Categories
Civil Engineering Earthquake Engineering Structural Engneering

Session 34 : Critical Review of IS 1893 (Part 1) : 2016 – Dr. Ashok K. Jain

Introduction

Centuries ago, a large number of astonishing structures such as Kutub Minar, Taj Mahal and so many incredible palaces and temples were built in stone masonry in various parts of the country. Some of these temples have very tall shikhars with amazing carvings. They have so many delicate columns and non-structural elements. They are standing even today without any damage due to past earthquakes. However, is it possible to build similar stone masonry structures today? NO. IS 1893 (Part 1) will not let you. It has banned such structures explicitly in seismic zone III, IV and V.

The question arises who is wrong? Our ancestors or the modern day IS 1893 (Part 1) code? (Extract from paper of Dr. Ashok K. Jain)

The original paper was presented by Dr. Ashok K. Jain in the meeting of IAStructE on 11th May, 2017. Since then, a number of practicing engineers have made requests to discuss the various issues in more detail. In 2020, BIS has issued amendment no. 2 which is quite exhaustive. Recently, he has modified the document based on request of the practicing engineers.

In the upcoming live technical discussion, Dr. Ashok K. Jain will share his critical review about IS 1893 (Part 1) : 2016.

About Speaker

Dr. Ashok K. Jain is currently a structural consultant having over 40 years of experience. Formerly, a Professor of Civil Engineering at the Indian Institute of Technology Roorkee, Roorkee. Dr. Jain received his Ph.D. in Civil Engineering from the University of Michigan, Ann Arbor, MI in 1978. He received gold and silver medals in B.E. (Civil Engineering) and M.E. (Structural Engineering) at the University of Roorkee, Roorkee. He is well known for imparting latest knowledge on each subject/topic through latest analytic tools such as MATLAB, MS Excel, SAP2000, and ETABS.

Dr. Jain has published over 50 refereed journal papers and over 60 conference papers on various topics. He has authored five text books:

  • Dynamics of Structures with MATLAB Applications, Published by Pearson (2016)
  • Reinforced Concrete – Limit State Design now in its 7th edition (2012) – This book has the distinction of being the first book on the subject published in 1983 in India and enjoys excellent reputation till date.
  • Advanced Structural Engineering with Finite Element Method, 3rd edition (2015)
  • Strength of Materials and Structural Analysis, 2nd edition (2008)
  • Fortran programming, second edition (1990) – now discontinued

He has delivered keynote addresses in many conferences and conducted short specialist courses on Reinforced Concrete, water retaining structures, ductile detailing of structures, dynamics of structures and earthquake resistant design.

Schedule

DATE : 21-JAN-22

TIME : 7:00 PM IST

How to register for the event?

Registration to the event is FREE. You may register by clicking on following button. In the registration form, you will be able to share the specific doubts/queries related to IS 1893 (Part 1) : 2016 which you would like to get it addressed during the session.

After registration, you will receive a link for participation in the session.

STEEL-STR-001 : An online course related to design of steel structures will commence from 25-JAN-22. For more details, please visit the link : https://sqveconsultants.com/steel-str-001

Categories
Civil Engineering Design life of structure Design of RCC structures Earthquake Engineering Structural Engneering

SESSION 27 – DESIGN LIFE OF RCC STRUCTURES

INTRODUCTION

Structural Engineers, Civil Engineers, Owners and other construction professionals are concerned about the life of a structure. All the stakeholders desire a long life for the structure. Also, there is a lot of curiosity amongst the professionals in the wake of monuments being designed for up to 1000 years.

It is difficult and challenging to predict life of a concrete structure as there are multiple factors affecting the same like structural system, design parameters, concrete mix design, type of reinforcement, quality assurance during execution, protection against corrosion, earthquake resistant design, regular maintenance of the structures – to name a few.

