The prefab steel warehouse building is a steel structure warehouse customized according to the customer’s architectural and structural requirements. All components are produced in the factory and then assembled in a reasonable and orderly manner at the construction site.

Fabricated metal warehouse has many uses in its applications, and is suitable for industrial, commercial and agricultural buildings. Compared with other structures (such as wood structure and concrete structure), steel structure has the advantages of high strength, durability, versatility, economy and so on. The raw materials of the steel structure are welded together to form according to the specific requirements of the metal structure building.

Components of prefabricated steel warehouse building

• Main components: steel column, roof beam, crane beam and floor beam.
• Secondary components include bracing, tie beams, roof purlins, and wall beams.
• Corrugated metal color plate or sandwich plate shall be used for roof and wall panels.

Technical parameters:

• Width length height: there is no size limit according to the needs of customers.
• Roof slope: the average roof slope is 1:10 or 1:12, which is customized according to the roof drainage.
• Column spacing: the distance from the long side of the building to the column axis is determined by the length of the building, and the economic range is 7m ~ 9m.
• Load: including live load, dead load, additional load, wind speed, snow load, internal heavy load of crane, etc.

Design of prefab steel warehouse building

1. Fire protection design of prefabricated steel structure warehouse building

The disadvantage of steel structure is low fire resistance. Although it has no combustion performance without fire treatment, its mechanical indexes will change with the change of temperature.

When the temperature reaches 100 ℃, the tensile strength of the steel decreases and the plasticity increases. When the temperature reaches 250 ℃, the tensile strength of the steel will increase slightly, but the plasticity will decrease. When the ambient temperature reaches 500 ℃, the strength of steel will be reduced to the minimum, resulting in the collapse of metal fabricated buildings. Therefore, when the ambient temperature of the steel structure is above 150 ℃, the thermal insulation and fire protection design must be carried out.

2. Fire protection measures for metal structures

Spraying method refers to coating a layer of fire-resistant coating on the surface of metal structures to form a protective film to improve the fire resistance limit of steel members.

Covering method refers to wrapping the steel structure with calcium silicate board, concrete, brick and other materials, and then forming a protective layer to increase the fire resistance of steel members.

The water spray cooling method is to set up an automatic sprinkler system on the upper part of the steel structure. In case of fire, a continuous water film will be formed on the surface of the steel structure to protect it.

3. set temperature expansion joint

Temperature change will cause deformation of prefab metal warehouse buildings, which will cause thermal stress to the structure. When the plane size of metal buildings is large, in order to avoid high-temperature stress, temperature expansion joints shall be set on the long and wide sides of metal buildings.

4. Antirust treatment

Antirust primer and finish paint are usually used for antirust treatment of steel structures. The number of layers and thickness of the coating usually depend on the environment and coating performance.

Generally, under the action of natural atmospheric medium, the paint film thickness of indoor steel structure is required to be 100 μ m. I.e. two undercoats and two finishing coats. For open-air steel structures or steel structures affected by industrial atmospheric media, the paint film thickness shall be 150μm~ 200μm.

Main Components For Prefab Steel Warehouse Building

Product name	prefab steel warehouse building
Clear span: (width)	6~50m without middle coulumn
Height	2~20m
Length	as your requirment
Material Grade	Q345(S355JR)or Q235(S235JR) steel or as request
Column & Rafter	Welded or Hot rolled H beam
Tie beam	round pipe or square tube or as request
X brace	round steel bar,angle steel or as request
Purlin	C purlin, Z purlin,thickness2.0mm,2.2mm,2.5mm,3.0mm
sag rod	steel round bar, angle, C purlin etc
Wall & Roof	single corrugated steel sheet (0.3~0.8mm) EPS, Rockwool, PU sandwich Pannel (Thcikness:50mm,75mm,100mm,150mm,200mm)
Gate	Electric roller shutter door Sliding door
Exit Door	Plastic steel swing door Aluminum alloy swing door steel swing door
Window	Plastic steel sliding window Aluminum alloy sliding window
Surface	Shot blasting with anti rust paint hot dip galvanize
Certificate	ISO99001,CE EN1090 EXC2 ,IWE etc
Quality Control	The third party ,SGS, ASIA INSPECTION all accept
Crane	5MT, 10MT, 15MT, etc.
Other accessories	gutter,flash trimming cover,down spout, ventilation fiting, skylight belt,bolt, anchor bolt, self tapping screw etc
Package	main steel frame  load in 40’OT,roof and wall panel load in 40’HQ!

Type of roof structure