【Daily Question 20090211】What are the key aspects of drawing review?

The drawing review process we follow is merely a formality; sometimes we don’t even notify the designers to attend such reviews. However, when it comes to subsequent improvements to the drawings, we do understand the purpose of these reviews: after the designers submit the drawings, units such as the process department, project team, and workshops conduct an examination of those drawings, after which they discuss any issues identified. These issues mainly include omissions in the control parameters required for the manufacturing process, including those related to instruments and motors. 2. Whether the process control scheme is feasible, and if there are any unreasonable aspects in the control system. 3. Check whether the submitted materials, including cables, instruments, cable trays, and auxiliary materials, are complete and free of any omissions. Wait, it’s mainly to oversee the design!

Key points and contents of drawing review: 1. Principles of drawing review: Drawing review should adhere to the basic principles of addressing larger items first and smaller ones later, as well as focusing on key aspects before dealing with the more general ones. That is, it is always carried out with the objectives of reducing construction difficulties, improving our company’s economic benefits, lowering production costs, enhancing production efficiency, ensuring project quality, guaranteeing construction safety, and accelerating the construction progress, and finally, errors in the drawings are corrected. 2. Key points for drawing review: (1) Whether the construction drawings have been officially signed by a qualified design firm and whether they have passed evaluation by the relevant authorities ； (II) Whether the scope of the contract is in line with the drawings, and whether the drawings within the scope of the contract are complete. (III) The construction is difficult; the difficulty can be reduced through design and modifications, which helps to ensure construction quality. (IV) Whether the drawings can be modified from an economic perspective, provided that the design functions are met. (5) Eliminate or modify some complex nodes, as well as decorative lines, corners, arcs, etc. that require a lot of manual labor, in order to reduce production costs and improve efficiency. (VI) Are there any issues with the building and structural design that make construction impossible, or that increase the difficulty of construction and may lead to problems related to quality, safety, or higher costs? (7) Can the key processes be optimized through design to accelerate project progress and reduce costs? (8) Whether the positions or distances between the process pipelines, electrical circuits, transportation roads surrounding the construction site and the buildings are reasonable ； Is the location of the proposed building reasonable? (IX) Are there any special requirements in the construction drawings? Can the available construction equipment meet the design specifications? If unconventional construction techniques are required, are there any technical difficulties, and can construction safety be ensured? (10) Whether special or new materials have been used, and whether the source and supply of such materials in terms of variety, specifications, quantity, etc., can meet the requirements. (11) Are there any cases of |ExamBig| violating mandatory provisions? 3. General contents of drawing review: (1) Issues related to non-standard representation that may lead to misunderstandings and require further clarification. (II) Whether the construction methods are specific and consistent with construction quality acceptance standards and regulations. (III) Whether the geological exploration data are complete. (IV) Are the construction drawings and specifications complete? (5) In the case of designs developed jointly by several units, or by different departments of the same design unit, whether there are any contradictions among them ； Check for any contradictions between different specialties, as well as between the plan, elevation, and sectional views, and ensure that the elevations are consistent. (VI) Whether the geometric dimensions, planar positions, and elevations in the general layout plan and the construction drawings are consistent. (7) Whether the building’s energy efficiency and fire safety requirements are met. (8) Whether there are any errors or contradictions in the building structure and the various specialized drawings; whether the presentation methods in the architectural drawings and structural drawings are clear and comply with drawing standards; and whether the design requirements for the anchorage length of rebar meet the specifications for its seismic resistance grade, among other things. (IX) Whether the foundation treatment method is reasonable. (10) Does the company possess the various drawing sets and standards listed in the construction drawings? ； If not, how to obtain it. This post was last edited by Xuehua on 2009-2-11 08:39.]

The review of drawings should adhere to the basic principle of addressing larger items first and smaller ones later, as well as focusing on key aspects before dealing with the more general ones. That is, it is always carried out with the objectives of reducing construction difficulties, improving our company’s economic benefits, lowering production costs, enhancing production efficiency, ensuring project quality, guaranteeing construction safety, and accelerating the construction progress, and finally, errors in the drawings are corrected. Key points of drawing review: (1) Whether the construction drawings have been officially signed by a qualified design firm and whether they have passed evaluation by the relevant authorities ； (II) Whether the scope of the contract is in line with the drawings, and whether the drawings within the scope of the contract are complete. (III) The construction is difficult; the difficulty can be reduced through design and modifications, which helps to ensure construction quality. (IV) Whether the drawings can be modified from an economic perspective, provided that the design functions are met. (5) Eliminate or modify some complex nodes, as well as decorative lines, corners, arcs, etc. that require a lot of manual labor, in order to reduce production costs and improve efficiency. (VI) Are there any issues with the building and structural design that make construction impossible, or that increase the difficulty of construction and may lead to problems related to quality, safety, or higher costs? (7) Can the key processes be optimized through design to accelerate project progress and reduce costs? (8) Whether the positions or distances between the process pipelines, electrical circuits, transportation roads surrounding the construction site and the buildings are reasonable ； Is the location of the proposed building reasonable? (IX) Are there any special requirements in the construction drawings? Can the available construction equipment meet the design specifications? If unconventional construction techniques are required, are there any technical difficulties, and can construction safety be ensured? (10) Whether special or new materials have been used, and whether the source and supply of such materials in terms of variety, specifications, quantity, etc., can meet the requirements. (11) Whether there are any violations of mandatory provisions.

