Long span cassette floors

[birmühendis]

Hello friends, I want to consult a topic and I need your help. The facade of a building where a multi-purpose hall will be built is 40 m and 23 m wide. In architecture, columns in the middle of the building on the last two floors are not desired. As a result of my research, large span structures can be made with cassette flooring, but I encountered many problems in the statics I made. Frankly, I do not know if cassette flooring in such a wide span structure would be healthy, I would appreciate it if you could help. Thank you.

 

[yunussacikk]

Re: LONG SPACE CASSETTE FLOORINGS you can precoat your final flooring. Or you can use post tensioning

 

[zalman]

Re: LONG SPACE CASSETTE FLOORINGS

Hi guys, I want to consult a topic and I need your help. The façade of a building where a multi-purpose hall will be built is 40 m and 23 m wide in architecture. Columns in the middle of the building on the last two floors are not desired.As a result of my research, wide-span structures can be built with cassette flooring, but I encountered many problems in the statics I made. Frankly, I do not know if cassette flooring in such a wide-span structure would be healthy. Hello, when I first look at your structure, I think you should get help from an experienced person. I solved it like this, the cross-sections are not a sufficient system. The beam sizes are not very clear from the photo anyway, but you have to pass these openings with huge beams. I don't know where your region is, but there are no rigid elements in the system. especially in the corners, it is supported with curtains or a steel system. I think it will be useful. As the dolphin brain says, post-tensioning can be done, but you can get a better system by modeling the whole system, not just modeling that part. If it is not necessarily reinforced concrete, steel can be preferred. If different friends share their information, you can get ideas from here. In my opinion, cassette floors are an advanced subject, they should be well designed, well investigated and well drawn. Good work...

 

[birmühendis]

Re: LONG SLOP CASSETTE FLOORING

Hi guys, I want to talk to you about something and I need your help. The facade of a building where a multi-purpose hall will be built is 40 m and 23 m wide. In architecture, columns in the middle of the building on the last two floors are not desired. As a result of my research, large-span structures can be built with cassette flooring, but I encountered a lot of problems in the statics I made. Frankly, I do not know if cassette flooring in such a wide-span structure would be healthy, if you could help me, I would appreciate it. Thank you.

Hello. I think it's necessary. This is how I solved it, sections are not a system that can be called sufficient. The beam dimensions are not very clear from the photo anyway, but you have to cross these openings with huge beams. I do not know where your region is, but there is no rigid element in the system, I think it would be beneficial to support such systems with curtains or a steel system, especially in the corners. As the dolphin brain says, post-tensioning can be done, but you can get a better system by modeling the whole system, not just modeling that part. If it is not necessarily reinforced concrete, steel can be preferred. If different friends share their information, you can get ideas from here. In my opinion, cassette floors are an advanced subject, they should be well designed, well investigated and well drawn. Good work...

Thank you for your comment. I'm doing a preliminary study right now, yes, cassette laying is an advanced subject, frankly, I'm trying to improve myself and it would be great if those who have knowledge on this subject enlighten me.

 

[sahinsukru]

Re: LONG SLOP CASSETTE FLOORING

Hi guys, something I would like to consult and i need your help. The facade of a building where a multi-purpose hall will be built is 40 m and 23 m wide, the columns in the middle of the building on the last two floors are not desired.As a result of my research, large span structures can be built with cassette flooring, but I encountered a lot of problems in the statics I made. I don't know if cassette flooring in a spanned structure will be healthy, I would appreciate it if you could help. Thank you.

Hello, when I first looked at your structure, I think you should get help from an experienced person. I solved it like this, the cross-sections are not a system that can be called sufficient. The beam dimensions are not very clear from the photo, but it is huge You have to pass these openings with wide beams. I think it would be beneficial to support it with curtains or a steel system in parts of it. As the dolphin brain says, post-tensioning can be done, but you can get a better system by modeling the whole system, not just modeling that part. If it is not necessarily reinforced concrete, steel can be preferred. If different friends share their information, you can get ideas from here. In my opinion, cassette floors are an advanced subject, they should be well designed, well investigated and well drawn. Good work...

Thank you for your comment. I'm doing a preliminary study right now, yes, cassette laying is an advanced subject, frankly, I'm trying to improve myself and it would be great if anyone who knows about this can enlighten me.

