100kg.
Compared to water, Density of concrete is c.2-2.5, so 0.1m^3 of concrete ways 2-2.5kg..
So 100kg is a lump of concrete c. 0.35 by 0.35 by 0.35m... Not too huge really...

But unfortunately not too big to dig out easily(and then break up with sledge hammer to get the post out).  I'd be looking for something a lot more awkward to dig out.  Think something along the lines of a thick concrete slab onto which you can build your shed!

[SA Chris]

The other option is to make it awkward to steal rather than heavy, and chain a length of steel as long as will fit in the shed to your bike.

[slackline]

Or keep it in the house.

[mr__j5]

I have a tarmacced back yard that I dug a 20cm diameter whole in and buried a load of chain a bit like this
(but I think mine is probably thicker links)



in it with just enough sticking out that I could feed it through a hole in the floor of the shed that I then pass a motorcycle heavy duty padlock chain through to attach the bikes.

[stom]

Or keep it in the house.

Best idea by far!!

[Bubba]

Could you get away with something that's in the house but neat and out of the way?

[Oldmanmatt]

Stairwell.
BTD, in student diggs, we rigged pullies in the stairwells to store bikes, Kyaks, surfboards etc.
You make me feel guilty...
My Kona has been sat in front of the house, unlocked, for ten days...
I put it in the garage last night.
Best security measure?
Move to Devon...

[underground]

We have a nightmare for space and storage full stop so keeping in the house just can't happen unfortunately. Am now considering one of the steel lockers from here and failing that may just settle for doing a bit to improve my old hardtail a bit

[Bubba]

I'm sure one of them and a beastly lock would do the job but it's upping your budget considerably. I guess it's something that'd last forever though even if you moved house.

[tomtom]

Problem is steel locker suggests something worth nicking and equals a challenge to the scrotes.. I think the original plan of ground anchor with an anonymous crap shed over it could be best? Or get a nasty vicious mental dog and chain it to the bike

[Oldmanmatt]

Or shed over locker, ground anchor and dog...
And...
Electrify the lot!!

[Bubba]

A Caucasian Ovcharka should do the trick:

[Graeme78]

Fuck me that thing looks like a wolf crossed with a bear or something. Jesus wept you'd shit yourself if that went for you.

[underground]

Settled for an Ovcharka in the end - the food and insurance bill for the year will be collosal, but one the bright side, the bike can stay inside his unsecured kennel 

[sidewinder]

Settled for an Ovcharka in the end - the food and insurance bill for the year will be collosal, but one the bright side, the bike can stay inside his unsecured kennel 

You might still want a d lock for the first year or so?

[gingerninja]

a mate of mine had some box section steel welded in a v shape and sunk that in the the concrete pad for his shed. you can then thread a big chain through it. he also put the u bit from a d lock in the corner where his bike wheel will be for that extra bit of protection.

[Oldmanmatt]

Hmm, use flint agregate in the concrete too.