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MindMap Gallery Chapter 3 Section 2 and 3 Design Budget and Construction Drawing Budget Preparation

Chapter 3 Section 2 and 3 Design Budget and Construction Drawing Budget Preparation

First-level Cost Engineer Engineering Pricing Chapter 3, Sections 2 and 3, Design Estimates and Construction Drawing Budget Preparation, comprehensive knowledge, I hope it will be helpful to interested friends!

Edited at 2024-01-22 16:27:20

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Chapter 3 Section 2 and 3 Design Budget and Construction Drawing Budget Preparation

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Outline

Chapter 3 Section 2 and 3 Design Budget and Construction Drawing Budget Preparation

Section 2 Preparation of Design Budget

Main factors affecting project cost during the design stage

Main factors affecting the cost of industrial construction projects

General graphic design

site conditions

Covered area

Functional Division

Transportation method

technological design

Construction scale, standards and product plans;

Selection of process flow and main equipment;

Supply of main raw materials and fuel;

Production organization and labor quota in the production process;

"Three wastes" management and environmental protection measures, etc.

architectural design

Plane shape

Generally speaking, the simpler the building's plan shape, the lower the cost per unit area. The design of the building's plane shape should reduce the building perimeter coefficient on the premise of meeting the building's use functions. Generally, the lower the building perimeter coefficient, the more economical the design.

circulation space

On the premise of meeting the building use requirements, circulation space should be reduced to a minimum

space combination

Floor height: The building area remains unchanged, increasing the floor height increases the cost.

Number of floors: If the structural form remains unchanged, increasing the number of floors will reduce the cost. If the structural form changes, the unit cost will increase.

Indoor and outdoor height difference: If the height difference is too large, it will increase the cost; if the height difference is too small, it will affect the use and hygiene requirements.

Volume and area of buildings: the size increases and the cost per unit area decreases

building structure:

Buildings with five floors or less generally use masonry structure;

For large and medium-sized industrial plants, reinforced concrete structures are generally used;

For multi-story houses or long-span buildings, choose steel structures;

For high-rise or super-high-rise buildings, frame structures and shear wall structures are more economical

Column grid layout: For single-span factory buildings, when the column spacing remains unchanged, the larger the span, the lower the cost per unit area; for multi-span factory buildings, when the span remains constant, the greater the number of mid-spans, the more economical it is.

Building volume and area

building structure

Column grid layout

Material selection

Equipment selection

Main factors affecting the cost of civil construction projects

Main factors affecting project cost in residential community construction planning

The core issue in community planning and design is to improve land utilization

Land is saved by adopting methods such as high-low matching, combination of dots and strips, staggered arrangement front and back, partial east-west arrangement, diagonal arrangement or corner units.

On the premise of ensuring the residential function of the community, appropriately centralizing public facilities, increasing the number of floors of public buildings, rationally arranging roads, and making full use of corner land in the community will help increase building density and reduce the total cost of the community.

Save land by reasonably compressing the spacing between buildings, appropriately increasing the number of residential floors or matching high-rise and low-rise buildings, and appropriately increasing the length of houses.

Main factors affecting project cost in civil residential building design

In rectangular residential buildings, length:width = 2:1 is preferred; Generally, residential units consist of 3 to 4 residential units; A house length of 60~80m is more economical; Appropriately increasing the width of the residence will help reduce the construction cost; As the number of residential floors increases, the unit cost coefficient gradually decreases, but the marginal cost coefficient also gradually decreases; The index to measure unit composition and house type design is the structural area coefficient (the ratio of residential structural area to building area). The smaller the coefficient, the more economical the design plan will be.

Other factors affecting project cost

Knowledge level of design units and designers

Interest demands of project stakeholders

risk factors

The concept of design budget and its preparation content

Static investment serves as the basis for evaluating and selecting design solutions;

Dynamic investment serves as a limit for project financing, supply, and control over the use of funds.

