Prefabricated Steel Structure Warehouse Storage Warehousing Facilities

(1)What is pre-engineered steel building?
Pe-engineered steel buildings are a steel structures built over a structural concept of primary members, secondary members, roof and wall sheeting connected to each other and various other building components.

These buildings can be provided with different structural and non-structural additions such as skylights, wall lights, turbo vents, ridge ventilators, louvers, roof monitors, doors & windows, trusses, mezzanine floors, fascias, canopies, crane systems, insulation etc., based on the customer's requirements. All the steel buildings are custom designed to be lighter in weight and high in strength.

(2)Model of pre-engineered steel buildings

(3)Applications of pre-engineered steel buildings
Pre-Engineered Buildings are the most flexible solutions for contractors and owners. With the advantages of low cost, high durability, perfect quality control and fast erection; PEBs are used for various applications such as factories, warehouses, logistics center, showrooms, shopping malls, schools, hospitals, community buildings, etc…
The application of PEBs:
Industrial: Factories, Workshop, Warehouses, Cold Storages, Steel Mills, Assembly Plant
Commercial: Showrooms, Supermarkets, Offices, Shopping Centers, Exhibition Halls, Restaurants, Logistic Centers, Multi-pupose Buildings
Public: Schools, Hospitals, Conference Halls, Laboratories, Museums, Stadiums

Others: Farms, Utility Shelters, Pump Stations, Aircraft Hangars, Airport Terminals

1. Cost Savings

2. Quick Erection

3. Flexibility

4. Energy Efficiency

Sandwich Panels

PRIMARY MEMBERS / MAIN FRAMES
Primary members are the main load carrying and support members of a pre-engineered building. The main frame members include columns, rafters and other supporting members. The shape and size of these members vary based on the application and requirements.

SECONDARY MEMBERS / COLD FORMED MEMBERS

Secondary structural framing refers to purlins, girts, eave struts, wind bracing, flange bracing, base angles, clips and other miscellaneous structural parts.
Purlins, girts and eave struts are cold formed steel members which have a minimum yield strength of 345 MPa (50,000 psi) and will conform to the physical specifications of GB/ISO/CE or equivalent.

ROOF & WALL SHEETS/PANELS
Standard steel panels are 0.3,0.4 0.5 mm or 0.6 mm thick and have a minimum yield strength of 345 MPa. Steel panels are hot dipped and galvanized with zinc or zinc-aluminium coating.  The base material is pretreated, before applying a corrosion resistant primer and top coat. The combined thickness of the painted film is 25 microns on the front side and 12 microns on the reverse side.

OTHER BUILDING ACCESSORIES
Other building accessories include anchor bolts, fasteners(bolts, nuts, turnbuckle, expansion bolts), gutters, downspouts,doors, windows,ventilators,skylight panels,louvers and all other building-related materials.

(6)Manufacturing programm and method statement on the steel structure:
The purpose of method statement is to describe the guidelines and methodology followed by our company during the fabrication, blasting, painting and supply of pre-engineered structure for any of steel building project.

A:Material receiving procedure:

Verify the receiving documents and quantity of the received material by stores.
Submit the load for QC inspection by stores.
As a first inspection QC shall perform Visual inspection to confirm the surface condition and for any damages including the condition of packing and wrapping.
QC shall perform the dimensional inspection if the material found accepted in visual inspection and the material will be returned to supplier if it is rejected.
In the dimensional inspection, QC shall check the all over dimensions such as length, width, depth, thickness etc.
Once the material is accepted in dimensional inspection, the supporting documents like MTC will be verified by QC to ensure that the heat number in the material is matching with the heat number in the received material.
QC shall prepare the Incoming Material Inspection Report as per the inspections carried out above.

B:Preparation of material

Design and Development department will make the drawings of the structural of project. As per the drawings, production department will prepare the items. The preparation of items is divided into two.
PREPARATION OF PLATES
The drawings shall be transferred to the any storage device using the expert software.
These drawings shall be copied into the plate processing machine.
According to  the  drawings,  the  preparation  of  the  items  shall  be  carried out.
The automated machine will sense the length of the plate and carry out plate processing according to the fed NC files in expert software. Punching of part mark on the plate will do first.
Drilling of the plates will done as per the NC files in the machine.
Plasma cutting of the plates will be done finally.
PREPARATION OF BEAMS/TUBES etc.
The fabrication drawings shall be prepared by design department and will be fed into the automated cutting and drilling machine.
Next the automated machine will do drilling where ever required as mentioned in the drawings.
After completing the cutting and drilling process the job shall be transferred from drilling machine to fit-up section.

C:Fit-up

The fabrication drawings shall be issued by the production engineer to the production supervisor for execution priority wise
These drawings shall be given to the fabricators for fit-up of job.
The prepared beams and other connection detail items shall be collected by the fabricators for fit-up of the job.
The other items such as end plates, gusset plates, stiffeners, purlin cleats, stay angle cleats etc. shall be fixed in the appropriate places which are mentioned in the fabrication drawing by tack welding.
Once the fit-up of the job shall complete, the production dept. will offer to QC dept. for inspection.

D:Welding&grinding

PROCEDURE-SUBMERGED ARC WELDING
The production supervisor shall plan the jobs to be welded.
Only the items that are fitted and accepted by QC shall be taken for welding.
Clean the location where the welding has to be done free of dust, oil, grease etc.
Set the wire feed and voltage for welding.
The fillet size shall not exceed more than the smaller thickness of the part unless otherwise specified in the drawing.
The fillet size parameters will be maintained according to the chart displayed in the welding area which is prepared based on GB50661-2011 standard
After welding, remove the spatters and slag completely.
Grind off the burrs, sharp edges and excessive reinforcements.