Ground anchor installation help

Hi all,

Looking for a bit of advice. I want to install a ground anchor in my shed, its sat on a concrete base, but my shed floor is around 2 inches from the concrete base.

I'm going to cut out a square in the floor, then I was going to box it off and fill with more concrete, then drill through both the new concrete and existing base and install resin fixing bolts.

My other idea to make life a bit easier is to cut a square and just place 2 concrete commons side by side, drill through these and the existing base using the same technique? Good / bad idea?

Might be misunderstanding your method - seems you are only securing the floor, not the frame.

With a long masonry drill bit I would drill through floor and the joist that is sitting in the ground, and into the concrete.
Put in a long 10mm resign fixed bolt into the concrete and let it set.
Put a large washer and nut onto bolt, pushing down on the floor and joist.
SFK

Sorry, I explained this wrong. It's not to anchor the shed down, but its an anchor point to chain items to for security.

Just cable them together. I have a 3 metre steel security cable in my garage and that goes through three bikes, a pressure washer and a set of triple ladders. Unless they can snap the cable or padlock, they’d have a bit of trouble getting that lot out in one go!

Mottie said:

Just cable them together. I have a 3 metre steel security cable in my garage and that goes through three bikes, a pressure washer and a set of triple ladders. Unless they can snap the cable or padlock, they’d have a bit of trouble getting that lot out in one go!

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Agree and if you lock an alarm padlock on the cable anyone touching anything will set it off.

If you are pouring the concrete, you can set your anchor(s) directly in it, no need to drill and screw separately.

You can put a short length of anchor chain in, or a heavy steel object, or a "U" shackle lock with just the top of the shackle projecting. I'd paint it first to resist rust. As you will not have to carry the lock and chain with you, you can use thick, heavy materials.

The ringbolts used by scaffolders can be very big.

You can recess your anchor slightly below the surface so you don't trip over it so often, and it will be harder to get at the padlock. Consider putting one in each corner,

If you are anchoring some object popular with thieves, they can snip through a cable in seconds, and can also muffle a noise-maker with ease.

A trick I learned on safe installation from an old locksmiths book, is that if you put it in a tight corner, the villain has less space to use his tools, and if you paint the floor, walls, lock and chain matt black, it is harder for him to see what he's doing.

A biker friend kept his machine at the back of the garage, with a car in front, and thieves carried it out over the car. They had the advantage of not being concerned about dents and scratches.

Thanks everyone. The main issue I have is that I already have a concrete base so the extra 2 inches is just to bring it level with the floor, I want the anchor bolts to go through both the new and existing concrete so it has at least 4 inches of bolt into the concrete.

That's why I was wondering if instead of pouring more concrete I could just place a concrete block to bring it up to level and drill through the block and old concrete and put a bolt through both?

I've already purchased a specific anchor for the task.