Home -> Forums -> Construction -> Pillar Work -> Clarification on Reinforcement

Clarification on Reinforcement

Tue Mar 22, 2016Total posts : 10
Praveen
Praveen
Join date: Nov 2013
Topic: Clarification on Reinforcement

I am planning to build a duplex house on a 30*40 site with 12 columns.I just wanted to confirm is the below reinforcement sufficient for a G+1 duplex house.

The house is block construction using 6 and 4 inch cement blocks.

Pillars - 8 No 16 mm dia rods with 8 mm ties @ 6 in c/c with size of pillar 6 * 15 Inch
Plinth Beam  - 4 No 16 mm dia rods + 4 No 12 mm dia rods (total 8 rods)  with 8 mm ties @ 6 in c/c with size of plinth beam 6 * 15 Inch
Lintel Beam -  4 No 12 mm dia rods with 8 mm ties @ 6 in c/c with size of lintel beam 6 * 6 Inch
Roof Beam - 8 No 16 mm dia rods with 8 mm ties @ 6 in c/c with size of beam 6 * 15 Inch

Thx in advance
Ausraja

Wed Mar 23, 2016Post  #1
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Dear Parvin
       The size and numbers of MS Steel bars are calculated with the structural drawing according to loading condition, safe bearing capacity of soil and effect of earth quack etc. However in general observation the given reinforcement seems to be right.
 
Fri Mar 25, 2016Post  #2
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Dear Parvin
           No need of stone masonry.
 
Tue Apr 12, 2016Post  #3
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Dear Parveen
                The position of column sees to be correct.
 
Tue Apr 12, 2016Post  #4
Praveen
Praveen

Join date: Nov 2013
Sir , Thx once again.
 
Wed Aug 17, 2016Post  #5
Praveen
Praveen

Join date: Nov 2013

Dear Sir , Needed a clarification.

I have attached the GF plan for reference and have extended the same columns for first floor plan and now want to go for partial second floor.

All brick work and RCC roofing for GF and FF are completed and now starting work for a partial second floor. For the first two floors i have used 12 columns all with 8 numbers of 16mm dia rods for both ground and first floors. The distance between any of those 12 columns is not more than 12 to 13 feet.

The issue that i am facing is for the second floor i want to extend only 8 columns of the 9 available columns in the rear for making a large family living room because one of those column is coming in the centre of the living room. I just want to know if this is structurally possible by putting a heavy beam in the centre (marked in black line in attachment SF1)?

The three columns in the front I am not extending them for second floor and stopping it in first floor and just having a balcony with a 3 feet parapet wall and no roof on the second floor.

thx for the help in advance

regards
Praveen

Attachments: GF1.jpg Wed Aug 17, 2016, 
SF1.gif Wed Aug 17, 2016,&n
 
Wed Aug 17, 2016Post  #6
Praveen
Praveen

Join date: Nov 2013
Please note that column that i don't want is the one which is in the centre of the beam that I have proposed in attachment SF1.The 8 columns that I want to extend are the 3 columns immediately above and below along with one each on right and left. I am okay to put a beam of any depth and reinforcements to have this living.
 
Fri Aug 19, 2016Post  #7
Praveen
Praveen

Join date: Nov 2013

Sir , Since I haven't received any reply just wanted to confirm one point.

For a column span of 24 feet which has 8 rods of 16 mm dia would a beam of 12"*6" with 8 rods 16 mm dia be sufficient to hold a 5" roof and no floors on top ?

 
Sat Aug 20, 2016Post  #8
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Dear parveen
      The size and steel given by you for 24' span seems to be on lesser side.
 
Sun Aug 21, 2016Post  #9
Praveen
Praveen

Join date: Nov 2013

Thx sir for the response.

Would a beam of 12 " * 12 " with 10 rods of 16 mm dia be okay ? if not then I am dropping this idea.

 
Mon Aug 22, 2016Post  #10
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Dear Parveen
In my opinion the size of beam should be 12''x18''including slab i.e. 13'' below slab and steel be 20 mm 6nos with 4 no 16 mm.
 

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