1. Compliance with standard regulations； 2. Rationality of the structure ； 3. Manufacturing process performance. This post was last edited by wuqitao0000 on 2009-2-11 08:45.]

The work of reviewing construction drawings should first involve becoming familiar with the various types of drawings, such as architectural floor plans, elevations, sections, detailed drawings, structural construction drawings, and equipment diagrams. 1. The common issues identified through the joint review of the drawings are summarized as follows ； a Are the dimensions and elevations consistent? ； b Are there any contradictions among the professional drawings related to water, electricity, and equipment installation, as well as between the different drawing numbers? ； c Are the reserved holes and embedded components correct and complete? ； Is the construction method clearly explained? ； Is the selection of materials appropriate, and does the design meet quality requirements? ； Do the foundation, trenches, etc. touch each other? ； Are the building plans consistent with the structural drawings? ； Are the H-standard diagrams and detailed drawings correct? ； Are the finishing methods for the ceiling, walls, baseboards, skirtings, floor, etc. coordinated? ； Whether the dimensions, specifications, and quantities of the doors, windows, and components are consistent, etc. 2. Methods and key points for familiarizing oneself with drawings: Start with the overall view and then move on to details. That means first looking at the plan, elevation, and sectional views to gain an overall understanding of the project, as well as a rough idea of its total length and width, axis dimensions, elevations, floor heights, and overall height. Then examine the detailed construction methods and verify the overall dimensions against the detailed dimensions. 3. The following issues should be examined during the drawing review: (1) Architectural part: Whether there are any ambiguities or insufficient basis regarding the location of the building(s) on the overall building plan, and whether there are any discrepancies between the planned layout of the building(s) and the actual conditions on site. (2) From small to large: First, examine the sample drawings, and then the full-scale drawings, to verify whether the detailed construction methods indicated in the plan, elevation, and sectional views match those shown in the full-scale drawings ； The numbers, types, and models of the standard component catalogs used are consistent with those specified in the design drawings ； Are there any missing index symbols? ； Whether the sample drawings are complete, etc. (3) Build first, then structure: That is, look at the architectural drawings first, and then the structural drawings ； Compare the architectural drawings with the structural drawings to verify whether the axis dimensions and elevations match, to check for any discrepancies, as well as to ensure that no dimensions are missing and that there are no unreasonable design elements. (4) General first, then special: First, consider the general areas and requirements, and then those of the special areas. Special areas generally include foundation treatment methods, the installation of expansion joints, waterproofing requirements, as well as technical requirements for seismic resistance, fire protection, insulation, heat insulation, soundproofing, dust prevention, and special finishing. (5) Integration of drawings and specifications: When examining the drawings, it is necessary to refer to the general design specifications as well as the detailed notes provided in the drawings, in order to check for any contradictions between them. This includes verifying whether the specifications are clear, whether the requirements are feasible, and whether the proposed methods are reasonable. (6) Integration of civil engineering and installation: When reviewing civil engineering drawings, it is necessary to consult relevant installation drawings as well, and check for any inconsistencies between those drawings related to civil engineering. It is important to ensure that the positions and dimensions of embedded parts and pre-made holes and slots are consistent, and to understand the requirements of installation work with regard to civil engineering, so as to address issues related to coordination during construction. (7) Combine drawing requirements with actual conditions: This involves checking whether there are any aspects in the drawings that are not practical, such as the relative positions of buildings, the elevation of the site, and geological conditions, to ensure they match those specified in the design drawings ； It depends on whether construction companies can implement some special construction techniques. To ensure effective review of design drawings and improve their quality, it is necessary to minimize the number of issues identified in the designs during the construction process. 4. Points to note in the work: (1) The construction party should attend the drawing review meetings with an attitude of humility, cooperation, eagerness to learn, and harmony. Provide necessary services based on the organizational and coordination capabilities of the construction entity, design firm, and supervision company, to facilitate the completion of the drawing review. (2) The records of the drawing review are part of the construction documents and have the same validity as the construction drawings; therefore, the management methods and distribution scope for these records are the same as those for the construction drawings, and they must be implemented carefully.