[url =https://onedrive.live.com/?authkey=%21AN9SqgEMu3u%2DC%5Fo&cid=5080B3DEBE147FF9&id=5080B3DEBE147FF9%2122731&parId=5080B3DEBE147FF9%215665&o=OneUp]https://onedrive.live=%21au? 65&o=OneUp[/url] Uğur Ersoy - Reinforced Concrete 2 Page 47 ( A bit old , some formulas may need to be updated. -TS500 )

 

[NYILMAZ]

It would be a very serious adventure to try to solve such a wide opening in reinforced concrete with a simple and classical column-beam logic. As other friends have mentioned, you will encounter gigantic dimensions for all elements. If there were no single openings, but multiple openings in both directions, perhaps a more acceptable system could be designed in terms of building behavior. I can't "guess" the behavior of those columns when it's the only span. I can more or less predict what you will encounter in the mid-column areas. The subject of deflection is another matter. These are all what we can see in the more static state. If this is on a building and the earthquake situation will also come into play (of course), the situation will become much more difficult. It is not something that will happen when the architect says we don't want it. For this, you need to try steel etc. other methods. When you say multi-purpose, what purpose (!?) will it be able to serve? The area you are talking about is an area of almost 1000 m². Areas such as the gym are of this size, and their designs are also different. N. YILMAZ

 

[zalman]

Hello again... Your build will probably be something like a ballroom. I don't know what stage you have brought your building to, but add your model and requests and let's comment on it. There are more experienced friends in the forum... Floor heights, desired net height, purpose of use, parameters... Good work...

 

[birmühendis]

Hello again... Your building will probably be something like a ballroom. I don't know what stage you have brought your building to, but add your models and requests, let's comment on it. There are more experienced friends in the forum... Floor heights, desired net such as height, purpose of use, parameters... Good work...

Hello friends, thank you for your attention. First of all, this project is planned to be a hotel project in the southeast anatolia region. ballroom style), actually the desired span is 40-50 m, the floor height is 7 m, the dilatation part of the hall is z+4, but apart from that, I was wondering how much safer opening I can pass in terms of working with cassette flooring etc. system. I am working on it. Even in this case, the beam height is not less than 1.50 meters, not to mention the errors of columns, curtains, irregularities, floor offsets. The requested 50 m is too wide and the project is already under draft. I am trying to adapt it in a way that I can solve the static in a healthy way. As far as I have researched, cassette flooring can be passed up to 25 meters, but its carrier system, concrete, deflection etc. are important. Even though there will be such clarity, I think that it cannot be passed only with reinforced concrete, or if there is any other way, I would appreciate it if you enlighten us in terms of information.

 

[a_bulut06]

hello, we have passed such long spans before, it has been implemented and is currently in use. (the roof of the building is in use) beam sizes: 60/180, column sizes 60/180 instead of cassette, we divided the floor with small beams ourselves. The important thing here is that the application is up to the skills of the molder and the blacksmith. +beam was reverse deflection. + stirrups were tightened + concrete pouring was made in layers + upper reinforcements were laid at least as much as flat reinforcement

 

[zalman]

Hello again... Your build will probably be something like a ballroom. I don't know what stage you have brought your building to, but add your model and requests and let's comment on it. There are more experienced friends in the forum... Floor heights, desired net height, intended use, parameters... Good work...

Hello friends, thank you for your interest. First of all, this project is planned to be a hotel project in the southeast Anatolian region. When we say multi-purpose hall, it will be the combination of 3 halls (theatre, ballroom style), actually the desired span is 40-50 m, the floor height is 7 m, the dilatation part where the hall is z+4 but I apart from that, cassette flooring etc. I was wondering how many safe spans I can pass in terms of working with the system. I am working on it, even in this case, the beam height is not less than 1.50 meters, not to mention the errors of columns, curtains, irregularities, floor offsets. The requested 50 m is too wide and the project is already in the draft phase, the statics are healthy. I am trying to adapt it as I can solve it..As far as I researched, cassette flooring up to 25 meters can be passed, but its carrier system, concrete, deflection etc. are important. Even though there will be such a clearness, I think that it cannot be crossed only with reinforced concrete, or if there is any other way, I would be very happy if you enlighten us in terms of information. Good work

Hello... 40-50 m seems like a dream... So even a bridge in the form of reinforced concrete is difficult. In my opinion, it is done :d So unless there is a special shell system (Arch, Dome, etc.), it does not seem possible to pass a 50 m span. Even post-tensioning seems to be very difficult. If the conditions are too difficult, return the job, I think