Industrial Welding Work

We Sterling Infrasteel specializes in providing complete solutions including consulting, design, fabrication and erection of high-quality pre-engineered steel building and steel structure products. We provide customers with full steel structures such as factories, warehouses, high-rise building, heavy industry, shopping mall, exhibition center’s infrastructure (railway stations, airports etc.) oil and gas and leisure structures. The company maintains a strong reputation for delivering customer- designed and cost- effective solutions for steel buildings that are manufactured to the highest quality standards, and a commitment to providing top class service to our customers. Our commitment to excellence provides unmatched product quality, coupled with speed, safety and superior sales services. The major components of PEB are divided into different types which are mentioned below: A typical assembly of a simple metal building system is shown below to illustrate the Synergy between the various building components as described below: Primary Frames Secondary Frames Sheeting and Insulation Accessories PRIMARY FRAMES 1) Main Framing – The main frames include steel rigid frames of the building. The PEB steel rigid frames include tapered columns and tapered rafters. These tapered sections are fabricated using the state of the art technology while the flanges are welded. The frame is then erected by bolting the splice plate of the connecting section together. All rigid frames shall be welded built-up “I” sections or hot-rolled sections. The columns and the rafters may be either uniform depth or tapered. Flanges shall be connected to webs by means of a continuous fillet weld on one side. All end wall roof beams and end wall columns shall be cold-formed “C” sections, mill-rolled sections, or built-up “I” sections depending on design requirements. Plates, Stiffeners, etc. All base plates splice plates, cap plates, and stiffeners shall be factory welded into place on the structural members. Built-up I section to build primary structural framing members (Columns and Rafters). 1.1Columns The main purpose of the columns is to transfer the vertical loads to the foundations. However apart of the horizontal actions (wind action) is also transferred through the columns. Basically in pre-engineered buildings columns are made up of I sections which are most economical than others. The width and breadth will go on increasing from bottom to top of the column. I section consists of flanges and web which are made from plates by welding. 1.2 Rafter A rafter is one of a series of sloped structural members (beams) that extend from the ridge or up-to the wall-plate, down slope perimeter or eave, and that are designed to support the roof deck and its associated loads. Primary framing consists of all structural elements which transfer the load to the foundation and comprise of: Rigid Frames End Wall Frames Wind Bracing Crane Brackets 1.3 Rigid Frames Rigid Frames are structural skeletal members bearing the load of the entire building. These primary members are available in standard ready-made shapes or as channels also for the complicated primary framing system. Other members of a primary framing system are End Wall Frames, Crane Brackets, and Wind Bracing. 1.4 End Wall Framing – The end wall frame of the prefabricated building is designed as a main rigid frame. The beam end wall system of framing consists of columns with pinned ends, supporting horizontal beams as known as end wall rafters. 1.5 End Wall Frames End Wall Frames are one of the essential structural components of the Primary framing system, an important member of Pre-Engineered Buildings. An intermediate column of End wall frame distributes the load of the building equally. 1.6 Wind Bracing Wind Bracings are cross primary supporting members that transfer the loading or seismic forces equally on columns and support all the structural units of a Pre-Engineered Building. Nowadays steel building constructions steel has replaced the heavy conventional structural materials and concrete structure. 