NPS Uniguide Signs Manual Attachment - Motorist-Guide-Fabrication-Details.pdf
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- 693C73-24-B-000016
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This document provides fabrication details and specifications for motorist guidance signs to be used in National Park Service facilities. It covers the requirements for extruded aluminum sign panels with metal or wood posts, including dimensions, materials, reflective vinyl graphics, breakaway post components, and attachment details. The document contains multiple detailed drawings and specifications for the various sign components and assembly methods.
The related federal contract opportunity is for the rehabilitation of the Cosby Entrance Road and Cosby Picnic Area Road at Great Smoky Mountains National Park in Tennessee. The project, with an estimated value between $2,000,000 to $5,000,000, consists of asphalt paving, drainage improvements, sign replacement, pavement markings, and other related work. The solicitation will be open only to certified small business concerns, with bid documents to be issued on or about July 29, 2024.
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Motorist Guidance Sign Fabrication Details
National Park Service June 2022
NPS Sign Program Harpers Ferry Center
Interpretive Design Center Harpers Ferry, WV 25425
304-535-4069
Note: All motorist guidance signs and breakaway post components shall be fabricated and installed per federal and local Department of Transportation standards and specifications where applicable.
National Park Service | Harpers Ferry Center | Media Development | Signs
Project Number
Drawing Date Page
Description | Notes
Scale:
MG 1.0
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 Not to Scale
Extruded Aluminum Sign with Metal Posts National Park Service
2-D1.0 NPS Standard Extruded Aluminum Sign Back Elevation
1-D1.0 NPS Standard Extruded Aluminum Sign Fabrication
With Metal Posts
Edge Strip Painted to Match NPS Brown
Post Clamp Hardware
W6x12 Galvanized Steel I-Beam Post with Breakaway Components
1-D1.0B
1-D1.0D
1-D1.0E
GL
D ep en d in g o n Si g h t Li n es a n d L o ca l C o d es an d
C o n d it io n s
W6x12 Steel I-Beam Post Or Local DOT Equivalent
Perforated Fuse Plate
Breakaway Base Plate and Stiffener Plate
Welded to Post
Footer Engineering and Depth as Required for
Structural Integrity and Per State and Local Codes
NPS Brown Matthews Paint MP63848 PMS Black 4
Back Painted to Match NPS Brown
Extruded Aluminum Panels. Panel background, type, graphics, and borders to be Type III or IV High Intensity Reflective Vinyl Computer-cut or Digitally Printed.
FHWA Brown Panel background.
White Type, Graphics, and Border.
Drawing Date Page
Description | Notes
Scale:
MG 1.1
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 As Indicated
Extruded Aluminum Sign with Metal Posts National Park Service
12"
2"
2"
High Intnsity Type III or IV Reflective Vinyl Wrap
Note: Overlay extend approx. 3/8" over each side in the narrow direction and shall be adhered to the panel.
Stitch Bolts @ 24" O.C.
Post Clip
Slotted Hole 7/16" x 7/8"
Sign Panel
Slotted Holes Drilled 12" O.C.
End Holes 6" From Ends of Panel
Panel
3/8" Diameter 16 UNC x 1 3/4"
Bolt Lock Nut and Washer
Retro-Reflective Vinyl Wrap
Extruded Aluminum Full Panel
Extruded Aluminum Half Panel
6" 3-D1.0A Slotted Hole Detail - Plan View
Scale: 1" = 1' - 0"
First Slots in from both edges are bolted. Remaining slots are typically spaced 12" O.C.
2-D1.0A Sign Panel Assembly - Side Section Cut
Scale: 3" = 1' - 0"
1-D1.0A Typical Extruded Aluminum Panel Elevations
Scale: 1/2 Actual Size
6" 12" 12"
Drawing Date Page
Description | Notes
Scale:
MG 1.2
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 Not to Scale
Extruded Aluminum Sign with Metal Posts National Park Service
Sign Panel
Stainless Steel or Aluminum Size #6 x 1/2"
Slotted Pan Head Screws @ 24" C.C.
or 1/8" S.S. Blind
Rivets
Sign Panel
Aluminum Edge Strip
1-D1.0B Panel-Post Attachment Detail 2-D1.0B Edge Strip Detail - Top Section Cut
Note: An additional 1-1/2" shall be added to panel width dimension to accommodate for edge strip overhang.
