The main differences between the American standard light steel keel villa and the Australian standard light steel keel villa are as follows:

● Structural cost: The cost of galvanized steel Q235 and Q345 used in the American standard is relatively cheaper than the price of Q460, Q500, and Q550 aluminum-zinc steel used in the Australian standard.

● Steel quantity: The American standard uses a large amount of steel and has good sensory performance, while the Australian standard looks relatively thin.

● Wall thickness: The American standard has thicker outer wall than the Australian standard. The thickness of the outer wall is mainly determined by local climatic conditions.

In addition, the keel material used in the Australian standard light steel keel villa is G550AZ150, which meets the standards of Australia and New Zealand, with a cross-section of 90mm. The keel material used in the American standard villa is Q550Z275, where 550 represents the value of the yield point, that is, if this force is reached, it will deform, but if it is an integral structure, it cannot be judged only by the value of a single material.

There are also the following differences in the structural design between the American standard light steel keel villa and the Australian standard light steel keel villa:

● Floor system: The cross-sectional height of the floor joist keel of the American standard light steel keel villa is usually 150-300mm, and the steel plate thickness is about 0.84-2.56mm; the cross-sectional height of the floor joist keel of the Australian standard light steel keel villa is usually 150-300mm, and the steel plate thickness is about 0.84-2.56mm.

● Wall system: The cross-sectional height of the C-shaped keel of the American standard light steel keel villa is generally 93-200mm, and the steel plate thickness is generally between 0.80-1.91mm; the cross-sectional height of the C-shaped keel of the Australian standard light steel keel villa is generally 93-200mm, and the steel plate thickness is generally between 0.80-1.91mm.

● Roof truss system: The roof truss of the American standard light steel keel villa can be directly composed of light steel rafters or light steel trusses; the roof truss of the Australian standard light steel keel villa is usually directly composed of light steel rafters.