[SEFI] BOUNDARY WALL DESIGN
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ashutosh.jain
May 26, 2008, 2:17:15 AM5/26/08
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Dear All,
Is it possible to design a boundary wall in RR masonary
, which is 5mt high from ground level, where can I find the guidelines
or design steps.
I another case the same wall has to retail earth on one side upto top of
wall.
I tried to do some calculations, but found that Tensile stress in mortar
comes very large as compared to permissible tensile stress in mortar(
0.05 N/mm2). I am not sure about the calculation.
Regards,
ASHUTOSH JAIN
Senior Executive - Civil
PTD HA
SIEMENS LTD.
Plot 6A, Sector 18,
Maruti Industrial Area,
GURGAON.
Ph: 0124 - 2846115.
Important notice:This e-mail and any attachment thereto contains corporate proprietary information. If you have received it by mistake, please notify us immediately by reply e-mail and delete this e-mail and its attachments from your system. Thank You.
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Is it possible to design a boundary wall in RR masonary
, which is 5mt high from ground level, where can I find the guidelines
or design steps.
I another case the same wall has to retail earth on one side upto top of
wall.
I tried to do some calculations, but found that Tensile stress in mortar
comes very large as compared to permissible tensile stress in mortar(
0.05 N/mm2). I am not sure about the calculation.
Regards,
ASHUTOSH JAIN
Senior Executive - Civil
PTD HA
SIEMENS LTD.
Plot 6A, Sector 18,
Maruti Industrial Area,
GURGAON.
Ph: 0124 - 2846115.
Important notice:This e-mail and any attachment thereto contains corporate proprietary information. If you have received it by mistake, please notify us immediately by reply e-mail and delete this e-mail and its attachments from your system. Thank You.
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vikram.jeet
May 26, 2008, 6:47:55 AM5/26/08
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Reaining wall design in stone masonry
Please refer IS 14458 on Retaining walls in hilly areas
Also tensile stress for mortar type M1 & M2 can be taken
as 0.10N/mm2 & 0.07n/mm2 resp in vert dir. as per Cl 5.4.2
footnote of Sp-7(NBC)
vikramjeet
Please refer IS 14458 on Retaining walls in hilly areas
Also tensile stress for mortar type M1 & M2 can be taken
as 0.10N/mm2 & 0.07n/mm2 resp in vert dir. as per Cl 5.4.2
footnote of Sp-7(NBC)
vikramjeet
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aman.deep
May 26, 2008, 6:47:51 AM5/26/08
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Dear Ashutosh
Basically you are talking about a 5 m high retaining wall. You may very well design it with various options like RR masonry (as you mentioned), Reinforced Earth walls, Gabians or so. There are agencies specialized with modern techniques who can help you out if your work volume is very large. If it is a small job, you may do it well with suitable RCC wall with counterforts or RR masonry.
In RR masonry, if there is no surcharge load, I hope you should be able to design with wall thickness at base about 1200 to 1500 mm steeped or sloped towards top with thickness at top about 300 mm.
Regards
Aman
Basically you are talking about a 5 m high retaining wall. You may very well design it with various options like RR masonry (as you mentioned), Reinforced Earth walls, Gabians or so. There are agencies specialized with modern techniques who can help you out if your work volume is very large. If it is a small job, you may do it well with suitable RCC wall with counterforts or RR masonry.
In RR masonry, if there is no surcharge load, I hope you should be able to design with wall thickness at base about 1200 to 1500 mm steeped or sloped towards top with thickness at top about 300 mm.
Regards
Aman
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sdec.in
May 26, 2008, 6:47:53 AM5/26/08
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Dear Ashutosh
You may like to follow BIS 1905 with a few adaptations; however the permissible tensile strength in masonry is very very low and needs to be kept in mind while designing boundary walls(try checking it for Wind loads and you will find it even more difficult).
It maybe feasible to change it to a framed RCC construction with Plinth beams and tie beams at top lever to account for all the loads including earth load.
regards
Sangeeta Wij
You may like to follow BIS 1905 with a few adaptations; however the permissible tensile strength in masonry is very very low and needs to be kept in mind while designing boundary walls(try checking it for Wind loads and you will find it even more difficult).