3/4"
2"
Post Clamp
3/8" Square Head Bolt with Flat Washer and Self Locking Nut
W6x12 Galvanized Steel I-Beam Post
Compression Washer
Z-Bar Mounting Rail with Drilled Mounting Slots
Drawing Date Page
Description | Notes
Scale:
MG 1.3
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 Full Scale
Extruded Aluminum Sign with Metal Posts National Park Service
1-D1.0C Post Clip Plan View 3-D1.0C Alternative Post Clip Plan View
1.0" 0.25" 0.625"
1.875" 0.5"
1.0" 0.36" 1.312"
1.594"
1.484"
0.188"
0.312" 1.0"
0.312"
5/8" 15/16"
1 9/16"
3/16"
11/32"
5/16"
11/32"
1"
1/8"
7/16"
1"
5/16"
1/8"
0.378" 7/8" diam.
plus draft3/16"
1/16"
1"
1/16"
7/16" diam.
7/16" x 11/16" Slotted Hole
Note: Centerline of hole for 3/8" diameter square head bolt x 2 1/4" long with a flat washer and hex nut. Bolt head dimensions shall be in accordance with ANSI B 18.2.1 as referred to in the AISC manual of steel construction. Bolt assembly shall be galvanized.
Beam flange of W shapes:
7/16" leg of clamp toward W shapes 15 lbs/ft. and greater
Beam flange of W and S shapes:
5/16" leg of clamp toward W and S shapes 12 lbs/ft. and less
Post clamp to be ASTM B26 or B108 cast Aluminum alloy 356.0-T6 (.173 lbs each)
2-D1.0C Post Clip Elevation 4-D1.0C Alternative Post Clip Elevation
Drawing Date Page
Description | Notes
Scale:
MG 1.4
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 Not to Scale
Extruded Aluminum Sign with Metal Posts National Park Service
4"
1-D1.0D Post Fuse Plate Connection
Note: Parts shall be saw cut either before galvanizing and the galvanized cut cleaned of zinc build-up, or saw cut after galvanizing and the cut surface.
2-D1.0D Fuse Plate Detail
W6x12 Galvanized Steel I-Beam Post
Galvanized Steel Perforated Fuse Plate
1/2"-13 Bolt with Beveled Washers
1"
1"
4 1/4"
1" 1" 1"
1 1/8" 1 1/8"
Drawing Date Page
Description | Notes
Scale:
MG 1.5
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 Not to Scale
Extruded Aluminum Sign with Metal Posts National Park Service
1-D1.0E Breakaway Post Detail
2-D1.0E Post Top Section Cut
4-D1.0E Bolt Keeper Plate Detail 3-D1.0E Stiffener Plate Detail
2-D1.0E
W6x12 Galvanized Steel I-Beam Post
Galvanized Steel Stiffener Plate Welded to Post
Galvanized Steel Breakaway Base Plate Welded to Post
High Strength Hex Head Bolt with Hex Head Nut and Three
(3) Washers
Bolt Plate Keeper
8 1/2"
10"
8 1/2"
10"
1/2"4"
1 1/8"
2 3/4"
1 1/8"
5"
1 1/8"
2 3/4"
1 1/8"
5" 3/4"
5"
3/4"
2"
1/2"
1/2"
2" 6" 2"
Drawing Date Page
Description | Notes
Scale:
MG 2.0
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 Not to Scale
Extruded Aluminum Sign with Wood Posts National Park Service
NPS Brown Matthews Paint MP63848 PMS Black 4
6x8 Wood Posts Painted to Match NPS Brown
Breakaway or Frangible Coupling as Required by
State and Local Codes
Footer Engineering and Depth as Required for
Structural Integrity and Per State and Local Codes
GL
D ep en d in g o n S ig h t Li n es a n d L o ca l C o n d it io n s
1/4" Thick Aluminum Mounting Angles Painted to Match NPS Brown, Matthews Paint MP63848
1-D2.0C
1-D2.0 NPS Standard Extruded Aluminum Sign Fabrication
With Wood Posts
2-D2.0 NPS Standard Extruded Aluminum Sign Elevation
Double or Triple Post - Panels Wider Than 48"
Panels 96" and Wider Require Three (3) Posts
Edge Strip Painted to Match NPS Brown
Back Painted to Match NPS Brown
Extruded Aluminum Panels. Panel background, type, graphics, and borders to be Type III or IV High Intensity Reflective Vinyl Computer-cut or Digitally Printed.
