#Piling Contractors in Kolkata

[steelsolucio]

Piling Contractors in Kolkata – Trusted Services by Steel Solucio

When it comes to construction and foundation work, the role of piling contractors in Kolkata cannot be overstated. Proper piling ensures a stable, reliable foundation for various types of structures, from residential buildings to large industrial projects. At Steel Solucio, we specialize in offering comprehensive piling services that meet the highest industry standards. In this blog, we’ll discuss the importance of hiring professional piling contractors in Kolkata and why Steel Solucio should be your first choice for piling needs.

Why Choose Piling Contractors in Kolkata?

Piling is an essential part of many construction projects, especially in areas where the ground may not be stable enough to support heavy structures. Kolkata, with its unique soil and environmental conditions, requires expert knowledge and experience when it comes to piling. The work involves driving large columns (or piles) deep into the ground to anchor the structure firmly. This ensures that even in soft, weak, or waterlogged soil, your building remains stable and safe.

Professional Expertise

Choosing experienced piling contractors in Kolkata like Steel Solucio ensures that the job is done correctly the first time. Piling contractors bring years of expertise to the table, using state-of-the-art equipment and techniques to ensure the best results. Steel Solucio offers services ranging from bore piling and CFA (Continuous Flight Auger) piling to sheet piling, each suited to different ground conditions. Our expert team is equipped to handle complex projects with the precision and professionalism you require.

Cost-Effective Solutions

Many contractors promise cheap services, but they may not have the expertise required to perform the job correctly. Hiring professional piling contractors in Kolkata from Steel Solucio helps prevent costly mistakes that could arise from substandard work. We provide cost-effective piling solutions while ensuring that quality is never compromised. With Steel Solucio, you are assured of long-lasting and efficient piling that will save you money in the long run.

Safety Assurance

Foundation work comes with its set of risks, and improper piling can lead to structural issues, jeopardizing both the integrity of the building and the safety of the people inside. That’s why hiring piling contractors in Kolkata like Steel Solucio is crucial. We follow strict safety protocols and guidelines to prevent any accidents or mishaps during the piling process. Our team is trained to handle all potential challenges with precision and care, ensuring that your project is safe at every step.

Custom Solutions for Every Project

Every construction project is unique, and the approach to piling must be tailored accordingly. At Steel Solucio, we understand that the needs of each client differ. Whether you’re working on a residential, commercial, or industrial project, we provide custom solutions that align with your requirements. Our team will assess the site conditions and recommend the best piling method to ensure a stable and durable foundation.

Timely Completion

One of the most significant advantages of working with experienced piling contractors in Kolkata like Steel Solucio is our commitment to timely project completion. We understand the importance of deadlines in construction, and we ensure that our piling services are completed on schedule. This helps to avoid delays and ensures that your project proceeds without interruptions.

Environmental Considerations

Steel Solucio also takes environmental impact into account during every phase of the piling process. We strive to minimize disruptions to the surrounding environment, including soil and groundwater. Our advanced technology and methods are designed to be environmentally responsible while providing the most effective foundation solutions.

Our Piling Services

At Steel Solucio, we offer a range of piling services tailored to suit your project’s unique requirements. Some of the services we provide include:

Bore Piling – Ideal for areas with limited space or where minimal disturbance to the site is required.

CFA Piling – A technique best suited for soft or loose soils, providing a deep foundation.

Sheet Piling – Commonly used in waterfront locations or areas prone to water infiltration.

Our team will help you choose the best option for your specific needs, ensuring the highest quality results.

Conclusion

When it comes to piling contractors in Kolkata, Steel Solucio stands out as a trusted name. Our experience, professionalism, and commitment to safety make us the ideal partner for your next construction project. Whether you're building a home or a commercial structure, we offer the expertise and services needed to ensure your foundation is stable, secure, and long-lasting.

Contact Steel Solucio today to discuss how our piling services can help you achieve a reliable foundation for your project.

