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spsvasan
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Joined: 18 Dec 2008
Posts: 378
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 Posted: Sat Nov 11, 2023 2:48 am Post subject: Re: 16m X 16m hall design without center column support |
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| ramu_se wrote: | Dear All,
Shall we design a 16m x 16m hall without any center column support?
Will it be economical to use the larger size column on both ends or a flat slab system?
Kindly guide me on this.
Thanks & Regards,
Ramu. |
Dear Er.Ramu
As suggested by many SEFIans, coffered ceiling is the best solution. A few additional points....
In such huge spans, apart from structural design, the checks for deflection and vibration become important.
After deshuttering the floor will undergo significant deflection. If suitable camber is not provided, the thickness of floor finish will be high at the centre. This will lead to a pyramidal load on the flooring. This has to be considered in the design and the reinforcements will increase.
The problem is more severe at the roof level to ensure proper drainage of rain water.
The camber should account for creep deflection also.
The other problem is vibration. Unless adequate beam depth is provided, if a person jumps at the centre of the hall vibration will be felt. While this may not result in failure, the psychological aspect of the vibration cannot be neglected.
Regarding the geometry of the grid, one may also consider a diagrid system where the beams run at 45 degrees to the sides of the hall. This will be more pleasant to look at.
S.P.Srinivasan |
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manoj jain
SEFI Member
Joined: 22 Jun 2009
Posts: 8
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| Posted: Sat Nov 11, 2023 11:30 am Post subject: 16m X 16m hall design without center column support |
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Why not go for steel structure?
On Thu, Nov 9, 2023 at 4:13 PM AshokaSE <forum@sefindia.org (forum@sefindia.org)> wrote:
[quote] Dear sir
Coffer slab is better if aesthetic importance is a priority else with minimum slab thickness, slab and Beam at intervals is the economical way of designing the slab of 16 m x 16m.
regards
Ashoka S E
On Wed, Nov 8, 2023 at 3:32 PM rajancivildesign@gmail.co (rajancivildesign@gmail.co) (rajancivildesign@gmail.co (rajancivildesign@gmail.co)) forum@sefindia.org (forum@sefindia.org))> wrote:
| Quote: | Dear Sir,The hall can be designed as without intermediate column with grid floor
slab with 2m spacing beam with nominal slab thickness say 80mm /100 mm.
you can also provide intermediate regular beam dividing hall into 3 or 4 span on one side..
But beam is not preferable in a hall. You can go for grid floor.
V.M.RAJAN
On Wed, Nov 8, 2023 at 9:52 AM ramu_se forum@sefindia.org (forum@sefindia.org) (forum@sefindia.org (forum@sefindia.org)))> wrote:
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abhio
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Joined: 08 Mar 2010
Posts: 547
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| Posted: Mon Nov 13, 2023 6:42 am Post subject: |
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The Concrete Centre publication "Economic Concrete Frame Elements to Eurocode 2" [ISBN 978-1-9046818-69-4] gives some useful guidance on long span floors.
Please also look at the "Guide to Long-Span Concrete Floors" by the Cement and Concrete Association of Australia [ISBN 1-877023-09-4].
One-way prestressed hollowcore slabs can easily span 16m or more depending upon the superimposed dead and live loads. |
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narayanamt
SEFI Member
Joined: 05 Jan 2011
Posts: 4
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| Posted: Mon Nov 13, 2023 9:30 am Post subject: 16m X 16m hall design without center column support |
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On Wed, Nov 8, 2023, 15:34 rajancivildesign@gmail.co (rajancivildesign@gmail.co) <forum@sefindia.org (forum@sefindia.org)> wrote:
[quote] Dear Sir,The hall can be designed as without intermediate column with grid floor
slab with 2m spacing beam with nominal slab thickness say 80mm /100 mm.
you can also provide intermediate regular beam dividing hall into 3 or 4 span on one side..
But beam is not preferable in a hall. You can go for grid floor.
V.M.RAJAN
On Wed, Nov 8, 2023 at 9:52 AM ramu_se forum@sefindia.org (forum@sefindia.org))> wrote:
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