898 The grounding connection shall be located 12 in. from the bottom of the support and shall be easily accessible from the structure manhole. Traffic shall be maintained in accordance with 801.16 during installation. 1 . T r u s s e s 170 When placed on blocks to produce the required camber, the truss sections shall fit together at the flange connections with a minimum gap of 1/16 in. on any flange assembly. The total of the gaps in any one connection shall not exceed 1/8 in. Gaps shall be shimmed with tapered shims before tightening the flange bolts. Vertical truss members and vertical diagonals shall be machined to provide a snug tube-to-tube fit to the chord along the entire edge before welding. Horizontal truss members and horizontal diagonals shall be slotted for the dimensions shown on the plans and welded to the gusset plates. They shall be sealed against water penetration. Chord flanges shall be machined from solid rounds. Mating surfaces shall be flat within 1/64 in. Flanges shall be given an add itional finish if necessary to ensure contact between plates. The cap bolts used to attach the top cap s of end-support columns shall be located so as to miss the J hook. The camber shown on the plans is for fabrication only. It shall be measured with the truss fully supported. The allowable camber tolerance is 25% of the specified camber value. 190 All signs and walkway brackets shall be placed as close to the brace points as possible. The Contractor shall verify that th e dimensions are suitable for the type of fixture to be supplied.
2.Monotube The required camber shall be achieved in accordance with the manufacturer’s recommendations as detailed on the working drawings. 3. Cantilever Arms 200 Cantilever arms shall fit together at the flange connections between sections with a minimum gap of 1/16 in. on any flange assembly. The total of the gaps in any one connection shall not exceed 1/8 in. Double arm chords are octagonal tubular shape with 0.14 in./ft taper. Quadri-chord arms are circular shape with constant diameter.
4.Bridge Brackets The location of the sign bracket may be shifted to avoid joints or stiffeners on the bridge. Before placing aluminum in contact with concrete, both the concrete and aluminum surfaces shall be coated w ith an aluminum-imp regnated caulking compound. Where aluminum surfaces are to be placed in contact with steel, the steel 210 802.07 899 surface shall be given one coat of zinc chro mate paint and the aluminum surfaces shall be coated with an aluminum-impregnated caulking compound before placement. After the bolts have been tightened, the excess caulking compound shall be removed. All openings around the flanges shall be fully painted and shall be flush with the caulking compound. 802.08 Installing Signs If new signs are to be installed on existing overhead sign structures, the existing mounting hardware, if applicable, may be reused. Bolts, nuts, and washers shall not be reused. Additional new hardware may be required to complete the mounting. All such 220 sign hangers protruding above the new signs shall be cut off flush to the top of the signs. Splicing or overlapping of sign hangers will not be allowed. All unused sign hangers and hardware shall be removed. A minimum of two sign support bracket assemblies will be required for all signs having a width greater than 30 in. Signs 7 ft or less in height shall have sign support bracket assemblies mounted at a maximum spacing of 7 ft. Signs greater than 7 ft in height shall have sign support bracket assemblies mounted at a maximum spacing of 5 ft. Sign overhang beyond the end bracket asse mbly shall be not more than half the spacing of the bracket assemblies. 230
a.Sheet Signs Sheet signs shall be fastened to the post as shown on the plans. Rivets shall be used to fasten sheet signs mounted to panel or other sheet signs. Steel and plastic washers shall be placed as shown on the plans. Lock-nuts shall be tightened sufficiently so that the sign is held firmly against the post. If the sign sheeting is twisted or damaged, the sign shall be replaced. Lock-nuts for cable span mounted signs shall be tightened so that the sign is held firmly against the cable. There shall be no deformation or twisting of aluminum 240 sheeting, or damage to the reflective sheeting.
b.Panel Signs Panel signs shall be mounted as follows: 1. Up to and including 24 ft of sign width, clips shall be placed on both sides of each post at the top and bottom of the sign. Intermediate clips shall be placed one on each panel on each post and shall alternate left and right on each post.