[gssoftwareposts]

A Contractor’s Guide - Selecting Strong Steel Sheet Piles For Construction

Sheet piles are thin retaining wall used mainly for the basement construction of underground enclosures and deep basements of commercial and residential buildings. Sheet pile or sheet piling is a form of conventional piling of steel sheets in deep easements to support the wall thickness at the root  which provides additional support to the wallet the ground level.

How to identify High-Quality Sheet Pile?

In order to ensure the quality of sheet pile they need to be carefully monitored and inspected by contractors in Kolkata. The design and specifications are vital. Test the mechanical performance of the product such as tensile strength, anti corrosion for best corrosion resist sheet piles. Steel sheet piles generally costs upto 54% less to install when manufactured  by the leading sheet pile supplier Steel Solucio because they are made of vibrationless method. Start by assessing the material quality, ensuring that the sheet piles are made from high-grade steel, such as ASTM A572 or A690, and offer good corrosion resistance, particularly for marine environments. The dimensional accuracy is also important; high-quality sheet piles will have uniform thickness and precise interlocking mechanisms to prevent gaps and ensure structural integrity. The surface finish should be smooth, free from imperfections like cracks or rust, with any protective coatings evenly applied. Additionally, these sheet piles should adhere to international manufacturing standards like ASTM, EN, or JIS, and come with certifications or documentation to confirm compliance. Strength and durability are critical; high-quality sheet piles should have a high load-bearing capacity and be able to withstand bending and stress without deforming. Choosing sheet piles from reputable manufacturers with a proven track record and strong after-sales support is also essential. Finally, consider third-party testing and certifications, as well as the environmental impact, to ensure you are selecting a product that meets both performance and sustainability standard

Why choose  Steel Solucio Sheet Piles?

Steel Solucio Sheet Piles offers numerous advantages for construction and infrastructure projects. These sheet piles are renowned for their exceptional strength and durability, making them ideal for withstanding harsh environmental conditions and heavy loads. Steel Solucio Sheet Piles are designed with precision engineering, ensuring a tight interlocking system that provides superior structural integrity and resistance to soil and water pressures. Additionally, their versatility allows them to be used in a wide range of applications, from retaining walls to waterfront structures. The ease of installation and removal of these sheet piles also contributes to cost savings and efficiency in project timelines. Furthermore, Steel Solucio's commitment to quality and innovation means that their sheet piles are manufactured to meet the highest standards, offering long-lasting performance and reliability.

[jobskolkata]

Civil Construction || Infra Development || Storekeeper || Site in Charge || Site Engineers || Maldah || West Bengal.

Ideal Career Zone: Where Your Skills Meet Your Passions. The ideal career zone is the sweet spot where your skills and passions intersect. It's the place where you can use your talents to make a difference in the world, while also feeling fulfilled and satisfied. Finding your ideal career zone can be a challenge, but it's worth it. When you're in the right zone, you'll be more productive, more motivated, and more likely to succeed.

Hi we are from IDEAL CAREER ZONE. We are a job placement firm and we are recruiting staffs for different posts for different company.

About Company: A Government Constructor (Design & Construction) of Turnkey Building Projects including design, general Civil & Electrical works, all major associate Works like Fire protection and detection system, HVAC system, Lift installation, Solar system installation, CCTV, BMS, Access control system, STP & WTP, ROMGPS, Medical equipments, road work and all type of interior work related to building construction) and renovation & upgrading works.

Now the company is going to recruits some staffs as:

For the post of Quality Control Engineer:

Required Engineer for the position of : Quality Control Engineer

Number of post: 2 posts.

Experienced required for the post of Quality Control Engineer: At least 10 years experienced required.

Job Description:

Quality control.

Documentation as per Govt. client requirements.

Mix Design, gradation of materials, concrete quality control along with complete site lab controlling etcetera.

Job location: Maldah West Bengal

Salary offered: As per Industry and 10 to 20% hike last drawn Salary.

Accommodation will be provided by the recruiting company.

For the post of Storekeeper:

2nd requirement for the Post of: Storekeeper

Number of post: 2 posts.

Experienced required for the post of storekeeper: At least 12 years experienced required.

Job Description:

Site store management & controlling in govt. project.

