9-10 The retroreflection values on any sign shall not vary from each other by more than
a ratio of 1. 10 (1.20 white) at any 2 points at le ast 12 inches apart, nor more than 1.30 (1.30 white) at any 2 points anywhere on the sign, nor more than, 1.10 (1.20 white) at any 2 points on the border or between any 2 adjacent letters, numerals or symbols . Failure to meet the above requirements will result in sign rejection . Retroreflection will be tested using a retroreflectometer approved by the Engineer .
2.For prismatic material, sheeting will be subjected to a visual test with the human eye as the test instrument.
901-5 Measurement and Payment
Sign fabrication will be measured and paid as the actual number of square feet of sign face areas of each type, including milemarkers and overlays acceptably fabr icated. In measuring this quantity, the sign face areas will be calculated to the nearest 1/100 of a sf , using the dimensions shown in the contract. The areas of odd -shaped signs (e.g. stop signs and shield- shaped route markers) will be calculated as squa res or rectangles using the dimensions shown in the contract. The areas of round, diamond and triangular signs will be calculated for their true shapes using plan dimensions. Repair or otherwise correct any damage to the signs or refabricate them at no co st to the Department. When requested by the Contractor, the Department may have the necessary repairs made or the signs refabricated, and deduct the associated costs thereof from monies due the Contractor. Payment will be made under: Pay Item Pay Unit Contractor Furnished, Type ____ Sign Square Foot
902-1 Description
Construct foundations for sign supports including locating, staking, excavating, shoring, backfilling, forming, landscaping and other necessary tasks as required.
902-2 Materials
Refer to Division 10. Item Section Hot Applie d Joint Sealer 1028 -2 Borrow Material 1018 Organic -Zinc Repair Paint 1080 -7 Portland Cement Concrete Production and Delivery 1000 Reinforcing Steel 1070 Select Material s 1016
902-3 Construction Methods
Establish the proper offset, longitudinal location and foundation elevation of each ground mounted sign support. Provide proper level and orientation of all supports. Thoroughly compact all backfill in 6 inch layers. Remove all unneeded excavated material from the site.
Source: North Carolina Standard Specifications for Roads and Structures, 2024 Edition. Pages 402–402 of 857.