Drawing review: (1) Whether it is design without a license or design beyond the authorized scope； Whether the drawings have been officially signed by the design unit. 　　(2) Are the geological exploration data complete? 　　(3) Are the design drawings and specifications complete, and is there a schedule for providing the drawings in phases? 　　(4) Whether the design seismic intensity meets local requirements. 　　(5) Are there any contradictions among the drawings designed jointly by several design firms? ； Are there any contradictions between the professional drawings, as well as between the plan, elevation, and sectional views? ； Check if there are any omissions in the markings. 　　(6) Whether the geometric dimensions, planar positions, and elevations in the general layout plan are consistent with those in the construction drawings. 　　(7) Whether fire prevention and firefighting requirements are met. 　　(8) Whether there are any errors or contradictions in the building structure and the various specialized drawings themselves ； Are the plan dimensions and elevations of the structural diagram consistent with those of the architectural drawing? ； Are the representation methods of architectural drawings and structural drawings clear? ； Does it meet the mapping standards? ； Is the embedded part clearly indicated? ； Is there a detailed list of rebar? ； Are the structural requirements for the rebar clearly indicated in the diagram? 　　(9) Whether the construction unit has access to the various standard atlas listed in the construction drawings. 　　(10) Is there a guarantee regarding the source of the materials, and can they be replaced? ； Can the conditions required in the figure be met? ； Are there any issues with the application of new materials and new technologies? 　　(11) Whether the foundation treatment methods are reasonable, and whether there are any technical issues in the building and structural design that make construction difficult or inconvenient, or that could lead to problems related to quality, safety, and increased project costs. 　　(12) Check whether there are any conflicts between the process pipelines, electrical circuits, equipment installations, transportation routes, and buildings, or among them, and whether the layout is reasonable. 　　(13) Are construction safety and environmental hygiene ensured? 　　(14) Do the drawings meet the requirements specified in the supervision outline?

(1) Does the engineering structure conform to the principle of economic rationality, and what are the reasonable suggestions for improvement? (2) Whether the construction unit has the necessary conditions to carry out the work in accordance with the requirements of the design drawings ； Whether the conditions at the construction site meet the requirements of the design for construction purposes (special attention should be paid to the conditions at the construction sites of renovation and expansion projects). (3) Are the dimensions and elevations of all parts in the drawings consistent and accurate? (4) Are there any conflicts between the architecture, structure, utilities, pipelines, and installation? (5) Whether the routing of various industrial pipelines is reasonable, and whether there are any conflicts with above-ground buildings and underground structures. Precautions for drawing review: (1) During the review, the construction unit should assign someone to keep records of the review. (2) During the joint review, the questions and suggestions raised shall be addressed and answered by the design unit. After organizing them, a drawing review record form in five copies shall be filled out; once it is signed by the responsible persons of the design, construction, supervision, construction units, and other parties involved in the review, the construction unit may proceed with the construction work based on this form. (3) The record of the drawing review shall include the review date, the organizing unit, the participating units, and the attendees, and should be included in the engineering technical archives. The format of the drawing review record form is shown in the table below. Drawing review (or) review record Date: Year Month Day Page No. Project name Owner Major issues (or) solutions Proposed by the owner Signature of the construction contractor Signature of the design firm Signature of the supervision agency Signature of other parties

1. Are there any contradictions or unclear intentions in the architectural and structural descriptions? 2. Do the axis positions in the architectural and structural drawings match, and are the relative dimensions clearly indicated? 3. In the case of a frame structure, check whether the dimensions of beams and columns in the architectural and structural drawings are consistent; for masonry structures, verify that the wall thicknesses and the layout of structural columns are consistent. 4. Confirm whether the elevations after pile positioning differ from those shown in the drawings. 5. Does the list of architectural decorations include all rooms? 6. Check whether the specifications for doors and windows are clear; if there are relevant diagrams, follow those, and if not, are there detailed drawings showing the opening direction, glass type, frame material, etc.? 7. Common oversights in design include the construction method for window sills, curtain boxes, the materials used for doors and windows, and the dimensions of door jambs. 8. Check whether there are any contradictions or discrepancies between the structural drawings and the relevant standards; if so, discuss which standard should be followed for construction. 9. From a construction perspective, identify any structural elements that may present difficulties in construction or even make construction impossible, such as those found in sloped roofs. 10. If you have a good understanding of the design, check whether the indoor pipelines interfere with each other, especially those related to outdoor installations. Problems often arise at the points where curved surfaces meet flat surfaces, as well as when beams intersect. 10. Are the height and number of staircase steps in line with the designated elevations? 11. Do the structural elevations shown in the building elevation drawings correspond to those of each floor as indicated in the structural drawings? 12. Care should be taken as errors can easily occur regarding the elevations at the eaves. 13. Do the dimensions and numbers of door and window openings in the building plan match those listed in the door and window schedule?