In view of the above, the forthcoming online technical deliberation is on design life of RCC structures. The discussion therefore would be focused on the following important areas:

  • Quality control and assurance in lab and at site.
  • Construction Chemicals in concrete mix , grouting, coatings for reinforcement
  • Choices of Reinforcement Steel from durability criterion including coating, surface treatment, alloys, corrosion resistance
  • Deterioration of concrete considering cement chemistry & concrete and concreting practices
  • Predictions of earthquake forces and reform in material science considering ductility

SCHEDULE

DATE :12-NOV-21

TIME : 7:00 PM IST

EXPERT TEAM

  • Mr. Umesh B. Rao, Consulting Engineer
  • Dr. Manmohan R. Kalgal, Advisor- Ultratech
  • Dr. Jayanto Saha, INSDAG
  • Mr. Samir Surlekar, SS Buidchem
  • Mr. Anil Pillai, RAMCO cement
  • Dr. Pradeepkumar Ramcharala, IIIT – Hyderabad

HOW TO REGISTER FOR THE EVENT?

Registration is FREE. Please click on the below button wherein you may share the specific doubts/queries/discussion points which may be discussed during the session. It would help us to structure the discussion.

Upcoming ONLINE Course : As per request from engineers, we have launched an online course related to ETABS software which will commence from 23-NOV-21. Click here for more details.

Categories
Design of RCC structures Earthquake Engineering Structural Engneering

Session 24 : Stiffness modifiers as per IS codes

The concept of stiffness modifiers was introduced for the first time in IS 1893 (Part 1) : 2016. The clause no. 6.4.3.1 of the code defines requirements for structural analysis. It is mentioned in the clause that for structural analysis, we should consider reduced moment of inertial for RCC structures. For columns, 70 percent of Igross should be considered and for beams, 35 percent of Igross to be considered. Thereafter, stiffness modifiers were defined in IS 16700 as well. There are certain practical difficulties as it is a relatively new concept for the Indian Standards.

We arranged couple of live technical discussions earlier on the subject. However, still we are receiving queries from the engineers as well as there are few requests for arranging the live discussion on the stiffness modifiers.

In view of the above, next live technical discussion is planned on 25-SEP-21 (Saturday) at 7:00 PM.

Speaker : Bhavin Shah, Founder & CEO – SQVe Consultants

How to register for the event?

Registration is FREE. Please click on the below button “Register Now” and fill up the required details. You may share the specific questions in advance which may be discussed during the session. For any queries/doubts, you may contact us at : LIVE@sqveconsultants.com

Recorded video : Session 24 – Stiffness Modifiers as per IS code

An interesting online course related to design of steel structures,  STEEL-STR-001 (Decode IS 800:2007 along with software) has started from 25-JAN-22. You may still join the course. Click here for registration.

Feedback of few participants for previous online courses:

Praveen Vasishth

STEEL-STR-001 is very useful course for updating to new code for steel design of buildings.

Ajay Narayan Jadhav

The course WIND-STR-001 provided Excellent clarifications on IS875 clauses.

Er. Sachi Parekh

I appreciate the course structure designed by Er. Bhavin Shah , which includes the theory and implementation of coddle provisions to software and interpretation of results. By attending it, I am able to learn and explore the analogy of a software – Staad Pro. Thank you very much for sharing the knowledge and make my doubts crystal clear…

I must say that he is a true professional academician
Like a bridge between Institute and industry…

 

Praveen Upadhyay

Bhavin Shah is a fantastic trainer, very friendly and encouraging, it was a well-delivered and presented course (STAAD-STR-001) that was well received by the group. There was a great balance between theory and practice and the concepts were clearly and professionally explained.

Kunal Patil

At first I never expected the sessions which are going to be conducted would be so knowledgeable. Day by day listening to Abhay sir touching every aspect from the codal point of view, few from his own experience. The mixture of everything made this course WIND-STR-002 very valuable and useful. Before this course I was trying to learn from everywhere how does this wind dynamic forces are to be calculated but through SQVE consultants arranging this webinar and learning under experience fraternity was worthwhile.

Hiren Desai

The course WIND-STR-002 is very much informative as well as useful for practicing engineers considering the non availability of easy to detailed literatures and practical examples.

Shefali Thakkar

STEEL-STR-001 was the best interactive course ,wherein all practical facts and limitations those are related with prevailing standards, software and practices were discussed. Vision was provided to participate towards solving such prevailing limitations rather following the same collaboratively. Course content was described very effectively and constant encouragement on experiments of the course deliverables and raising doubts and solving the same. Effective time management by faculty to satisfy all participants’ queries along with effective delivery of course content. 24 hour interaction facility was made available for solving course related queries.

