Section 6-5 - Attachment to Existing Bridges or Structures (a) General. - (i) Attachment of utility facilities to the bridge deck surface, to the top of curbs and sidewalks, or to traffic or pedestrian railings will not be allowed. Open wire electrical or telephone line attachments are not allowed.
- (ii) Welding of utility attachments to main steel girders or direct attachment to main load carrying girders will not be allowed.
- (iii) Requests for attachment of utility lines to bridges shall be forwarded by the District Maintenance Engineer to the State Bridge Engineer for review and recommendation regarding the method of attachment.
- (iv) Prior to requesting attachment to bridges over railroad tracks from the Department, the applicant shall furnish written approval of a permit from the railroad company.
(b) Volatile and Corrosive Material. The attachment to a bridge or other structure of utility lines carrying flammable, corrosive, and/or explosive material may be permitted if the following criteria are met: - (i) Maximum line size shall be four inches of inside diameter.
- (ii) The maximum line pressure shall be 60 psig, which shall be verified in the presence of Department personnel.
- (iii) Each line shall be properly encased and vented.
- (iv) Each line shall have a shutoff valve, that activates automatically when a sudden pressure drop occurs, located within 300 feet of each end of the structure.