Steel reinforcement engineering accounts for a large proportion of the project cost, among which steel reinforcement is a very important material. The steel bar sub project has a long process, involves many personnel, has a large amount of steel bar data, various types, and complex calculations, which leads to many problems in steel bar management, such as excessive consumption of steel bars, low utilization of raw materials, and a large amount of waste materials on the processing site. Below are the key points related to steel bar material management for reference.
Procurement phase
The procurement stage should first consider the actual usage of steel raw materials in each stage, the scale of the steel storage site, the existing surplus steel bars and materials on site, and comprehensively formulate the optimal steel bar procurement plan. At the same time, the appropriate length of steel bars should be selected reasonably based on the cutting list and the actual situation of the construction site.
When steel reinforcement materials enter the site, it is necessary to check whether the steel is accompanied by the manufacturer’s quality certification documents, and take samples for acceptance and appearance inspection of the steel reinforcement. Among them, the surface of hot-rolled steel bars shall not have cracks, scars, or folds; The wire rod is allowed to have indentations, local bumps, scratches, and rough surfaces, but its depth or BIM tutorial height shall not exceed 0.2mm, and the weight of the oxidized iron scale (rust) on the surface of the steel bar shall not exceed 16kg/t. If any steel does not meet the requirements, it should be promptly returned and not used to avoid discovering unqualified steel during the construction process and causing unnecessary waste.
Storage stage
After the steel bars enter the site, they will involve the storage management of steel. Due to the large quantity of steel bars and the extremely complex BIM learning models, there are also many daily entry and exit flows, which increases the difficulty of on-site storage management of steel bars.
Therefore, the use of steel bars should be uniformly allocated and managed, registered, regularly inventoried, checked for loss rates, and strictly recorded for the amount of surplus materials in order to manage and utilize them. At the same time, a quota based material requisition system should be established, and material distribution should be strictly carried out in accordance with the principle of “first in, first out, pushing the old and storing the new”.
In addition, steel bars should be stacked strictly according to specifications and models, and raw materials and semi-finished steel bars should be stacked separately, with targeted protective measures taken. At the same time, the organization and management of steel should be done well, supply contracts should be fulfilled, material matching supply plans should be adjusted, on-site material management should be strengthened, and waste materials should be recycled and reused.
Cutting stage
The on-site processing of finished steel bars has a significant impact on the amount of steel bars used. Therefore, before processing steel bars, the steel bar batching plan should be optimized, and the cutting list and samples should be reviewed and confirmed to be correct before batch cutting can be carried out to reduce steel waste during the steel bar processing.
During the steel bar cutting stage, long materials should be used or cut first, and then the remaining short materials should be used reasonably, without overusing or using inferior materials. If there is any loss of steel bars, they should be prioritized for use in horse stool reinforcement, embedded parts, short hole reinforcement, etc., and long and short end steel bars can be welded and used together, thereby greatly saving steel bar usage.
In addition, steel bars must be processed in batches, and each batch should be a construction section of no less than 30m in length. It is not allowed to make and tie each component at the same time, so as not to affect the project progress, or cause a large amount of material waste and serious idling.
Article source: Architectural Technology Magazine
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