JAKEER HUSSAIN

WIND-STR-002 : Explanation regarding wind action and building response due to wind, and the way of clarifications to participants questions by Dr. Abhay Gupta sir was excellent. Looking forward to attend relevant upcoming webinars/courses.

Dhirender Singh Bisht

I am pursuing masters in structural engineering and steel was the topic that I found always challenging since my B.Tech times. Moreover this is also a missing topic for the syllabus of many universities in masters program. To understand its theory ,and execute it practically in software is really challenging and need a mentor for that. I’ve been following Bhavin sir from last few months and was it was my good decision to choose him as a guide. By the course STEEL-STR-001, now I can feel that I am in a position to explore boundaries of IS code, and also I’m enthusiastic to see how Euro code, AISC code and other countries code tackles the problem which sounds to be complicated in IS code.

Alok Rathore

After attending the course WIND-STR-001, I change my prospective towards structure and learn many concept.

Prashanth N

The course STEEL-STR-001 was well planned and the sessions were very interactive and informative.

Hemanth Ponnuri

STEEL-STR-001 course is very informative and very well explained about the hidden insights in the IS800 code.

Chokshi Hem

I heard somewhere that we shall never use STAAD for dynamic analysis. But that wrong interpretation of the software was cleared through the course : STAAD-STR-001.

Nitin Sharma

I would like to thanks and appreciate for this helpful course comprising of STAAD PRO Training and Design concepts for RCC and Steel. In this module I have learned in detail about essential concepts for designing industrial buildings and gained an understanding of different types of Analysis. I also acquired the knowledge of different types of Codes. Moreover, l was introduced with FEM, design of foundation, anchor bolts and connections. All the sessions were very interactive and engaging. The valuable knowledge that i have gained in these two months will certainly be propitious to start my career as a structural engineer.

Mainak Ghosal

The Course WIND-STR-002 was very effective. It changed my perspective on not only wind engineering but also seismic loading analysis. Dr.Gupta also referred some excellent books which would not have been possible otherwise. Last but not the least, Dr. Gupta was kind enough to give me the charges of highlighting the errata for the Explanatory Handbook on Wind Engineering.

RATHISH V R

I really enjoyed throughout the journey of the course STEEL-STR-001 wherein I improved by Fundamental Knowledge in the Design of Steel Structures. Bhavin Sir’s explanation on Lateral Torsional Buckling and other critical areas, really helped me to become sound in manual calculations. Keep continuing the good work!

Mohd Ameen Irfan

Bhavin Sir is very experienced and expert in his field, He made the topics in online course STAAD-STR-001 very clear from the scratch and also addressed every student’s queries and problems very nicely!!!

Anvitha Yadama

It has been an excellent course and given me an in-depth understanding on ETABS and STAAD.Pro software . I feel more confident in my understanding and it helped me complete my major project in my B. Tech course .Thank you for all the support and excellent teaching. During the training program all my queries were answered quickly.

Supriya Pal

I AM A PHD SCHOLAR AND WORKING IN THE FIELD OF WIND STRUCTURE INTERECTION. I GOT A LOT OF MY DOUBTS CLEARED THROUGH THIS COURSE : WIND-STR-002. THANKYOU VERY MUCH

Akash Solanki

STEEL-STR-001 was the best package for understanding the limit state design of steel structures using IS800:2007 along with its application in STAAD.Pro. Tremendous wealth of knowledge from Bhavin sir combined with queries by other participants really facilitated a great learning experience. Thank you for such an amazing course. I hope more such courses are on the way.

D. Nivetha

The Staad Pro Training sessions were extremely fruitful, informative and it gave deeper insights into the field of structural engineering. Bhavin sir had not only taught us the software of Staad Pro, but he had explained us several technical concepts based on his field experiences. It was an interactive session where sir had asked us questions and it helped us think a lot and come up with solutions. Overall, it’s been a great experience and this 25 day of training has taught me a lot and has inspired me to develop greater passion towards civil engineering.

Dr. Raksha Parolkar

Topics covered in WIND-STR-002 were new for me to understand, as it has never been covered in syllabus. But the way Dr. Abhay Gupta sir taught, explained the problems and shared his experiences, the subject got easy to understand. I feel proud of being his student.

Anal Shah

The course WIND-STR-002 was so interactive and Dr. Abhay Gupta was so kind enough to listen to all queries and answer them in very great detail. Also time spent by Dr. Gupta is highly appreciated. Great job Dr. Gupta in spreading the knowledge.

