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construction of 1st floor

Mon May 06, 2013Total posts : 16
SCK
SCK
Join date: Apr 2013
Topic: construction of 1st floor

I am building Mumty for keeping 2 water tanks of 500 l

capacity on 2nd floor height, as first floor construction is in progress (making steel bar Jaal for first floor)

With left over 8 mm Tata tiscon bars, I want to make Jaal of 6x6 for Mumty (10`x9`), height of Mumty 8.5`.

Is it okay, strength wise to bear load of water tanks etc

 

Mon May 06, 2013Post  #1
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Dear SCK
                   For mumty roof and load of water tank, use 12mm tor steel bar @ 6'' c/c.
 
Tue May 07, 2013Post  #2
SCK
SCK

Join date: Apr 2013
Post subject: construction of 1st floor

Dear Sir,

Thanks. I have done shuttering work for 1st floor, but I find gaps between steel plates and brick walls and between themselves. Mason is doing Gawri with loose sand and cement mix (10 : 1) on roof top. This may fill the gap on roof top but gap between brick walls and shuttering material (plate or wood) remains as such. I intend to use ready mix (M 25) supplied by RM manufacturers, to be poured by Pump. I am told RM supplied is thin slurry, my worry is that RM will flow down on walls or from roof top, wherever gaps are prominent. Please inform, whether Gawri can stop the RM from flowing down and what sort of packing can be done to fill gaps between walls and shuttering material.

How much RM (I intend 14 cu m) should be ordered to the firm for 5 inch thickness of RCC slab for area of 950 sq ft plus Latak beam of 1 ft, with 200 ft length. They want 100 % advance. Is it industry practice to take 100 % advance before supplying the RM

regards,

SCK

 
Tue May 07, 2013Post  #3
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Dear Sck
    Plug the hole either by Gawri or pack them with thin planks from mango packing PAITTI.  !5 CUM MIX is sufficient for concreting slab and beam.
 
Tue May 07, 2013Post  #4
SCK
SCK

Join date: Apr 2013

Along with Gawri for plugging gap between brick wall and plates/wooden phate`s, I am planning to put single layer of empty cement bag which is of PP and may hold RM from flowing down. Or I am planning to put iron mesh (machar jalli) below the gawri material (mud or sand mix) which may hold the RM at the time of pouring it. The iron mesh is lying as waste with me during dismantling of plastic shade shaft on 1st floor.

I am mulling over such issues and putting on hold LOHAR`s work for a while.

 
Tue May 07, 2013Post  #5
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Dear Sck
      Do not stop the work of binding the MS steel bars. When bar binding complete than place the wooden '' phait of mango wood pati'' of required width of  hollow portion in pieces and where required use plastic bags to plug the holes. The Ms bars place weight on them and they will remain in tact.
 
Wed May 08, 2013Post  #6
SCK
SCK

Join date: Apr 2013

Dear Sir,

Thanks, gawri work is to be done on rooftop also, but today, I expect the gawri to be completed and Lohars work will follow suit.

Kindly let me know, how much quantity of M 25 RM concrete to be ordered for following :

1 DR -                    20 `x 13 ` =  260 sqft 

1lobby -                20 `x 8` =   160 sqft

1 BR -                     18` x 13` =    234 sqft

1 BR-                      10` x 13`=     130 sqft

1 Kitchen             7` x 5`   =        35 sqft

Balcony (front)    20` x 6` =         120 sqft

Chajja  (back)       11x    6=                  66

                                                         1005 sqft

Plus latak beams of length wise – (48`+52`)+  breadthwise - (30` +30`+20`). All above 5 latak beams are  of 8 `` width with depth of 17 `` (12`` latak + 5`` RCC slab of roof).

regards,

 

SCK

 
Wed May 08, 2013Post  #7
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Dear Sck
        15 cum cement concrete mix is required for laying beam and slab.
 
Wed May 08, 2013Post  #8
SCK
SCK

Join date: Apr 2013

A small error occurred in stating above, length of latak beams is 200 ft (48+ 52+30+30+20+20) instead of 180. Meanwhile Gawri work is over. Jaal (12 mm as main beam and 10mm in sec beam) work is being done by Blacksmith. I am suggesting him to make crank in DR(20x13) and in 1 BR (18x13) on L/4 basis.

Any problem, if RM concrete is poured without vibrator, I am not able to locate a vendor who gives vibrator on rent.

SCK

 
Thu May 09, 2013Post  #9
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Dear Sck
       Vibrator is necessary but if due to some reason you are not able to get vibrator than compact the laid concrete mix by '' Roding'' the mix with any iron rod or any wooden 1'' to 2'' dia rod in beam and compact the slab by wooden ''PATI''. tHE QUANTITY OF MIX is from 15 cum to 15.5 cum. Crank is necessary.
 
Thu May 09, 2013Post  #10
SCK
SCK

Join date: Apr 2013

Thanks for this valuable advise. I shall try to do compacting with steel rods. It means keeping  3-4 beldar during pouring of RM mix. I am told that with pump, RM mix comes with great force and so coping manually with rods will be difficult with speed of pouring. They say that one load of 6 cu m with pump will be emptied in 30 minutes. 

 Gawri is over with sand mix, mud, some where iron mesh -machhar jali,  plastic bags, card boards etc. Black smith work is on along with cranks where ever required.

Keeping in view that Mumty (12` x 9` x 5``) is also to be covered, I am planning to order 16 cu m with flexibility of increasing / decreasing order by 10 % in 3rd load of 6 cu m.

regards,

 
Fri May 10, 2013Post  #11
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Dear sck
        It's OK, if fill any problem about technical know how than visit website gharexpert.com where all about construction.
 
Fri May 10, 2013Post  #12
SCK
SCK

Join date: Apr 2013
THANKX
 
Fri Jun 07, 2013Post  #13
SCK
SCK

Join date: Apr 2013
Post subject: works over roofing of RCC slab

After laying of RCC slab, what can be done over the roof

What type of material should be used for doing water proofing over roofing of RCC slab.

or u feel that nothing needs to be done and roofing of new RCC slab can be left as such, till any problem comes.

What sort of flooring can be done over the roof

SCK

 
Tue Jun 11, 2013Post  #14
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Dear Sck
       Treat your roof positively other wise leaking problem would start  and moisture will pen iterate in concrete and steel will be rusted  after some time which will weaken the structure.
After cleaning the roof, apply bitumen coat or spread polythene sheet on the roof than lay 1'' mud mortar on polythene sheet. than lay earth for giving proper slope for drainage of rain water. After that lay brick tile or clay tile on the rammed earth and grouted with cement mortar 1;3 and cement pointed the tile on top.
 
Sat Jul 04, 2020Post  #15
webworld
webworld

Join date: Jul 2020
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