How much steel and cement does it take to build a house per square meter?

Generally, the building steel bar is 8Kg/ m2, so the steel bar is about 2.5t and the cement is about 40t.

Steel bar and concrete are a golden combination. Steel bars mainly bear lateral tension and extrusion pressure, while concrete mainly bears longitudinal pressure. Only by combining the two in a proper proportion can we build a strong beam.

Extended data:

If the amount of reinforcement is too much, the beam constructed in this way is called "super-reinforced beam". When this kind of beam bears great pressure, the concrete will be destroyed when the reinforcement is far from reaching the yield strength. This is also called brittle failure. There is no warning that this danger will happen. Therefore, there is a great potential safety hazard in super-reinforced beams.

Moreover, the steel bars are not fully utilized, which is also an economic waste. In addition, if there are too many steel bars, the spacing between steel bars will be too small, which is not conducive to construction.

Steel bars are used less and concrete is used more. Once the concrete is cracked and damaged, the steel bar breaks in an instant. Although the yield strength of steel bars is high, the ability of steel bars to withstand top-down pressure is only about one tenth of that of transverse tension.

The failure of insufficient reinforcement will make the beam collapse quickly in a short time, leaving little time for people to escape. So it's also dangerous.

Reference source: Baidu Encyclopedia-Super Rib Beam