903.23 Material Inspection for Sec 903

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This article establishes procedures for inspecting and reporting items specified in Sec 903 or in contracts having special provisions for which Materials has inspection responsibility but have not been specifically covered in the specifications.

903.21.1 Apparatus

(a) Magnetic gauge, reading range of 0-40 mils (0-1000 \mu\,m).
(b) Rule with suitable graduations to accurately measure the material to be inspected.

903.21.2 Procedure

The items for highway signing specified in Sec 903 normally inspected by Materials are galvanizing of steel trusses, posts, etc., bolts, nuts, washers and polyurethane foam.

Field determination of weight (mass) of coating is to be made on each lot of material furnished. The magnetic gauge is to be operated and calibrated in accordance with ASTM E 376. At least three members of each size and type offered for inspection are to be selected for testing. A single-spot test is to be comprised of at least five readings of the magnetic gauge taken in a small area and those five readings averaged to obtain a single-spot test result. Three such areas should be tested on each of the members being tested. Test each member in the same manner. Average all single-spot test results from all members to obtain the average coating weight (mass) to be reported. The minimum single-spot test result would be the minimum average obtained on any one member. Material may be accepted or rejected for galvanized coating on the basis of magnetic gauge. If a test result fails to comply with the specifications, that lot should be re-sampled at double the original sampling rate. If any of the resample members fail to comply with the specification, that lot is to be rejected. The contractor or supplier is to be given the option of sampling for Laboratory testing, if the magnetic gauge test results are within minus 15 percent of the specified coating weight (mass).

Bolts and nuts specified meeting the requirements of Sec 1080 shall be accompanied by a manufacturer's certification statement that the bolts and nuts were manufactured to comply with the requirements of Sec 1080 and, if required by the specifications, galvanized to comply with the requirements of AASHTO M 232, or were mechanically galvanized and meet the coating thickness, adherence and quality requirements of AASHTO M 232, Class C. High strength bolts, nuts and washers shall be accompanied by a manufacturer's inspection test report for each production lot or shipping lot furnished and certifying that the bolts furnished conform to the requirements specified. All bolts, nuts and washers are to be identifiable as to type and manufacturer. Bolts, nuts and washers manufactured to meet ASTM A 307 will normally be identified on the packaging since no special markings are required on the item. High strength bolts and nuts require special marking on the item. The specified AASHTO or ASTM is to be consulted for the required identification marks on high strength bolts and nuts. Dimensions are to be as shown on the plans or as specified. Weight (Mass) of zinc coating, when specified, is to be determined by magnetic gauge in the same manner as described in the above paragraph except a smaller number of single-spot tests will be sufficient. Samples for Laboratory testing are only required when requested by the State Construction and Materials Engineer or when field inspection indicates questionable compliance. When samples are taken, they are to be taken at the frequency and of the size shown in Table 1040.2.1.2 Sampling Requirements.

Polyurethane foam used for footings for embedded type signposts is to be accepted on the basis of manufacturer's certification and random sampling and testing. The manufacturer's certification is to show typical test results representative of the material and certify that the material supplied conforms to all of the requirements specified. Random samples are to be taken from approximately 10 percent of the lots offered for use. A sample is to consist of a portion of each component adequate in size to yield 2 cu. ft. of polyurethane foam, after mixing. SiteManager is to be used when submitting samples to the Central Laboratory. Very small quantities of polyurethane foam may be accepted on the basis of brand name and labeling, provided satisfactory results are obtained in the field.

Flexible Delineator Posts

Flexible delineator posts are to be accepted on the basis of manufacturer and brand name approval, manufacturer's certification certifying that the posts and reflective sheeting furnished are of the same composition as originally qualified for manufacturer and brand name approval and in no way has been altered or changed, and field inspection for dimensions and workmanship. Samples are only to be taken when directed by the State Construction and Materials Engineer. A list of those brand names and manufacturer's which have been qualified is shown in Table 1044 Qualified Brands and Manufacturers of Flexible Delineator Posts (1044MKPSFX).

903.21.3 Reports (Records)

Reports shall indicate acceptance, qualified acceptance or rejection. Appropriate remarks, as described in 106.9 Reporting Test Results, are to be included in the report to clarify conditions of acceptance or rejection. Distribution of reports for materials purchased under a MoDOT purchase order is to be as described in 1101 Materials Purchased by a Department Purchase Order.

Tests for weight (mass) of coating are to be reported through SiteManager. If a sample is submitted to the Central Laboratory for testing, SiteManager is to be used. The Central Laboratory will perform the designated tests and complete the report.

Polyurethane foam shall be reported through SiteManager. The manufacturer's certification shall be retained in the district office, except when reporting very small quantities accepted by brand name and labeling.

Flexible delineator posts shall be reported through SiteManager. The manufacturer's certification shall be retained in the district office.

903.21.4 Missouri Logo Sign Program

MoDOT inspects materials used under the Missouri Logo Sign Program as a “permit” inspection. MoDOT does not directly build the signs, but our specifications and acceptance are required. As a result, an inspector needs to assure that all components are as defined under Sec 903.

903.21.4.1 Procedure

All materials shall comply with the requirements of the MoDOT Standard Specifications and shall be sampled and inspected in accordance with the Engineering Policy Guide.

Time charges for inspection of materials used in the Missouri Logo Sign Program shall be as follows:

Function: 225
Work ID: UDC 91PE (The UDC number will be the appropriate district or Division)

903.21.4.2 Reports

Materials are to be reported using SiteManager. Instead of the regular 1042SM material code, the 1042SMLOGO material code should be used.

Reports should be distributed to meet the requirements of a “permit” inspection.