Guidelines for reviewing drawings: First, read the design drawing instructions. 1. Check whether the process flow is correct； 2. Check the structural dimensions of the equipment and whether the positions of all openings are correct ； 3. Are the process pipelines and valves compatible with each other, and do they meet the required pressure levels and specifications? ； 4. Do the conveying equipment meet the requirements, and is the motor selection appropriate? ； 5. Are the pressures of the stationary equipment and pressure vessels meeting the requirements? ； 6. From a safety perspective, are the safety facilities up to standard? ； 7. Compare with the material plan table to check whether each material plan is correct ； 8. The drawings that need to be reviewed include process flow diagrams, equipment diagrams, and process piping diagrams ；

(1) Are the drawings and instructions complete, clear, and explicit, with no contradictions?； (2) Are the construction drawings consistent with the design of the equipment and foundations? ； (3) Whether the main design and construction technical solutions are appropriate and in line with the actual conditions at the construction site ； (4) Can the level of detail in the drawings meet the construction requirements? ； (5) Is there coordination among the designs of various specialties? ； Such as the external dimensions of the equipment and those of the foundation, the holes and embedded components provided in the building in accordance with the installation drawings, the connection points between the equipment and systems, and the relationships between various pipelines. (6) The technical feasibility and necessity of implementing the new structures, materials, equipment, processes, and technologies adopted in the design, as well as any difficulties related to construction techniques, machinery, and supply of materials

The key points of the drawing review are: (1) whether the drawings and specifications are complete, clear, and explicit, as well as whether there are any contradictions； (2) Are the construction drawings consistent with the design of the equipment and foundations? ； (3) Whether the main design and construction technical solutions are appropriate and in line with the actual conditions at the construction site ； (4) Can the level of detail in the drawings meet the construction requirements? ； (5) Is there coordination among the designs of various specialties? ； Such as the external dimensions of the equipment and those of the foundation, the holes and embedded components provided in the building in accordance with the installation drawings, the connection points between the equipment and systems, and the relationships between various pipelines. (6) The technical feasibility and necessity of implementing the new structures, materials, equipment, processes, and technologies adopted in the design, as well as any difficulties related to construction techniques, machinery, and supply of materials

Let me talk about some specific examples. 1. In the field of architecture, it mainly concerns the conditions in control rooms, such as ceilings and floors. Holes and embedments in the wall. 2. Structural engineering: mainly involves embedding components, creating openings, and providing support. 3. Piping discipline: Installation methods of instruments, pressure ratings, etc. 4. Equipment discipline: Installation methods of instruments on equipment, pressure ratings, etc. 5. Electrical discipline: Trusses, grounding, power supply, UPS, lighting, etc

