Timber posts and offset blocks shall be structural timber conforming to the requirements of AASHTO M168 and be treated in conformance with the requirements of AASHTO M133.
CONSTRUCTION
a. Guard rail of the kind and type shall be constructed at the locations as determined by the Engineer.
b. All posts shall be set vertically in the positions. Post holes for steel posts shall be back-filled with a minimum 100 mm surround of Class E concrete tamped into place.
c. Steel rail sections shall be cut,