for Highway Construction Page 499 of 71 5 SECTION 616 – SIGNS, SIGN POSTS , AND SIGN ST RUCTURES
616.01 Description.
Provide and install signs, sign posts, sign structures, or reinstall signs or sign posts. Signs:
1.Type B Signs: Sheet Aluminum
a.Type B -1: Sheet Aluminum Sign
b.Type B -2: Sheet Aluminum Sign with LED border
c.Type B -3: Combination Sheet Aluminum and Changeable Message Sign
2.Type C Signs: Extruded Aluminum Panels
a.Type C -1: Extruded Aluminum Panel Sign
b.Type C -2: Combination Extruded Aluminum Panel Sign and Changeable Message Sign
3.Type E Signs: HDO Plywood
A.Steel Sign Posts:
1.Type A Sign Post : Wide Flange Post
a.Type A -1: W6x9 Wide Flange Post
b.Type A -2: W8x10 Wide Flange Post
c.Type A -3: W8x13 Wide Flange Post
d.Type A -4: W8x18 Wide Flange Post
e.Type A -8: W12x19 Wide Flange Post
f.Type A -9: W14x22 Wide Flange Post
2.Type B Sign Post : Steel Tube Post
a.Type B -2: 4x3 Steel Tube Post
b.Type B -3: 5x5 Steel Tube Post
c.Type B -4: 6x6 Steel Tube Post
3.Type E Sign Post : Perforated Steel Tube Post
a.Type E -1: 2x2 Perforated Steel Tube Post
b.Type E -2: 2½x2½ Perforated Steel Tube Post
B.Wood Sign Post
1.Type D Sign Post: Wood Post
a.Type D -1: 4x4 Wood Post
b.Type D -2: 4x6 Wood Post
c.Type D -3: 6x6 Wood Post
d.Type D -4: 6x8 Wood Post for Highway Construction Page 500 of 715 e. Type D -5: 8x8 Wood Sign Post
C.Overhead Sign Structures
1.Sign Bridge
2.Cantilever Sign Structure
3.Tee Sign Structure
616.02 Materials.
Provide materials as specified in: Structure Excavation and Compacting Backfill ............................................................................. 210 Concrete ....................................................................................................................................... 502 Metal Reinforcement .................................................................................................................... 503 Structural Metal s ........................................................................................................................... 504 Nonstructural Concrete ................................................................................................................. 509 Steel and Aluminum Sign Posts and Overhead Sign Structures ............................................. 708.17 Hardware for Signs .................................................................................................................. 708.18 Extruded Aluminum ................................................................................................................. 708.26 Sheet Aluminum ...................................................................................................................... 708.27 Wood Sign Posts ..................................................................................................................... 710.02 Plywood for Type E Signs ........................................................................................................ 712.01 Retroreflective Sheeting .......................................................................................................... 712.02 Silk Screen Opaque Inks ......................................................................................................... 712.07 Silk Screen Transparent Inks ................................................................................................... 712.08 Direct Applied Nonrefl ective Sheeting and Transparent Films ................................................. 712.09 Use Class 40A concret e for overhead sign structures as specified in 502 . Use Class 30 concrete for other sign support foundations as specified in 509. Submit a l ist of proposed materials for installation for approval.
616.03 Construction Requirements.
A.Signs.
1.Sign Types. Construct signs as follows:
a.Type B: Sheet aluminum with retroreflective sheeting background and a digitally pri nted, silk screened ink, or direct applied retroreflective or nonr eflective sheeting legend and border. Remove burrs and sharp edges after fabrication. Install on Type B, D, or E sign posts. for Highway Construction Page 501 of 715 b. Type C: Extruded aluminum panels with retroreflective sheeting background and a direct applied retroreflective or nonreflective legend and border. Use on multiple posts, or overhead sign structures . Install on Type A, B, or D sign posts.
c.Type E: ½ inch or ⅝ inch HDO plywood with retroreflective sheeting background and a digitally printed, silk -screened ink, direct applied retroreflective sheeting or nonreflective sheeting legend and border. Use ½ -inch thickness for signs sm aller than 96 inches by 48 inches. Use ⅝ - inch plywood for signs 96 inches by 48 inches or larger. Fill and sand voids in edges with wood filler then apply edge sealer.
