How to match the girder with steel bars

The beam is to support all the layers above (it is three layers, I think you are talking about the beam on the top of the first layer), the cross-section is 350 * 1000, the lower part of the steel bar is 4 25, the upper part is 22, the lower part of the bent steel bar is bent up with 25, the beam at the column is equipped with 2 negative steel bars 22, strengthen the anchoring force, the stirrups adopt the limb hoop circle 8 spacing 100, and configure the waist bar 4 12, and the tendon circle 8. There is a wall above, and each layer is provided with a ring beam of 240 * 240, two steel bars of 14 on the upper and lower levels, and a spacing of 150 between the hoop circle and 6. But the column section is not enough, you have to get a 450*450 column, and the 240*240 you said is small.

Moreover, this scheme has restrictions on the layout of the building, and the height of the floor is 1 meter, and the beam of 1 meter high is gone by one-third. Either you have to have a high bottom floor, or you have to make a wall at the height of the bottom beam to cover this beam.

2.The beam is set layer by layer, that is, each layer supports each layer, the beam section is 250 * 450, the lower part is 3 roots 20, the upper part is 2 roots 18, and the hoop circle is 8 spacing 150. Each layer is set, and the column section is 240*240.

The above is based on your written description, you can ask for the opinions of others, make a comparison, if you build your own house, you can't be sloppy about the structure.

There are walls above and below the beam, it is a load-bearing wall, just use the ring beam, according to the above ring beam, want to save some money, the lower two layers use 4 14, the upper two layers use 2 12, the cross-section is 240 * 240, the column is 240 * 240, it is called the structural column.

The house should be a brick-concrete structure: cement mortar for the foundation, mixed mortar for the top, MU10 for bricks, solid masonry for the load-bearing part of the wall, and C20 for concrete

First of all, whether I calculate or estimate, I can only use it as a reference.

The cement is marked with ordinary Portland cement. The stressed steel bar is made of secondary steel, and the hoop is made of primary steel bar.

Ratio and reinforcement ratio are calculated by calculation.

It is advisable to control between.

There is a calculation specification for concrete structures, you can take a look at the next one on the Internet, and your question is not specific and too general.

The general cross-section of the span meter girder is made into 200 500, the lower part of the beam is equipped with 3 18, the upper part is equipped with 2 18 stirrups with 8 spacing 200, and the bearing is encrypted with a length of 750 and a spacing of 100. The height of the meter beam is 50cm, which already includes the height of the floor slab, which means that the floor slab of 12cm is only 38cm under the floor. The reinforcement ratio is the ratio of the area of the longitudinally stressed reinforcement in the reinforced concrete member to the effective area of the member (the area of the axial compression member is the area of the full cross-section).

Among them, it is the reinforcement ratio; as is the cross-sectional area of the longitudinal reinforcement in the tension zone; b is the width of the rectangular section; h 0 is the effective height of the cross-section. ρ=as/bh0。The reinforcement ratio is a parameter that reflects the number of reinforcements.

The reinforcement ratio is a parameter that affects the stress characteristics of the component, and the control of the reinforcement ratio can control the failure mode of the structural component, and the over-reinforcement failure and the less-reinforcement failure do not occur, and the reinforcement ratio is the main index reflecting the economic effect. Controlling the minimum reinforcement ratio is to prevent the failure of the component with less reinforcement, and the failure of less reinforcement is brittle failure, which should be avoided during design. 7 meters span beam height 7000 12=, beam is 50 a modulus, so beam height should be 600mm.

The beam width is 250mm, and the beam size is determined to be 250x600. The beam reinforcement must provide the bending moment and shear force at the beam end, and the reinforcement can be calculated by calculation. Reinforcement:

The reinforcement of houses in construction is generally represented graphically. According to the reinforcement diagram, determine the position, shape and type of reinforcement used in the building.

I am in the structural design of houses.

You're talking about a girder with a width of 240 and a height of 500, right?

Secondary steel, 6 16 steel bars are enough.

The upper part of the beam has 2 16s, the lower part of the beam puts 4 16s, and then puts stirrups 8@200.

5 meters long, 50-60 cm high, 3 20 roots, 2 18 roots, and two 16 roots in the middle.

Preparing to build a 5-storey building, how much mm does the steel bar need to go under the span of the first floor