Engineering quantity calculation is a basic and important work in business work, in the daily work often encounter problems about engineering quantity calculation, now do a brief summary for everyone to share.
Familiar with calculation rules
First, be familiar with the calculation rules related to specifications, and pay special attention to the following rules:
1. Ribbed glass curtain wall is calculated according to the expanded area, that is, the glass ribbed area should be included in the project amount.
Common problems: some list staff according to the facade area calculation, we sometimes used to use according to the facade area, pay attention to the material consumption and area calculation method is consistent, such as bidding list is not clear calculation rules, we can answer questions, but also can use a certain quotation strategy flexible processing.
2, doors and Windows according to the unit of measurement, also can be measured by the area; When calculating according to the area, pay attention to the specification of modern curtain wall design for the size area of the hole.
Common problems: some are calculated according to the size area of the hole after painting, some are calculated according to the size area of the window profile frame, and some are calculated according to the size of the facade decoration. According to the size of the casing outside the window profile area computation sometimes 8% less than the hole size area, deviation is large, the curtain wall facade decoration frame size is smaller, because there are some material will be outside decoration materials, we should pay attention to choose good way of measurement, such as the completion settlement according to the size of the hole.
3. The steel structure shall be calculated by mass according to the size shown in the design, without deducting the hole, edge cutting and limb cutting mass. The welding rod and bolt shall not increase the mass.
Common problems: some personnel external settlement, calculation of steel plate according to the actual area of steel plate calculation, resulting in less engineering. Some subcontractors calculate the weight and multiply by a coefficient, it is added welding rod weight or loss and so on, resulting in a lot of curtain wall construction. In addition to item by item review method, the inspector can also use the overall complex law, the total area will not have a big difference.
In addition, we should use favorable calculation methods according to different working stages, such as external completion settlement and production factors settlement, different positions, calculation methods can be different.
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Post time: Apr-20-2023
