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Do you know the nine key points of building structure design? 1. What should one look for in a geological report? Answer: 1. First, carefully read the evaluation of the site and the recommendations regarding foundation selection in the geological data, so as to get a general idea of the site’s conditions ； 2. Evaluate and understand the geological structure of the site, the distribution of soil layers, as well as the site’s stability and uniformity, based on the geological cross-sections and the physical properties of various soil layers ； 3. Determine the base form ； 4. Determine the foundation bearing stratum, foundation depth, soil layer data, etc., based on the basic form ； 5. Settlement data analysis ； 6. Have any adverse geological conditions that could affect the foundation been identified, such as soil caves, karst caves, weak soil, groundwater conditions, etc.? Note that geological reports on groundwater often contain the statement that \"no groundwater was observed during the investigation.\" If there is a basement and the site consists of impermeable layers such as rock, water pressure must be taken into account in the design. This is because once water enters the foundation pit and has nowhere to go, it can cause problems if this factor is not considered during the design process. 2. What is inspected during the acceptance of steel bars? Answer: 1 Reinforcement anchorage ； 2 Number and diameter of rebar ； 3 Spacing of reinforcing bars ； 4 Reinforcement cover ； 5 Stirrup hooks ； 6 Reinforcement for post-cast strips ； 7 Rachel’s sinews ； 8 Lap length of steel bars and joint rate ； 9 Reinforcement bar joint areas ； 10 Steel bar certificates of conformity and test reports. 3. What exactly should be checked during trench inspection? Answer: Trench inspection is carried out to generally determine the soil quality and any special conditions in the foundation trench, so as to decide on local measures for dealing with abnormal foundations ； It is necessary to determine whether additional drilling is required and whether the original foundation design needs to be revised, while also verifying the information received as well as the external conditions of the project. 1 Whether the foundation soil layers are those specified by the geological department at the design stage, and whether there are any differences – this is primarily the responsibility of the surveyors ； 2 Whether the foundation depth meets the designed depth, whether the bearing stratum is in place or if there is over-excavation, whether the dimensions of the foundation pit are correct, as well as the axis position and deviations and the dimensions of the foundation ； 3 Verify the geological report; in case of any discrepancies, resolve them through negotiation and modify the design plan ； 4 Is there water accumulation in the foundation pit, and has the soil layer at the base been disturbed? ； 5 Are there any other factors that affect the quality of foundation construction (such as whether the slope gradient of the foundation pit is appropriate, and whether there are any landslides)? 4. What is checked during the main structure acceptance? Answer: During the main structure acceptance, structural engineers primarily pay attention to the following aspects: 1. Whether the dimensions and positioning of beams, columns, and slabs meet the design requirements; what their formation quality is like; and whether there are any honeycombing or pitting defects. Also, check for any signs of repairs; if there are, inquire about the reason for the repairs and whether they have had an impact on the structure. 2. Whether the embedded components are installed accurately, whether the reinforcement bars are provided as required, whether the water passages for rainwater pipes are positioned correctly, whether the spaces for equipment such as those in bathrooms are arranged as specified, and whether the reinforcement bars for the subsequently installed cover plates are provided. 3. Check whether the mortar in the masonry work is sufficient in quantity and has adequate strength (it can be tested by trying to pull it with the hand); examine how well the masonry is laid out, whether it is straight, and whether the wall surface is smooth. Whether construction joints are provided in the structural columns within the masonry; whether the masonry under the frame beams is compacted; and whether the ring beams are installed as required. Is the thickness of the mortar leveling layer on the wall too thick? Wait. 4. Check the settlement records during the construction of each layer to see if there are any excessive differences in settlement. What is the increase in settlement per layer, and what are the settlement differences between various observation points? If the discrepancy is too large, first increase the observation density. 5. Check the construction records, various material certificates, strength test reports of specimens, etc. 5. What are the main contents of the calculation sheet? Answer: I. Design basis 1. **Standards** to be implemented, ministerial standards, and local standards ； 2. Name of the computational analysis software used, and the development entity ； 3. Documents: geological survey reports, pile testing reports, dynamic testing reports, etc. II. Safety level of the structure ； Safety grades for concrete structures, steel structures, pile foundations, natural foundations, etc. III. Load Values 1. Values for the self-weight of walls: (1) Concrete walls; (2) Exterior enclosure walls; (3) Interior partition walls; (4) Equivalent loads for movable partitions. 2. Lateral pressures, buoyant forces from water, equivalent static loads for civil defense purposes, construction loads on the ground floor, and ground loads on retaining structures. IV. Calculation of floor (including basement) and roof loads (recommended format; values in parentheses are recommended values) 1. Ground floor floor: Dead load: (1) Concrete slab thickness in mm, standard value of self-weight in kN, partial coefficient. (2) Thickness of surface layer in mm, standard value of self-weight in kN, partial coefficient. (3) Underlayment or ceiling: standard value of (1) kN/m2, with a sub-item coefficient. (Including the weight of suspended lighting fixtures and ductwork) Total static load; Standard value: (kN)/m2. Dynamic load: Standard value for construction dynamic loads: () kN/m2, with a partial coefficient. 2. Floor load calculation: Specify separately for each standard load floor. General floor slabs: Dead load: (1) Thickness of concrete slab: mm; standard value of self-weight: kN/m²; partial safety factor. (2) Thickness of surface layer in mm, standard value of self-weight in kN/m2, partial coefficient. (3) Underlayment or ceiling: standard value is kN/m2, with a sub-item coefficient. Subtotal kN/m2 Live load: (1) Standard value of live load kN/m2, partial factor. (2) Equivalent partitioning kN/m2, partial coefficient. Special floors: List separately those with high live loads such as machine rooms, storage areas, and warehouses. (3) Calculation for partition walls: q = kN/m2, hioxqi = kN/m × hio (net height). For roofs that are not intended for pedestrian use: Dead load: (1) Waterproofing layer, standard value in kg/m2, with a partial coefficient; (2) Insulation layer, standard value in kN/m2, with a partial coefficient; (3) Leveling and air-barrier layer, standard value in kN/m2, with a partial coefficient; (4) Weight of the roof panel with a thickness of mm, standard value in kN/m2, with a partial coefficient. Total dead load: kN/m2. Live load for maintenance purposes: standard value of 0.7 kN/m2, with a partial coefficient. Note: For roofs that are not intended for pedestrian use, the recommended standard value for the live load on flat roofs is 1.0 kN/m2, while it is 0.5 kN/m2 for sloped roofs. Technical exchange QQ group: 677426585. Roof loading: Dead load: Finish layer, standard value in kN/m2, partial coefficient. Rigid surface layer (50 mm thick), standard value kN/m2, sub-item coefficient. Leveling layer, standard value in kN/m2, partial safety factor. Waterproofing layer, standard value kN/m2, sub-item coefficient. Insulation layer, standard value in kN/m2, partial safety factor. Leveling layer, air barrier: standard value in kN/m2, sub-item coefficient. Roof panel self-weight, standard value in kN/m2, sub-item coefficient. Ceiling or underlayment, standard value in kN/m2, sub-item coefficient. Total: kN/m2. Calculation of stair loads: Static load for stair No.: (1) Standard value of floor slab self-weight, partial coefficient. (2) Standard value of the self-weight of the facing, sub-item coefficient. (3) The standard value of the self-weight of the base powder is 0.5 kN/m2. Total: kN/m2