2.Over 24 ft of sign width, double clips shall be used, one on the right side and one on the left side on each post per panel width, plus the sets necessary to attach the top and bottom of the sign.
3.Lock-nuts shall be torqued two full turns beyond snug fit. 802.08 900 Panels shall be bolted together on 24 in. centers with an allowable gap of no more than 1/16 in. between units. Panels shall be temporarily braced in accordance with the panel manufacturer’s recommendations.
802.09 Removal, Resetting, or Reloca tion of Signs or Support Assemblies
Signs to be relocated shall be installed in accordance with the MUTCD and on new posts. Signs to be reset shall be installed in accordance with the MUTCD and on existing posts. Signs or support assemblies to be removed shall be removed within five work days after the required replacement signs or support assemblies are installed. Concrete foundations shall be removed to a minimum depth of 1 ft below the ground surface. After concrete foundations have been removed, the area shall be backfilled and seeded or sodded in accordance with 621, or treated wi th a material which matches that in the 270 surrounding area.
802.10 Roadway and Bridge Reference Signs If existing roadway and bridge reference signs interfere with the prosecution of
other work, such signs and posts shall be removed, stored, and then reinstalled within 25 ft of their original longitudinal location or as directed.
802.11 Method of Measurement
Sheet signs and panel signs will be measured by the square foot. Sheet signs will be measured as the smallest dimensions of a square or rectangle large enough to make 280 the sign. However, triangular or trapezoidal signs will be measured as the smallest triangle or trapezoid required to make the sign. If the pay unit for sheet signs is shown in the Schedule of Pay Items as each, the number of sheet signs specified, including posts, hardware, and erection, will be measured by the number of units installed. Sign posts will be measured by the linear foot. Square sign posts will be measured from the top of the post to the termination of the post in the anchor base. 290 Traffic sign support foundations will be measured by the number of units of each type installed. No reduction will be made in a unit if class X material is encountered during foundation excavation. If class X material is encountered dur ing foundation excavation, the quantity to be measured will be that authorized and removed and in accordance with 206.10. Structural steel, breakaway, will be measured by the pound. Such measurement will include the weight of breakaway sections such as stiffeners, base plates, and fuse plates. 300 Reference posts, including post, sign, and hardware, will be measured by the number of units installed. 802.09 Backfill of traffic sign support foundations will be measured in accordance with
211.09 Overhead sign structures will be measured by the number of units of each type
installed. Overhead sign structures to be removed will be measured by the number of structures removed. Existing ground mounted signs reset will be measured by the number of signs removed and reinstalled, complete in place. 802.12 Basis of Payment The accepted quantities of sheet signs and panel signs will be paid for at the contract unit price per square foot, of the type and thickness specified, with legend, complete in place. 320 Sign post will be paid for at the contract unit price per linear foot for the type specified. Structural steel, breakaway, will be paid for at the contract unit price per pound. Ground mounted sign support foundations will be paid for at the contract unit price per each type specified. Reference posts will be paid for at th e contract unit price per each, complete in 330 place. Payment for class X material encountered during a foundation excavation will be made in accordance with 206.11. Payment for backfill of support foundations will be made in accordance with 211.10. The removal of signs, overhead structures, and sign assemblies, will be paid for at the contract unit price per each. 340 Existing ground mounted signs reset will be paid for at the contract unit price per each. Payment will be made under: Pay Item Pay Unit Symbol Box Truss Sign Structure Foundation, _____ ............................ EACH type 350 802.12 902 Cable Span Sign Structur e Foundation, _____ .......................... EACH type Cantilever Sign Support Foundation, _____ ............................. EACH type Overhead Butterfly Cantilever Sign Structure Foundation, _____ ...................................... EACH type Overhead Sign Structure, _____, Remove ................................ EACH type Overhead Sign Structure, Box Truss, _____ ............................. EACH 360 type Overhead Sign Structure, Br idge Bracket Assembly ................. EACH Overhead Sign Structure, Butterfly Cantilever .......................... EACH Overhead Sign Structure, Cantilever, _____ ............................. EACH type Overhead Sign Structure, Monotube ......................................... EACH Overhead Sign Structure, Tri-Chord, _____ .............................. EACH type Reference Post ........................................................................... EACH Sign and Supports, Wide Flange, Remove ................................ EACH 370 Sign Post, _____ ........................................................................ LFT type Sign Post, Square, _____, Reinforced Anchor Base .................. LFT type Sign Post, Square, _____, Unreinforced Anchor Base .............. LFT type Sign, Double Faced, Sheet, With Legend, _____ ...................... SFT thickness Sign, Ground Mounted, Reset ................................................... EACH Sign, Overhead, Remove ........................................................... EACH 380 Sign, Panel, Relocate ................................................................. EACH Sign, Panel, Remove.................................................................. EACH Sign, Panel, With Legend .......................................................... SFT Sign, Sheet Assembly, Relocate ................................................ EACH Sign, Sheet, and Supports, Remove ........................................... EACH Sign, Sheet, Relocate ................................................................. EACH Sign, Sheet, Remove.................................................................. EACH Sign, Sheet, With Legend .......................................................... EACH Sign, Sheet, With Legend, _____ .............................................. SFT thickness 390 Structural Steel, Breakaway ...................................................... LBS Tri-Chord Sign Structur e Foundation, ______ .......................... EACH type Wide Flange Sign Post Support Foundation, _____ .................. EACH type 802.12 903 The cost of staking sign and sign structure locations, including materials and labor, shall be included in the cost of the pay items in this section. The cost of removal of signs, sign assemblies, sign lighting circuitry, supports, 400 concrete foundations, backfill material, s odding, seeding, and n ecessary incidentals shall be included in the cost of overhead sign structure, remove. The cost of walkway assembly, where appl icable, shall be included in the cost of overhead sign structure. The cost of roadway and bridge reference signs and posts to be removed, stored, and reinstalled shall be included in the cost of other pay items, unless otherwise specified. Roadway and bridge reference si gns which are damaged by the Contractor shall be replaced with no additional payment. 410 The cost of the reinforced anchor base or unreinforced anchor base, angle bolts, and rivets shall be included in the cost of sign post, square. No additional payment will be made if square sign posts are used in lieu of Type A or Type B posts. The cost of all hardware to attach the sign to its structural supports, the reflective sheeting on both faces, and all legend shall be included in the cost of double-faced sheet signs. 420 The cost of all hardware necessary to asse mble and attach the sign to its structural supports, all legend, and adjustments necessary to eliminate specular reflection shall be included in the cost of sheet sign or panel sign. The cost of all necessary hardware in cluding sign hangers, clips, and U bolts required for the mounting of signs to existing or new overhead sign structures shall be included in the cost of the sign. The cost of modifying existing hardware to mount a new sign shall be included in 430 the cost of the new sign. The cost of identification markings for signs shall be included in the cost of the sign. The cost of existing ground mounted sign removal, existing post removal, and storage shall be included in the cost of sign resetting. Existing signs or posts that are damaged by the Contractor shall be replaced with no additional payment. The cost of sign removal, existing post removal, and all mounting hardware 440 necessary to attach th e existing sign to new posts, sha ll be included in the cost of the sign relocation. 802.12 The cost of concrete, reinforcement, stub, anchor bolts, conduit, and all necessary hardware shall be included in the cost of the support foundation. The cost of furnishing and applying aluminum-impregnated caulking compound and zinc chromate paint as required in 802.07, shall be included in the cost of the pay items in this section. 450 The replacement of posts damaged by th e Contractor’s activities shall be without additional payment. The cost of cutting the reinforcing bars and anchor bolts, furnishing the steel plate and welding the plate to the ends of the anchor bolts when cl ass X excavation is encountered shall be included in the cost of the pay items in this section. The cost of excavation, except for class X material, and necessary incidentals shall be included in the cost of the pay items in this section. 460
Source: Indiana Standard Specifications, 2024 Edition. Pages 916–922 of 1,248.