Structural Engineers Forum of India

SEFI General Discussion :: RE: Design a Large Building WITHOUT expansion Joint

skhalid — Fri, 22 May 2026 11:52:38 GMT

Author: skhalid
Posted: Fri May 22, 2026 11:52 am (GMT 0)

Thanks Vikramjeet Ji,

Request all other Sefians to please their experience also.

Regards

SEFI General Discussion :: PEB Main Frame STAAD Input Generator (OPEN SOURCE)

someshwar ganti — Wed, 20 May 2026 05:17:30 GMT

Author: someshwar ganti
Subject: PEB Main Frame STAAD Input Generator (OPEN SOURCE)
Posted: Wed May 20, 2026 5:17 am (GMT 0)

i would like to inform all those intrested in PEB desiging,
i have created a Simple STAAD inut file generator of a PEB Main Frame

generally , the pain points in creating a STAAD input file are the
Load Calculations (Wind, Crane) and its Load Combinations

This program TRIES to reduce that Pain Points.

Using this as a BASE the engineer can easily modify the member split, modify the sizes etc

request Engineers to check and let me know any corrections.

Note :- THIS IS A FREE WARE and will REMAIN SO, i can share the source code also in this Forum

Special Thanks to Ramnath Shenoy Sir for willing to hear my questions with great Patience and Taking me BACK TO SCHOOL on my Basics.

the program is available on
https://staad.zaxises.com/

(Click PEB FRAME GENERATOR button )

SEFI General Discussion :: Webinar 151� Complex Structures & Innovative Solutions : Base Isolators for Earthquake Resistant Design

admin — Tue, 19 May 2026 10:24:08 GMT

Author: admin
Subject: Webinar 151� Complex Structures & Innovative Solutions : Base Isolators for Earthquake Resistant Design
Posted: Tue May 19, 2026 10:24 am (GMT 0)

Announcement: Webinar 151 - Base Isolators for Earthquake Resistant Design
    Main Topic: Complex Structures & Innovative Solutions
    Organized By: EFC (Epicons Friends of Concrete) & ISSE
    Sponsored By: SCON Infra Prestress LLP

Webinar Details

Date: Saturday, 6th June 2026
Time: 10:00 AM - 1:00 PM IST
Registration Link: https://sefindia.org/webinar151/
Download Flyer: Click here to download PDF

Speakers

Dr. Anoop S. Mokha, Ph.D., S.E. - Vice-President, Earthquake Protection Systems, Inc., USA
Prof. Dr. Vasant Matsagar - HOD, Civil & Environmental Engineering, IIT Delhi
Prof. Manohar Gadgil - Senior Advisor & Structural Engineering Expert
Er. Anand Kulkarni - Director, Epicons Consultants Pvt. Ltd.

Speaker Bios

Dr. Anoop S. Mokha: With a 40-year career spanning basic research to global implementation, Dr. Mokha is a leading authority on Friction Pendulum bearings. He has successfully implemented "Continued-Functionality" seismic designs in over 38 countries.
Prof. Dr. Vasant Matsagar: Holds a Doctorate from IIT Bombay focused on the Earthquake Behaviour of Base-Isolated Buildings. He is the Editor-in-Chief of the Indian Concrete Journal and has published over 173 international journal papers.
Prof. Manohar Gadgil: An alumnus of IIT Powai (M.Tech, 1975), Prof. Gadgil has guided over 100 PG students, developed specialized structural software, and completed structural designs for over 15 high-rise buildings and complex machine foundations.
Er. Anand Kulkarni: Specializing in tall building design with 38 years of experience, he has contributed to the engineering of over 80 high-rise structures (100m to 250m) and is renowned for developing highly efficient structural systems.

Fee

Early Bird Registration (08.05.2026 to 25.05.2026):
- Professionals: ₹ 1000
- Faculties & ISSE Members: ₹ 500
- Students: ₹ 200
Regular Registration Fees:
- Professionals: ₹ 1200
- Faculties & ISSE Members: ₹ 700
- Students: ₹ 400

Webinar Coordinators and Contact
(Tap to send WhatsApp text for assistance or query)

Dhanashree Rane: +91-9152031321
Rashmi Jarode: +91-8657067023
Email: secretary@epicons.com

Webinar Conveners

Er. Hemant Vadalkar (ISSE)
Er. Jayant Kulkarni (EFC)
Er. Arvind Parulekar (EFC)

This is a sponsored Media Announcement. (Advt.) Sponsor assumes responsibility for the content above. To communicate further in this regard, use the contact info provided in the message above. PDF

SEFI General Discussion :: RE: Design a Large Building WITHOUT expansion Joint

vikram.jeet — Tue, 19 May 2026 03:13:29 GMT

Author: vikram.jeet
Posted: Tue May 19, 2026 3:13 am (GMT 0)

Generally, we provide expansion joints in buildings  , in Rcc Buildings this limit is 45 m,,

In case Expansion joints are avoided, then Thermal loading needs to be taken as rightly thought of by you.

