Category:1032 Precast Concrete Flared End Sections

This article establishes procedures for inspecting, sampling and reporting precast concrete flared end sections. Refer to Sec 1032 for MoDOT’s specifications.

1032.1 Apparatus

(a) Rule with suitable graduations to accurately measure the material to be inspected.

(b) OK - MoDOT stamp.

(c) Weather resistant marking materials.

1032.2 Procedure

1032.2.1 Acceptance by Inspection Method

Acceptance of precast concrete flared end sections is to be based on acceptance of materials incorporated into the end section, compressive strength of concrete as determined from cylinders or cores and inspection of the finished end section.

Confirm that the materials incorporated into the product are approved, that reinforcement is properly placed, that compressive strength of representative concrete is greater than 4,000 psi and that the finished section has proper dimensions and appearance.

End sections that are compliant on the basis of inspection are to be stamped MoDOT OK. The SiteManager Sample I.D. is to be printed next to the OK stamp. The stamp and marking should be on the inside of the left side of the flare as you look into the flared end, so it remains visible after installation.

End sections are to be reported to the contract using SiteManager.

1032.2.2 Acceptance by Certification Method

The district Operations Engineer may review the manufacturer's quality control procedures and make an annual recommendation to Construction and Materials regarding the appropriateness of acceptance of material by the certification process. Manufacturers approved to produce on certification are listed the table below. Material from listed manufacturers may be accepted based on certification, manufacturer's quality control documentation and compressive strength tests on samples.

Table 1032 Certified Fabricators of Precast Concrete Flared End Sections

Compressive strength of a sample, dimensions of representative end sections, workmanship and quality control processes and documentation are to be checked a minimum of twice each year. If they are not acceptable, the manufacturer will be notified immediately that they are no longer listed and any existing product is ineligible for MoDOT work. The manufacturer would be allowed to make new product under the procedure in 1032.2.1 Acceptance by Inspection Method.

End sections that are clearly marked with a listed manufacturer's name are acceptable on the basis of that name and do not require the MoDOT OK stamp or a Sample I.D. number on the end section.

To retain listing as a certified producer, the manufacturer must report any sections shipped for MoDOT work before, or the day of, shipment so the material may be reported by the district to the contract using SiteManager.

Compressive strength is to be determined for each 300 flared end sections of each size and type offered for inspection regardless of the inspection method, and should be recorded in SiteManager.