How to design the steel structure of the attic with a span of 4 2 and a length of 7 meters. 30

The section design needs to be done by a specialist.

H-shaped steel or cold-formed thin-walled steel are generally used for columns and beams, reinforced concrete cast-in-place foundations, prefabricated hollow slab floors and color steel lightweight roofs. Rigorous force calculations are required. The column and the beam are connected by bolts, which are generally pressure-bearing high-strength bolts.

To put it simply, if the bolt is too large or the steel beam is too small, the steel beam is easy to break; If the bolt is too small or the steel beam is too large, the bolt is easy to break. It's all going to have to be calculated.

The architectural design institute requires graduate students to graduate before entering, and I can't explain to you anything very clearly here after seven years of study.

In short, one cannot take it for granted. Honestly find a design institute to do the math for you.

A few hundred dollars will do it. Or students looking for graduate students in the direction of steel structure can also be counted.

Big brother, this is far more complicated than you think...

Planks are absolutely impossible ... Steel is not bigger or better, too big or too small is not safe.

If you want to ask, then add a question.,In addition, it is best to assess whether the lower floor of the building can stand it.。。

It's a bit like a corridor, but it's a whole two concepts. The main beam is made of H-shaped steel, it is not clear about your upper load, so it is difficult to estimate, and the support of the column is not explained, according to the hinged, lightweight exterior wall is estimated to be 450x200 H-shaped steel is OK, and the meter span is estimated to be 300 high steel beams. The steel structure has not been matched with the wood structure, and it is difficult to meet the fire prevention and anti-corrosion requirements.

More than 3 meters can not use No. 12 I-beam, the general ring beam is made of channel steel, the main beam I-beam, the attached beam with 50 angle steel The width between the beam and the beam is 610 times 610 times the grid frame, and the lap of the wooden board should not be suspended on the beam.

The attic with a span of 7 meters is made of No. 18 channel steel, and the other rooms are made of No. 14 channel steel, and our company specializes in construction.

It is recommended that you use H-shaped steel, this structure is too high. Pillars and sorghum should be stable. But this design is not economical.

Summary. Dear, hello, I am glad to answer for you, how big is the channel steel answer for the 6-meter span attic The channel steel attic span 6 meters can. No. 12 channel steel can be used, and the channel steel layout should be in the short-side direction, that is, the channel steel is 6 meters long and the angle iron is 6 meters in the direction.

Generally, the height of the I-beam is about 1 25 of the span, with Q235B, 27B I-beam. It is also recommended to use No. 12 channel steel, so that the load-bearing capacity will be better, and the channel steel layout should be in the short-side direction, that is, the channel steel is 6 meters long, and the angle iron is 6 meters in the direction.

6 meters long and 5 meters wide to build an attic with a large channel steel.

Dear, hello, I am very happy to answer for you, how big is the channel steel answer for the 6-meter span attic The channel steel attic span is 6 meters. No. 12 channel steel can be used, and the channel steel layout should be in the short-side direction, that is, the channel steel is 6 meters long and the angle iron is 6 meters in the direction. The general I-beam fiber carries the height of about 1 25 spans, with Q235B, 27B I-beams.

It is also recommended to use No. 12 channel steel, so that the load-bearing capacity will be better, and the layout of the channel steel should be in the short-side direction, that is, the channel steel is 6 meters long, and the angle iron is 6 meters in the direction.

How big is the channel steel used to build an attic with a length of 6 meters and a width of 5 meters?

The span of the channel steel attic is 6 meters. No. 12 channel steel can be used, and the channel steel layout should be in the short-side direction, that is, the channel steel is 6 meters long and the angle iron is 6 meters in the direction.

Or I-beams.

How big. Channel 12 models.

Is the height 12 cm?

Dear, it's a drop. 6 meters long and 5 meters wide, is 6 meters long or 5 meters long?

In construction, "long and vertical" is generally used in steel bars. If there is no special description for the bent steel bars identified in the centralized annotation of the remaining reinforcement bars, the calculation defaults to the layout of the reinforcement length.

Solution: First of all, use an I-beam to calculate. Check the cross-sectional modulus of No. 10 I-beam w=49m, unit length weight g=.

The mechanical design stipulates that for ordinary I-beams, the allowable bearing stress = 1400kg c. That is, a single I-beam can withstand the bending moment m=49 1400=68600kg-cm, while the bending moment produced by the self-weight of the I-beam m=, so a single I-beam can only withstand the bending moment m1=.

1. If it is a concentrated load p, a No. 10 I-beam bears 450kg (the middle of the meter can bear 450kg weight).

2. If it is a full paved load g, then a No. 10 I-beam bears the weight of the full paving within the meter length).

You now have a load of 4 tons, i.e. 4000kg, and you need No. 10 I-beams n = 4000 450 = 9 (intermediate load).

The unit of face load 350 provided by the landlord is 350kg m, and this beam is the middle beam (non-side beam) of the 6m bay. Section steel material Q235.

According to the title, the line live load on the beam is, the maximum bending moment in the span =, then the cross-sectional modulus of the section steel wx=m f=850500000 210=3955814 (mm) i.e. The cross-sectional modulus of the largest I-beam 63 C is only the largest I-beam H-beam HM600 300 12 20, and its cross-sectional modulus of 4020cm is barely satisfied. This is the stupidest and most uneconomical next step!

Therefore, the landlord should entrust the design of light steel structures, beams and columns with H-deformation high cross-section welded with steel plates. The landlord's mindset should be completely changed, that is not feasible.