1. When calculating the engineering quantities, it is necessary to classify them according to majors, and calculate the segment engineering quantities separately

For example: 1) In the electrical major, lighting, power, lightning protection grounding, telephone , TV, Internet, security, alarm, etc. are calculated and summarized by segments respectively;

2) In the water supply and drainage major, pump rooms, drainage, water supply, hot water, rainwater, pressure sewage, fire protection, etc. are calculated and summarized by segments respectively. Summary;

3) Note: Indoor fire hydrant projects must be classified separately because commissioning fees need to be recorded, and must not be mixed with water supply and drainage.

2. Pay attention to the items that are not reflected in the drawings.

1) Items that need to be listed separately such as: bracket manufacturing and installation, electrical adjustment test, motor wiring and debugging: supplement the main calculation Dry powder fire extinguishers, welding machines, etc. for material cost.

2) Items that do not need to be listed separately but should be calculated according to the work content such as: casing, disinfection and flushing, hydraulic test, rust removal and oil brushing, insulation, terminal wiring, wall slotting, Drilling holes, scattered earthwork, pipe encounters, etc.

3. Pay attention to the calculation of the need for bathroom hand dryers, toilet paper boxes, mirrors, soap dishes and other items in the repair and decoration project

4 .The engineering quantity calculation sheet must be filled out according to divisions, sub-items, classifications, layers or sections, and the super-elevation, pipe wells and insulation parts should be listed separately to facilitate the preparation of lists or quotas;

5 .When calculating the distribution box, write the terminals and cable heads in the box directly under the distribution box. It is convenient to calculate the number of terminals and additional engineering quantities when assembling the price (it is better to make a spreadsheet for automatic calculation)

6. When setting the bill of quantities, be careful not to omit the adjustment coefficient of the main structure and the debugging fees for fire hydrant pipes, super premium fees, high-rise addition fees, scaffolding erection and disassembly fees, and debugging fees for station projects, etc.

Electrical part:

1. When calculating piping, pay attention to the floor height to facilitate calculation of vertical pipeline length, and classify and calculate exposed wiring ducts and concealed wiring ducts according to specifications. Note: Exposed The set amount for piping along the wall already includes bracket laying, and the piping brackets in the ceiling need to be calculated separately.

2. When the electrical equipment distribution box is provided with the equipment, only the installation fee and debugging fee (such as frequency conversion control debugging) will be calculated ; /p>

4. When laying cables in pipe wells, pay attention to whether the electric well is a vertical channel. If the vertical bridge installed in the floor electric well is used to lay cables, use vertical channel cable laying.

The concept of hills and mountains in overhead lines under 5.10KV; hills are areas within 1KM with terrain undulations and height differences within 30~50m. Generally mountains refer to terrain within 250m with height differences within 30~50m. zone.

6. The engineering quantities that need to be calculated when setting the price of the bill of quantities:

Distribution box (terminal wiring in the box, floor-standing basic channel steel production and installation);

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Motor (motor check wiring, debugging) Note that motors equipped with complete sets of equipment are not debugged

Lightning protection grounding (high-rise aluminum doors and windows grounding, jumper, test, voltage equalizing ring, equipotential debugging etc.)

The busbar bridge (bridge accessories, bracket manufacturing and installation, plug-in box installation and debugging) does not require debugging for the plug-in busbar

Cables (protection tubes, cable heads, multiplication coefficients, Fire prevention measures, excavation, sand and brick laying)

Wiring (distinguish between types of pipes or bridge laying)

Water supply and drainage part:

1. Pipe list When setting the price, the matching waterproof casing is calculated according to the diameter of the pipe. Generally, the steel casing is calculated according to two sizes larger than the pipe body.

2. When calculating the engineering quantities of the water pump room, some drawings only indicate the location of the water pump without detailed drawings. It is necessary to refer to the standard atlas for calculation, and consider four shock absorbers and two pumps for each water pump. Connect the big and small heads, two soft joints, a check valve, two isolation valves, a drain valve, a pressure gauge and pump foundation grouting, etc.; the hot water pump has a thermometer, water processor; the sewage pump has a liquid level controller. If there is no water pump foundation in the civil engineering drawing, the steel support must be calculated.