Reconciliation, stock statement updating, indenting, material issue management and controlling etcetera.

Job location: Maldah West Bengal

Salary offered: As per Industry and 10 to 20% hike last drawn Salary.

Accommodation will be provided by the recruiting company.

For the post of Site in Charge:

Required Engineer for the position of : Site in charge

Number of post: 2 posts.

Experienced needed for the post of Site in Charge: At least 12 years experienced required.

Job Description:

Complete execution.

Controlling of both structure and finishing work of Govt. project high rise commercial building including piling/pile cap work, Sub-contractor billing.

Client billing, finalization of sub contractor rates.

Client correspondence, attend weekly meetings.

Correspondence to in-house Head Office.

DPR preparations, preparation of work program.

Project monitoring.

Shortfall analysis.

Distribution of work regularly to all concerned staff and monitoring.

Site cash requirement controlling etcetera.

Job location: Maldah West Bengal

Salary offered: As per Industry and 10 to 20% hike last drawn Salary.

Accommodation will be provided by the recruiting company.

Note:- Many more Jobs available just search in Google “Ideal Career Zone” Kolkata.

You can find many more job details in various posts in various companies.

You may call us between 9 am to 8 pm

8 7 7 7 2 1 1 zero 1 6

9 3 3 1 2 zero 5 1 3 3

Or you can visit our office.

Ideal Career Zone

128/12A, BidhanSraniShyam Bazaar metro Gate No.1 Gandhi Market Behind Sajjaa Dhaam Bed Sheet Bed cover Show room Kolkata 7 lakh 4

Thank you for watching our channel Please subscribed and like our videos for more jobs opening. Thank you again.

#CivilConstruction, #InfraDevelopment, #Storekeeper, #SiteinCharge, #SiteEngineers, #Maldah, #Kaliyaganj, #NorthEast, #Howrah, #Banglore, #Haidrabaad, #Delhi, #Pune, #idealcareerzone, #kolkatajobs, #WestBengal, #Silliguri, #Asaam, #mizuram, #Tripura, #Nepal, #India,  #Bihar, #Jharkhand, #Maharastra, #Delhi, #PanIndia, #job, #jobs, #newjobs, #newjob, #latestjob, #latestjobs, #kolkatajobs, #newjobsinkolkat, #civiljobs, #storejobs, #siteengineerjobs, #storekeeperjobs,

[journalmaterialscience-blog]

Kolkata Flyover Collapse- April 2016

Background

Kolkata is the capital city of West Bengal state within the Indian Union. It covers an area of approximately 185sq. km and current population around 5 million. It is situated on the banks of the river Ganges (GANGA) and is one of the most densely populated cities in the country. To overcome the traffic congestion on the major roads in the business districts, the Govt has undertaken construction of several flyovers which has eased the traffic flow in certain localities. One of the recent ones is a 2.5km stretch in Central Kolkata, having 2 serviceable roads with provision for expansion to 4 lanes in future as traffic flow grows. The location of the flyover is shown in the above map of the city.

Construction of the flyover started in 2007 and target completion was scheduled in 2009 to cater to the needs for uninterrupted construction. But due to various constraints specially in getting regulatory clearances as work site situation changed and also due to fund constraint , the contractor had financial difficulties in progressing as per schedule. There was change of govt in between so that the new target was set at 2014. About 75% of the work was completed and it was expected that the facilities will be commissioned in 2016. Unfortunately, on March 26, 2016 part of the flyover structure collapsed causing loss of lives and damage to properties. The magnitude of the accident was so severe that Army had to be called in and it took over 6 days to clear the debris and rescue dead bodies trapped under the debris . It was a heart rendering scene. All photography and approach to the site was banned temporarily. Therefore, this write up is based on information, I could gather from various sources and there may be inadvertent omissions and mistakes (Figure 1-3).

At the proposed workshop, I will try to analyze the factors that may have caused this mishap Few photographs and sketches are included in this analysis.

