Exploding patio slabs

[Brewbob]

Having a day off I decided to get a BBQ together. I lit a chimney which I eventually put on the grate. Thinking that wasn't enough I lit another and rested it on the patio. Thankfully I was indoors prepping my beer-can chicken when I heard a big bang, I went out and found my BBQ chimney on its side and a big hole blown into the patio slab from the heat!!

 

[mrbisback]

Concrete and hot things really dont mix, lots of nice airpockets waiting to get warm. Bet it made a great noise

 

[radioactive]

whole new meaning to having a warm spell of weather and hot enough for CRACKING SLABS

 

[Moley]

I've got a few paving slabs going spare which you are more than welcome to have, if you fancy a trip out over the weekend.


In the bottom of my boat, 1.2 tonnes of the feckers, and they've all got to come out now.

According to Google, a 3ft x 2ft x 2in slab (900 x 600 x 50) weighs 64kg, and you would have to get them up 4 steps and down a ladder, but you could have them for free.

Please :pray:

 

[BarnsleyBrewer]

I've got a few paving slabs going spare which you are more than welcome to have, if you fancy a trip out over the weekend.


In the bottom of my boat, 1.2 tonnes of the feckers, and they've all got to come out now.

According to Google, a 3ft x 2ft x 2in slab (900 x 600 x 50) weighs 64kg, and you would have to get them up 4 steps and down a ladder, but you could have them for free.

Please :pray:

Slabs in boat??? :hmm: :hmm:

BB

 

[Tim_Crowhurst]

I've got a few paving slabs going spare which you are more than welcome to have, if you fancy a trip out over the weekend.


In the bottom of my boat, 1.2 tonnes of the feckers, and they've all got to come out now.

According to Google, a 3ft x 2ft x 2in slab (900 x 600 x 50) weighs 64kg, and you would have to get them up 4 steps and down a ladder, but you could have them for free.

Please :pray:

Slabs in boat??? :hmm: :hmm:

BB

A narrowboat is basically a seventy-foot long, seven-foot square tube, and it has a relatively shallow draft (since British canals aren't very deep) which makes it vulnerable to capsizing. Imagine a sausage balloon on the water, and how easily it can turn over and over. If you stuck a line of pennies lengthwise the outside of a sausage balloon and put it into some water, the line of pennies would always be on the underside. Ballast does the same thing: it makes the whole boat act like an elongated weeble - the egg-shaped children's toy that's weighted at one end, so always returns to an "upright" position if you try to knock it over.

The way narrowboat hulls are constructed means that slabs are actually the most practical form of ballast to use.

 

[Zedilly]

So why would you want to take them out :wha: surely it will then become unstable or am I missing something else.

 

[joe1002]

So why would you want to take them out :wha: surely it will then become unstable or am I missing something else.

http://www.thehomebrewforum.co.uk/viewtopic.php?f=10&t=39638

 

[Zedilly]

Now I know why he wants them out :shock:

 

[Moley]

A narrowboat is basically a seventy-foot long, seven-foot square tube, and it has a relatively shallow draft (since British canals aren't very deep) which makes it vulnerable to capsizing.

In our case, 45ft long, but the profile's the same. Sometimes referred to as a corridor in a ditch.

There's going to be something like another 1.4 tonnes of steel welded around the bottom of the boat, therefore removing the ballast should mean that she still floats around the same level.

This is desirable because a), most canals are fairly shallow and some are very shallow, and b), there are intentional holes in the side of the boat not that far above the water line to allow the kitchen sink and wash hand basin to be drained by gravity and the bath / shower tray pumped up and out.

 

[Brewbob]

Put a BBQ chimney on them and blow them all up!