Overhead Sign Structures Art. 733.04 SECTION 731. BASE FOR TELESCOPING STEEL SIGN SUPPORT
731.01 Description. This work shall consist of furnishing and installing a
base for a telescoping steel sign support.
731.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Base for Telescoping Sign Support ................................................... 1093.02
b.Hardware (Note 1) ......................................................................... 1006.29(d) Note 1. The anchor bolts, nuts, and washers shall be stainless steel.
731.03 Method of Measurement. Each base will be measured for payment
as an individual unit complete in place.
731.04 Basis of Payment. This work will be paid for at the contract unit price
per each for BASE FOR TELESCOPING STEEL SIGN SUPPORT. SECTION 732. RESERVED SECTION 733. OVERHEAD SIGN STRUCTURES
733.01 Description. This work shall consist of fabricating, furnishing, and
erecting overhead sign structures, including supports, on previously prepared foundations.
733.02 Materials. Materials shall be according to the following.
Item Article/Section
a.High Strength Steel Bolts, Nuts, and Washers .............................. 1006.08(b)
b.Fabric Bearing Pads ............................................................................... 1082
c.Overhead Sign Structures ...................................................................... 1094 CONSTRUCTION REQUIREMENTS
733.03 Drawings. Two sets of shop fabrication drawings for each overhead
sign structure shall be submitted to the Engineer for approval according to
Article 505 — 03.
733.04 Fabrication. Structural steel shall be fabricated and inspected
according to the applicable portions of Articles 505.04 and 505.05. Aluminum shall be fabricated according to Article 1094.05 and the following. Thermal cutting will not be permitted. Holes and cuts in extruded alloys shall be made by mechanical methods (drilled, sawed, machined). All holes in castings or forgings shall be drilled from solid or formed and reamed for final fit. Damage to Art. 733.05 Overhead Sign Structures exposed aluminum surfaces producing an objectionable appearance, in the opinion of the Engineer, shall be cause for rejection. Cast or forged parts shall have all fins, flash, runner or riser remnants, or other irregularities removed. Tubing shall be seamless and uniform in quality and temper. Exterior and interior surfaces shall be clean, smooth, and free from slivers, laminations, cracks, or other defects.
733.05 Surface Treatment of Structural Steel Supports. Structural steel
supports shall be hot-dip galvanized according to AASHTO M 111 (M 111M) after fabrication is completed.
733.06 Erection. Erection of all structural steel and structural aluminum shall
be according to the applicable requirements of Article 505.08. High strength bolts, nuts, and washers shall be assembled and tightened according to Article 505.04(f)(2).
733.07 Re-using Existing Foundations. When re-using existing
foundations, the exposed portion of the existing anchor bolts shall be blast cleaned and coated. Sand blasting shall be according to SSPC-SP10/NACE No. 2. The coating shall consist of two coats of a paint containing zinc dust according to ASTM A 780. The waiting period between the two coats of paint shall be according to the paint manufacturer’s recommendations. The Contractor shall be responsible for field verifying the existing locations, elevations, and dimensions of the existing foundation, structural steel support anchor bolts, structural steel support height, and superstructure span length prior to fabrication of any materials. The Contractor shall furnish and install new anchor bolt leveling nuts, locknuts, and washers.
733.08 Wire Cloth. The void between the base plate and the foundation shall
be enclosed according to the following requirements. A stainless steel mesh 1/4 in. (6 mm) maximum opening with a minimum wire diameter of AWG No. 16 (1.5 mm) with a minimum 2 in. (50 mm) lap shall be installed to enclose the void between the base plate and the foundation. The stainless steel screen wire shall be formed to the shape of the base plate and fastened to the base plate with 3/4 in. (19 mm) stainless steel banding. The screen wire shall overlap and be fastened with a ring type connection.
733.09 Field Painting. Field painting for all exposed steel surfaces not
galvanized shall be done according to the plans and the requirements of Section 506.
733.10 Method of Measurement. This work will be measured for payment as
follows.
a.Sign Structure - Span, Monotube, Cantilever, or Butterfly. Span and monotube sign structures will be measured for payment in feet (meters) from center to center of supports. Cantilever and butterfly sign structures will be measured for payment in feet (meters) from end of the unsupported end(s) to center of the support as shown on the plans. For steel or aluminum, three dimensional space frame trusses, measurement will include the truss inspection grating inside the truss. 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
Referenced in this section
Sections that cite this one
OVERHEAD SIGN STRUCTURES in other states
Get an email when 733 changes
Illinois revises spec sections through supplementals and new editions. We check this one every week and email you the day it changes. Free, no account.
Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 662–664 of 1,217. View official source ↗