FHWA Brown Panel background.
White Type, Graphics, and Border.
6x8 Wood Posts Painted to Match NPS Brown with Breakaway or Frangible Coupling
Drawing Date Page
Description | Notes
Scale:
MG 2.1
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 Not to Scale
Extruded Aluminum Sign with Wood Posts National Park Service
GL
1-D3.0C
D ep en d in g o n S ig h t Li n es a n d L o ca l C o n d it io n s
4x4 Wood Posts Painted to Match NPS Brown
Breakaway or Frangible Coupling as Required by
State and Local Codes
Footer Engineering and Depth as Required for
Structural Integrity and Per State and Local Codes
GL
2-2.0A Breakaway Wood Post Detail
18"
4"
1-1/2” x 1/2” Breakaway Slot Note: Slot goes through Entire Depth of Post
Drawing Date Page
Description | Notes
Scale:
MG 2.2
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 As Indicated
Extruded Aluminum Sign with Wood Posts National Park Service
1-D2.0B Typical Extruded Aluminum Panel Elevations
Scale: 1/2 Actual Size
12"
2"
2"
Retro-Reflective Vinyl Wrap
Note: Overlay extend approx. 3/8" over each side in the narrow direction and shall be adhered to the panel.
Stitch Bolts @ 24" O.C.
Post Clip
Slotted Hole 7/16" x 7/8"
Sign Panel
Slotted Holes Drilled 12" O.C.
End Holes 6" From Ends of Panel
Panel
3/8" Diameter 16 UNC x 1 3/4"
Bolt Lock Nut and Washer
Retro-Reflective Vinyl Wrap
Extruded Aluminum Full Panel
Extruded Aluminum Half Panel
6"
3-D2.0B Slotted Hole Detail - Plan View
Scale: 1" = 1' - 0"
First Slots in from both edges are bolted. Remaining slots are typically spaced 12" O.C.
2-D2.0B Sign Panel Assembly - Side Section Cut
Scale: 3" = 1' - 0"
6" 12" 12"
Drawing Date Page
Description | Notes
Scale:
MG 2.3
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 Not to Scale
Extruded Aluminum Sign with Wood Posts National Park Service
4" x 4" x 1/2" Thick Continuous Aluminum Angle Mounted to Post, Paint Same Color as Post
1/2"-13 Round Head, Square Neck Galvanized
Steel Carriage Bolt Post Clip
Sign Panel
3/8" Diameter 16 UNC x 1 3/4" Bolt Lock Nut and Washer Stainless Steel or Aluminum Size #6 x 1/2"
Slotted Pan Head Screws @ 24" C.C.
or 1/8" S.S. Blind
Rivets
Sign Panel
Aluminum Edge Strip
1-D2.0C Panel-Post Attachment Detail 2-D2.0C Edge Strip Detail - Top Section Cut
Note: An additional 1-1/2" shall be added to panel width dimension to accommodate for edge strip overhang.
3/4"
2"
Drawing Date Page
Description | Notes
Scale:
MG 2.4
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 Full Scale
Extruded Aluminum Sign with Wood Posts National Park Service
1-D2.0D Post Clip Plan View 3-D2.0D Alternative Post Clip Plan View
2-D2.0D Post Clip Elevation 4-D2.0D Alternative Post Clip Elevation
1.0" 0.25" 0.625"
1.875" 0.5"
1.0" 0.36" 1.312"
1.594"
1.484"
0.188"
0.312" 1.0"
0.312"
5/8" 15/16"
1 9/16"
3/16"
11/32"
5/16"
11/32"
1"
1/8"
7/16"
1"
5/16"
1/8"
0.378" 7/8" diam.
plus draft3/16"
1/16"
1"
1/16"
7/16" diam.