Go to

Construction

The flyover has to be constructed on a very busy stretch of the city road network. Therefore, the construction must not create hurdles to the traffic flow. Moreover, the area is highly congested so the project must be completed within very tight time schedule. Keeping all these factors in mind it was decided to adopt structural steel structures for the superstructure. Box girders were chosen for columns and beams forming rigid portal frames on RCC foundations supported on bored cast in pipes driven to 45m below the r level. The soil is predominantly sandy clay with mix of gangetic alluvium having bearing capacity around 8 T/m². This required the piles to be on a bed of compact sand stone at average 45m depth. Schematics of the construction shown below.

To expedite the project completion and reduce site work, the super structure was designed using structural steel portal of box sections erected over RCC foundations supported on bored cast in situ piles driven 45m under the GL where a layer of compact sandstone exists. On top of the steel super structure a cast in situ RCC slab 200mm thick was designed topped by a 100mm PC wearing course and finally 50mm thick mastic asphalt surfacing was laid. The live load was as per guideline of various codes and Ministry of Surface Transport, Govt of India. However, as the bridge was not commissioned at the time of accident, the live load was absent. Under this circumstance, the failure was due to other factors as analysed by Failure Mode Effect Analysis (FMEA) which has wide application in industrial plant projects from design stage. The same analogy can be applied in this case with slight difference as Failure Mode and Reason Analysis (FMRA). This is explained by the following diagram.

Application of forensic engineering in root cause failure analysis (RCFA)

In the absence of adequate design data, and restrictions on site visits, the analysis has to be based on scanty information available from various sources. Forensic engineering principles have been applied to ascertain the Root Cause Failure Analysis . It is to be noted that failure has occurred when the bridge was not subjected to any live load from moving vehicles. Thus, it can be inferred that there was some basic design deficiency. The longitudinal beams spanning between the portal hammer head frames had no bracings on the compression flanges to prevent lateral buckling. Such buckling imposed additional horizontal loads on the portal frame box girders . At the portal frame hammer heads the horizontal box girder beams should have extra depth at the knee joint to withstand additional moments resulting from moment redistribution according to stiffness of each member at the joint. The box girders should have internal ribs to withstand torsion forces resulting from torsion and buckling of the girders. The various stages for failure of the portal frame girders are shown below. Thus, it can be concluded that there were inherent design deficiencies from the beginning. The other contributory factors for failure can be attributed to inadequate QA/QC measures at shop and site during fabrication and site erection of the portal frames. Normal practice for acceptance of structural steel is to depend on mill test certificates. In such girders it is advisable to carry out USG tests and Pulse echo testing of steel plates to ascertain that they are free from internal defects. From the failure pattern of the top flange plates of the portal frame box girders, it is clear that there were internal defects inside the plates causing rupture and eventual failure of the top flange. Also the thick plates should have undergone preheating and imposition of inter pass temperature guidelines during welding. It is doubtful how much these were done during fabrication and assembly of the box girders. In the absence of such practice, there is bound to be inbuilt residual stresses inside the plates which lower the yield stress level and are apt to fail when loads come on them (Figure 4-6).

At the workshop all these will be analyzed in details and sample design calculations due to non availability of specific design data, the principle of Reverse Engineering Technology will be demonstrated (Figure 7 & 8).

Risk priority number (RPN): Risk priority number methodology is a technique for analysing the risk associated with potential failures during a FMEA analyses. To calculate risk priority number, severity, occurrence, and detection are the three factors need to determine.

RPN= Severity× Occurrence× Detection (reasons) = 10 x 2 x 4 = 80

In this case since Severity is the main contributor to the RPN Value, therefore, failure can be categorised as highly hazardous

Occurrence (O): Occurrence ratings for FMEA are based upon the likelihood that a cause may occur based upon past failures and performance of similar system in similar activity. Occurrence values should have data to provide justification. An example rating for occurrence is given in the (Table 1).

Risk priority number (RPN): Risk priority number methodology is a technique for analysing the risk associated with potential failures during a FMEA analyses. To calculate risk priority number, severity, occurrence, and detection are the three factors need to determine.

Detection (D) (Reasons): Detection is an assessment of the likelihood that the current controls will detect the cause of failure mode. An example for detection is as shown in (Table 2 & 3).