2.Sign Sheeting. Apply sheeting and screen printing as follows:
a.Cleaning. Clean substrates, background sheeting, and film as recommended by the manufacturer before application of additional sheeting and films. Do not use cleaners that damage the surface.
b.Orientation. Orient retroreflective sheeting as recommended by the manu facturer.
c.Butt Splices. Use a maximum of 1 butt splice placed vertically or horizontally. Ensure 1/32 inch or smaller gap. Ensure the color and orientation of the sheeting match.
d.Cutting and Plotting. Provide letters, numbers, borders, and symbols with a smooth, regular outline.
e.Adherence. Ensure sheeting is free of cracks, discoloration, air pockets, and other flaws causing non-adherence.
f.Screen Printing. Screen print sign legends using transparent inks in accordance with the sheeting manufacturer’s matched component system (MCS). Provided screen- printed items with a uniform, and smooth, regular outline.
g.Retroreflectivity. Ensure the sheeting meets minimum MUTCD retroref lectivity requirements. Repair or replace devices found to be damaged or defective.
h.Pop Rivets. Pop rivets may be used to attach LOGO sign panels to a specific service sign. Pop rivets may be used to attach route shields to an existing highway sign .
i.Finish . Trim sheeting flush with the si gn edges. Wrap sheeting into sheeting grooves on extruded aluminum edges.
j.Storage and Transport . Store and ship finished signs with separation paper between the sign faces. Ensure no m ore than two (2) signs are stacked horizontally. Vertically store and ship when there are more than two (2) signs.
B.Sign Posts.
1.Steel Sign Post. Install breakaway features on steel sign posts. Ensure posts are pl umb.
2.Wood Sign Post. Construct sign post with proper breakaway features performed.
3.Foundation . Construct foundation and place, grade, and compact backfill and surfac e material.
C.Overhead Sign Structures .
1.Sign Structure. Construct sign bridges, cantilever sign structures , and tee sign structures. Submit plans and design calculations that are sealed by an Idaho licensed professional engineer. Ensure for Highway Construction Page 502 of 71 5 the sign structure is designed as detailed in the AASHTO LRFD Specifications for St ructural Supports for Highway Signs, Luminaires, and Traffic Signals as follows:
a.Risk Category: Typical.
b.Fatigue Category: 1. Before fabrication, submit shop drawings and design calculations for approval. Allow 10 business days for review and approval. Submit as -built shop drawings . Ensure welds are performed as specified in 504.03.M.
2.Foundations. Construct foundations and place, grade, and compact backfill and surface material. Where a foundation hole cannot be augured, construct a formed cylindrical or square foundation. If solid rock is encountered, drill and grout reinforcing steel into the rock when approved. Install anchor bolts plumb within 1 degree. Use 3 nuts and 2 washers on each anchor bolt, 1 leveling nut and 1 washer below the base plate, and 2 nuts and 1 washer above the base plate. Ensure leveling nuts with washer bear against the underside of the base plate before tightening the top nuts. Tighten the lower top nut beyond snug- tight as specified in Table 616.03- 1. Tighten the upper top nut against the lower top nut snug- tight. Ensure at least 3 threads of the anchor bolt are visible above the second nut. Tighten bolts that are not anch or rods as specified in
504.03 L.2. Place and compact backfill as specified in 210.
D.Special Sign Installation. Install signs mounted on bridges, traffic control signals, and other locations. Install brackets, mounting system, and hardware to attach sign.
E.Department Supplied Signs. Install signs supplied by the Department.
F.Reinstall Sign Face. Store and reinstall or relocate signs that were previously removed under 203. Protect signs during r emoval, transport, and storage to prevent damage. Ensure that no more than two signs are stacked horizontally . Vertically store and ship when there are more than two signs. Reinstall signs with new hardware on new or reinstalled posts under the appropriate pay items . Install sign brackets and braces if applicable.
G.Reinstall Sign Post . Store and reinstall or relocate posts that were previously removed under 203 . Protect posts d uring removal, transport, and storage to prevent damage. for Highway Construction Page 503 of 715 Reinstall posts on new foundations with breakaway base and hardware. Install new signs or signs to be reinstalled under the appropriate pay items .
