There are two main types of steel plate: Q235 and Q355.
Q means “bend”, it is for the yield strength.
Q235 is the minimum yield strength 235 Mpa.
Q355 is the minimum yield strength 355 Mpa.
Q235 and Q345 as the popular construction steel materials
They are divided into 4 grades, ABCD. Such as Q235A , Q235B, Q235C,
Q235D.
ABCD refers to the impact test grade. A means that it has not been
impact tested. B means that it has been impact tested at 20 ° C
temperature. C means that it has been impact tested at 0 ° C
temperature. And D means that it has been impact tested at low
temperature of -20 ° C.
Q235A&Q235B, Q345A&Q345B are the most popular.
Q345 is mainly used for main steel frame. Like column, beam, wind
speed resistant column, crane girder...
Q235 is mainly used for secondary steel frame. Like tie bar, brace,
vertical/horizontal support...
The choice of material can be according to the design of the
structure of your specific circumstances. For example, if the
structure is intensity control structure, Q345 can be considered.
If the structure is stiffness control structure, you can choose
Q235. The price Q345 is a little higher, but because of its high
strength, the material can be saved. And the price difference is
not great.
Main steel Frame | Materials | Q355b (equivalent to S355JR, ASTM A572 Gr. 50) Q235b (equivalent to S235JR, ASTM A36) |
H section steel | steel plate thickness: 8-30mm |
Welding | Automatic submerged arc welding |
Rust removal | Sand blasting |
Surface finish | Alkyd / Epoxy zinc paint / hot dipping galvanized |
Connection | By High strength bolts, Grade 10.9, Grade 8.8 |
Secondary steel frame | Angle steel brace | L steel, Q235b, painted / hot dipping galvanized |
Horizontal brace | Steel bar, Q235b, painted / hot dipping galvanized |
Column brace | Steel bar, Q235b, painted / hot dipping galvanized |
Tie beam | CHS, Q235b, painted / hot dipping galvanized |
Connection | By ordinary bolts, Grade 4.8 |
Roof System | Purlin | C/Z purlin, Q235b, pre-galvanized 100g-275g |
Roof panel | Insulated sandwich panel or Corrugated steel sheet |
Edge cover | steel sheet trimming |
Gutter | Stainless steel / Galvanized sheet |
Down pipe | Φ110 PVC-U, Φ150 PVC-U |
Fix Accessories | sealing, self-tapping screws, etc. |
Wall System | Purlin | C/Z purlin, Q235b, pre-galvanized 100g-275g |
Wall | Insulated sandwich panel or corrugated steel sheet |
Accessories | sealing, self-tapping screws, etc. |
Edge cover | steel sheet trimming |
Fix Accessories | sealing, self-tapping screws, etc. |
Door and window | Different sizes and types are possible to custom. |
Additional options | Skylight panel; Roof ventilator; Parapet; Glass curtain wall;
Decorative aluminum panel |
A steel structure is a metal structure made of structural steel
members that are connected to each other to carry loads and provide
complete rigidity.
Cladding system in steel structure construction plays an important
part. It affects the whole building's energy consumption.
Widely Application |
Industrial Warehouse/Workshop | Multi-layers building | Commercial building |
Storage/Shed/Carport | Barn, Stable, Pen | Shopping mall |
Hangar | Poultry house | Sports Stadium / Show room / Office |
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your project ideas | Offer our customized solution & budget | Confirm and start
your project |
Share your project requirements, drawings or ideas as detailed as possible | Our team will develop the best solution based on your
specifications and provide an budget for you. | After your approval,we'll start detailed drawing for production and manage every aspect of delivery and installation. |
Processing Steps of Prefabricated Steel Structure Buildings:
Planning and Design
Prefabricated steel buildings starts with a detailed planning and
design phase. During this stage, the project’s requirements are
identified, and the building’s specifications are established.
Factors such as size, layout, and intended usage are considered to
ensure that the final design meets the client’s needs. The planning
phase also includes obtaining necessary permits and approvals, as
local regulations may impact the building’s design.
Fabrication in the workshop
Once the design is finalized, the components are manufactured in a
factory. The use of advanced technology in the manufacturing
process ensures that the components are of high quality and
precisely engineered for quick assembly.
On-Site Assembly
After the prefabricated components are transported to the site, the
assembly process begins. Since the parts are pre-engineered, they
fit together seamlessly, making the installation process much
faster than traditional construction methods. A skilled team of
workers assembles the steel frame, attaches the wall panels, and
installs the roofing system. Depending on the size and complexity
of the building, the assembly process can take anywhere from a few
days to a few weeks.
Details to confirm to get a quick design and quotation: |
Size | Length × Width × Length |
Building Application | its exact usage or special requirements |
Roof & Wall material | Steel sheet ? Insulated Panel ? Decorative Panel? |
Crane | yes or not? Ton? |
Wind Load | wind speed km/h or m/s or mph? |
Snow Load | snow weight kg/m2 or Kn/m2? |
Door & Window | Sizes? Quantity? Layout? |
Inner Layout | Partition room? |
More requirements | Parapet? Skylight? Ventilation? Canopy? Glass wall curtain? |
