Random Question about Cranes

[Davey S2]

On building sites not wading birds.

How are the big concrete blocks at the one end of them attached?

[Cledus Snow]

Cable ties.

[SteellFJ]

Cledus Snow said:

Cable ties.

close thread!

[Zippyworld]

No more nails

[leigh1050]

I think they sit in a frame and are then bolted in place. Not the best pic but these cranes are on the site next to mine.

[ColinM50]

Duct tape. It holds the universe together

[valiant]

Crane opposite at work and it appears that the concrete blocks are not rectangular but 'T' shaped where the wide bit (the horizontal bit of the 'T') sits on the side of the frame that holds all the blocks in the crane.

[Timmy40]

The force binds everything in the universe together Luke, including cranes and crane weights.

[igiveup]

Head for heights helps

https://youtu.be/oMsNynMknD0

[soad]

Climb on board and see, OP?

[Davey S2]

I have to walk directly under 2 of the bloody things most days and have an image of one of them falling and me ending up like a smear of jam on the pavement.

I can't say that these replies are doing a lot to calm my fears

[Dyl]

As above, some are t-shaped and rest on the frame (but are bolted for security too), others are rectangular - lowered in then pinned/bolted.

I supervised he assembly of one on site yesterday and today. Total weight of the ballast installed on the back of it was 27Te, so I hope it's secure

[Huff]

The bit that goes unsaid with the post above but might surprise those unfamiliar - really big tower cranes are generally assembled by even bigger mobile cranes

[Dyl]

Quite. The mobile crane above is a 300T Grove, which was rigged with 74T of counterweight.

We've an even bigger mobile booked for next week, a 500T with 105T of counterweight, a bit like this one



[/crane bore]

Edited by Dyl on Wednesday 15th July 21:56

[stuartmmcfc]

PVA

[justanother5tar]

Dyl said:

Quite. The mobile crane above is a 300T Grove, which was rigged with 74T of counterweight.

We've an even bigger mobile booked for next week, a 500T with 105T of counterweight, a bit like this one



[/crane bore]

Edited by Dyl on Wednesday 15th July 21:56

Thats cool as fk.

[Monkeylegend]

Dyl said:

Quite. The mobile crane above is a 300T Grove, which was rigged with 74T of counterweight.

We've an even bigger mobile booked for next week, a 500T with 105T of counterweight, a bit like this one



[/crane bore]

Edited by Dyl on Wednesday 15th July 21:56

How much would a days hire cost for one of these? And how many miles to the gallon do they do?

[LordJammy]

I think I'll have one of those when I win the Euro Millions.

[Condi]

While on this thread... how does the crane cope with the counterweight when there is no load on the other end. With such a small upright, surely the crane cant actually support much torque back or forward, and surely with just the weight on the back it'll fall over!!

[Collectingbrass]

Monkeylegend said:

Dyl said:

Quite. The mobile crane above is a 300T Grove, which was rigged with 74T of counterweight.

We've an even bigger mobile booked for next week, a 500T with 105T of counterweight, a bit like this one



[/crane bore]

Edited by Dyl on Wednesday 15th July 21:56

How much would a days hire cost for one of these? And how many miles to the gallon do they do?

Depends what you want to do with it. A straight single lift with no complex flying jib arrangememts or counterweight would be over £2k plus ancillary transport.

And it's gallons to the mile...