For more Open access journals please visit our site:

Juniper Publishers

For more articles please click on:

Journal Material Science

[jobskolkata]

For the post of Quality Control Engineer:

Required Engineer for the position of : Quality Control Engineer

Number of post: 2 posts.

Experienced required for the post of Quality Control Engineer: At least 10 years experienced required.

Job Description:

Quality control.

Documentation as per Govt. client requirements.

Mix Design, gradation of materials, concrete quality control along with complete site lab controlling etcetera.

Job location: Maldah West Bengal

Salary offered: As per Industry and 10 to 20% hike last drawn Salary.

Accommodation will be provided by the recruiting company.

For the post of Storekeeper:

2nd requirement for the Post of: Storekeeper

Number of post: 2 posts.

Experienced required for the post of storekeeper: At least 12 years experienced required.

Job Description:

Site store management & controlling in govt. project.

Reconciliation, stock statement updating, indenting, material issue management and controlling etcetera.

Job location: Maldah West Bengal

Salary offered: As per Industry and 10 to 20% hike last drawn Salary.

Accommodation will be provided by the recruiting company.

For the post of Site in Charge:

Required Engineer for the position of : Site in charge

Number of post: 2 posts.

Experienced needed for the post of Site in Charge: At least 12 years experienced required.

Job Description:

Complete execution.

Controlling of both structure and finishing work of Govt. project high rise commercial building including piling/pile cap work, Sub-contractor billing.

Client billing, finalization of sub contractor rates.

Client correspondence, attend weekly meetings.

Correspondence to in-house Head Office.

DPR preparations, preparation of work program.

Project monitoring.

Shortfall analysis.

Distribution of work regularly to all concerned staff and monitoring.

Site cash requirement controlling etcetera.

Job location: Maldah West Bengal

Salary offered: As per Industry and 10 to 20% hike last drawn Salary.

Accommodation will be provided by the recruiting company.

Note:- Many more Jobs available just search in Google “Ideal Career Zone” Kolkata.

You can find many more job details in various posts in various companies.

You may call us between 9 am to 8 pm

8 7 7 7 2 1 1 zero 1 6

9 3 3 1 2 zero 5 1 3 3

Or you can visit our office.

Ideal Career Zone

128/12A, BidhanSraniShyam Bazaar metro Gate No.1 Gandhi Market Behind Sajjaa Dhaam Bed Sheet Bed cover Show room Kolkata 7 lakh 4

Thank you for watching our channel Please subscribed and like our videos for more jobs opening. Thank you again.

#CivilConstruction, #InfraDevelopment, #Storekeeper, #SiteinCharge, #SiteEngineers, #Maldah, #Kaliyaganj, #NorthEast, #Howrah, #Banglore, #Haidrabaad, #Delhi, #Pune, #idealcareerzone, #kolkatajobs, #WestBengal, #Silliguri, #Asaam, #mizuram, #Tripura, #Nepal, #India,  #Bihar, #Jharkhand, #Maharastra, #Delhi, #PanIndia, #job, #jobs, #newjobs, #newjob, #latestjob, #latestjobs, #kolkatajobs, #newjobsinkolkat, #civiljobs, #storejobs, #siteengineerjobs, #storekeeperjobs,

[jobskolkata]

For the post of Site in Charge:

Required Engineer for the position of : Site in charge

Number of post: 2 posts.

Experienced needed for the post of Site in Charge: At least 12 years experienced required.

Job Description:

Complete execution, controlling of both structure and finishing work of Govt. project high rise commercial building including piling/pile cap work.

Sub contractor billing.

Client billing.

finalisation of sub contractor rates.

Client correspondence.

Attend weekly meetings.

Correspondence to in-house Head Office.

DPR preparations, preparation of work program.

Project monitoring.

Shortfall analysis.

Distribution of work regularly to all concerned staff and monitoring.

Site cash requirement controlling etcetera.

Job location: Kaliyaganj North East.

Salary offered: As per Industry and 10 to 20% hike last drawn Salary.

Accommodation will be provided by the recruiting company.

