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uhvaryani
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PostPosted: Mon May 17, 2021 6:30 am    Post subject: Some General View Reply with quote

Dear Er. Vikramjeet,Sir,I congratulate you for giving your experiences for the benefit of us all..
I am enjoying,reading thro' your postings which give us an idea of your
vast and varied experience in the field of buildings and bridges.It is wonderful
and I request you to continue doing it.
with best wishes and regards,
uhvaryani


                Virus-free. www.avg.com                 

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vikram.jeet
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Joined: 26 Jan 2003
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PostPosted: Mon May 17, 2021 6:31 am    Post subject: Reply with quote

Boundary Walls - Passive pressure relief from soil

This is generally NOT to be  taken due to following reasons:
(I) There is always a possibility of drain running just outside all along the boundary wall.
(ii) Boundary wall foundation is very shallow 1 to 1.2 m
, Sometimes even 0.75m. the outside earth is never protected .
(iii) possibility of any excavation , as outside land does not belong to boundary wall owner.

However if designer is satisfied regarding outside ground status / drainage drains not in vicinity ,passive relief with some FOS can be accounted in calculations.
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vikram.jeet
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PostPosted: Mon May 17, 2021 8:17 am    Post subject: Reply with quote

Respected Sri UH Varyani Sir

Thank you Sir , kindly address me without putting sir before my name . Sir I am your student , learnt a lot from your books which have in depth on basics as also practising acumen   in structural  engineering  / mechanics of structures  science.
I was only a school going student with TAKHTI & SLATE when you have touched heights in structures design field.

With due regards

vikramjeet
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vikram.jeet
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PostPosted: Mon May 17, 2021 2:47 pm    Post subject: Reply with quote

May ALMIGHTY Save HIS  Creation


COVID situation

2nd wave is proving to be deadly. Nobody to care patients despite entire medical staff in country doing best on duty due to large no's of cases daily.
Nobody to cremate/ bury. Bodies are thrown in rivers.


Mirza Galib , a renowned Indian poet in his poetry said :

Let me move to a place where nobody is around
Nobody understand my language, nobody speak to me

Let me have a house without walls &doors
Nobody  in  neighborhood, nobody in the vicinity

If get sick , nobody to nurse & care
If die, Nobody to mourn the death

The last lines are what is happening in reality in this pandemic, though  No body would  like to wish like Mirza.
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vikram.jeet
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PostPosted: Mon May 17, 2021 3:20 pm    Post subject: Reply with quote

Upliftment of foundations on Rock

Any foundation , be it for bridges, or retaining walls / protection walls having rocky strata at base, upliftment as discussed in earlier post is permissible. But it is recommended that reinforcements needs to be provided in form of anchors drilled and grouted into  base rock and embaded in base during concreting.
For bridges Anchor reinf. effect is not taken design , but for other works, like Hydropower , river training walls etc 50% of strength is accounted in design to account for any rusting with passage of time .
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vikram.jeet
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PostPosted: Tue May 18, 2021 3:59 am    Post subject: Reply with quote

Notes in drawings

All structural drawings provide Notes  giving ready information regarding  materials to be used, their grades, and other important instructions on workmanship and some cautions  for safe construction to translate design into reality . It is a part of QUALITY assurance concern from designers.

Boxing the further important or Bold lettering , shading important aspects are done to bring attention of site works men.

Designer sitting in design office speaks through Notes.
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vikram.jeet
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PostPosted: Tue May 18, 2021 4:57 am    Post subject: Reply with quote

Notes in Foundation Drawings

1. Str. Drgs. basis - Reference of Arch. Drawings to be given
2. Number of storeys provision must be given
3.Reference of Net SBC taken in design to be given , regarding soil report & geotechnical consultant .
4 Instruction regarding structure to be founded on firm strata , if firm strata not met at foundation depth shown in drg, guidelines regarding any  loose pockets at founding level.
RCC work.
If Foundation strap beams provided for Edge columns , it must be mentioned in note here.
5 Concrete mix grade as per IS Code No.
6 Steel reinforcement grade  with Conforming IS code No.
7.Clear cover to main bars for footings, columns,plinth beams/ Grade beams, Floor beams , Slabs and Lintels and sunshades
8. LAP Length based on conc mix and reinforcement grade
9. Note regarding staggering of Laps
Brickwork
10. Quality of bricks and their crushing strength to be given
11.Cement mortars to be used for 230 brickwork AND 115th Brickwork to be given
For load bearing structures on brickwalls , brickwork CM needs to be given for footings , 345th wall upto PL/GL, 230 th B/Wall CM in various storeys to be given separately.

12 Note mentioning Plinth beams, Lintel Beams to be provided with their reinforcement passing thru RCC columns.
13 Note on CURING to be given
14 Note that work shall be executed ad per Relevant BIS Codes and approved Specification s to be given.
15 Note regarding supervision by experienced civil site engineer to be given , specially in works of non technical clients
16 Reference drawings of various disciplines to be given
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vikram.jeet
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PostPosted: Tue May 18, 2021 5:03 am    Post subject: Reply with quote

Foundation drg notes

In previous post, the Foundation strap beam note to be given below Note No 4 ( and note under rcc work typed by slip ).

Inconvenience regretted
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vikram.jeet
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PostPosted: Tue May 18, 2021 6:02 am    Post subject: Reply with quote

Notes in dr
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vikram.jeet
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PostPosted: Tue May 18, 2021 6:22 am    Post subject: Reply with quote

Notes in drawings

One note needs to be put in all drawings whether these are Foundation or superstructure ,floor drgs or any structural drawing.

The works shall be executed as per relevant BIS Codes and Approved/CPWD / PWD ,/  Specification.

For pvt client s APPROVED specification s.
For Govt works it is CPWD / or PWD Specification s

A designer may not able to give list of all BIS Codes. This list is covered in Specifications. Hence relevant BIS Codes wording being used.
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