1.7 Crane Brackets Some of the essential structural pieces required in a primary framing system are the crane brackets. The crane brackets are the usual effective members holding up the crane’s beams. The crane brackets in a primary framing system carry the load of the crane joists or crane beams and are attached to the columns 2) SECONDARY FRAMES 2.1 Purlins, Girts, and Eave Struts – Purlins, Grits, and Eave struts are secondary structural members used as support to walls and roof panels. Purlins are used on the roof, Grits are used on the walls and Eave struts are used at the intersection of the sidewall and the roof. They are supplied with a minimum yield strength of 34.5KN/m. Secondary members act as struts that help in resisting part of the longitudinal loads that are applied on the building such as wind and earthquake loads and provide lateral bracing to the compression flanges of the mainframe members for increasing frame capacity. Purlins, Grit-sand Eave struts are available in high-grade steel conforming to ASTM 607 Grade 50 or equivalent, available in 1.5 mm, 1.75 mm. 2.0 mm, 2.25 mm, 2.5 mm, and 3.0 mm in thickness. They come with a pre-galvanized finish, or factory painted with a minimum of 35 microns (DFT) of corrosion protection primer. Purlins and girts shall be cold-formed “Z” sections with stiffened flanges. Flange stiffeners shall be sized to comply with the requirements of the latest edition of AISI. Secondary framing consists of elements that support the roof & wall sheeting and transfer the load to the primary framing. These include:– • Roof Purlins • Wall Girts • Eave Struts • Sag Rods 1.1 Roof Purlin A purlin is a longitudinal, horizontal, structural member in a roof.Roof purlins are C or Z-shaped cold form structural components of a secondary framing system with variable depth and thickness by the customized designs. It is used in the shape of a “Z”, a purlin is a horizontal structural member that supports roof covering and carries loads to the primary frame. They are one directional and bolt downhill of the clip. 1.2 Wall Girts The wall girts are cold-formed Z-shaped members, which are of various thickness and variable depth depending upon the design. The wall girts are connected to the external extension of the columns along the walls. 1.3 Eave struts Eave Struts are secondary steel framing members used for support at eaves and high side peaks. It is available as single and double slopes in both up or down style. Available in red oxide or galvanized, Eave Struts are cut to the nearest 1/8″. 1.4 Sag Rods Sag rod is used for preventing the sagging of an open-web steel joist that is used as a purlin with its depth at right angles to a roof slope. It provides lateral support for Girts and Purlins. 2) Roof Sheeting and Cladding Insulation – The steel sheets are normally galvanized and pre painted profile sheets, plain or sheets can be coated with special paints for better anti-corrosion properties. These buildings are properly insulated through insulation slab/rolls and then the roofing steel sheet is fixed over it. The sheets used in the construction of pre-engineered buildings are composed of the following: Base metal of either Galvalume coated steel conforming to ASTM A 792 M grade 345B or aluminum conforming to ASTM B 209M. Galvalume coating is 55% Aluminum and about45% Zinc by weight. An exterior surface coating on painted sheets of 25 microns of epoxy-primer with a highly durable polyester finish. An interior surface coating on painted sheets of 12 microns of epoxy primer and modified polyester or foam. The sheeting material is cold-rolled steel, high tensile 550 MPA yield stress, with hot dip metallic coating of Galvalume sheet. ACCESSORIES Self-Drilling Screw Window Ridge Ventilator Sliding Door Roll up Shutter Turbo Ventilator Roof Skylight Adjustable Louvre Insulation Ladder with Safety Cage 3. Crane System – Crane system in industrial buildings is used to improve material handling productivity allowing more utilisation of space by reducing or eliminating traffic due to forklifts etc. These crane runway beams are supported by built-up sections with cap channels. 4. Canopy – The standard PEB Steel canopy consists of built-up tapered canopy rafters that are cantilevered from the mainframe columns or from the end wall columns, Wall Canopies over Doors, Shutters and Windows at sidewall or ends walls. 5. Mezzanine System – The standard mezzanine framing system consists of a steel deck supported by joists framed into main mezzanine beams. The economy of the mezzanine system s affected by the applied loads and mezzanine column spacing. 6. Ventilator – Ventilation is the process of replacing contaminated indoor air with fresh air from outside the building. 7. Paints and Finishing – Pre-painted steel is produced on modern, high-speed coil painting lines where surface preparation prior to painting, paint application & paint curing is done on a highly automated line under optimum condition. Applications of Pre Engineered steel buildings include:- 1. Houses & Living Shelters. 2. Factories. 3. Warehouses. 4. Sports Halls (Indoor and Outdoor). 5. Aircraft Hangers. 6. Supermarkets. 7. Workshops. 8. Office Buildings. 9. Labour Camps. 10. Petrol Pumps/Service Buildings. 11. Schools. 12. Community centre 13. Railway Stations 14. Equipment housing/shelters.