Before starting the project, it is necessary to understand and review the drawings, followed by a drawing review meeting. The procedures for reading and reviewing drawings are as follows: understand the function of the project to be constructed; familiarize oneself with and review the horizontal dimensions of the project; familiarize oneself with and review the vertical dimensions of the project; check for any errors in the parts of the construction drawings that are prone to mistakes; identify areas that could be improved. Taking civil engineering drawings as an example: First, understand the function of the project to be constructed. Once the drawings are received, it is necessary to determine what the purpose of this project is – whether it is a workshop or an office building Is it a mall or a dormitory? After understanding the functions, consider some basic dimensions and decoration details; for example, toilet floors are usually covered with tiles, and wall aprons made of solid materials are used. The floor levels in toilets and balconies are generally a few centimeters lower ； The size of the workshop must meet the requirements of production, especially those related to equipment installation and similar needs. Finally, read the building specifications to become familiar with the project’s renovation details. II. Familiarize with and review the plan dimensions of the project. Construction plans for buildings generally include three sets of dimensions: the first set consists of detailed dimensions, the second set refers to the dimensions between axes, and the third set is the overall dimensions. Check whether the sum of the dimensions in the first set is equal to the second dimension, and whether the sum of the dimensions in the second set is equal to the third dimension; also pay attention to whether the edge axis corresponds to the center line of the wall – in Guangdong Province, it is customary for the edge axis to be the outer edge line of the exterior wall. To read the dimensions on engineering floor plans, start by examining the building layout plan, then the layout plan for that specific floor, and finally the plans related to water, electricity, and air conditioning installations, as well as equipment specifications and the plans for the second round of renovations. Check to ensure that all these plans are consistent with each other. After becoming familiar with the plan dimensions of this floor, check whether it meets the usage requirements, such as verifying whether the room layout is convenient for use and whether there is adequate lighting and ventilation. When reading the dimensions of the next floor plan, check for any discrepancies with the upper floor. III. Familiarize with and review the vertical dimensions of the project. Construction drawings for building projects typically include front elevation views, sectional elevation views, and stair section views, which contain information on the vertical dimensions of the structure ； The floor plans of the building structure and the structural layout plans usually also indicate the elevation of that floor ； In the beam table, there is usually the elevation of the beam surface indicated ； Basic detail drawings and other detailed drawings generally also indicate the elevations. Through these construction drawings, the vertical dimensions of the project can be determined. An elevation view typically shows three sets of dimensions: the first set includes detailed measurements such as the height of window sills and doors and windows; the second set shows the floor height along with the corresponding elevation level; and the third set indicates the total height. The inspection method is the same as that for checking the dimensions of each plane: whether the sum of the dimensions of the first set is equal to the sum of the dimensions of the second set, and whether the sum of the dimensions of the second set is equal to the sum of the dimensions of the third set. Check whether the elevations of each floor in the elevation view are the same as those in the construction plan, and then verify whether the elevations in the construction plan correspond to those in the structural plan. The floor elevations in the construction drawings should not be exactly the same as those in the structural drawings for the corresponding floors. This is because the floor elevations in the construction drawings represent the elevations after the project is completed, whereas the floor elevations in the structural drawings refer only to the structural levels and do not include the height of the finishing layers. Thus, the elevations in the construction drawings for the same floor should be a few centimeters higher than those in the structural drawings. Special attention must be paid to this, as in some construction drawings, the dimensions of the building elements are indicated at higher values on the corresponding structural drawings; if not noticed, errors can occur during construction. After becoming familiar with the elevation view, the main thing to check is whether the top elevation of doors and windows matches the bottom elevation of the beams on the floor above ； Check whether there are any errors in the horizontal dimensions and elevations of the staircase treads, and verify that the vertical clearance under the ladder beam is greater than 2.1 meters, as well as whether there is any interference ； When a terrace appears in the intermediate layer, check whether the elevation of the terrace is lower than that inside the building ； Check whether the floor of the toilet and bathroom is a few centimeters lower; if not, check for any overflow prevention measures ； Finally, in combination with the installation of water, electricity, and air conditioning systems, the equipment specifications, and the construction drawings for the second round of renovations, it is necessary to check whether the building height meets the functional requirements. IV. Check for errors in areas of the construction drawings where mistakes are likely to occur. After becoming familiar with the dimensions of the building project, examine those parts of the drawings where errors are likely to arise. The main points to check are as follows: 1. Check whether the slope of the concrete cap on the parapet faces inward. 2. Check whether there is a beam under the brick wall. 3. Are the reinforcement details of the beams in the structural plan fully indicated in the beam table? 4. Check whether the height of the main beam is lower than that of the secondary beam. 5. When the spans of beams, slabs, and columns are the same or similar, check whether there are any areas with significant differences in reinforcement; if so, perform verification calculations. 6. When beams and shear walls are arranged on the same straight line, check whether the width of any beam exceeds the thickness of the wall. 7. When the beam is supported by both a shear wall and a column, check whether the beam’s centerline is parallel to or coincides with the axis; also verify whether the beam’s width extends outside the wall or column. If so, it should be submitted to the designer for handling. 8. Check whether the minimum spacing between the stress-bearing rebars in the beams meets the requirements of the construction acceptance specifications. When ribbed deformed steel bars are used in the project, since workers bend them using the ribless side during processing, the diameter of such rebars should be taken as the original diameter plus approximately 21 mm corresponding to the thickness of the ribs. 9. Check other details. 10. Determine whether there are any differences between the design requirements and the construction acceptance specifications. As often stated in column tables: if there are fewer than 4 rebar bars on each side, they can be lapped within the same cross-section. However, the construction acceptance specifications require that the overlapping area of rebar in the same cross-section shall not exceed 50%. 11. Check for any contradictions between the structural description, the structural plans, the details, and the tables of beams and columns, as well as with the construction specifications. 12. The independent foundation is subjected to forces in two directions; the reinforcement bars acting along the short side are generally placed above those acting along the long side. Check the foundation detail drawings to ensure that the placement of the reinforcement bars is correct. V. Review the original construction drawings for areas that can be improved. Suggestions for improvements to the original drawings are made primarily with regard to facilitating the construction of the project, ensuring building quality, and enhancing the aesthetic appearance of the structure. 1. Propose suggestions for improving the construction drawings from the perspective of facilitating construction work. ① In the structural plan, there may be cases where consecutive frame beams have large spans between them; when the negative moment reinforcement at the intermediate supports is anchored separately, it results in too many rebar elements at the beam-column joints, making it difficult to pour concrete. It is advisable to suggest to the designers that the negative reinforcement should be connected wherever possible. ②When the negative reinforcement in the supports runs throughout the length of the beam, it results in too dense reinforcement on the beam surface in beams with small spans, making it difficult to pour concrete. It is recommended that, while ensuring the presence of negative reinforcement in the beams, the width of each span be kept as consistent as possible, with only the beam height being adjusted, in order to facilitate the connection of the reinforcement and the pouring of concrete. ③When the structural design is complex and it is difficult to complete the construction of a certain part in one go, a request is made to the designer regarding how to create concrete construction joints. ④After the elevation of the terrace surface is lowered, if there is a beam in the middle of the terrace and this beam connects to the interior area, it is necessary to determine whether the reinforcement bars of the beam should be bent at the lowered section or anchored separately; the design must address this issue. 2. Propose suggestions for modifying the construction drawings from the perspective of improving the quality of construction projects. ①When the ceiling plastering is designed to use the same 1:1:6 mixed mortar as the wall plastering, it is recommended to change the ceiling plastering to a 1:1:4 mixed mortar in order to improve adhesion. ② When the construction drawings do not specify waterproofing requirements for elevator shafts, bathroom sump pits, and fire water tanks, it is advisable to add a cement mortar waterproof layer to the outer walls of these pits and the inner walls of the sump tanks in order to improve the quality of waterproofing. 3. Suggestions for improving the construction drawings from the perspective of enhancing architectural aesthetics: ① When the parapet of a terrace meets an exterior window, check whether the height of the parapet is greater than that of the window sill; if so, the junction will not look aesthetically pleasing, and it is recommended to make design adjustments. ②Check whether the color separation lines on the exterior wall finish are connected; if not, it is recommended to seal them at the corners ； When there is no clear boundary between the exterior wall and the interior wall, consult the designer to determine where it is most aesthetically pleasing for the wall decoration to end on the interior wall, and whether the top and bottom surfaces of the protruding parts of the exterior wall should be decorated in the same way as the exterior wall itself. ③When the cross-sectional size of the columns gradually decreases as the floor level rises, and if the columns protrude from the exterior wall to serve as decorative elements on the facade, it is recommended not to reduce the cross-sectional size of those protruding sections in order to maintain consistent width from top to bottom. ④When columns are placed at the corners of brick walls in the building’s layout, and the angle between those brick walls is less than 90 degrees, if square columns are still used in the structural design, it is advisable to change them to polygonal columns based on the building’s layout, so as to prevent the column corners from protruding outside the wall and affecting usability and aesthetics. ⑤When there is a frame column on the left side of the elevator lobby (front room) that protrudes 10–20 cm beyond the wall surface, check whether the column on the right side protrudes by the same amount; if not, it is recommended to make it symmetrical on both sides. Following the procedure and approach of \"familiarizing oneself with the functions of the project to be constructed, familiarizing with and reviewing the plan dimensions of the project, familiarizing with and reviewing the elevation dimensions of the project, checking for any errors in the parts of the construction drawings that are prone to mistakes, and identifying areas that require improvement,\" the work of interpreting and reviewing drawings can be carried out in a systematic and comprehensive manner.

