901.17 Material Inspection for Sec 901
This article establishes procedures for inspecting and reporting those items specified in Sec 0901 for which Materials has responsibility and are not specifically covered in Materials Details of the Specifications.
- (a) Magnetic gauge, reading range of 0-40 mils (0-1000 m).
- (b) Rule with suitable graduations to accurately measure the material to be inspected.
The highway lighting items normally field inspected by Materials are galvanizing of anchor bolts, nuts, washers, polyurethane foam and steel standards, bracket arms and foundations.
Field determination of weight 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 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 Central Laboratory testing, if the magnetic gauge test results are within minus 15 percent of the specified coating weight.
Bolts and nuts specified to meet the requirements of ASTM A 307 shall be accompanied by a manufacturer's certification statement that the bolts and nuts were manufactured to comply with the requirements of ASTM A 307 and, if required by the specifications, galvanized to comply with the requirements of AASHTO M 232, Class C or were mechanically galvanized in accordance with the requirements of AASHTO M 298, Class 55. 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. The specified AASHTO 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 of zinc coating, when specified, is to be determined by magnetic gauge in the same manner as described in the previous paragraph except that a smaller number of single-spot tests will be sufficient. Samples for Central 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 2, Sampling Requirements.
Polyurethane foam used as pole backfill 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.
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 or materials purchased under a MoDOT purchase order is to be as described in 1101 Materials Purchased by a MoDOT Purchase Order.
Tests for weight of coating are to be reported through SiteManager. If a sample is submitted to the Central Laboratory for testing, use SiteManager.
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.