H.Reinstall Assembly. When indicated, store and reinstall or relocate sign assemblies that were previously removed under 203 . Protect signs and posts during removal, transport, and storage to prevent damage. Ensure that no more than two signs are stacked horizontally. Vertically store and ship when there are more than two signs. Repair or replace damaged signs. Reinstall signs with new hardware and posts. Install sign brackets and braces if applicable. Installation of foundations and new hardware and breakaway base is incidental .
I.Special Sign Install . Mount signs in a manner other than ground- mounted. Provide appropriate steel brackets or mounting - systems and all applicable hardware to attach sign. All equipment, tools, hardware, and mounts are incidental .
J.Flashing Beacon Sign. Install all electrical components along with new sign. Posts and braces will be paid under appropriate items.
616.04 Method of Measurement.
The Engineer will pay contract unit prices for acceptable quantities as follows:
1.Signs will be by the square- foot. Triangular si gns will be by the triangular area. Other sign shapes will b e by the rectangular area encompassing the sign panel.
2.Steel sign posts, including foundations and breakaway devices will be by the foot. Wood posts, including breakaw ay features, will be by the foot.
3.Sign brackets and braces are measured by the pound, exclusive of galvanizing.
4.Overhead sign structures , including foundations, will be per each.
5.Special Install Sign will be by the each and includes all applicable mounting hardware and brackets required for the sign installation.
6.Adjust Sign Structure Brackets will be paid by each sign face. Expect multiple brackets for adjustment per sign.
7.Reinstalled sign faces will be per each sign face.
8.Reinstalled sign posts, including new foundations and hardware, will be per each sign post .
616.05 Basis of Payment .
The Department will pay for acceptable quantities at the contract unit prices as follows: Pay Item Pay Unit Sign, Type ____ ..................................................................................... SF Sign Braces ............................................................................................ lb Sign Brackets ......................................................................................... lb for Highway Construction Page 504 of 715 Steel Sign Post, Type ___ ...................................................................... ft Wood Sign Post, Type ___ ..................................................................... ft Overhead Sign Structure, Type ____ ..................................................... Each Special Install Sign ................................................................................ Each Reinstall Sign Face ................................................................................ Each Reinstall Sign Post ................................................................................ Each Hardware for mounting and assembly is incidental to steel or wood posts. Foundations for reinstalled sign posts are incidental to reinstalled sign posts. Installation of State supplied signs are incidental to sign posts. Covering and uncovering signs will be at no additional cost to the Department. for Highway Construction Page 505 of 715 SECTION 617 – DELINEATOR AND MILEPOST ASSEMBLIES
617.01 Description.
Provide and install delineator and milepost assemblies .
617.02 Materials.
Provide materials as specified in: Nonstructural Concrete ................................................................................................................. 509 Rigid Posts for Delineators, Snow Poles , and Milepost s ......................................................... 708.16 Sheet Aluminum ...................................................................................................................... 708.27 Retroreflective Sheeting .......................................................................................................... 712.02 Silk Screen Opaque Inks ......................................................................................................... 712.07 Silk Screen Transparent Inks ................................................................................................... 712.08 Flexible Posts for Delineators .................................................................................................. 712.10 Delineators may have rigid or flexible posts. Use rigid posts if snow poles will be installed. Use Class 30 concrete .
617.03 Construction Requirements.
Set delineators and mileposts plumb. Submit the manufacturer’s written installation instructions for flexible delineator posts. If the milepost location is within 50 feet of an established delineator , remove the delineator.
A.Delineator Assemblies . Delineator types 1, 2, 3, or 4 consist of a delineator post and a delineator. Delineator type 9 assemblies vary in shape and may be attached to concrete barrier, to guardrail posts, or to W-beam guardrail. Attach in accordance with the manufacturer’s written installation instructions. Submit the manufacturer’s written instructions before installation. Attach sheet alumi num with retroreflective sheeting to rigid posts. Attach retroreflective sheeting to flexible posts. Use Type IV or higher retroreflective sheeting.
B.Milepost Assembly. A milepost assembly consists of a concrete foundation , post , and milepost sign. If a precast foundation is used, dig the foundation hole to a dimension larger than the concrete foundation and then backfill and tamp using approved material.
617.04 Method of Me asurement.
The Engineer will measure acceptably completed work per each.
617.05 Basis of Payment .
The Department will pay for acceptable quantities at the contrac t unit prices as follows:
Source: Idaho Standard Specifications for Highway Construction, 2023 Edition. Pages 535–540 of 768.