Project dimension: 32*70*12m with 16.8*23m partition room

Project location: Algiers, Algeria

Project function: Brick machine production line

The client is contractor and also Dorian regular client, he ordered a steel structure warehouse from Dorian in 2019.

After that, client lost the contact with Dorian because of personal reasons. Until this year, client contacted Dorian proactively and revealed that the previous project is still in very good condition right now, and he plan to purchase the another project from Dorian at the early of 2026. The client also mentioned that he would take the final client to visit Dorian factory at the end of November.

The final client is in the brick manufacturing market and he want to expand his business, so he inquired a workshop to our contractor client. The project dimension is 32*70*12m workshop to be used as brick machine production line. The roughly layout drawing was provided by client and Dorian engineer made two proposals (metal sheet roof&wall, and rock wool sandwich roof&wall panels) for the project based on the client requirement for comparison.

In the afternoon of November 29^th,2025, Dorian team picked up the clients from the Zhengzhou City to the factory. Firstly, Dorian team discuss the project details at the office, the client took the updated drawing with them, the partition rooms were required to be added inside and the dimension is 16.8*23m, which will be used for maintaining and drying the brick after finish the production, the height will be determined after client backed to Algeria and confirmed with his family members, the 50mm thickness rock wool sandwich panels will be adopted as roof and wall materials to keep insulation performance for partition rooms. 

Furthermore, the column spacing in client’s drawing is 8m, Dorian engineer suggest adopting 6m, since the total materials weight of 6m columns spacing will be less than 8m and also will be cost-saving. Generally speaking, the anti-corrosion performance of hot-dip galvanized are the better than paint, but its cost will be higher a lot, so client also required this proposal to compare. Finally, the client requested Dorian to provide 12 proposals based on the latest drawings, including the hot-dip galvanized and Painting proposal, 6m and 8m columns spacing proposal, Metal sheet roof + wall, Insulation wool roof + rock wool sandwich wall panel, in order to compare and find the most suitable solution.

After the discussion the project details, Dorian team took the client to the production workshop, the production process of steel columns, beams, purlines and panels were introduced to the clients, they can see all the production details from raw materials, manufacturing process, including the cutting, drilling, welding, blasting and painting process. The final client was pretty satisfied with Dorian’s quality and profession.

Finally, we took the client to have dinner and sent them to the Zhengzhou City in the evening. The next cooperation will start soon.

The 12 proposals and quotation were provided to client within one week after confirm the project details, and the client is discussing with his family.

There are other points is worth to mentioned, Dorian can produce about 100 tons of goods per day, there are submerged arc-welding machine can meet the highest 2.5m goods to do large span of steel structure projects, blasting machine can blast the dust and welding slag and can also increase the adhesion of the steel surface.

For the painting, there are normally two layers of alkyd paint for the steel surface if no special requirement, and the thickness of paint can reach 120um. Moreover,, there are also epoxy zinc rich paint and hot-dip galvanized can be optional if you have higher anti-corrosion performance, the thickness of hot-dip galvanization can normally reach 80um. Other equipment, like crane can also be provided if you need, Dorian has professional and reliable partners can produce it.

So far, Dorian has already exported to about 50 countries, like Thailand, the Philippines, Indonesia, Israel, Bahrain, UAE, Oman, Australia, Uruguay, Chile, Peru, Guyana, Jamaica, Salvador, Dominican Republic, Guatemala, America, Germany, UK etc. Dorian factory has been established since 1997 and have rich experience in steel structure market, and Dorian team always adhere to the principle of customer and quality first to provide the excellent steel structure building to the clients all over the world. We also have confidence that we can be the good partner and meet your requirement if you choose Dorian team.

Welcome to your kindly inquiry about our products, we will be here waiting for you anytime. 

Project dimension: 64*175*9m with divisions for different function + 12*32*8m cold storage room

Project location: Lima, Peru

Project function: Processing, warehouse and cold storage room

The client is specialises in frozen foods of industry with a branch company in China, and importing and exporting kinds of frozen foods. In order to expand his business, he inquired about a 384m2 small cold rooms and a 11,200m2 of steel structure building to Dorian in October. The small cold room project will be purchased within this year and big project will be ordered next year. In order to discuss the modification details better, and understand the strength and scale of Dorian factory, the client arranged his engineer to came to China.  

The project details:

Dorian team took about three days of time to finish layout drawing and quotation after confirm the project details.

The detailed dimension of big project is 64*175*9m, Dorian engineer designed double span for 64m side, with 32m for each span. The whole building is respectly two phase, The first one will construct one span and then second phase. The 7m columns space for 175m side, 8m for 64m side considering the loading and economical issues. Since client mentioned that he prefer insulation materials, Dorian team suggested adopting rock wool sandwich panels as roof and wall, because he didn’t reveal that this project need cold storage rooms inside and other different division areas, so the whole project was designed based on a regular warehouse.

For the small cold storage project of 12*32*8m, Dorian team designed PIR sandwich panels as roof and wall, the layout drawing was finished only and didn’t calculate price, because client’s engineer would come to discuss the further modification details.

The client’s engineer and staff arrived in the Luoyang city on November 1^st, Dorian picked up them in the morning and take them to visit factory directly. Firstly, the project details of 64*175*9m project were been talked, during the process of communication, Dorian team learned that the whole building need to be designed into four areas, respectively reception areas, processing area, warehouse area and cold storage area, but the exact dimensions for each area have to be confirmed with their department after backed to Peru. Except the cold storage area adopt 100mm PIR sandwich panels, other area will use rock wool sandwich panels.

For the small cold storage project, the client also requested second proposal to use metal sheet for the exterior roof and 100mm PIR sandwich panels as interior ceiling and wall for comparing.

The definition and function of Rock wool sandwich panel:

Rock wool board, also known as rock wool insulation and decorative board, is an inorganic fiber board made primarily from basalt through high-temperature melting and processing. It is a new type of insulation, fire-retardant, and sound-absorbing material. The artificial inorganic fibers produced through high-temperature melting and processing give rock wool board the characteristics of being lightweight, having low thermal conductivity, absorbing heat, and being non-combustible.                          

The definition and function of PIR sandwich panel:

Polyisocyanurate (PIR) is used in Sanhemei composite boards. PIR is formed through the trimerization of isocyanurate, introducing a cyclic structure and a high isocyanurate index into the compound, resulting in a dense polyisocyanate. This makes the internal rigid foam more stable and provides high heat resistance and flame retardancy. Experiments have shown that it can withstand temperatures up to 200 degrees Celsius for short periods and up to 160 degrees Celsius for long periods.

PIR foam generally achieves a fire resistance rating of B1, with a water absorption rate of up to 0.9%. Its temperature resistance range is approximately -196℃ to +205℃, all of these performance making PIR composite boards ideal for cold storage applications.

After confirmed all the project details, Dorian team take client to the production workshop, the production process of steel columns and beams, purlines and panels were introduced to the client, because the project is close to the sea and it needs  have anti-corrosion effect, so Dorian recommend two kinds of proposals (epoxy zinc rich paint and hot-dip galvanized) for comparing the cost. Both proposals have corrosion prevention effect, but the performance of hot-dip galvanized will be better and cost will be also higher accordingly .

The client’s engineer was amazed that Dorian factory have so many of production workshops, and the quality of product was also highly praised by client’s engineer, the were pretty satisfied with this visiting.

Dorian team have sent update proposal and quotation to client for his small 12*32*8m project already, and the modification details are waiting for client’s feedback.