Annotation of rebar explanation, rebar annotation 2 16 2 20 2 22?

JZL2(5)600*1000Y: foundation main beam, beam number 2, 5 spans, beam width 600, beam height 1000, with added axils.

10@200(4): stirrups 10 spacing 200, 4 limb hoops.

b4φ25;t2 18+4 16: 4 lower reinforcements 25; Upper reinforcement 2 18 + 4 16.

n4φ16;l 8@400: 4 side torsion steel bars 16, the spacing of the tension bar 8 is 400.

yφ20@250;8@300: Add the spacing of the axillary bottom reinforcement 20 to 250, and the spacing of stirrup 8 to 300.

Detailed explanation of the types of steel bars and marking symbols, increase knowledge!

Foundation beam 4 1 span 2 end cantilever cross-sectional width 800 height 1200 stirrup circle 8 spacing 200 4 limb hoops.

Bottom bar 4C22 Top bar 5C22

Beam lateral torsional reinforcement 6C18 3 on each side.

In-situ annotation 7C22 means that there are 7 reinforcements in the left support, 4 reinforcements, and usually 3 negative reinforcements.

4c25+3c22 3 22 and one 25 through, 2 25 negative ribs.

In fact, this situation is problematic, and it is a direct calculation of the software. The review of drawings will not pass.

Centralized annotation of beam: there is a straight line from the marked beam, which is used for the whole beam, and there are multiple rows of labeling, the first row is the beam number, the number of spans, the section size, the second row is the material specification, spacing, and the number of limbs of the beam stirrups, the third row is the upper main reinforcement and the lower main reinforcement of the beam, and the fourth row is the torsional tendon or structural reinforcement on the side of the beam. The yellow in the middle of the upper part of the figure is a centralized label.

In-situ annotation of beam reinforcement: only the number and specification of the standard reinforcement are used, and only the marked position (not the whole beam). White is the original designation.

Joy of life! Useful.

Rebar symbol. Generally, the method of leading out is adopted, and there are the following two annotation methods:

1. Mark the number of roots, diameters and grades of steel bars: 3 20, 3: indicate the number of roots of steel bars: indicate the diameter symbol of steel bar grades.

20: indicates the diameter of the rebar.

2. Mark the grade, diameter and center distance of adjacent steel bars.

8 @ 200, : Indicates the diameter of the rebar grade 8: Indicates the diameter of the rebar @: Equal center distance Symbol 200: The center spacing of adjacent rebar (200mm).

reinforcement annotation 2 16; 2 20 + 2 22 is a centralized annotation.

For the lower reinforcement, 2 20 + 2 22 is the lower length of each span of the steel bar, 2 2 20 and 2 22 are the length of the bar, and the steel bar marked in the concentration is the length of the through, not one-third. 2 20 + 2 22 is a row of bottom ribs, if it is two rows, it is 2 20 2 22.

For the upper rib to mark 2 16, 2 16 is to pass through the long upper rib, but in situ to mark 5 18, it is necessary to pass the upper rib through the long rib.

The one-third span of the support of 2 16 is replaced by 2 18.

Detailed explanation of the types of steel bars and marking symbols, increase knowledge!

The way the cap is marked is read from top to bottom:

CTJ01,1000 represents No. 01, a single-stage cross-section independent cushion cap, a single-stage cross-section is a flat plate, and the vertical cross-sectional size (height) is 1000mm;

7？25@130 3, indicatedEquilateralThree piles of capsTriangleLayoutsidesStressed reinforcementThe root HRB400 has a nominal diameter of 25, and the spacing between the 7 roots is 130mm.

The base elevation indicates that the base elevation is based on plus or minus zero.

Cap, No. 01, thickness 1000 mm.

Each of the three sides is equipped with 7 25 sticks (each 25 is 130 mm apart), a total of 21 25 sticks.

The details of the reinforcement annotation are as follows:First, the method of leading out is generally adopted, and there are the following two labeling methods:

1. Mark the number, diameter and grade of the reinforcement.

3: indicates the number of reinforcement roots.

Represents the rebar grade diameter symbol.

20: indicates the diameter of the rebar.

2. Mark the grade, diameter and center distance of adjacent steel bars.

Represents the rebar grade diameter symbol.

8: indicates the diameter of the rebar.

Equal center distance symbol.

200: The center distance of adjacent reinforcement (<200mm).

Second, the representation method of various types of steel bars:Beam stirrups: Beam stirrups include reinforcement level, diameter, spacing between infill and non-infill areas and the number of limbs.

The different spacing and the number of limbs between the stirrup infill area and the slash infill area need to be separated by a slash ""; When the beam stirrups are the same kind of spacing and the number of limbs, there is no need to use diagonal lines; When the number of stirrups in the encrypted area is the same as that in the non-encrypted area, the number of limbs is annotated once; The number of stirrup limbs should be written in parentheses.

For example: A10-100 200 (4), it means that the stirrups are grade I reinforcement, the diameter is O10, the spacing between the infill areas is 100, and the spacing of the non-infill areas is 200, all of which are limb hoops.

A8-100(4) 150(2), indicating that the stirrups are grade I reinforcement, the diameter is O8, the spacing of the infill area is 100, the limb hoops, the spacing of the non-infill area is 150, and the two limb hoops. The spacing is 100 for the limb hoops, and the spacing for the non-encrypted area is 150 for the two limb hoops. It should be noted that the spacing here is not represented by "@", but by "-".

Generally, the method of leading out is adopted, and there are the following two annotation methods:

1. Mark the number, diameter and grade of the reinforcement.

For example: 3 20.

3: indicates the number of reinforcement roots.

Represents the rebar grade diameter symbol.

20: indicates the diameter of the rebar.

2. Mark the grade, diameter and center distance of adjacent steel bars.

For example: 8 @ 200.

Represents the rebar grade diameter symbol.

8: indicates the diameter of the rebar.

Equal center distance symbol.

200: The center distance of adjacent reinforcement (<200mm).