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Footing for Brick masonry wall
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hmraval
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PostPosted: Wed Nov 25, 2009 2:25 pm    Post subject: Footing for Brick masonry wall Reply with quote

Hello

From where on internet or which book i can get the calculation detail of footing for Brick/stone Masonry wall.

I have to design it only for boundary wall(Ht. 1.8Mtr. above GL and for Partition inside Garden(Ht. of wall is 500mm and 200mm above GL)

Total length of boundary wall is 400Mtr.Stone Masonry and 175Mtr. partition wall of Brick Masonry.

THANKS AND REGARDS,
Hiren Raval
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sspawar
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Joined: 05 Jun 2009
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PostPosted: Wed Nov 25, 2009 5:15 pm    Post subject: Reply with quote

Dear Friend,
There are some standard format- depends on soil/strata.
for coastal area  - make out  6 met pilings 450 or 300 dia at avery 4.5 to 6met or so place plinth beam above or below GL suitable then raise square or rect column and in bet brick work of 1 and half.
I think it is your case.
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skhalid
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PostPosted: Thu Nov 26, 2009 5:14 am    Post subject: Reply with quote

Dear Mr. Raval,

As you have not told of the bearing capacity. I presume it is good enough. In that case u have to provide R.C.C. Strip/Line footing at sufficient founding level.

But u have to break the wall in its length by providing intermediate columns which in turn will be connected by each other through tie beams.

You can refer any book, many books are there like Sushil Kumar

Regards
S.M.Khalid
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Sankara Gullapalli
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PostPosted: Thu Nov 26, 2009 6:08 am    Post subject: Footing for brick masonry wall Reply with quote

Dear Friend
Suggestion by Sri Pawar could be followed in swelling soils e.g. Black cotton soils.
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vikram.jeet
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PostPosted: Thu Nov 26, 2009 6:13 am    Post subject: Footing for Brick masonry wall Reply with quote

Mr Hiren raval,

Please see the expanatory code on Wind load SP-64 wherein deaign of  
boundary wall has been given in an example.

In boundary walls, expansion gaps (12mm) shall be provided after every
10-15m length. The expansion gap can start above the GL.

regards

vikramjeet

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mks
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PostPosted: Thu Nov 26, 2009 4:09 pm    Post subject: Reply with quote

Dear Mr. Pawar,

Is it not too much to provide 6m  pile of 450 mm to 300 mm dia at 4.5 to 6m to cater the load of compound wall of only 1.8 m high.

Regards

Mithilesh

sspawar wrote:
Dear Friend,
There are some standard format- depends on soil/strata.
for coastal area  - make out  6 met pilings 450 or 300 dia at avery 4.5 to 6met or so place plinth beam above or below GL suitable then raise square or rect column and in bet brick work of 1 and half.
I think it is your case.
Regards
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sspawar
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PostPosted: Fri Nov 27, 2009 1:38 am    Post subject: Reply with quote

Dear MKS
It is not a matter of receiving the load of wall.
It is for lateral stiffning.piles are friction piles also.

Further at every 45-to 50 met wall should be seperated (expansion joint) (two col side by side)

Mr Raval also wrote for garden brick perapet partitions.
This does not require such provision or any high fye engineering.  it can be made by Mason himself as per site condition and general need on basis of archi sketch.
regards
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manieck2010
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PostPosted: Wed Sep 08, 2010 6:35 am    Post subject: Reply with quote

Hello,
But for lateral stiffness we can give a tie beam at pile cutoff level and can be reduce no. of pile.




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Manish Khandelwal
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umeshrao
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PostPosted: Wed Sep 08, 2010 7:57 am    Post subject: Re: Footing for Brick masonry wall Reply with quote

hmraval wrote:
Hello


THANKS AND REGARDS,
Hiren Raval
09909908607

Dear Mr. Hiren,
Sp-64, an explanatory handbook on wind as per IS code 875 has given how to calculate wind load and hence forces on the compound wall. These forces shall be used for deign of masonry [Bricks, Stones, Concrete blocks- normal as well as light weight] as per IS 1905.
     Using  forces coming on the compound  transfer forces to masonry and design foundations again using IS 1905- Code for  masonry design.
     Loads acting on the foundation will be horizontal due to wind and hence will produce moments on the foundation. Self wt of the compound wall as well as foundation will act in the gravity direction.
     Pressure on the soil can be calculated as normally done. P/A[ -+] M/z. Stepping  in the masonry foundation is done keeping dispersion of load in the subsequent layer of masonry by considering 1H : 2 V.
This is necessary to avoid bending of layers as done in corbel.
     Permissible stress in compression, tension and shear has been given in IS 1905.
     Design of masonry will be similar using P/A [+ or -] M/Z. Therefore, axial compressive stress and tension will not exceed that is permitted. I am of the opinion when M/Z > P/A i.e. tension exists contact length will be at least 70% of the total length. The contact length may be found out by finding eccentricity = M/P and using Sigma V =0 [that is addition of vertical forces to 0] you will get length of contact.
     Regards Umesh Rao
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Dr. N. Subramanian
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PostPosted: Wed Sep 08, 2010 5:29 pm    Post subject: Re: Footing for Brick masonry wall Reply with quote

Dear Er  Hiren raval,

You may also refer Dayaratnam,P., Brick and Reinforced Brick Structures, Oxford & IBH, 1987, Chapter 3

Best wishes
NS

vikram.jeet wrote:
Mr Hiren raval,

Please see the expanatory code on Wind load SP-64 wherein deaign of  
boundary wall has been given in an example.

In boundary walls, expansion gaps (12mm) shall be provided after every
10-15m length. The expansion gap can start above the GL.

regards

vikramjeet

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