9-14 to the nearest 1/10 of a linear foot. The computed linear feet of s ign supports, as indicated in
the final revised plans will be use d in determining this quantity. Supports, Steel Square Tube will be measured and paid as the actual number of linear feet of steel square tube support s incorporated into the completed and acc epted supports and assemblies. Measurements of length will be made to the nearest 1/10 of a foot. Payment will be made under: Pay Item Pay Unit Supports, Breakaway Steel Beam Pound Supports, Simple Steel Beam Pound Supports, 3 -lb Steel U-Channel Linear Foot Supports, 2 -lb Steel U -Channel Each Supports, Barrier (Small) Each Supports, Barrier (Large) Each Supports, Steel Square Tube Linear Foot Supports, Wood Linear Foot
904-1 Description
Erect existing and proposed ground mounted and overhead signs to existing and proposed supports and furnish mounting hardware. Relocate existing signs in accordance with the contract and Specifications. The types of signs covered by this section are as follows : Type A signs Type B signs Type D signs Type E signs Type F signs Milemarkers Overlay signs Reposition signs Logo Trailblazer Logo to panel Relocation signs
904-2 Materials
Refer to Division 10. Item Section Signing Materials 1092 Organic -Zinc Repair Paint 1080 -7
904-3 Construction Methods
A.General Provide new mounting bolts, washers, hex nuts, backing plates and all hardware for signs to be mounted on existing or proposed supports. Do not weld, cut or fabricate in any manner in the field, except for as allowed under Section 903 and for the drilling of holes for attaching demountable legends and borders that cannot be attached in the shop. Field drill Z-bars for attaching signs to supports as required.
9-15 Use 2 coats of a n approved non-aerosol organic -zinc repair paint in touching up f ield-
drilled holes and damaged areas on all galvanized materials as covered under Section 903. Make sure that the horizontal edges of signs are level and that the faces of signs are vertical. Refer to Sections 900 and 901 for requirements of care and handl ing of signs, final clean up and covering of signs.
B.Type A and B
1.General Attach the signs to supports in accordance with the contract or the approved shop drawings. Make sure that the face of the sign is flat. Any appreciable buckling or warping of the sign face will be cause for rejection of the entire sign.
2.Ground Mounted Erect ground mounted Type A and B secondary signs by the required method of attachment shown in the contract. Affix these signs by bolting the horizontal Z-stringers directly to the supports or by bolting vertical Z-bars to the horizontal Z-stringers of the primary sign.
3.Overheads For new overhead supports, erect overhead secondary signs in accordance with the approved shop drawings. For existing overhead supports, design and furnis h all new structural members and mounting hardware necessary to erect the new signs. Prepare and submit to the Engineer for approval complete shop drawings and design computations for the bracing and accessory hardware required to attach the sign to the e xisting overhead sign support. Prepare the design in accordance with AASHTO Structural Supports for Highway Signs, Luminaires and Traffic Signals , and the Interim Specifications as shown on the plans . Upon request, the Engineer will provide the Contractor with copies of the shop drawings for e xisting overhead sign supports. Attach a new sign above a designated existing overhead sign in accordance with the contract. Furnish all new structural members and mounting hardware necessary to erect the n ew sign.
C.Type D, E, F and Milemarkers Attach the signs to U -channel or perforated square tube support s
D.Overlay (Ground Mounted and Overhead) Attach overlays to designated existing ground mounted or overhead signs as required by the contract. Remove and dis pose of all conflicting demountable legends, borders and overlays before attaching new overlays. Employ any method of removal necessary, provided it does not damage the existing sign or the attached overlay. Perform such minor repairs to existing signs a s necessary before the attachment of overlays to ensure a finished sign face that is completely flat. Field -drill 5/32 inch holes in both the overlay and the existing sign simultaneously, according to the rivet spacing requirements shown in the contract. Attach the proposed overlays with 1/8 inch diameter aluminum rivets of the “pull- through” type. Exercise sufficient care in attaching the overlays to ensure that the finished sign face is completely flat and without any ripples and/or buckles.
9-16 (E) Reposition Overhead Signs
Reposition existing signs on existing overhead sign supports as required by the contract. Reposition associated lighting systems and secondary signs along with the signs. When required, drill new holes in the existing vertical attachment members, in order to maintain a minimum clearance of 17 f eet to the roadway surface at the new location on the structure. No other field drilling will be allowed. Adjust and relocate conduit and junction boxes as required.
F.Logo Trailblazer All logos will be made available for pick up at the Division Traffic Services’ sign shop. Erect logos on U -channel or perforated square tube support s in accordance with Type F sign details shown in the contract.
G.Logo to Panel All logo panels and logo mileage panels will be made available for pick up at the Division 13 Traffic Services’ sign shop. Attach logo panels to the mainline signs with ten 1/8 inch diameter rivets of the pull through type. Attach logo panels to the ramp signs with four 1/8 inch diameter rivets of the pull through type. Attach mileage panels to ramp signs with six 1/8 inch diameter riv ets of the pull through type. Drill 5/32 inch holes in the background signs to match those in the logo panels and logo mileage panels for attachi ng the se signs to the background signs. The mileage panel shall be installed 1/2 inch below the log o panel with 3 rivets at the top and 3 rivets at the bottom spaced evenly apart. Place logo as shown on the contract.
H.Relocation (Ground Mounted) Signs Maintain signs in good serviceable condition throughout the duration of the project. Repair any areas or materials within the project limits disturbed or damaged in performance of the work required under this section as directed by the Engineer at no cost to the Department. Remove existing signs from their existing locations and relocate to their new location in accordance with the contract. Repair or replace signs damaged in relocating at no cost to the Department. Refer to Section 907 for disposal of sign components. Erect signs and supports according to requirements of Sections 903 and 904. Immediately relocate all warning and regulatory signs to new locations. Relocate all other signs to new locations in no more than 12 hours.
904-4 Measurement and Payment
Sign Erections (Ground Mounted and Overhead) will be measured and paid as the actual number of ground mounted and overhead signs erected and accepted. Each type F sign assembly will be measured as one sign. Sign Erection, Relocate Type ____ (Ground Mounted) will be measured and paid as the actual number of signs acceptably relocated. Secondary signs will be incidental work in conjunction with the primary sign. Sign assemblies consisting of more than one sign panel will be considered one si gn. Sign Erection, Logo Mileage Panel to Sign will be measured and paid for as actual number of Mileage Panels erected and accepted. Payment for Sign Erection, Logo Mileage Panel to Sign shall be incidental to Sign Erection, Logo to Panel erection unless only replacing the logo mileage panel. Payment will be made under:
Source: North Carolina Standard Specifications for Roads and Structures, 2024 Edition. Pages 406–408 of 857.