I think, all exposed surfaces, Roof slab and exterior walls are subject to exposures of thermal effects and from these members, these are transferred to main frame beams and columns,,

Temperature effects, I think, can be taken based on thermal movement in form of displacement.

From geometric center of roof, the movement will be on either side, and depending on location of columns, the displacement be applied, I feel.  This to be applied at roof top level in framing columns.

From walls similarly it can be applied in udL form on all exterior columns.

DELTA L =  ALPHA * L*DELTA T ,

L

SEFI General Discussion :: RE: Design a Large Building WITHOUT expansion Joint

skhalid — Sun, 17 May 2026 17:32:40 GMT

Author: skhalid
Posted: Sun May 17, 2026 5:32 pm (GMT 0)

Respected Sefians,

Suppose, If we are analysing a 90m x 150m size building with G+5 stores in Staad software. We are not providing any expansion joint. We are applying temperature load on the building model.

Question 1 - On which elements shall we apply the loads ?. On all columns, on all beams & on all slabs ??

Question 2 - If only on slab, then I think it will be provided on the top terrace slab.

Question 3 - Shall we apply on all the columns, or on exterior columns only ??

Question 4 - On Beams, we need not to provide any temperature load

Please give your valuable suggestions & comments.

Regards
S.M. Khalid

SEFI General Discussion :: Guidance regarding Prefabricated Vertical Drain Testing Criteria

Ajit Gandhi — Sat, 16 May 2026 11:20:54 GMT

Author: Ajit Gandhi
Subject: Guidance regarding Prefabricated Vertical Drain Testing Criteria
Posted: Sat May 16, 2026 11:20 am (GMT 0)

I would request Members to kindly share actual experience on Prefabricated Vertical Drain application towards Ground Improvement Method. Other than IS 15284 Part 2 : 2004, Is there any Standard mentioing Testing Procedure to ascertain Improved Safe Bearing Capacity by using PVD ?.

SEFI General Discussion :: Spread sheet for Civil Structure Desing

ANURANJANKUMAR — Thu, 14 May 2026 10:55:10 GMT

Author: ANURANJANKUMAR
Subject: Spread sheet for Civil Structure Desing
Posted: Thu May 14, 2026 10:55 am (GMT 0)

Hello
Please, anyone, send me the design spreadsheet for the following structure

1) Design of RCC drain/cable trench
2) Design of RCC Manhole
3) Design of Floor Slab on Grade/on soil (wheel load + point load)
4) Design of Dyke wall with floor
5) Design of pump foundation

My Email ID- kumaranuranjanto@gmail.com

SEFI General Discussion :: RE: corrosion in column reinfo

ANURANJANKUMAR — Thu, 14 May 2026 04:45:44 GMT

Author: ANURANJANKUMAR
Subject: Re: corrosion in column reinfo
Posted: Thu May 14, 2026 4:45 am (GMT 0)

Hello
Please, anyone, send me the design spreadsheet for the following structure

1) Design of RCC drain/cable trench
2) Design of RCC Manhole
3) Design of Floor Slab on Grade/on soil (wheel load + point load)
4) Design of Dyke wall with floor
5) Design of pump foundation

My Email ID- kumaranuranjanto@gmail.com

Dr. N. Subramanian wrote:

Dear Er Sendhil,

First check, if you have not designed in the first instant, whether the reinforcement and size provided are adequate.

Note that a slight rusting is allowed and may be useful for developing bond. Coming to your questions I am replying along with those questions.
1. Any anti corrosive treatment required , before execution? Yes. Provided there is no loss in cross-section- several products are available in the market. You may approach Fosroc chemicals (Galvafroid Paint) or other similar companies.
2. i have learnt corrosion in steel which is exposed, will be less when compared to steel inside the concrete...Is it true? NO. Corrosion is more in exposed surface than inside concrete, as concrete provides a protective layer. In fact applying a coat of cement slurry is a type of corrosion treatment of exposed steel.

3. If that is the case what is the solution to go for further floors?

As suggested by Er Jayakumar, clean the reinforcement first, find out whether considerable section is lost(if yes, you need to lap additional reinforcement as suggested by Er Jayakumar).

