In architectural design, L means beam, LL means continuous beam, QL means ring beam, JL means foundation beam, TL means ladder beam, DL means ground beam, Z means column, constructional column, frame column, M means door and C means window. QL "symbol, at first thought it was a wall beam.

1. Formal architectural design drawings shall be signed by the designer, project leader, approver and proofreader, stamped with the seal and registered with the practicing seal.

2. In architectural design drawings, the length is generally in mm, unless otherwise specified; Pay attention to the combination of "building material description" and other drawings when reading drawings. In the "Description of Building Materials", each item is marked with "√", which is the practice adopted in the design. What is not ticked is not the design practice.

3. As shown in the architectural design: "C20 reinforced concrete JL(240×400) with four φ 16 winding φ 6 @ 200 stirrups." The foundation beam of C20 reinforced concrete structure is 240mm wide and 400mm high, with four main bars with a thread diameter of16mm (16mm), and a circle of rebar with a diameter of 6mm is hoop every 200mm .. (The length of rectangular coil is about 340-350 mm, and the width is about180mm.

4. For example, in architectural design: "C20 concrete column (240×240) with four φ 12 hoops] 6 @ 200." Where "] 6 @ 200" is a nonstandard label and should be "φ 6 @ 200". It is interpreted as: a C20-strength small beam of reinforced concrete structure, with a section length of 240mm and a width of 240mm, is equipped with four main bars with a diameter of 12mm (12mm), and a rectangular steel mesh with a diameter of 6cm is hoop every 200mm. The height of the column depends on the height of the floor marked by the project minus the height of the ring beam and the thickness of the panel, because the ring beam and the panel are poured together.

5. For example, in the architectural design, M5 cement mortar is used to build MU 10 shell lime-sand brick. "M5" indicates the strength grade of cement mortar and "MU 10" indicates the strength grade of lime-sand brick. MU 10 represents the average compressive strength of lime-sand brick ≥ 10Mpa.

6.QL stands for ring beam and ring beam, which is usually used in brick-concrete building structure (mixed structure), that is, the wall is built first, and then the ring beam and plate surface are poured with reinforced concrete.

7, the practice of frame structure, namely pouring column, beam, beam, plate, etc. Dismantle the formwork and then build the wall.

8. According to the requirements of quality supervision, the contractor may be required to provide the certificates of reinforcement (each batch), cement (each batch), MU 10 lime-sand brick (each batch) and cement concrete test certificate.