For the post of Storekeeper:

2nd requirement for the Post of: Storekeeper

Number of post: 2 posts.

Experienced required for the post of storekeeper: At least 12 years experienced required.

Job Description:

Site store management & controlling in govt. project.

Reconciliation, stock statement updating, indenting, material issue management and controlling etcetera.

Job location: Kaliyaganj North East.

Salary offered: As per Industry and 10 to 20% hike last drawn Salary.

Accommodation will be provided by the recruiting company.

For the post of Site Engineers.

3rd requirement for the Post of Site Engineer.

Number of post: 2 posts.

Experienced required for the post of storekeeper: At least 8 years experienced required.

Job Description:

Complete knowledge of execution of Government high rise building.

Piling/pile cap work.

Subcontractor billing.

Activity checking during client visit.

Material reconciliation.

Maintain daily work schedule.

DPR

Accommodation will be provided by the recruiting company.

Note:- Many more Jobs available just search in Google “Ideal Career Zone” Kolkata.

You can find many more job details in various posts in various companies.

You may call us between 9 am to 8 pm

8 7 7 7 2 1 1 zero 1 6

9 3 3 1 2 zero 5 1 3 3

Or you can visit our office.

Ideal Career Zone

128/12A, BidhanSraniShyam Bazaar metro Gate No.1 Gandhi Market Behind Sajjaa Dhaam Bed Sheet Bed cover Show room Kolkata 7 lakh 4

Thank you for watching our channel Please subscribed and like our videos for more jobs opening. Thank you again. #CivilConstruction, #InfraDevelopment, #Storekeeper, #SiteinCharge, #SiteEngineers, #Maldah, #Kaliyaganj, #NorthEast, #Howrah, #Banglore, #Haidrabaad, #Delhi, #Pune, #idealcareerzone, #kolkatajobs, #WestBengal, #Silliguri, #Asaam, #mizuram, #Tripura, #Nepal, #India,  #Bihar, #Jharkhand, #Maharastra, #Delhi, #PanIndia, #job, #jobs, #newjobs, #newjob, #latestjob, #latestjobs, #kolkatajobs, #newjobsinkolkat, #civiljobs, #storejobs, #siteengineerjobs, #storekeeperjobs,

[journalmaterialscience-blog]

Kolkata Flyover Collapse- April 2016

Background

Kolkata is the capital city of West Bengal state within the Indian Union. It covers an area of approximately 185sq. km and current population around 5 million. It is situated on the banks of the river Ganges (GANGA) and is one of the most densely populated cities in the country. To overcome the traffic congestion on the major roads in the business districts, the Govt has undertaken construction of several flyovers which has eased the traffic flow in certain localities. One of the recent ones is a 2.5km stretch in Central Kolkata, having 2 serviceable roads with provision for expansion to 4 lanes in future as traffic flow grows. The location of the flyover is shown in the above map of the city.

Construction of the flyover started in 2007 and target completion was scheduled in 2009 to cater to the needs for uninterrupted construction. But due to various constraints specially in getting regulatory clearances as work site situation changed and also due to fund constraint , the contractor had financial difficulties in progressing as per schedule. There was change of govt in between so that the new target was set at 2014. About 75% of the work was completed and it was expected that the facilities will be commissioned in 2016. Unfortunately, on March 26, 2016 part of the flyover structure collapsed causing loss of lives and damage to properties. The magnitude of the accident was so severe that Army had to be called in and it took over 6 days to clear the debris and rescue dead bodies trapped under the debris . It was a heart rendering scene. All photography and approach to the site was banned temporarily. Therefore, this write up is based on information, I could gather from various sources and there may be inadvertent omissions and mistakes (Figure 1-3).

At the proposed workshop, I will try to analyze the factors that may have caused this mishap Few photographs and sketches are included in this analysis.