Key points of the drawing review: a. Whether the construction drawings are consistent with the requirements for equipment and special materials. 　　b. Whether the design drawings are compatible with the main construction technical solutions. 　　c. Whether the level of detail in the drawings meets the construction requirements. 　　d. Whether the component division and processing requirements are in line with the construction capabilities. 　　e. Check whether the connection between the new and old plants as well as the new and old systems in the expansion project is appropriate, and whether the construction transition is feasible; in addition to verifying the drawings, it is also necessary to go to the construction site to assess the actual conditions. 　　f. Whether the designs of different specialties are coordinated, such as the external dimensions of equipment versus the dimensions of the foundations, the holes and embedded components provided in the building in relation to the requirements specified in the installation drawings, the connection points between equipment and systems, and the relationships between various pipelines. 　　g. Are there any difficulties in construction techniques, as well as in the supply of machinery and materials, related to the new structures, materials, equipment, processes, and technologies adopted in the design? 　　h. Are there any contradictions between the construction drawings, between the general and detailed drawings, or between the overall and detailed dimensions? 　　i. Whether it can meet the requirements for safe and economical operation as well as the needs for proper maintenance work. 　　j. Whether the specifications, models, and quantities of materials and equipment listed on the construction drawings match those in the material list, and whether they are consistent with the actual conditions on site.

