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Reduce the quality of the project, and the use of low carbon steel instead of rebar. For large engineering projects, often appear to "project inspector", to replace the steel rib steel "Choulianghuanzhu", reduce the construction cost. In the design, because the members allowed to provide "stirrup stress support", the main role is to keep the shape and location of longitudinal reinforcement, steel strapping has a smooth surface, accurate positioning, therefore, in addition to longitudinal reinforcement, licensing round steel stirrups. The longitudinal reinforcement must be made of rib steel.s
In general, 8 of the bilayer is better than 10 of the single layer.(1) the reinforcement of cast-in-place slab shall be designed according to the principle of fine reinforcement.(2) the cast-in-place slab shall be controlled with a minimum reinforcement ratio greater than 0.25%.s
Finishing rolling rebar strength than ordinary ribbed steel bars to be high, with spiral thread, tension nut after solid increase concrete prestressed (equivalent prestressed steel wire, steel wire type).s
Individual numbers 3, 4 and 5 indicate strength levels of steel bars 335MPa, 400MPa and 500MPa, characters 3E, 4E and 5E, respectively, and mark the corresponding strength levels of seismic reinforcement. C3, C4 and C5 mark fine grained reinforcing steel bars of corresponding strength grade, and C3E, C4E and C5E identify fine grain reinforced steel bars of corresponding strength grade.s
Thread steel small specifications of 101214, in the specifications of 1618202225, large specifications of 2832, size, specifications, in general, in accordance with the specifications on the basis of 20-100 yuan, if the larger 364042.It is a smaller disk 6.5810, because too small easy to bend, so the coiled coil shape, called disk.s
Specify the construction drawing is HPB300 is hot rolled round bar, that is HRB335, HRB400 is the hot rolled ribbed bar. Don't call thread steel, this name has long been abandoned. Simple, light marked wall column reinforcement detail construction drawing on the diameter and spacing is not encrypted, what non encrypted area, like the dense spacing.s
According to statistics, China's construction industry accounts for about 50% of the total steel consumption. As one of the resources consuming industries, the construction industry must adjust the consumption structure of construction materials, energetically apply high-strength steel bars and high-performance coagulation, and take the road of economical development. If the current use of steel and concrete to raise an intensity level, it can bring enormous savings to society. For example, by calculation, according to the standard requirements, if the reinforced concrete leading force steel strength increased to 400-500N/mm2, then can be in the current level of steel consumption to save about 10%.s