Go to

Construction

The flyover has to be constructed on a very busy stretch of the city road network. Therefore, the construction must not create hurdles to the traffic flow. Moreover, the area is highly congested so the project must be completed within very tight time schedule. Keeping all these factors in mind it was decided to adopt structural steel structures for the superstructure. Box girders were chosen for columns and beams forming rigid portal frames on RCC foundations supported on bored cast in pipes driven to 45m below the r level. The soil is predominantly sandy clay with mix of gangetic alluvium having bearing capacity around 8 T/m². This required the piles to be on a bed of compact sand stone at average 45m depth. Schematics of the construction shown below.

To expedite the project completion and reduce site work, the super structure was designed using structural steel portal of box sections erected over RCC foundations supported on bored cast in situ piles driven 45m under the GL where a layer of compact sandstone exists. On top of the steel super structure a cast in situ RCC slab 200mm thick was designed topped by a 100mm PC wearing course and finally 50mm thick mastic asphalt surfacing was laid. The live load was as per guideline of various codes and Ministry of Surface Transport, Govt of India. However, as the bridge was not commissioned at the time of accident, the live load was absent. Under this circumstance, the failure was due to other factors as analysed by Failure Mode Effect Analysis (FMEA) which has wide application in industrial plant projects from design stage. The same analogy can be applied in this case with slight difference as Failure Mode and Reason Analysis (FMRA). This is explained by the following diagram.

Application of forensic engineering in root cause failure analysis (RCFA)

In the absence of adequate design data, and restrictions on site visits, the analysis has to be based on scanty information available from various sources. Forensic engineering principles have been applied to ascertain the Root Cause Failure Analysis . It is to be noted that failure has occurred when the bridge was not subjected to any live load from moving vehicles. Thus, it can be inferred that there was some basic design deficiency. The longitudinal beams spanning between the portal hammer head frames had no bracings on the compression flanges to prevent lateral buckling. Such buckling imposed additional horizontal loads on the portal frame box girders . At the portal frame hammer heads the horizontal box girder beams should have extra depth at the knee joint to withstand additional moments resulting from moment redistribution according to stiffness of each member at the joint. The box girders should have internal ribs to withstand torsion forces resulting from torsion and buckling of the girders. The various stages for failure of the portal frame girders are shown below. Thus, it can be concluded that there were inherent design deficiencies from the beginning. The other contributory factors for failure can be attributed to inadequate QA/QC measures at shop and site during fabrication and site erection of the portal frames. Normal practice for acceptance of structural steel is to depend on mill test certificates. In such girders it is advisable to carry out USG tests and Pulse echo testing of steel plates to ascertain that they are free from internal defects. From the failure pattern of the top flange plates of the portal frame box girders, it is clear that there were internal defects inside the plates causing rupture and eventual failure of the top flange. Also the thick plates should have undergone preheating and imposition of inter pass temperature guidelines during welding. It is doubtful how much these were done during fabrication and assembly of the box girders. In the absence of such practice, there is bound to be inbuilt residual stresses inside the plates which lower the yield stress level and are apt to fail when loads come on them (Figure 4-6).

At the workshop all these will be analyzed in details and sample design calculations due to non availability of specific design data, the principle of Reverse Engineering Technology will be demonstrated (Figure 7 & 8).

Risk priority number (RPN): Risk priority number methodology is a technique for analysing the risk associated with potential failures during a FMEA analyses. To calculate risk priority number, severity, occurrence, and detection are the three factors need to determine.

RPN= Severity× Occurrence× Detection (reasons) = 10 x 2 x 4 = 80

In this case since Severity is the main contributor to the RPN Value, therefore, failure can be categorised as highly hazardous

Occurrence (O): Occurrence ratings for FMEA are based upon the likelihood that a cause may occur based upon past failures and performance of similar system in similar activity. Occurrence values should have data to provide justification. An example rating for occurrence is given in the (Table 1).

Risk priority number (RPN): Risk priority number methodology is a technique for analysing the risk associated with potential failures during a FMEA analyses. To calculate risk priority number, severity, occurrence, and detection are the three factors need to determine.

Detection (D) (Reasons): Detection is an assessment of the likelihood that the current controls will detect the cause of failure mode. An example for detection is as shown in (Table 2 & 3).

For more Open access journals please visit our site: Juniper Publishers

For more articles please click on: Journal Material Science