3. When calculating heat exchangers or containers, we must consider supporting thermometers, pressure gauges, exhaust and drain valves, insulation, brackets, disinfection and flushing, and pressure tests. Among them, the thermometer must calculate supporting casings and pressure gauges. It is necessary to calculate the matching installation of the source accessories and the bending installation of the pressure gauge.

Hydrostatic test, water flushing, insulation, etc. of containers.

4. When calculating the pipeline engineering quantities, please note that the indoor pipelines already include bracket manufacturing, and the outdoor pipe brackets must be calculated separately. 5. Note that the quota for water supply plastic pipe sleeves is considered according to the outer diameter of De. The drawing design is generally as follows DN (engineering diameter) inside diameter.

Heating and ventilation part:

1. When calculating the air duct system, the length of various components (various regulating valves, mufflers, static pressure boxes, fans) needs to be deducted

2. The bracket of the air duct is included in the quota, but the rust removal and oiling of the bracket must be calculated. If the air duct is designed to be oiled, it must be calculated.

3. When calculating the fan coil unit, you need to consider the supporting 1 automatic exhaust valve, 2 control valves, 1 electric two-way valve, 1 filter, and a thermostat.

4. When calculating the air conditioning unit, consider the supporting 2 automatic exhaust valves, 2 pressure gauges and thermometers, 2 control valves, 1 electric regulating valve, 2 soft joints, 1 filter, and a thermometer. Controller, bracket system.

5. When calculating the cooling tower, consider 2 supply and return control valves, electric valves, water replenishment valves, drain valves, and float valves.

6. When installing a fan or air conditioning unit, attention should be paid to the fan shock absorber, canvas soft connection, equipment bracket manufacturing and rust removal and oiling.

7. The cabinet fan box is rated according to the centrifugal fan set.

8. For plate-type smoke exhaust vents, positive pressure air supply vents, and electric devices, fire damper installation items must be applied. If there is no manual operation, there must be a regulating valve installation project. (Note that such air outlets are generally combinations)

9. When the side length of a rectangular air duct is greater than (horizontal side length)》$2, guide vanes must be installed< /p>

10. The multi-unit air conditioner is suitable for the installation of one outdoor unit and multiple indoor units. The indoor units are installed with fan coil units (wall-mounted); the refrigerant using non-aqueous media needs to be installed according to actual conditions. Additional calculation is required.

11. Civil air defense closed casing: Type I closed casing: suitable for sampling pipes, pressure measuring pipes, compressed air pipes and iron air ducts poured directly into concrete walls, type II closed casing : Suitable for casings with iron air ducts that are not poured directly into concrete walls. Type III closed casings: casings with air ducts passing through brick walls. The quota does not include the cost of plugging holes, and the civil construction quota is implemented.

12. The installation of split air conditioners includes the installation of indoor units and outdoor units.

Municipal installation:

1. When calculating street lamps, attention should be paid to: excavation of lamp foundation, lamp foundation, lamp pole, lamp stand, light source, down conductor, terminal board, terminal Board wiring, grounding electrode, grounding span price and grounding electrode debugging

2. The height of the lamp is greater than 10 meters, the labor cost *1.4 coefficient, please note that the floor material is adjusted according to the current market price.

3. The installation of municipal pipelines and petroleum professional pipelines requires separate calculation of connecting pipe fittings, flanges, bolts, etc.

Self-examination procedures after the budget is completed 1. Budget book

1. Quantity, unit price and content of supplementary materials

2. System debugging fee for each volume

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3. Price adjustment coefficient for each book item 4. Increased fees for high-level and super-high fees. Main structure coefficient

5. Manual adjustment such as: Shaanxi (232 and 22 documents)

6. Increase in foreign material fees

7. Taxes in various places The charging rates are different.

2. Measure fees

1. Scaffolding demolition

2. Environmental protection fee

3. Fee schedule

1. Check that the fees are consistent with the bidding documents (remain consistent with civil engineering)

2. Pay attention to whether the fixed test fee is calculated and whether the pension insurance is deducted.

3. Whether loan interest will be deducted or quoted independently

IV. Reports

1. Preview of main material report

2. Comprehensive unit price Report preview (check the comprehensive unit price one by one)

3. Preview of the main material list

4. Sorting of the last sub-item

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