Sujata Gupta

It gives a good awareness about software as well as corresponding codal provisions. So one can get technical knowledge as well as how software using clauses giving in codes. Teacher is very patient, soft spoken and knowledgeable person. Topics selected in the course STEEL-STR-001 are very relevant, useful and to the point for design and analysis of steel structure.

Parth Gandha

The course STAAD-STR-001 was really amazing an knowledgeable. As I fresher I gained so much knowledge about all the little things I didn’t know that were so much important. Troubleshooting of the software was the most important topic as a single wrong interpretation of the warning can totally change the outcome. I heartily thanks Shri Bhavin bhai and SQVE consultants for introducing such wonderful courses so that we can perform good in practice.

Rajashree

The course WIND-STR-001 facilitated discussion and understanding of concepts  in more detailed simplified manner under the experienced and knowledgeable professionals. Thank you Dr Abhay sir and Bhavin sir.

Harikrishnan

Faculty engineering knowledge is excellent. These course STEEL-STR-001 is useful for fresher and experienced person.

Ashish Sawant

The course WIND-STR-001 is very informative. It clears basics of overall concept of wind flow. Thanks to Bhavin sir and Gupta sir for your guidance on wind loading.

Rajen Dharia

On attending to STEEL-STR-01 course with the multi discipline participates from across India is the best part of this course. As the questions raised and its solutions, are many a times very new for each other during the sessions which enhance our knowledge in different practical applications and approach towards it’s solution. I Recommend to join STEEL-STR-01 to all upcoming Structural Engineers.

Dr. Vinubhai Patel

The course WIND-STR-002 was really very much informative and useful. Enjoyed a lot.

Srinivasa Reddy

Dear Sir thank you so much for your Course ETABS-STR-001. We learn Lot from here. Happy to Join this Course we are waiting for next Upcoming Courses.

REVA VENU V M

I am a budding geotechnical engineering professional. For three years I have worked as faculty in NIT and recently joined as project fellow- geotechnical engineering in a research Institute. Now I am in the transition phase of my career ie, shifting from academics to industry. My desire to become a geotechnical engineering consultant inspired me to join this course. As I don’t have much industrial exposure, attending the course GEO-STR-001 helped me to gain a lot of practical knowledge related to geotechnical engineering. Especially the discussions related to soil investigation, interpretation of soil report and interactive sessions were really amazing. Queries of other participants and the discussions associated with it,were really informative, as it mainly focussed on current industrial practices. Thank you Vivek sir and Bhavin sir for giving this wonderful opportunity. Hoping for a better support in my future endeavours too. Also expecting further courses related to this, in the coming future.

M. K. Haridharan

In the course ETABS-STR-001, all the session are very interactive, it has a touch with theory, hands on training and practical aspects. The knowledge of the mentor is extraordinary in all aspects.

BHARATENDU PATEL

This course related to STAAD.Pro and case studies was beyond the conventional software training. It helped me conceptualise the idea behind the behaviour of any structure, understand the special requirements between steel and concrete structures. Real life case study and interactive sessions made the learning more impactful.

Akshay Thakur

REC-STR-001: The recorded sessions are more than anything for tackling practical difficulties…. and you bring some other professionals like dr. Jain and dr. Gupta is just like awesome experience for the student like me who are from tier-3 college who won’t get such a precious information… thanks to you also for the knowledge you impart… best luck to you and your team for this your initiative to resolve practical difficulties among aspiring structural engineers… 🙏🏻 once again thank you so much… because nobody in today’s era from structural engineering domain is wants to share the information, but you do… kudos!

Dipal Trivedi

The course GEO-STR-001 effectively addressed the gap between geotechnical and structural engineer. It not only covers important interface areas but also discusses consequences of poor interface. Subject experts have in depth knowledge and experience to address expectations of various participants ranging from fresh engineering graduate to highly experienced professionals. The course is interactive and experts are more than willing to address any queries of the participant. The course content is appropriately divided into multiple sessions over the weekend to allow flexibility to participants to participate and reflect during the week at their convenience. Overall, this course is highly recommended for structural and geotechnical engineers for gaining and enhancing the understanding of the very important interface between geotechnical and structural engineering work.

