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Old August 14th, 2012, 03:58 PM   #3141
marcatio
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600West218,

I did not see what was being offloaded, but perhaps you saw the drill used to drill the footing pad yesterday. This morning, the drill was walked up the ramp. and parked on the street for removal. The grout mixer is a small machine.
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Old August 14th, 2012, 03:59 PM   #3142
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ok, thanks. It must have been the drill. It was pretty big and apparently it was being loaded on the truck rather than taken off it.
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Old August 14th, 2012, 05:39 PM   #3143
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Concrete is now getting poured into the two easternmost of the five south tower footings. The trusty, reliable Hitachi once again turns its handy bucket around to receive concrete at the street for the pours. Meanwhile, at the street, the triple-boom Hitachi that served so long on this job as a crane, wields a bucket for truck-loading duty, digging the remains of the ramp.
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Old August 14th, 2012, 06:40 PM   #3144
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Exactly, the last footing at the south east corner in now being filled.
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Old August 14th, 2012, 06:58 PM   #3145
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432 Park Avenue seen here in rendering of possible Manhattan 2040, based on Bloomberg's Upzoning of Midtown East

http://ny.curbed.com/uploads/midtowneastrezoneafter.jpg

Last edited by wnweber; August 14th, 2012 at 07:00 PM. Reason: photo missing
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Old August 14th, 2012, 08:21 PM   #3146
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All of the five south tower footings have been concreted. The waterproofing membranes are being replaced to the east of the core. Earlier, a sand bed was placed below the piping that had been covered; perhaps the project specifications required a sand bedding, that had not been placed, requiring the removal of the membranes. Two trash skips, filled with sand stand by. The same operation of placing sand takes place on the west side of the core. Reinforcing has been placed adjacent to what I believe is an elevator shaft to the west by the west perimeter wall.

The Hitachi 850 wields a hydraulic hammer, working adjacent to the south (56th St) wall.

Meanwhile, the triple-boom Hitachi continues loading trucks at the street.

Rebar placing begins on the far (north) portion of the future slab on grade section. Some thoughts on the piping: I'm not sure, but the piping might be for drainage beneath the slab on grade. The black material placed against the rock surface is probably filter fabric. This filters small particles frock and dirt, but allows groundwater passage. Water flows through the sand by capillary action, and into what may be perforated pipe, then pumped out. Then again, there are several risers (vertical piping) seen protruding through the slab already poured, so the piping could be waste lines.

Last edited by marcatio; August 14th, 2012 at 09:06 PM. Reason: addition
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Old August 14th, 2012, 09:02 PM   #3147
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Quote:
Originally Posted by marcatio View Post
All of the five south tower footings have been concreted. The waterproofing membranes are being replaced to the east of the core. .

I noticed that. A little screw up I guess. Looks like the south side is flattened and ready for the waterproofing material whenever they decide to put that down.
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Old August 14th, 2012, 10:06 PM   #3148
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Thx for all the insightful information marcatio, its great to have commentary while watching the webcam!
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Old August 14th, 2012, 11:12 PM   #3149
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Quote:
Originally Posted by wnweber View Post
432 Park Avenue seen here in rendering of possible Manhattan 2040, based on Bloomberg's Upzoning of Midtown East

http://ny.curbed.com/uploads/midtowneastrezoneafter.jpg
Chryster looks so tiny next to all those buildings

That skinny gray looking building looks like it could be a megatall At least I know the possability of one going up on US soil during my lifetime is higher now.
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Old August 15th, 2012, 12:20 AM   #3150
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The tall grey one by Chrysler, the Guangzhou IFC with a spire, and the one resembling Jeddah's Kingdom Tower on 57th Street look between 1,850 feet and 2,100 feet. I am judging by MetLife, because you can just make out its base. Just stack 1.5 more on top of it and you have 2,025 feet. It, Chrysler, and Trump, three monsters, look tiny!
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Old August 15th, 2012, 02:14 AM   #3151
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What is it exactly that looks like a big mud puddle and/or pile of concrete on the very south west corner of this site? What I've seen in this corner for past few days has been puzzling me.

Also, what do people think? Are we going to get a huge concrete pour this week?
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Old August 15th, 2012, 03:48 AM   #3152
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Counting the spires..it looks we may have THREE Mega-Talls!

