2. It is understood that since the beginning of this year, due to the adjustment of raw material prices and the double control of energy consumption, the prices of many commodities in China are very high, among which the prices of ceramics, steel and waterproof coatings are rising. Many friends who are going to decorate next year have already begun to consider the price of building materials next year. Building materials circulation market experts said that the price trend of steel bars and cement will still have room to rise. Because of the current national power cut, the market supply and demand are tight, and the production capacity of steel bars and cement is restricted by mechanical equipment, so it is impossible to increase production indefinitely. However, the market demand is gradually increasing, which leads to tight supply and demand. In 2022, the prices of steel bars and cement may rise, but the increase is not large. It is estimated that the price of building materials will run at a high level in 2022, but it is still inconclusive. It can be predicted that the skyrocketing price will remain the focus of the whole industry for some time to come.

1. The latest prices in the building materials industry are as follows: the price of rebar has risen to 5,495 yuan/ton, which is 2,000 yuan/ton higher than that at the beginning of the year, with an increase of over 50%. The average price of tertiary seismic rebar for 20mm building is 5392 yuan/ton. The average price of 4.75mm hot rolled coil is 5797 yuan/ton. World Steel Association: It is predicted that by 2022, the global steel demand will increase by 2.7%, reaching19.25 million tons. It is cheaper to buy materials in summer and winter. This is because Xia Dong belongs to the off-season of decoration, and the summer is generally from late June to the end of August. During this period, the south is in the rainy season, while the north is rainy and humid. Therefore, when decorating, the walls and floors are not easy to dry out, and it is easy to bulge in the future, and the smell after decoration is not easy to distribute.

2. Matters needing attention When purchasing reinforced concrete, the design of the existing structure should comply with the regulations:

1) HRB400, HRB500, HRB400 and HRB500 are suitable for ordinary steel bars subjected to longitudinal stress, and HPB300, HRB335, HRB335 and RRB400 can also be used;

2) HRB400, HRB500, HRB400 and HRB500 should be used as ordinary reinforcement for beams and columns subjected to longitudinal stress.

3) stirrups should be HRB400, HRBF400, HPB300, HRB500 and HRBF500, or HRB335 and HRBF335.

4) Prestressed steel wire, steel strand and prestressed threaded steel bar should be used for prestressed reinforcement.