Ravichandra

STEEL-STR-001 is very wonderful course. I have learned many things through this course. During session Bhavin sir interaction with the participants is very great with clear explanations. We are expecting these type of courses in future also.

Haridharan M K

The online course EQ-STR-001 was very informative and it covered all the aspects of IS1893, IS16700, IS13920 and more important sharing the videos of the course which enabled to go through at any time.

Kamlesh Mehta

In the course WIND-STR-002, I was not able to attend few lectures due to internet connectivity problem. But I have gone through the video lectures provided by Mr. Bhavin shah and it is positive point that any time any where we can watch and update our knowledge.

Sharad Gupta

I am very grateful to Er. Dr. Abhay Gupta and Mr. Bhavin Shah for sharing your knowledge with us even though we have the same profession. Your course WIND-STR-002 helped me to clear many of the doubts I had sine the past 20 years.

Mr. AJAY NARAYAN JADHAV

JUST TO APPRECIATE THE WORKSHOP STAAD-STR-001, IT HAS BEEN VERY USEFUL FOR ME. I WOULD LIKE TO HIGHLIGHT THE DYNAMIC OF THE SESSIONS, VERY ACTIVE, INTERESTING, AND WELL ORGANISED AND GREAT TO SHARE EXPERIENCES. MANY THANKS TO THE SPEAKER AND ORGANISERS!!…..ONCE AGAIN THANK YOU FOR SHARING AN INSPIRING LEARNING EXPERIENCE 👍

ZEESHAN MUNSHI

After attending online course STAAD-STR-001, I m very happy to share that….now I understand the result which I get after analysis……and how to use or understand the STAAD editor. Thank u so much for that…!!

Tarnpreet Singh Gill

The course content for STEEL-STR-001 has been thoroughly devised to be effective in best manner. Sharing of Recorded Sessions was the best part as I myself missed few end sessions due to office pressure but I could complete these later on. Making a permanent whatsapp group for discussion was also a good idea.

Ajay Narayan Jadhav

WIND-STR-002 : Excellent sessions. Thanks a lot to team SQVe and the eminent speaker for giving a valuable knowledge.

Shreyas Barad

STEEL-STR-001 is much awaited course. Finally the industry expert teaching the right thing with right methodology. I had never seen such an excellent online course like this. The amount of knowledge and engagement was extremely good. Thank you so much for the wonderful course.

Tanuja Singh

STEEL-STR-001 : Excellent initiative to bring clarity of concepts to professionals.

Categories
Civil Engineering Earthquake Engineering Geotechnical Engineering Retrofitting

Session 20 : Approach towards retrofitting of the structures

LIVE TECHNICAL DISCUSSION SERIES

Brief about topic :

Retrofitting of structures is indeed a vast science. The whole process of retrofitting may not yield the intended purpose if the appropriate approach is not used. The entire process may be divided in two parts, firstly, preliminary evaluation and secondly, detailed evaluation. The preliminary evaluation may aim to access the root cause, requirement of retrofitting, retrofitting scheme, tentative budget, etc. Finally, in the detailed evaluation, the exact structural analysis, design, detailing for retrofitting, etc. may be emphasized.  In the upcoming live session, we will discuss this important area wherein Dr. Dilip Khatri will share his insight on the subject.

Brief About the Expert

Dilip Khatri, PhD, SE (Principal Structural & Civil Engr, Khatri Int. Inc.)

Dr. Khatri has thirty-five (35) years of civil engineering experience involving land development, subdivision, commercial, residential, multi-family, industrial, and educational facilities. Design, construction, and overall management of major infrastructure improvements comprising sewer, water, storm drain, flood control, and grading design.

He has been working with Insurance Carriers over the past ten years involving various areas of casework :

  1. Forensic Structural Engineering,
  2. Structural Design/Engineering Reconstruction
  3. Construction Cost Estimating and Project Management
  4. Geotechnical and Soils Issues
  5. Earthquake/Seismic Evaluation of Existing Buildings and PML Reports

How to register for the event?

Registration is free but it is mandatory. The live session will be conducted using ZOOM software. Kindly note that there are limited seats. Click below for registration:

For any queries/doubts, you may contact us at: contact@sqveconsultants.com

We have received huge response to the proposed live discussion and we have already exceeded the registration number beyond the limited seats. Hence, we will be also broadcasting the same parallelly live on YouTube.

https://youtu.be/otcozfj8QK0

Please like, share the following link as well as subscribe to the channel to receive notification when we go LIVE!

