1
The first kind of quota subtitle coefficient
Mainly in the chapters and sections, the prescribed amount is stipulated. When the content of sub-project is not exactly the same as that of quota sub-project (Shi Ding's content and construction conditions), it is necessary to adjust the content of quota. For example:
Conversion coefficient of each volume quota (pipeline valve, flange, bracket, installation, multi-joint socket installation, etc.). ).
Superelevation coefficient (Volume II. For projects where the working object is 5m above the ground and less than10m, the quota shall be manually multiplied by 1.33 coefficient: volume XI. Super crop height is more than 6 meters above the ground).
2
Engineering coefficient of the second kind
Mainly refers to the coefficient directly related to the engineering form, which is stipulated in the quota chapter description of each volume, such as:
The increase coefficient of high-rise buildings; The main structure is a construction project in which steel formwork is poured on site. For internal and external pouring projects, the quota is artificially multiplied by the coefficient 1.05, and for internal pouring and external masonry projects, the quota is artificially multiplied by the coefficient 1.03.
three
Comprehensive coefficient of the third kind
It is a coefficient specified in each volume and has no direct relationship with the form of the project itself. For example, the coefficient of scaffolding erection and dismantling, and the coefficient of simultaneous increase of installation and production. The coefficient of increasing harmful environmental impact, etc.
The relationship between the coefficients is as follows: the first kind of quota subtitle coefficient constitutes the calculation basis of the second kind of engineering coefficient; The above two kinds of coefficients constitute the calculation basis of the third kind of comprehensive coefficient. The increase or decrease of the above coefficient constitutes the direct cost. Coefficients at the same level do not calculate each other.
Common coefficient items in installation project budget
1. superelevation coefficient
The ultra-high cost in the quota refers to the labor cost that needs to be increased because the height of the working object exceeds the calculation range of the quota subtitle.
The coefficient mainly appears in the unit valuation table of provincial installation projects: the second volume of projects with the height of the working object exceeding 5 meters; The eighth volume of the project where the height of the working object exceeds 3.6 meters; Book 9: works that operate objects over 6 meters; Volume XIII: Items with working objects over 6 meters in height.
The height of the working object refers to the vertical distance of the ground installation with floors, and the distance from the workplace without floors (or design plus or minus zero) to the working object.
The above expenses are only calculated for the ultra-high part of the project, and the non-ultra-high part is not counted.
2. Conversion coefficient of each volume chapter.
Chapters, notes and comprehensive explanations specify the adjustment factors of each item. For example:
Volume VIII: The artificial multiplication coefficient of the flange bracket of the pipeline valve in the pipeline room and the pipe gallery is 1.3.
Chapter 8 of Volume 2 shows that the copper-core power cable head is multiplied by the coefficient 1.2 according to the quota of the same section cable head, and the double-shielded cable head is manually multiplied by the coefficient 1.05.
Chapter 2 of the 1 1 book shows that the relevant parts of this quota are applicable to sporadic painting such as marking rings, and the artificial multiplication factor is 2.0.
3. Raise the charges for high-rise buildings
The increase fee of high-rise building refers to the increase of labor efficiency and mechanical shift fee for vertical transportation of materials and tools when the building is six stories or more than 20 meters; Shift fee of lifting equipment for workers to go up and down.
This fee is applicable to heating, ventilation, domestic gas, water supply and drainage, electric lighting and thermal insulation and painting attached to the above projects.
The height of a building refers to the vertical height from the outdoor horizon to the dripping eaves. Excluding the height of roof water tank room, stairs and parapet.
When calculating the increase cost of high-rise buildings, the labor cost of all projects should be taken as the calculation base, including basement projects with 6 floors and less than 20 meters. The rate is determined according to the total height or number of floors of the building and cannot be calculated in sections.
4. Internal and external pouring coefficient
The main structure is the project of 6 people pouring steel formwork on site, and the internal and external pouring quota is artificially multiplied by the coefficient 1.05. Artificial multiplication coefficient of internal pouring and external masonry quota 1.03.
This coefficient refers to the artificial increase cost of reserved holes in civil engineering to cooperate with installation engineering, and is mainly applicable to water supply and drainage and heating engineering.
5. Scaffolding erection and removal coefficient
It is a comprehensive coefficient.
In addition to the scaffolding fee specified in the quota, regardless of whether scaffolding is erected or not, or how many scaffolding is erected or dismantled, the scaffolding fee is calculated and used at one time according to the specified coefficient.
If there are multiple professional constructions in the same single project, which meet the requirements of scaffolding calculation, scaffolding fees will be charged according to the provisions of each volume.
6. System adjustment fee
The system debugging fee of HVAC engineering is a comprehensive coefficient, and the basis of its charging includes the labor cost of all projects such as pipeline valve installation, radiator and oil brushing insulation in heating engineering.
7. Installation and production are carried out at the same time, which increases the cost.
Installation and production are carried out at the same time, and the increased cost is calculated as 10% of the labor cost.
8. Increase the cost of building degradation that is harmful to the natural environment.
For construction in an environment harmful to health, the cost of reducing efficiency and increasing cost is calculated as 10% of labor cost.
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