What do the symbols in CAD architectural general drawings mean?

Different symbols have different meanings.

The meanings of all symbols and letters on the drawings:

1: Board B 2 Roof board WB 3 Hollow board KB 4 Grooved row board CB 5 Folded board ZB 6 Density rib Board MB 7 Stair board TB 8 Cover or trench cover GB 9 Weathering board or cornice board YB 10 Crane safety walkway board DB 11 Wall board QB 12 Gutter board TGB 13 Beam L 14 Roof beam WL 15 Crane beam DL 16 Monorail Crane DDL 17 Track connection DGL 18 Car stop CD 19 Ring beam QL 20 Lintel GL 21 Continuous beam LL 22 Foundation beam JL 23 Stair beam TL 24 Frame beam KL 25 Frame support beam KZL 26 Roof frame beam WKL 27 Purlin LT 28 Roof truss WJ 29 bracket TJ 30 skylight frame CJ 31 frame KJ 32 rigid frame GJ 33 bracket ZJ 34 column Z 35 frame column KZ 36 structural column GZ 37 cap CT 38 equipment foundation SJ 39 pile ZH 40 retaining wall DQ 41 trench DG 42 column Intermediate support DC 43 Vertical support ZC 44 Horizontal support SC 45 Ladder T 46 Awning YP 47 Balcony YT 48 Beam pad LD 49 Embedded parts M 50 Skylight end wall TD 51 Reinforced mesh W 52 Reinforced skeleton G 53 Foundation J 54 Hidden column AZ

How to read some symbols on the drawings

In the architectural design drawings, l means beam, ll means continuous beam, ql means ring beam, jl means foundation beam, and tl means It is a ladder beam, dl means a floor beam, z means a column, gz means a structural column, kz means a frame column, m means a door, and c means a window.

1. Formal architectural design must have the signature of the designer, the signature of the person in charge of the architectural drawings, the signature of the appraiser, the signature of the proofreader, and must be stamped with a seal and a registered professional seal.

2. In architectural design drawings, the length is generally expressed in mm, unless otherwise stated; when looking at the drawings, pay attention to combining the "Description of Building Materials" with other drawings. In the "Description of Construction Materials", if there is a "√" in front of each item, it indicates the method adopted in the design. What is not checked is not the approach adopted in the design.

3. For example, in the architectural design drawing: "c20 reinforced concrete jl (240400) with 4φ16 network φ6@200 hoops." This is interpreted as: the foundation beam of a reinforced concrete structure with a strength of c, 240mm wide, It is 400mm high, equipped with 4 main steel bars with threads of 16cm in diameter, and a rectangular ring of steel bars with a diameter of 6cm every 200mm. (The rectangular ring is approximately 340-350 mm long and 180mm-190mm wide).

4. For example, in the architectural design drawing: "C20 concrete small column (240240) with 4φ12 hoop] 6＠200." Among them, "]6＠200" is an irregular mark and should be "φ6 @200". Interpreted as: a small beam of reinforced concrete structure with a strength of C20, with a cross-section of 240mm long and 240mm wide, equipped with 4 main steel bars with 12mm diameter threads, and a rectangular network of 6cm diameter steel bars every 200mm apart. The height of the small column depends on the floor height marked on the project minus the height of the ring beam and then the thickness of the slab, because the ring beam and the slab are poured together.

5. As shown in the architectural design drawing: m5 cement mortar and mu10 shell ash sand bricks. "m5" represents the strength grade of cement mortar, and "mu10" represents the strength grade of shellfish sand bricks. mu10 represents the average compressive strength of shellfish sand bricks ≥10mpa.

6. ql means ring beam. The ring beam method is usually used in brick-concrete house building structures (hybrid structures), that is, the walls are built first, and then the ring beams and slabs are poured with reinforced concrete.

Architectural drawing symbols

1. Representation method of stirrups:

⑴ φ10@100/200(2) means the stirrups are φ10 and the spacing between dense areas is 100 , the spacing between non-encrypted areas is 200, and they are all double-limb hoops.

⑵ φ10@100/200(4) means that the stirrups are φ10, the spacing between dense areas is 100, and the spacing between non-densified areas is 200, all of which are limb hoops.

⑶ φ8@200(2) means the stirrups are φ8, the spacing is 200, and the stirrups are double leg hoops.

⑷ φ8@100(4)/150(2) means the stirrups are φ8, the spacing between dense areas is 100, four-limb hoops, and the spacing between non-densified areas is 150, two-limb hoops.

1. The method of expressing the main bars on the beam and the main bars on the bottom at the same time:

⑴ 3Φ22, 3Φ20 means that the upper steel bar is 3Φ22 and the lower steel bar is 3Φ20.

⑵ 2φ12, 3Φ18 means that the upper steel bar is 2φ12 and the lower steel bar is 3Φ18.

⑶ 4Φ25, 4Φ25 means that the upper steel bar is 4Φ25 and the lower steel bar is 4Φ25.

⑷ 3Φ25, 5Φ25 means that the upper steel bar is 3Φ25 and the lower steel bar is 5Φ25.

2. Representation method of the steel bars on the upper part of the beam: (marked on the upper support of the beam)

⑴ 2Φ20 means two Φ20 steel bars, arranged throughout the length, for double limb hoops.

⑵ 2Φ22+ (4Φ12) means 2Φ22 is the overall length, and 4φ12 is used for the six-limb hoop.

⑶ 6Φ25 4/2 means that the upper row of steel bars is 4Φ25 and the lower row is 2Φ25.

⑷ 2Φ22+ 2Φ22 means there is only one row of steel bars, two at the corners and two in the middle, evenly arranged.

3. Representation method of steel bars in the beam waist:

⑴ G2φ12 represents the structural steel bars on both sides of the beam, one φ12 on each side.

⑵ G4Φ14 represents the structural steel bars on both sides of the beam, two Φ14 on each side.

⑶ N2Φ22 represents the torsion steel bars on both sides of the beam, one Φ22 on each side.

⑷ N4Φ18 represents the torsion steel bars on both sides of the beam, two Φ18 bars on each side.

4. Representation method of the lower part of the beam: (marked on the lower part of the beam)

⑴ 4Φ25 means there is only one row of main bars, and 4Φ25 all extend into the support.

⑵ 6Φ25 2/4 means there are two rows of steel bars, the upper row of bars is 2Φ25 and the lower row of bars is 4Φ25.

⑶ 6Φ25 (-2)/4 means there are two rows of steel bars, the upper row of bars is 2Φ25, which does not extend into the support, and the lower row of bars is 4Φ25, which all extends into the support.

⑷ 2Φ25 + 3Φ22 (-3) / 5Φ25 means there are two rows of ribs, and the upper row of ribs is 5. 2Φ25 extends into the support, 3Φ22 does not extend into the support. The lower row of ribs is 5Φ25, arranged throughout the length.

5. Labeling examples:

KL7 (3) 300×700 Y500×250

φ10@100/200(2) 2Φ25

< p> N4Φ18

(-0.100)

4Φ25 6Φ25 4/2 6Φ25 4/2 6Φ25 4/2 4Φ25

□———————— ————□————————□——————————□

4Φ25 2Φ25 4Φ25

300×700

< p> N4φ10

KL7(3) 300×700 means frame beam 7, with three spans, cross-section width 300 and height 700.

Y500×250 means adding axillary under the beam, with width 500 and height 250.