Contents of the drawing review: (1) Whether it is design without a license or design beyond the authorized scope； Whether the drawings have been officially signed by the design unit. 　　(2) Are the geological exploration data complete? 　　(3) Whether the design drawings and specifications meet local requirements. 　　(4) Whether the design seismic intensity meets local requirements. 　　(5) Are there any contradictions among the drawings designed jointly by several design firms? ； Are there any contradictions between the professional drawings, as well as between the plan, elevation, and sectional views? ； Check if there are any omissions in the markings. 　　(6) Whether the geometric dimensions, planar positions, and elevations in the general layout plan are consistent with those in the construction drawings. 　　(7) Are fire prevention and firefighting measures adequate? 　　(8) Whether there are any errors or contradictions in the building structure and the various specialized drawings themselves ； Are the plan dimensions and elevations of the structural diagram consistent with those of the architectural drawing? ； Are the representation methods of architectural drawings and structural drawings clear? ； Does it meet the mapping standards? ； Is the embedded part clearly indicated? ； Is there a detailed list of rebar, and are the structural requirements for the rebar clearly indicated in the drawings? 　　(9) Whether the construction unit has access to the various standard atlas listed in the construction drawings. 　　(10) Is there any guarantee regarding the source of the materials, and can they be replaced? ； Can the conditions required in the figure be met? ； Are there any issues with the application of new materials and new technologies? 　　(11) Whether the foundation treatment methods are reasonable, and whether there are any technical issues in the building and structural design that make construction difficult or inconvenient, or that could lead to problems related to quality, safety, and increased project costs. 　　(12) Check whether there are any conflicts between the process pipelines, electrical circuits, equipment installations, transportation routes, and buildings, or among them, and whether the layout is reasonable. 　　(13) Are construction safety and environmental hygiene ensured? 　　(14) Whether the drawings meet the requirements specified in the supervision outline.

1. Have the construction drawings been officially signed by a qualified design firm, and have they passed review by the relevant authorities? ； 2. The construction is difficult; design modifications can reduce this difficulty, making it easier to ensure quality. 3. Can the drawings be modified from an economic perspective, as long as the design functions are met? 4. Some complex nodes, or decorative lines, corners, arcs, etc. that require a lot of manual work, are removed or modified in order to reduce production costs and improve efficiency. 5. Are there any issues with the architectural and structural design that make construction impossible, or that increase the difficulty of construction and may lead to problems related to quality, safety, or higher costs? 6. Can key processes be optimized through design to accelerate project progress and reduce costs? 7. Are the positions or distances between the process pipelines, electrical circuits, transportation roads surrounding the construction site and the buildings reasonable? ； Is the location of the proposed building reasonable? 8. Are there any special requirements in the construction drawings? Can the available construction equipment meet the design specifications? If unconventional construction techniques are required, are there any technical difficulties, and can construction safety be ensured? 9. Whether special or new materials are used, and whether the source and supply of such materials in terms of variety, specifications, quantity, etc., can meet the requirements. 10. Is there any violation of mandatory provisions? 11. Whether the scope of work is in line with the drawings, and whether all the drawings required for the scope of work are available.