I'd be happy with 1 megatall..but ok, if you insist Bloomburger... more than 1 megatall? I guess we're takin' on Dubai and China! Woot woot!
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Old August 15th, 2012, 01:14 PM   #3153
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Come on folks, those aren't proposals, those buildings will never get built. It's only someone's imagination to show that one day there could be towers taller than those which are there now. That's all. One of those "future" towers pasted there is tower from Manhattan West project which is getting built on the west side of Manhattan. It's just a proof how pointless this pic is.
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Old August 15th, 2012, 03:27 PM   #3154
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Wednesday morning at the 432 Park Avenue jobsite.

The slab on grade at the core nears the time that concrete pouring will take place. Rebar being placed on the west side of the core, and high chairs (standoffs used to support the horizontal reinforcement the required distance within the slab) are visible on the east side, with rebar to be placed soon. A pour stop will be installed soon on the south boundary of the slab on grade section to be poured.

The large 56th Street footing is now being formed, with reinforcing to be added.

Against the 56th Street perimeter wall, a lowered section has been excavated.

The triple-boom Hitachi at the street stands by for truck-loading duties.

At present, the Park Avenue cam is non-functioning.

10:21 AM (EST) - Update: There is every possibility that this section of slab on grade will be pored tomorrow. The pour stop has been erected on the left side of the core, and rebar is being placed on the east side of the core, with the pour stop to be erected there. The pouring of concrete in this section will mark another milestone in the construction of the foundation. A sand covering has been placed atop the piping to the south of the core, with filter fabric and waterproofing membrane and reinforcing to be placed for a future section of slab on grade to be poured.

Last edited by marcatio; August 15th, 2012 at 05:29 PM. Reason: addition
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Old August 15th, 2012, 05:25 PM   #3155
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What the heck is the large apparently water filled trench along 56th street for?
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Old August 15th, 2012, 06:37 PM   #3156
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Anyone else with incredibly clear(almost HD ) video from 57th Street camera?


edit
Wouldn't it be possible to have a wide angle on the cam, but when you would zoom in, you could still keep the details?

Last edited by mustang997; August 15th, 2012 at 06:44 PM.
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Old August 15th, 2012, 06:38 PM   #3157
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11:32 AM (EST) - Update: The crushed stone layer is being placed above the filter fabric south of the core. An interesting change of the 57th Street cam shows a closeup of the crushed stone, which was being compacted using a vibratory compactor. I hope the cam reverts to the overall view of the site. The last time the cam showed the 56th Street perimeter wall, the depressed area adjacent to it had forms being erected. The Park Avenue cam is still out of service, hopefully it will return to service, as otherdetails of the construction are now lost to view.

Update: A concrete delivery is preparing to take place, but as a consiquence of the 57th Street cam not showing the 56th Street perimeter wall, where the concrete will be placed is not visible. Not having the two supplimentary cams severely limits the overall observation of the construction.

Work continues on the slab on grade section to be poured tomorrow. The pour stop is being constructed on the east side of the core. The pour stop defines the edge of the slab section, and is made with wood, with holes that allow the rebar ends to protrude through. A keyway (a recessed slot) is formed on the concrete facing side of the pour stop, to which the edge of the future slab to be poured will key into. This is known as a construction joint. The new reinforcing bars of the future slab will lap the bars that will protrude from the poured section of slab, to create a structurally unified slab.

Last edited by marcatio; August 15th, 2012 at 08:24 PM. Reason: addition
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Old August 15th, 2012, 10:01 PM   #3158
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We are getting closer and closer to the day when the entire slab on grade is completed. Crushed stone is being placed on the southwest area, and the crushed stone layer just south of the core over the piping has been completed, with what appears to be formwork for a depressed slab being erected.
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Old August 15th, 2012, 11:01 PM   #3159
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Quote:
Originally Posted by marcatio View Post
We are getting closer and closer to the day when the entire slab on grade is completed. Crushed stone is being placed on the southwest area, and the crushed stone layer just south of the core over the piping has been completed, with what appears to be formwork for a depressed slab being erected.
Just curious, why do you use the word "grade"? I generally think of "grade" as meaning street level and this is about 30 or 40 feet below street level.

Thanks for the updates - fantastic as always.
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Old August 15th, 2012, 11:39 PM   #3160
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600West218,

Grade as used here refers to the rock below that bears the lowest slab in the building, hence the term slab-on-grade. Typically, that slab would be used as a datum, or reference elevation. On a drawing a note may read " Top of slab on grade elevation +217'-0" (datum=0'-0")" The dimension +217'-0" refers to the elevation above sea level. The floor slabs above then are measured from the top of slab on grade elevation, or datum. They would then read (for example), "Top of first floor slab +12'-0" above datum elevation".
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