What does WLL mean in the flat dimension of a beam?

wkl1(1)300*500￠8◎100/200（2）2￠14；3￠14

Representation: roof frame beam 1, one span, section, width 300mm, height 500mm, stirrup first-class steel diameter 8mm, spacing encryption area of 100mm, non-encryption area of 200mm, two hoops, the upper length of the steel bar for the secondary steel 2 diameter 14mm, beam bottom reinforcement for the secondary steel 3 diameter 14mm.

1. There is also in-situ marking of each column edge 3 14

Representation: The upper steel bar has 3 secondary steels with a diameter of 14mm at the bearing. The two corner bars are long, and 3 are adjacent net span 1 3 cutting ribs, and the large value of the adjacent net span is taken, and the negative moment reinforcement.

2. There is also an in-situ annotation of each column edge 7 14 5 2

It is expressed as: the upper steel bar has 7 secondary steels with a diameter of 14mm at the bearing. Arranged in two rows, the first row of 5 steel bars, two corner bars are long, 3 are adjacent net span 1 3 cutting ribs, take the adjacent net span large value, and negative moment reinforcement.

The second row of 2 steel bars is the adjacent net span 1 4 cutting ribs, and the large value of the adjacent net span is taken, and the second row of negative moment steel bars.

Look at it against the Atlas of Flat Laws. Remember that it seems to be the code name of the roof connection beam.

6l9: the number of the beam;

1): 1 span;

200*350: beam cross-sectional size (width * height) 200mm*350mm

It seems to be a roof tie beam.

Look at some flat law diagrams or related textbooks, there should be explanations.

What has become of the anchorage length of the roof beams.

Introduction to rebar drawing.

First, stirrup representation method:

10@100 200(2) means that the stirrups are 10, the spacing between the infill areas is 100, and the spacing of the non-infill areas is 200. 10@100 200(4) means that the stirrups are 10, the spacing of the infill area is 100, and the spacing of the non-infill area is 200. 8@200(2) means stirrups are 8, spacing is 200, and both limb hoops.

8@100(4) 150(2) means stirrups are 8, the spacing between the infill areas is 100, the limb hoops, and the non-infill area spacing is 150, and the double limb hoops.

First, the main reinforcement on the beam and the main reinforcement under the beam are expressed at the same time

3 22, 3 20 means that the upper reinforcement is 3 22, and the lower reinforcement is 3 20. 2 12, 3 18 means that the upper reinforcement is 2 12, and the lower reinforcement is 3 18. 4 25, 4 25 means that the upper reinforcement is 4 25, and the lower reinforcement is 4 25.

3 25, 5 25 means that the upper reinforcement is 3 25, and the lower reinforcement is 5 25.

Second, the beam upper reinforcement representation method: (marked at the beam support).

2 20 represents two 20 steel bars, arranged in length, for double limb hoops. 2 22 + (4 12) means that 2 22 is the length of the whole length, and 4 12 erection ribs are used for hexa-limb hoops. 6 25 4 2 means that the upper row of reinforcement is 4 25 and the lower row is 2 25.

2 22+ 2 22 means that there is only one row of rebars, two at the corners and two in the middle, evenly arranged.

Third, the beam waist in the reinforcement representation method:

G2 12 represents the structural reinforcement on both sides of the beam, one 12 on each side. G4 14 represents the structural reinforcement on both sides of the beam, with two 14s on each side. N2 22 represents torsional reinforcement on both sides of the beam, one 22 on each side.

N4 18 represents torsional reinforcement on both sides of the beam, with two 18s on each side.

Fourth, the lower part of the beam reinforcement representation method: (marked in the lower part of the beam).

4 25 means that there is only one row of main reinforcements, and 4 25 all extend into the support. 6 25 2 4 means that there are two rows of reinforcement, the upper reinforcement is 2 25, and the lower reinforcement is 4 25.

6 25 (-2 ) 4 means that there are two rows of reinforcement, the upper reinforcement is 2 25, does not extend into the support, and the lower reinforcement 4 25, all extends into the support.

2 25 + 3 22(-3) 5 25 means that there are two rows of ribs, and the upper row of ribs is 5. 2 25 extends into the support, 3 22, does not extend into the support. Lower rib 5 25, arranged through length.

What does it mean that 4 25 4 2 2 is locally required to be 4 2 in beam reinforcement flat annotation?

Answer: 4 25 4 2 in beam reinforcement flat annotation. This is a beam in-situ callout.

I'm already wrong when I say it arbitrarily! I don't know if it's a mistake in the drawing? Or did you make a mistake?

Only if it is changed to: 6 25 4 4 2 means the previous row of longitudinal reinforcement 4 25 (according to what you said: "local need to be long", that is, the corner of 2 25 through length reinforcement, the middle 2 25 is non-penetrating reinforcement), the next row of longitudinal reinforcement 2 25, a total of 6 25 is established.

According to the above figure, there are 10 steel bars, arranged in three rows for 4 25, and the 3rd row is 2 20

Beam flat method annotation.

In parentheses.

With a minus signThe quantity is the number by which the lower longitudinal reinforcement of the beam support is reduced.

Screenshot 18 28 8 ( 8) 10, it means that the upper row of longitudinal bars is 8 28 and does not extend into the support, and the lower row of longitudinal bars is 10 28, all extend into the support. (The reinforcement symbol in the figure, the level of the people is limited, and it cannot be entered, so it can only be replaced by "", I hope you forgive me.) ）

Reference: 16G101-1 (replaces 11G101-1) Drawing rules and structural details of concrete structure construction drawings plan overall representation method (cast-in-place concrete frame, shear wall, beam, slab).

1, is the elevation, which means that the elevation of the beam is lower than the floor slab.

2.Represents the number and size of the upper and lower reinforcements of the beam.

Just take a look at the 03g or 11g rebar atlas.

B3 25 indicates the upper through-length reinforcement.

t3 22 indicates the lower reinforcement.

I'll say a few words, I don't know if it's right or not?

I'm also a supervisor, but not for long. As a supervisor, it's impossible to understand everything, especially when it comes to design. Each person has their own design methods and design intentions, and the design standards are not the same, and the writing is not clearly stipulated, some are marked in English, some are marked in Chinese, or the initials of Chinese pinyin are marked, so that we are difficult to do the supervision of the staff, and even do not know what to do, as you said.

I think; For what you don't understand, you can ask about design, and there is nothing embarrassing or "embarrassing" about it. If it wasn't mentioned in the drawing triage, you can ask again afterwards. "What is known is known, and what is not known is not known". "Shameless questioning" is a traditional virtue!

Variable section beam, beam width 600, beam height from 900 to 600.

Yes, it should be a variable cross-section, and the specific one still depends on the drawing.

n represents torsion ribs, g represents structural ribs, generally collectively referred to as waist ribs, the two can not be together, and the in-situ marking is preferred.

g is the structural reinforcement.

n is a torsional steel bar.

The meaning of the difference is: n is the torsional reinforcement and G is the structural reinforcement.

g is the structural reinforcement (waist bar),.

n is a torsional steel bar.

n stands for torsional resistance.

g stands for construction.

N is the torsion rib, G is the construction rib! 101 atlas has,It is recommended that you go to**buy a set.,It's now the 16th edition.,If you need it, you can send me a private message.,Or go to**search and see!