It maybe feasible to change it to a framed RCC construction with Plinth beams and tie beams at top lever to account for all the loads including earth load.
regards
Sangeeta Wij
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Patwari.Rao
May 26, 2008, 6:38:48 AM5/26/08
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ashutosh.jain wrote:
| Quote: |
| Dear All, Is it possible to design a boundary wall in RR masonary , which is 5mt high from ground level, where can I find the guidelines or design steps. I another case the same wall has to retail earth on one side upto top of wall. I tried to do some calculations, but found that Tensile stress in mortar comes very large as compared to permissible tensile stress in mortar( 0.05 N/mm2). I am not sure about the calculation. Regards, ASHUTOSH JAIN Senior Executive - Civil PTD HA SIEMENS LTD. Plot 6A, Sector 18, Maruti Industrial Area, GURGAON. Ph: 0124 - 2846115. Important notice:This e-mail and any attachment thereto contains corporate proprietary information. If you have received it by mistake, please notify us immediately by reply e-mail and delete this e-mail and its attachments from your system. Thank You. |
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ajeetkokil
May 27, 2008, 3:37:22 AM5/27/08
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Hi,
In my opinion, RR walls being non-ductile (since does not consist of any ductile material) should not be designed like RCC walls.
So, while designing RR walls, we need not check its bending, because it cannot withstand any.
RR walls need to be checked for slinding and overturning with appropriate FOS.
However, it also needs to be checked for shear (caused by the back-fill, if any) against the shear strength of the mortar.
Other views are welcome.
Hope this helps
On Mon, 26 May 2008 ashutosh.jain wrote :
In my opinion, RR walls being non-ductile (since does not consist of any ductile material) should not be designed like RCC walls.
So, while designing RR walls, we need not check its bending, because it cannot withstand any.
RR walls need to be checked for slinding and overturning with appropriate FOS.
However, it also needs to be checked for shear (caused by the back-fill, if any) against the shear strength of the mortar.
Other views are welcome.
Hope this helps
On Mon, 26 May 2008 ashutosh.jain wrote :
| Quote: |
| Dear All, Is it possible to design a boundary wall in RR masonary , which is 5mt high from ground level, where can I find the guidelines or design steps. I another case the same wall has to retail earth on one side upto top of wall. I tried to do some calculations, but found that Tensile stress in mortar comes very large as compared to permissible tensile stress in mortar( 0.05 N/mm2). I am not sure about the calculation. Regards, ASHUTOSH JAIN Senior Executive - Civil PTD HA SIEMENS LTD. Plot 6A, Sector 18, Maruti Industrial Area, GURGAON. Ph: 0124 - 2846115. Important notice:This e-mail and any attachment thereto contains corporate proprietary information. If you have received it by mistake, please notify us immediately by reply e-mail and delete this e-mail and its attachments from your system. Thank You. |
Engineer,
Strl. and Arch. Deptt.
Engineers India Limited,
New Delhi
call me at 99112 02590
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battula_venu
May 27, 2008, 4:31:59 AM5/27/08
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Dear ASHUTOSH JAIN
It is possible to design boundary wall of height 5m in RR masonry. Refer SP 64 2001. Example 17.
Regards
Venu
On Tue, 27 May 2008 ajeetkokil wrote :
It is possible to design boundary wall of height 5m in RR masonry. Refer SP 64 2001. Example 17.
Regards
Venu
On Tue, 27 May 2008 ajeetkokil wrote :
| Quote: |
| Hi, In my opinion, RR walls being non-ductile (since does not consist of any ductile material) should not be designed like RCC walls. So, while designing RR walls, we need not check its bending, because it cannot withstand any. RR walls need to be checked for slinding and overturning with appropriate FOS. However, it also needs to be checked for shear (caused by the back-fill, if any) against the shear strength of the mortar. Other views are welcome. Hope this helps On Mon, 26 May 2008 ashutosh.jain wrote : |
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| Ajit Shankar Kokil Engineer, Strl. and Arch. Deptt. Engineers India Limited, New Delhi call me at 99112 02590 |
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