What is the sampling specification process for building materials submitted for inspection?

1) Sampling. The construction unit is responsible for material sampling and specimen production, and the witness personnel are responsible for witnessing material sampling and specimen production, and fill in the "Witness Record Ledger".

2) Submit for inspection. The process of handing over the specimen from the site to the test unit after sampling.

3) Receipt. 4) Test report. The test report should be printed by computer, using the provincial unified table, the signature must be hand-signed, and there should be a unified format of the special seal of "witness inspection".

5) Report collection. If the inspection results are qualified, the construction unit will receive the report and sign for registration; If the test result is unqualified, the witness will receive the test report.

Article 6 of the Ministry of Construction's [2000] No. 211 document "Provisions on the Implementation of Witness Sampling and Inspection for Housing Construction Projects and Municipal Infrastructure Projects", the scope of applicable varieties, as well as the energy conservation and environmental protection, glass tightness, wind pressure resistance and other materials stipulated by the local (provincial) should be witnessed sampling and inspection.

The specific number of samples and the number of representative batches should be familiar to the witnesses, because the witnesses are trained and certified, and the witnesses have forgotten that they can consult the monitoring station.

Steel bar raw material: 2 long and 2 short, long 50cm, short 30cm, each batch by the same factory, the same furnace number, grade, the same specification, grade, the same delivery state, the same entry time, hot-rolled ribbed steel bar composition 60t per batch, cold-rolled ribbed steel bar composition 50t per batch, cold-drawn steel bar 20t per batch, less than 20t, also a batch, all sampled once.

Definition. The planning, survey, design and construction, completion and other technical work carried out for the construction, reconstruction or expansion of buildings and ancillary structures and facilities, as well as the completion of engineering entities and the installation of supporting lines, pipelines and equipment. It also refers to the construction of various houses and buildings, also known as construction workload.

This part of the investment must be carried out through construction activities.

Sampling and inspection of construction engineering materials is to take representative samples and send them to the laboratory for retest and testing after the building materials enter the construction site to test whether the materials are qualified.

1. In fact, the materials to be inspected in the construction project have been expressed in detail in the current construction quality acceptance specifications, which define that all materials used in the project must be inspected or have quality certification documents. Because the content covered is very wide, it is recommended that you take a look at the detailed expressions and requirements in the specification. It should be noted that the specification only clarifies that the materials used for the project must have quality inspection or quality certification documents, which does not mean that each material must be inspected or tested, and the general materials can provide material quality certification documents that do not need to be sent for secondary inspection.

2. The inspection of engineering materials is an objective and rigorous work, and the building materials that need to be inspected and tested should be sampled, sealed and inspected under the witness of the witness, so the material inspection work on the project needs to be witnessed by a witness. However, it should be noted that the witness work of the materials is generally the relevant personnel of the supervision or construction unit who have obtained the qualification of the witness, and the project shall be filed before the start of the project and the witness record shall be filled in each witness.

The detailed process of construction materials for inspection, the more detailed the better, thank you.

1. If compulsory inspection is required, intercept or select samples with the participation of supervision according to the requirements of inspection and send them to professional testing institutions for testing; 2. Other construction engineering materials shall be submitted to the supervisor for review as required, that is, the material declaration form, and the supervisor or the owner shall jointly inspect the real sample and confirm that it can be used for construction; 3. After arriving at the laboratory, fill in the test form according to the requirements, after completion, go home and wait for the message to receive the test report, and copy it to the supervisor after getting the report. Dear, <>

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