1. Definition of construction drawing review: Drawing review refers to the process in which the supervision unit responsible for supervision during the construction phase organizes the construction unit, as well as the project owner, suppliers of materials and equipment, etc., to thoroughly examine and review the construction drawings in detail after receiving the approved design documents, prior to the design briefing. 2. Purpose of the drawing review: First, to enable the construction unit and all other parties involved in the project to become familiar with the design drawings, understand the characteristics of the project and the intentions behind the design, identify the technical challenges that need to be addressed, and develop solutions for them ； Secondly, it is to address the issues present in the drawings, reduce errors in them, and nip potential quality problems in the bud. 3. Contents of the drawing review: (1) Whether the design was carried out without proper authorization or beyond the designated scope of authority ； Whether the drawings have been officially signed by the design unit. (2) Are the geological exploration data complete? (3) Whether the design drawings and specifications meet local requirements. (4) Whether the design seismic intensity meets local requirements. (5) Are there any contradictions among the drawings designed jointly by several design firms? ； Are there any contradictions between the professional drawings, as well as between the plan, elevation, and sectional views? ； Check if there are any omissions in the markings. (6) Whether the geometric dimensions, planar positions, and elevations in the general layout plan are consistent with those in the construction drawings. (7) Are fire prevention and firefighting measures adequate? (8) Whether there are any errors or contradictions in the building structure and the various specialized drawings themselves ； Are the plan dimensions and elevations of the structural diagram consistent with those of the architectural drawing? ； Are the representation methods of architectural drawings and structural drawings clear? ； Does it meet the mapping standards? ； Is the embedded part clearly indicated? ； Is there a detailed list of rebar, and are the structural requirements for the rebar clearly indicated in the drawings? (9) Whether the construction unit has access to the various standard atlas listed in the construction drawings. (10) Is there any guarantee regarding the source of the materials, and can they be replaced? ； Can the conditions required in the figure be met? ； Are there any issues with the application of new materials and new technologies? (11) Whether the foundation treatment methods are reasonable, and whether there are any nuclear-related issues in the building and structural design that make construction impossible or difficult, or that could lead to problems such as increased costs, safety risks, etc. (12) Check whether there are any conflicts between the process pipelines, electrical circuits, equipment installations, transportation routes, and buildings, or among them, and whether the layout is reasonable. (13) Are construction safety and environmental hygiene ensured? (14) Whether the drawings meet the requirements specified in the supervision outline. 4. Procedure for joint review: The joint review of drawings should be carried out before construction begins. If all the construction drawings are not available before work begins, a review of the drawings for individual sections can be carried out first. 5.1 General procedure for drawing review: The owner or supervisor gives an opening speech → the design party explains the drawings → representatives from the construction party and the supervisor ask questions → each item is discussed in detail → a record of the review is prepared → it becomes effective after signing and stamping. 5.2 A pre-review must be organized prior to the drawing review. The issues identified upon reviewing the images should be summarized, and one representative should speak on behalf of everyone at the meeting; the others may provide appropriate explanations or additions as necessary. 5.3 The designated personnel from the contractor and the designer shall keep records of the questions raised and those answered, for verification purposes. 5.4 Organize the results into a record of the drawing review, which shall be signed and sealed by representatives of all parties for approval. 6. Units participating in the drawing review: The supervision unit is responsible for organizing the drawing review, with the participation of the construction unit, the project owner, the design unit, etc. 7. Principles and key points for supervision engineers in reviewing construction drawings. 7.1 Main principles for the supervision engineer’s review of construction drawings (by the supervision agency): (1) Whether it meets the approval requirements set by relevant departments for the preliminary design. (2) Whether a comprehensive and reasonable optimization of the preliminary design was carried out. (3) Are safety and reliability guaranteed, as well as economic feasibility? Do they meet the requirements regarding the total project cost? (4) Does the design depth meet the requirements of the design phase? (5) Whether it meets the requirements for functional use and construction techniques. 7.2 Key points for the supervision engineer in reviewing construction drawings (1) Standardization of the drawings ； (2) Architectural functional design ； (3) Architectural form and facade design ； (4) Structural safety ； (5) Possibility of material substitution ； (6) Coordination among various specialties ； (7) Construction feasibility.

Drawing review: (1) Whether it is design without a license or design beyond the authorized scope； Whether the drawings have been officially signed by the design unit. 　　(2) Are the geological exploration data complete? 　　(3) Are the design drawings and specifications complete, and is there a schedule for providing the drawings in phases? 　　(4) Whether the design seismic intensity meets local requirements. 　　(5) Are there any contradictions among the drawings designed jointly by several design firms? ； Are there any contradictions between the professional drawings, as well as between the plan, elevation, and sectional views? ； Check if there are any omissions in the markings. 　　(6) Whether the geometric dimensions, planar positions, and elevations in the general layout plan are consistent with those in the construction drawings. 　　(7) Whether fire prevention and firefighting requirements are met. 　　(8) Whether there are any errors or contradictions in the building structure and the various specialized drawings themselves ； Are the plan dimensions and elevations of the structural diagram consistent with those of the architectural drawing? ； Are the representation methods of architectural drawings and structural drawings clear? ； Does it meet the mapping standards? ； Is the embedded part clearly indicated? ； Is there a detailed list of rebar? ； Are the structural requirements for the rebar clearly indicated in the diagram? 　　(9) Whether the construction unit has access to the various standard atlas listed in the construction drawings. 　　(10) Is there a guarantee regarding the source of the materials, and can they be replaced? ； Can the conditions required in the figure be met? ； Are there any issues with the application of new materials and new technologies? 　　(11) Whether the foundation treatment methods are reasonable, and whether there are any technical issues in the building and structural design that make construction difficult or inconvenient, or that could lead to problems related to quality, safety, and increased project costs. 　　(12) Check whether there are any conflicts between the process pipelines, electrical circuits, equipment installations, transportation routes, and buildings, or among them, and whether the layout is reasonable. 　　(13) Are construction safety and environmental hygiene ensured? 　　(14) Do the drawings meet the requirements specified in the supervision outline?