NEW YORK | World Trade Center Transportation Hub | 46m | 150ft | U/C

[325ccr]

It will be interesting to see if they move the AC500 more west. Seems like a lot of work just to move a few feet. He did take the 760 down right where is now though so only time will tell.

[thejacko5]

i looked at the charts for the AC500 a bit.

i reckon they have been running at around 116' of main (including a 13' lattice neck) and 157' of jib.

if that is true, and that 760d was around 150 feet out, that AC can pick around 70kips.

even if you convert to city charts, that ought to pick even the powerpack for the 1280.

someone more familiar with the site should check my measurements though.

[Beber]

You might be right, because I don't see the AC500 moving anywhere west seeing how much stuff is stored over there. Plus the yellow outriggers (or whatever their name might be) for the new 1280 are already on site, so it's a bit late to move it.

[charger1966]

Looks like the pieces for the second crane base are on site.

[MusicMan84]

http://www.video-monitoring.com/cons...itv/silver.htm

The cam on top of 7 WTC has been repositioned! Hooray! The angle is different than before, but certainly better than staring at a wall. Can't wait for daylight to get a better view.

[webeagle12]

Originally Posted by MusicMan84

http://www.video-monitoring.com/cons...itv/silver.htm

The cam on top of 7 WTC has been repositioned! Hooray! The angle is different than before, but certainly better than staring at a wall. Can't wait for daylight to get a better view.

Thank you

[styler115]

Great !

[Rich-E36]

Mast sections for the next 1280 have arrived.

[PMadFlyer]

Originally Posted by Rich-E36

Mast sections for the next 1280 have arrived.

Tower sections. I was making the same mistake for a while before I caught my self. The mast is the four legged part at the rear of the body that anchors the luffing line, the line that angles the boom up and down.

[abc]

Originally Posted by PMadFlyer

Tower sections. I was making the same mistake for a while before I caught my self. The mast is the four legged part at the rear of the body that anchors the luffing line, the line that angles the boom up and down.

Mast is referred to at the A Frame

[Beber]

The AC500 is being dismantled, and the 1280 will finish erecting its sibling. I assumed it would not be able to do so, but the west crane is much more closer to the center of the oculus than the east one.

[thejacko5]

the mast is the tower.

think of a ships mast.

you can reference section five of this document. http://www.nyc.gov/html/dob/downloads/pdf/cd2.pdf

[Otie]

Pieces of the west abutment area are shorter -thus lighter- than the ones on the east area.

[abc]

Originally Posted by thejacko5

the mast is the tower.

think of a ships mast.

you can reference section five of this document. http://www.nyc.gov/html/dob/downloads/pdf/cd2.pdf

Yep that's right, and the 4 legged bit referred to above in a previous post is the A frame. At least that's what we call it here

[PMadFlyer]

Maybe it was just one of the crane product guides I was using. I swear I saw it reversed.

[325ccr]

Some times you see guys calling it a mast, some times they call it a tower. Some times it's a a-frame or some times it's a mast.

Personally if it's shaped like a A I will call it a A frame (or if it's on a tower crane since I always call the tower sections a mast)

Anyway back on topic- it is me or do the blue masts on the west look smaller then M1280's?

[oli83]

Originally Posted by Otie

Pieces of the west abutment area are shorter -thus lighter- than the ones on the east area.

Is this asymmetry also the reason why the crane base (the yellow steel parts) are slightly asymmetric?

[thejacko5]

another question.

If the major connections are in fact welded, should we expect to see a major temp shoring operation?

Im thinking yes, unless they have design some serious temp connection plates and bracing.

[Swiddle]

Originally Posted by 325ccr

Anyway back on topic- it is me or do the blue masts on the west look smaller then M1280's?

It certainly looks smaller to me, and possibly more rectangular in shape.

What is the make/model of the corner crane for 3WTC? Its mast looks to be at least as big as the M1280's even though the crane itself appears quite a bit smaller.

[Beber]

They're the same size. If you want to compare, here are two pictures of both mast section, with the same zoom. Keep in mind the west crane is further.