Level three budget estimates

The unit project budget estimate is The most basic calculation file

Construction project budget estimate

Equipment and installation project budget estimates

Comprehensive budget estimate for a single project: compiled by summarizing the project budget estimates for each unit in a single project

Construction project total budget estimate

The comprehensive budget estimates for each individual project, other project construction cost estimates, reserve fees, interest during the construction period and preliminary working capital estimates are compiled and compiled.

Preparation of design budget

Preparation of unit project budget estimates

Construction project budget estimate

Budgetary quota method: also known as the expanded unit price method and the expanded structure quota method, which requires that the preliminary design must reach a certain depth

Estimated budget indicator method: When the design has no detailed drawings but only a conceptual design, or the preliminary design is not deep enough, there are similar project budget indicators that can be used, and there is an urgent need to determine the cost.

Similar project budget method

Equipment and installation project budget estimates

Budget unit price method: When the preliminary design is deep and there is a detailed equipment list

Expanded unit price method: When the preliminary design depth is not enough, the equipment list is incomplete, and there is only the main equipment or the weight of the complete set of equipment.

Equipment value percentage method: When the preliminary design depth is not enough and there is only the ex-factory price of the equipment without detailed specifications and weight, the installation fee can be calculated as a percentage of the equipment cost.

Comprehensive tonnage index method: When the equipment list provided by the preliminary design has specifications and equipment weight (the equipment list is complete). This method is often used to estimate the installation project budget for non-standard equipment and imported equipment where equipment prices fluctuate greatly.

Preparation of individual project budget estimates

Construction project total budget estimate

It is composed of comprehensive budget estimates for each individual project, other project construction costs, interest during the construction period, reserve fees and preliminary working capital estimates for operating projects, and is prepared in accordance with the unified form prescribed by the competent department.

Section 3 Preparation of Construction Drawing Budget

The meaning of construction drawing budget

The construction drawing budget can be the plan or expected price calculated based on the construction drawings and in accordance with the budget quota, fee standards, various project pricing information, etc. before or during the project bidding;

It can also be the actual budget price calculated by the construction enterprise after winning the project bid based on its own enterprise quota, resource market price, market supply and demand, and competition conditions.

The role of construction drawing budget

Effect on investors

1) The construction drawing budget is an important link in controlling the project cost during the design stage, and is an important measure to control the construction drawing design so as not to exceed the design estimate.

2) Construction drawing budget is the basis for cost control and rational use of funds.

3) The construction drawing budget is the basis for determining the maximum bid limit for the project.

4) The construction drawing budget can be used as the basis for determining the contract price, allocating project progress payments and handling project settlement.

Effect on construction companies

1) The construction drawing budget is the basis for the construction company’s bidding quotation.

2) The construction drawing budget is the basis for the construction project budget and the main content of the construction contract.

3) The construction drawing budget is the basis for the construction enterprise to arrange and allocate construction forces and organize the supply of materials.

4) The construction drawing budget is the basis for construction companies to control project costs.

Preparation of construction drawing budget

Preparation of unit project construction drawing budget

physical quantity method Consumption quota × actual unit price

Direct cost per unit project = Comprehensive man-day consumption x Comprehensive man-day unit price ∑ (Consumption of various materials x Corresponding unit price of materials) ∑ (Consumption of various construction machinery x unit price of corresponding construction machinery shift) ∑ (Consumption of various construction instruments x unit price of corresponding construction instrument shift) (3. 3.1) Unit project budget cost = unit project direct cost, enterprise management fee, profit, regulatory fee, tax

unit price method for work and materials Unit valuation table or fixed base price × price adjustment coefficient or index

Unit project budget cost = (∑ Sub-project quantity x Sub-project unit price of materials) Corporate management fees, profits, fees, taxes

Preparation of comprehensive budget for individual projects

Preparation of total budget for construction projects

Please refer to Chapter 1 for the specific preparation method of other project construction expenses, reserve funds, interest during the construction period and preliminary working capital. related information. Taking the time when the construction drawing budget of the construction project is prepared as the boundary, if the above expenses have already been incurred, they will be listed at the reasonable amount incurred. If they have not yet been incurred, they will be calculated and included according to the original budget content and the billing principles of this stage.