Concrete Foundations for Sign Structures Art. 734.03
b.Sign Structure - Bridge Mounted. Bridge mounted overhead sign structures will be measured for payment in feet (meters) of the overall length of the walkway.
c.Sign Structure Walkway. The sign structure walkway will be measured for payment in feet (meters) of the overall length of the walkway, end to end.
733.11 Basis of Payment. This work will be paid for at the contract unit price
per foot (meter) for OVERHEAD SIGN STRUCTURE - SPAN, CANTILEVER, BUTTERFLY, or MONOTUBE, of the type specified; OVERHEAD SIGN STRUCTURE - WALKWAY, of the type specified; or OVERHEAD SIGN STRUCTURE - BRIDGE MOUNTED. Structural steel supports will not be paid for separately, but shall be included in the contract unit price for overhead sign structure, of the type specified. SECTION 734. CONCRETE FOUNDATIONS FOR SIGN STRUCTURES
734.01 Description. This work shall consist of constructing a foundation for
structural steel sign supports and overhead sign structures.
734.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Portland Cement Concrete ..................................................................... 1020
b.Grounding Electrodes .................................................................... 1087.01(b)
c.Anchor Rods ...................................................................................... 1094.02
d.Reinforcement Bars ....................................................................... 1006.10(a) CONSTRUCTION REQUIREMENTS
734.03 Installation. Concrete foundations of the type and size specified in
the plans, shall be constructed according to the applicable requirements of Section 503 and the following. Grounding electrodes shall be installed according to Section 806. The anchor rods shall be firmly held in position by a template during the placing of the concrete.
a.Spread Footing for Overhead Sign Structures. The footings shall be constructed according to the applicable requirements of Article 503.13. Conduit, when specified, shall be installed rigidly in place before the concrete is deposited. The top 4 in. (100 mm) of backfill material shall be topsoil suitable for seeding. Backfill shall be placed around the footing prior to raising the structural steel support frames. It shall be placed in 4 in. (100 mm) lifts and shall be compacted to not less than 90 percent of the standard laboratory density Art. 734.03 Concrete Foundations for Sign Structures according to Illinois Modified AASHTO T 99 (Method C). Care shall be taken to prevent damage to the concrete. Backfill shall be brought level to the finished ground line. All areas disturbed by the Contractor's operations shall be seeded according to Section 250. The top of the footing shall be finished level, and all exposed surfaces shall be finished according to Article 503.15(a).
b.Drilled Shaft Foundations for Overhead Sign Structures. Drilled shaft foundations shall be according to Section 516 and the following. When obstructions are encountered, the Contractor shall request to relocate the foundation. Any abandoned holes shall be backfilled to the satisfaction of the Engineer.
c.Concrete Foundations for Ground-Mounted Sign Supports. The top segment of these foundations shall be finished according to Article 503.15(a) and formed down to a depth of at least 1 ft (300 mm) below the ground line, and the concrete shall be finished level at the ground line. Concrete shall be cured before sign supports and overhead sign structures are installed.
734.04 Method of Measurement. This item will be measured for payment
according to Article 503.21. Excavation in rock will be measured for payment according to Article 502.12.
734.05 Basis of Payment. This work will be paid for at the contract unit price
per cubic yard (cubic meter) for CONCRETE FOUNDATIONS, or DRILLED SHAFT CONCRETE FOUNDATIONS. Excavation in rock will be paid for according to Article 502.13. Obstruction mitigation or abandoned foundation excavations and backfill will be paid for according to Article 109.04. SECTION 735. REMOVE AND RELOCATE OVERHEAD SIGN STRUCTURE OR GROUND MOUNTED SIGN SUPPORT
735.01 Description. This work shall consist of removing an overhead sign
structure and installing it on another previously prepared foundation using either the existing structural steel supports or new structural steel supports; or removing a ground mounted sign support and installing it on another previously prepared foundation. CONSTRUCTION REQUIREMENTS
735.02 Removal and Relocation. Removal and relocation shall be according
to the following. Remove Overhead Sign Structure Art. 736.03
a.Overhead Sign Structure. The complete horizontal superstructure, including walkways when present, shall be removed from the structural steel support(s), and the structural steel support(s) removed from the foundation(s). The overhead sign structure shall then be transported to its new location and erected according to Section 733, using new hardware. When necessary, the overhead sign structure shall be stored according to
Article 505 — 08(c). When new structural steel supports are required, they
shall be constructed according to Section 733 and the details shown on the plans.
b.Ground Mounted Sign Supports. Each support shall be removed from the foundation, transported to its new location, and erected according to Section 727 using new mounting hardware.
735.03 Basis of Payment. This work will be paid for at the contract unit price
per each for REMOVE OVERHEAD SIGN STRUCTURE – SPAN, CANTILEVER, BUTTERFLY, or MONOTUBE; RELOCATE STRUCTURAL STEEL SUPPORT FOR OVERHEAD SIGN STRUCTURE - SPAN, CANTILEVER, BUTTERFLY, or MONOTUBE; RELOCATE OVERHEAD SIGN SUPERSTRUCTURE - SPAN, CANTILEVER, BUTTERFLY, or MONOTUBE; or REMOVE AND RELOCATE GROUND MOUNTED SIGN SUPPORT. When required, new structural steel supports for an overhead sign structure will be paid for according to Article 738.03. SECTION 736. REMOVE OVERHEAD SIGN STRUCTURE
736.01 Description. This work shall consist of removing an overhead sign
structure. CONSTRUCTION REQUIREMENTS
736.02 General. The entire overhead sign structure, including supports,
superstructure, sign panels, sign lighting, and walkway shall be removed from the foundation(s) and removed from the right-of-way. The removed structure shall be disposed of according to the contract. When the contract specifies re-using the existing foundations, the Contractor shall exercise care to not damage the existing anchor bolts that will be re-used to install the new structural steel supports. Methods of removing anchor bolt nuts, such as penetrating fluid, sandblasting, or scoring and cracking the anchor bolt nuts, shall be approved by the Engineer. Under no circumstances will heat be allowed. When grout exists in the void between the existing base plate and the foundation, the grout shall be completely removed down to the top surface of the original foundation.
736.03 Basis of Payment. This work will be paid for at the contract unit price
per each for REMOVE OVERHEAD SIGN STRUCTURE - SPAN, CANTILEVER, BUTTERFLY, MONOTUBE, or BRIDGE MOUNTED.
Referenced in this section
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Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 664–666 of 1,217. View official source ↗