You can also see the live broadcast on this page:

Session 20 : Approach towards retrofitting of the structures
Categories
Earthquake Engineering News & Events Structural Engneering

Session 11 : Amendment no. 2 for IS 1893 (Part 1) : 2016 & IS 13920 : 2016

Recently, BIS published the amendments related to IS 1893 (Part 1) : 2016 & IS 13920 in November, 2020. The article shows some of the major changes made in the code as per my understanding. Only brief details are mentioned below, for details please refer the amendments.

Amendment no. 2 of IS 1893 (Part 1) : 2016

1.     Clause related to vertical earthquake shaking is modified. The requirements are added for embankments, dams, bridges, etc. Also, the criteria for consideration of vertical earthquake shaking are modified. 

2.     The methodology for calculation of torsional irregularity is updated. The maximum displacement should be checked against the average displacement as against the minimum displacement in the previous version of the code. For more details, please refer the amendment.

 3.     For a building with re-entrant corners, three dimensional dynamic analysis to be performed with the flexible floor diaphragm. If there is a rigid diaphragm in the building then two separate analysis to be performed, firstly with flexible diaphragm and secondly with the rigid diaphragm. The worst effects to be considered from both the analysis.

 4.     For out of plane offset in vertical elements, the forces and moments due to earthquake effects in the elements connecting the two vertical elements with out of plane offset elements, the vertical element supporting the offset, and connections shall be enhanced by a factor of at least 2.5.

 5.     The provisions for stiffness irregularity are further clarified and few changes are made as well. In the note, it is mentioned that this provision is not applicable to such storeys, which have: (a) lower height, where services and utilities are housed, or (b) outrigger frame members placed in them.

 6.     For weak storey irregularity – buildings with strength irregularity shall not be permitted. In case, the weak storey is because of URM infills, provisions of 7.10 shall be followed.

 7.     Floating columns – Such columns are likely to cause concentrated damage in the structure, and are undesirable. A building with floating columns shall not be permitted, if the floating columns are part of or supporting the primary lateral load resisting system.’

 8.     Irregularity related to “Irregular Modes of Oscillation in Two Principal Plan Directions” is further clarified. It is also mentioned that this provision is not applicable to buildings with large podiums in the lower storeys.

 9.     For importance factor, “school” is replaced with the “educational building”.

 10.  OBF is not allowed in seismic zone III, IV & V.

 11.  Provisions for flat slab – structural wall system are further clarified.

 12.  Formula for Aw is modified and now it is same as when the code was published in 2016. It is mentioned that The value of Ta obtained shall neither be taken to be more than that given in 7.6.2 (a) nor less than that given in 7.6.2 (c).

 13.  In case of URM, RC members shall be designed for the governing combinations of stress resultants arising from structural analysis of:

a) Bare frame building, and

b) Frame building with URM infills.

14. For other details, please refer the amendment.

 Amendment no. 2 of IS 13920 : 2016

1.    Steel reinforcement shall comply with all of the following:

a) Elongation shall be at least 14.5 percent,

b) Ratio of ultimate stress to 0.2 percent proof stress shall not exceed 1.25,

c) Ratio of ultimate stress to 0.2 percent proof stress shall be at least 1.15, and

d) Steel shall be only of strength grades with minimum 0.2 percent proof stress of 415 MPa, 500 MPa or 550 MPa, in addition to other requirements of IS 1786.’

 2.     In cl no. 9.1.1, modifications are made for calculation of nominal shear strength of concrete in a beam-column joint.  

3.     In cl no. 9.1.2, provisions related to design shear stress demand are further clarified.

4. For other details, please refer the amendment. 

We are planning live technical discussion for the amendments on 20-DEC-20 at 11:00AM IST. Please share your comments / discussion points in the below comment box. We will discuss the same during live session of 20-DEC-20.

Link of the live session is attached below. Please like and share this video with the interested engineers in your circle.

Session 11 : Recent amendments for IS 1893 (Part 1):2016 and IS 13920:2016 – Live discussion

An online course related to earthquake resistant design will start from 17-MAR-22. Please watch the introductory video below:

EQ-STR-002 : Learn concepts of earthquake resistant design

Click below for more details and registration for EQ-STR-002