What is the assembly cost? case analysis
Once PC components change due to mold changes, the invalid cost is huge…
The construction of PC components is difficult, and the components need grouting and gluing.
2.
increase in the cost of precast housing: 1.
4.
For every 10% increase in the assembly rate, the cost increases by about 150 yuan /m2.
3、 Suggestions for PC cost control: 1.
In the general contract, it is necessary to clarify the installation technology and measures of PC components to avoid wrangling in the later contract execution, such as site requirements, selection of tower crane, stacking frame, grouting material, silica gel, etc.
3.
The auxiliary materials in the PC component installation cost are mainly grouting materials and silica gel.
According to the price of main materials of PC components in the project, the corresponding price order is: PCF exterior wall >pc air conditioning board >pc stair board >pc exterior wall.
02PC precast component installation cost the comprehensive unit price of all PC component installation costs of the project: 884.96 yuan /m3 suggestions: 1.
General precast buildings (i.e.
PC outer wall: an integral cast outer wall, which is 25 cm thick and the same width as the wall.
The design and construction drawing bidding shall clarify the quota index of reinforced concrete of the group to avoid increasing the content of reinforced concrete due to PC components.
3.
Components need to pay 17% value-added tax for production in the factory.
Due to the wide variety of components, the production efficiency is reduced, so the production cost of PC components is increased.
It is connected with the main body through embedded parts and sleeves.
Some regions have just begun to implement precast housing, and PC manufacturers are seriously lack of production capacity, insufficient competition, and the scale effect cannot be reflected.
2、 Reasons for the increase in the cost of precast housing: 1.
When deepening the components, try to use less PCF exterior wall, and choose more PC exterior wall and PC stair board.
When the assembly rate reaches 15%, the cost increases by about 200 yuan /m2.
Generally, the thickness of PCF is 7 cm, which is connected with the main body through reserved reinforcement or embedded parts.
In the production of PC components, the investment of steel molds is increased.
When internal insulation is adopted, the saleable area and occupancy rate are reduced.
2.
For the same PC component, try to use components with less galvanized embedded parts; 3.
According to the order of PC component installation cost of the project: PCF exterior wall >pc exterior wall >pc air conditioning board >pc stair board 2.
At the same time, the mold of PC components is a turnover and amortization material.
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2.
Grouting materials and silica gel should be used as little as possible for the same component.
For the deepening of PC components, try to select multiple components of the same type to increase the turnover efficiency of the mold and reduce the amortization cost.
03 relationship between assembly rate and cost and suggestions I.
3.
PC components reduce design changes.
01 analysis of main materials of PC precast components the comprehensive unit price of main materials of all PC components in the project: 2854.15 yuan /m3 suggestions: 1.
The lifting weight of tower crane is also increased, which increases the construction cost.
PC projects) are mainly built: PCF exterior wall, PC exterior wall, PC air conditioning board, PC staircase board.
PC air conditioning board and PC stair board: it is connected with the main body through reserved reinforcement, and the installation is relatively simple.
PCF outer wall: the inner side is concreted and the outer side is hung with precast wallboard (also known as laminated wallboard).
The highest comprehensive unit price of PC components is PCF exterior wall, and the lowest comprehensive unit price of PC exterior wall and PC stair board.