Best wishes
NS

sendhil wrote:

Dear all,

A building was proposed to G+3, but only GF was constructed and decided to built rest of floors later , but column reinforcement were put exposed to environment , without any coating for 2 years. Now the client decided to construct the floors, but the column reinforcement looks rusted. my question is

1. Any anti corrosive treatment required , before execution?
2. i have learnt corrosion in steel which is exposed, will be less when compared to steel inside the concrete...Is it true?
3. If that is the case what is the solution to go for further floors?

plz give your valuable suggestion

SEFI General Discussion :: RE: Support Reactions Summary of STAAD output file

ANURANJANKUMAR — Wed, 13 May 2026 09:59:47 GMT

Author: ANURANJANKUMAR
Posted: Wed May 13, 2026 9:59 am (GMT 0)

Hello
Please, anyone, send me the design spreadsheet for the following structure

1) Design of RCC drain/cable trench
2) Design of RCC Manhole
3) Design of Floor Slab on Grade/on soil (wheel load + point load)
4) Design of Dyke wall with floor
5) Design of pump foundation

My Email ID- kumaranuranjanto@gmail.com

ANURANJANKUMAR wrote:

Thank you for your suggestion.

I have considered the Fx & fz, The revised drawing has approved

vikram.jeet wrote:

DEAR ER,,

The values of Mx and My, Fx Fz you got, are at base plate level of steel Rack columns,,

For foundation, which is located deeper at Founding level ,, please add ADDITIONAL MOMENTS TAKING ( HORIZONTAL FORCE X Df)

Df = Depth of Foundation below base plate level.

HENCE GROSS MOMENTS ON FOOTING WILL INCREASE.

PROOF READER OF CLIENT IS VERY RIGHT

SEFI General Discussion :: RE: Support Reactions Summary of STAAD output file

ANURANJANKUMAR — Wed, 13 May 2026 09:53:17 GMT

Author: ANURANJANKUMAR
Posted: Wed May 13, 2026 9:53 am (GMT 0)

Thank you for your suggestion.

I have considered the Fx & fz, The revised drawing has approved

vikram.jeet wrote:

SEFI General Discussion :: RE: Support Reactions Summary of STAAD output file

vikram.jeet — Sun, 10 May 2026 06:29:06 GMT

Author: vikram.jeet
Posted: Sun May 10, 2026 6:29 am (GMT 0)

DEAR ER,,

The values of Mx and My, Fx Fz you got, are at base plate level of steel Rack columns,,

For foundation, which is located deeper at Founding level ,, please add ADDITIONAL MOMENTS TAKING ( HORIZONTAL FORCE X Df)

Df = Depth of Foundation below base plate level.

HENCE GROSS MOMENTS ON FOOTING WILL INCREASE.

PROOF READER OF CLIENT IS VERY RIGHT

SEFI General Discussion :: RE: Support Reactions Summary of STAAD output file

ANURANJANKUMAR — Sat, 09 May 2026 06:27:05 GMT

Author: ANURANJANKUMAR
Posted: Sat May 09, 2026 6:27 am (GMT 0)

Dear sir,

I have designed the pipe rack foundation considering the Fy, Mx & Mz (the pipe rack superstructure is a steel structure) & submitted it to the client for approval, but the client wants to consider the Fx & Fz reactions for foundation design.

Support is fixed for stell structue.

I want technical advice. How can i do & what will be reply

someshwar ganti wrote:

I fail to understand the relavance of your question to this topic subject.

Why Fx , Fz are considered are at the designer's intution how can anyone tell why it has not been considred generally ?

having said that normally for a steel building , the base is pinned connection, Fx will be there and that has to be considred for desiging the footing as that will add to the moment at the base of the footing.

ANURANJANKUMAR wrote:

Can you explain to me when we are designing footing they reaction on Max Fy, mx & mz for pipe rack, warhouse stell building? Why not consider fx & fz.

If need to consider then could you please advise any code references

SEFI General Discussion :: RE: Support Reactions Summary of STAAD output file

someshwar ganti — Sat, 09 May 2026 04:42:21 GMT

Author: someshwar ganti
Posted: Sat May 09, 2026 4:42 am (GMT 0)

I fail to understand the relavance of your question to this topic subject.

Why Fx , Fz are considered are at the designer's intution how can anyone tell why it has not been considred generally ?

having said that normally for a steel building , the base is pinned connection, Fx will be there and that has to be considred for desiging the footing as that will add to the moment at the base of the footing.

ANURANJANKUMAR wrote:

SEFI General Discussion :: RE: FOUNDATION DESIGN

ANURANJANKUMAR — Fri, 08 May 2026 19:12:43 GMT

Author: ANURANJANKUMAR
Posted: Fri May 08, 2026 7:12 pm (GMT 0)

Can you explain to me when we are designing footing they reaction on Max Fy, mx & mz for pipe rack, warhouse stell building? Why not consider fx & fz.

Can any one advise

SEFI General Discussion :: RE: Support Reactions Summary of STAAD output file

ANURANJANKUMAR — Fri, 08 May 2026 18:53:37 GMT

Author: ANURANJANKUMAR
Posted: Fri May 08, 2026 6:53 pm (GMT 0)

Can you explain to me when we are designing footing they reaction on Max Fy, mx & mz for pipe rack, warhouse stell building? Why not consider fx & fz.

If need to consider then could you please advise any code references