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* �, IV A " -` . ,-e , � xs .. 993 OBJECT MARKERS AND DELINEATORS . AAA (REV 7-840) (FA 74640) ( 141 ) SUBARTICLE 993 - 1 . 4 (Page 975 ) is deleted and the following substituted : 9934 .4 Posts : The marker posts shall be of steel or aluminum as shown in the Design Standards or plans . Steel posts shall be 2 . 5 lb/ft . flanged U - Channel . The U-channel posts shall meet the mechanical requirements of ASTM A 499 , Grade 60 . Provide U- channel posts that have been galvanized after fabrication in accordance with ASTM A 123 and have a smooth unifonn finish free from defects affecting strength , durability and appearance . For each U - channel , punch or drill 3 / 8 inch diameter holes on 1 inch centers through the center of the post, starting approximately 1 inch from the top and extending the full length of the post. Punching or drilling operations shall be completed prior to galvanization . The weight per foot of a manufacturer ' s U- channel size shall not vary more than plus or minus 3 . 5 % of its specified weight per foot . Machine- straighten the U- channel to a tolerance of 0 . 4 % of the length . U - channel posts shall be listed on the QPL . Round aluminum posts shall meet the requirements of Index 11860 . Use attachment hardware (nuts , bolts , clamps , brackets , braces , etc . ) of aluminum or galvanized steel . SUBARTICLE 993 -2-2 ( Page 975 ) is deleted and the following substituted : 993 -2 . 2 Flexible Post Delineators : 993 -2 . 2 . 1 Dimensions : The post shall have a minimum width of 3 inches facing traffic and of such length to generally provide a height of 48 inches above the pavement surface . 993 -2 . 2 . 2 Color : The post shall be opaque white . The yellowness index shall not exceed 12 when tested in accordance with ASTM D 1925 or ASTM E 313 . The daylight 45 degree , 0 degree luminous directional reflectance shall be a minimum of 70 when tested in accordance with ASTM E 1347 . 993 - 2 . 2 .3 Retroreflective Sheeting : The reflective sheeting shall be Types III, IV , V or VII and meet the requirements of Section 994 . The reflective sheeting shall have a ALL minimum width of 3 inches and have a minimum area of 30 square inches . 993-2 . 2 . 4 Impact Performance : Posts shall be tested and evaluated according to the National Testing Product Evaluation Program (NTPEP) Project Work Plan for Field Evaluation of Flexible Surface Mounted Delineator Posts . A temperature of 65 ° F or greater may be used in lieu of the NTPEP temperature requirements . Posts shall be capable of returning to a vertical position plus or minus 5 degrees with no delaminating, and one post may list no more than 10 degrees . No post shall split, crack, break, or separate from base . LAI SUBARTICLE 993 - 2 . 3 . 1 (Page 975 ) is deleted and the following substituted : 993 -2 . 3 . 1 Posts : The posts shall meet the requirements of 9934 . 4 , except the steel delineator post shall be 1 . 1 lb/ft . -254 - FPID ( S ) : 423186 - 1 - 5 8 - 01 yIV �.