What is the manufacturing process of prefabricated steel warehouse?

The manufacturing process of prefabricated steel warehouse at the factory is very important because the accuracy, quality of the components and the completion of a pre-engineered steel frame house project can guarantee or not completely due to the process.

Prefabricated steel frame factory structure

The finished machining drawings will hand over to the production department and the components will process and manufacture according to the following process:

• Cut workpiece, code
• Combination rack
• Combination welding
• Structural molding
• Mounting, soldering the link codes, drilling holes
• Cleaning, spraying
• Paint
• Cut workpiece, code

Forms of prefabricated steel warehouse

Profiled steel (or cast steel)

Composite steel: the members combine welded from steel plates together.

Moreover, profiled steels H, U, C shape steel structures… which are molded from billets and have a certain size.

Manufacturing process of composite steel structures

The belly and wings of the members are cut from steel plates with basic thicknesses of 6mm, 8mm, 10mm, 12mm, 14mm… by CNC machines and hydraulic cutting machines.

Mounting of component assemblies

The flanges and bellies of the prefabricated steel warehouse after cutting position correctly and assemble by temporary welds.

Automatic welding

After correct welding, the member is put into the automatic welding machine. To ensure the correct welding technique and best quality, it is necessary for experienced workers to adjust the welding wire, solder and welding current appropriately.

Welds check with the naked eye, checked for quality by ultrasonic or magnetic tests, macro tests.

Seam welding by automatic welding machine

The high temperature of the welding process causes the components to warp. Moreover, to ensure that the components have correct erection, the members must calibrate, straighten and check thoroughly before moving on to the next step.

The straightener helps the prefabricated steel warehouse not to warp after welding

Welding of ciphertext, reinforcing ribs, drilling holes

After the members weld and calibrate, the reinforcing ribs and plates hand-weld the most skilled welders to ensure accuracy.

Drill the link hole with a magnetic drill

Ball blasting/sandblasting and surface cleaning of components

Components after process move to the sanitary area. Here, the components clean to rust the surface and treated with a shot blasting machine before moving on to painting as the final finishing work. After finishing the components, they are put into the shot blasting machine

Clean components before painting prefabricated steel warehouse

The durability of steel structures during construction and during use depends a lot on the painted surface to protect the structure from the effects of the environment. Moreover, the components paint with 1 layer of anti-rust paint and 2 layers of color paint with the color depending on the investor’s requirements.

Anti-rust paint for steel structures

After that, the components gather at the yard and check and stamp according to the part number according to the Design Drawing.

To better understand the steel structure processing standards and the construction process of the erection house at the construction site, please refer to the article:

What is pre-engineered steel house?

Pre-engineered steel buildings, also known as pre-engineered buildings, are houses made from structural steel components, usually manufactured at the factory and transported to the construction site for erection.

Moreover, prefabricated houses use most often for projects of factories and warehouses because of their flexibility, ability to exceed large spans and fast construction.  In addition, civil pre-engineered steel buildings also use a lot recently in big cities, typically for projects of supermarkets, showrooms, restaurants, high-rise buildings.

Basic parameters of prefabricated steel warehouse

However, steel structure is the optimal solution in industrial factory construction from the past to present, in the past, we use to use the same frame as the truss frame made of steel V, steel box.

Since the introduction of pre-engineered steel frame technology, Moreover, it has become an irreplaceable solution for factories, warehouses and office buildings, garages…

The pre-engineered steel frame workshop has a number of characteristic parameters:

1. Aperture: Is the horizontal distance of the factory
2. Column step: Is the distance between 2 columns along the house. Normally from 6m to 12m
3. Building height: Is the height of the boundary column, which determines the ventilation of the prefabricated steel warehouse.
4. Roof slope: The roof slope is usually chosen from 10% to 30% to ensure rainwater drainage
5. Background load: Depends on the factory’s functions such as layout of machinery, trucks and transport vehicles.
6. Roof load: Including corrugated iron roof and insulation panels, false ceilings, engineering systems, wind loads, cranes.

Design and manufacture of pre-engineered steel frame factory

Moreover, the design of steel buildings carried out by the engineers and architects of the construction unit will optimize the structure, structural details and functional solutions for the factory.

Manufacturing steel structures at the factory

After agreeing on the architectural and structural plan of prefabricated steel warehouse. However, the contractor will deploy detailed processing drawings of the components and transfer the drawings to the factory to prepare for the processing of steel structural members.

The basic machining process includes the following steps:

• Cut the workpiece
• Component profiling
• Combination welding
• Stitching code, stiffening tendons
• Component cleaning
• Anti-rust paint and color paint

To know more about the steel structure production process at the factory, you can see the article: Steel structure manufacturing process

Construction of prefabricated steel warehouse

However, the components after processes it will transport to the construction site for erection. Moreover, the steel structure erection process includes several steps:

• Locating and installing foundation bolts
• Erection of columns, beams and trusses
• Erection of purlins
• Covered corrugated iron roof

The process of manufacturing components is completely in the factory, so the correct erection or not completely depends on the manufacturing process and the placement of foundation bolts. Moreover, these are two jobs that must be carefully checked because there are many potential risks leading to deviations in later erection work.

Prefabricated steel frame factory structure

In addition, civil prefabricated steel warehouse also uses a lot recently in big cities, typically for projects of supermarkets, showrooms, restaurants, high-rise buildings.

Foundation structure system

• Factory background
• The main structural frame system includes columns and trusses
• Skyroof and canopy
• Purlins and bracing
• Covered corrugated iron roof
• Steel Buildings