Will the next perimeter jump take us up to 93, or can we expect to go up to 100?

An average mechanical floor is two office floors high so they put an M floor in between, because of this the M floor counts as a floor too. So it would be 92, 92M (93), 93 (94) 93M (95), 100 (96), 101 (97), 102 (98), 103 (99), 104 (100), and 110/Platform (101). This building if counted would have only 101 floors not 104, but it's still close enough.

For telecommunications, or the broadcasting of signals over long distances.

Next Jump: 93 & 93M
Jump 2: 100 & 101
Jump 3: 102 & 103
Jump 4 (Final Jump): 104 (One World Trade Center is officially topped off.

Thanks for the explanation. Still seems a little strange to me but what you've said has helped in my understanding.

It may be close enough,but they didn't need to lie about it. Most people are going to think this building will have 104,105,108, or even 110 like the former Twins. I don't think it makes sense for them to count mechanical floors as 2 floors because they are really just one floor twice the height. I just don't see the logic in it. Seems that every tall building has to lie about some aspect to make a statement. Sorry if this rant bothers some people but this one of the few main problems I have with this building. It had a chance to succeed all the way and it failed in many respects.

We are at floor 93 as of right now so possibly the next jump will bring us to 100. The 105th floor at 1,334' 8" is considered the roof of the building and then there is the parapet that will bring it up to 1,368'. The 1,368' mark will be the topping off point. The 104th floor will be 1,313' 10".

Unbelievable. The last 4 pages have been people asking the same questions repeatedly and postulating the same arguments that we have talked about for a decade now. Read the thread, guys.

By the looks of it, can someone give me a mere precise speculation date on when 1WTC will be "topped out" now seeing that we are at the next jump?

Perhaps you could, I don't know, read the thread? It might be illuminating. No one knows with absolute certainty when the next jump will take place. Or when the topping out will take place. Countless people have estimated anywhere from April 2012 to early 2013. There is no way of knowing for sure unless you work on the project.

I also counted the perimeter columns of 93 which hasn't been completed yet, and the next jump won't bring us to 100. The next jump would still be a mechanical floor because it's 2 floors a week, and mechanical floors are equal to 2 office floors.

The column splices are at 1,216' as of right now so the next set of columns are likely over 30' so it will probably hit 1,240'. The last set of columns consisted of 91, 91M, and 92. These columns now are for 92M and 93. Then you have 93M and 100.

I've just re-read the past five pages. Not once does anybody explain why there are no floors 94-99. Nor is it explained why the numbering jumps from 93 to 100. So my question was a new and legitimate one to ponder.

Perhaps this was covered years ago, but you can think again if you want me to read through 20,000 posts just on the off chance I might get an answer before asking. Read what was actually discussed before you complain about the discussion topics. Or better yet if you've nothing constructive to add, remain quiet. Thank you.

*Practice patience, Otie, practice it*

Floor skipping is a common trick used in almost every skyscraper (even the ESB does), there are no floors numbered as 94-99 nor 7-19. This tower couldn't have 110 real floors because it's self-contained, meaning that it has all the mechancial and electrical needs inside the building, they couldn't just spread them around the tower due to the reduced space, remember folks that this is one of the most complex (if not the most) site in the world, if you move one tinny beam, you're affecting the surrounding projects. Add also the fact that this tower is going to be a certified LEED building, extra infrastructure unavoidable.


The M stands for mezzanine, a partial floor that doesn't extend to the perimeter columns or that doesn't occupy the entire area. Tower One has 85 real floors with 10 mezzanines (4 of them aren't counted actual mezzanines due to the reduced size).

I think the floor count of 104 is just an equivalent in feet for what a 1300' building might have. It is not based on actual floors in this situation. If 1 WTC had 12' floors above the 60' lobby all the way to 1,368' That would be 109 floors like the twins did. But each floor here is taller as most of us know so we get the same height in feet with less floors and they skip floors 94-99 because on floor 93 you are really equal in feet above the lobby to 99 floors up in some other buildings and floor 100 here is at 1,240' and floor 102 at ESB for example is lower at 1,224'. That is why i think that is done. The height above the ground in feet or meters equivalent.

Sure, there aren't any floors 94-99 because that is how the Port Authority chose to number it.

I hope this helps just a little.

There is also a second twist. The Twin Towers were built with a lower floor to ceiling height. This lower height allow the addition of more floors making it number 110. If a 110 story building was built today as an A class office building it would be at least 1,600 feet tall. The Twin Towers were new then, but by 2001 were already outdated by 28 years. There were plenty of new skyscrapers that were proposed or built that past them in the quality of office space. The only reason why the Twins were full were because leasing them was cheaper that leasing a small 5 story building down on the street below.

One World Trade Center is different too because it's being built as an A class office space building, because of this less floors were needed to have it reach the height the Twin Towers did. Even though the floor count might only be either 95 to 101 with the Mezzanines it's still the same height as the old Twin Towers were and the view is almost the same since they reach at about the same height.

Here is the stats.

1) The floor to ceiling height for the Twin Towers were 12 feet.

2) The floor to ceiling height for the new One World Trade Center is 15 feet.

Actually with all due respect, The New Tower 1 WTC floors are 13 feet 4 inches tall, not 15 feet.

From slab to slab, yes 13'-4". From slab to ceiling is 9'-2"

Otie: Do you know the slab to ceiling height for the 13' 4'' office floors in 1WTC.