7/16" x 11/16" Slotted Hole
Note: Centerline of hole for 3/8" diameter square head bolt x 2 1/4" long with a flat washer and hex nut. Bolt head dimensions shall be in accordance with ANSI B 18.2.1 as referred to in the AISC manual of steel construction. Bolt assembly shall be galvanized.
Beam flange of W shapes:
7/16" leg of clamp toward W shapes 15 lbs/ft. and greater
Beam flange of W and S shapes:
5/16" leg of clamp toward W and S shapes 12 lbs/ft. and less
Post clamp to be ASTM B26 or B108 cast Aluminum alloy 356.0-T6 (.173 lbs each)
Drawing Date Page
Description | Notes
Scale:
MG 3.0
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 Not to Scale
0.125 Aluminum Sign with Wood Posts
National Park Service
NPS Brown Matthews Paint MP63848 PMS Black 4
4x6 Wood Posts Painted to match NPS Brown with Breakaway or Frangible Coupling
2-D3.0 Breakaway Wood Post Detail
3-D3.0 NPS Standard .125 Aluminum Sign Front and Side Elevations
18"
4"
1-1/2" x 1/2" Breakaway Slot Note: Slot goes through Entire Depth of Post
4x6 Wood Posts Painted to Match NPS Brown
Breakaway or Frangible Coupling as Required by
State and Local Codes
Footer Engineering and Depth as Required for
Structural Integrity and Per State and Local Codes
1/4" Thick Aluminum Continuous “Z-Bar” Mounting Rail, Painted to Match NPS Brown
.125 Aluminum Sign Panel with 3/8" Radius Corners, Panel Back Painted to Match NPS Brown
White, Type III/IV High Intensity Reflective Vinyl to Aluminum Panel
FHWA Recreation Brown Translucent Overlay Film with Compute-Cut or Digitally Printed Graphics
Line of T-Bar Extrusion Back Welded to Panel Every 12" O.C.
For Support
Panels 96" Wide Require Three (3) Posts
1-D3.0C
1-D3.0B
GL
D ep en d in g o n S ig h t Li n es a n d L o ca l C o n d it io n s
1-D3.0 NPS Standard .125 Aluminum Sign Fabrication
Drawing Date Page
Description | Notes
Scale:
MG 3.1
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 As Indicated, otherwise Not to Scale
0.125 Aluminum Sign with Wood Posts
National Park Service
Varies Based on Sign Size, See Chart A
1/2"-13 Round Head, Square Neck Galvanized Steel Carriage Bolt with Flat Washer and Hex Nut (Bolt Length Based on Post Size)
4x6 Breakaway Timber Post Painted to Match NPS Brown
1/4" Thick Aluminum Continuous “Z-Bar”Mounting Rail, Paint to Match NPS Brown
2"
4" 1/4"-20 x 1" Length Large Diameter Round Head 18-8 Stainless Steel Slotted Machine Screw with Washer and Hex Nut Note: High Bond Adhesive Tape
Along Entire Length of Rail
.125 Aluminum Sign Panel with 3/8" Radius Corners, Panel Back Painted to Match NPS Brown, Matthews Paint MP63848
Panel Width
60" or smaller
62"– 70"
72"– 94"
96"
Post Inset to Panel Edge
6"
8"
10"
12"
1-D3.0B Panel-Post Attachment Detail - Top Section Scale: 3” = 1’-0”
1-D3.0A Typical .125 Aluminum Panel Details
Single Sheet, Four (4) Mounting Holes
Chart A
U p t o
8"
5" 5"
Up to 96"
4" 4" 3/8" Radius Corners (Typ)
5/16" Mounting Holes (Typ)
Panel Back Painted To Match NPS Brown (Typ)
Drawing Date Page
Description | Notes
Scale:
MG 3.2
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 3” = 1’-0”
0.125 Aluminum Sign with Wood Posts
National Park Service
1/4" Thick Aluminum Continuous “Z-Bar” Mounting Rail, Paint to Match NPS Brown
.125 Aluminum Sign Panel with 3/8" Radius Corners, Panel Back Painted to Match NPS Brown
1" x 1" x 1/8" Thick Aluminum Continuous “T-Bar” Extrusion, Back Welded to Panel For Support
6 1/4"
5" 3 3/4"
5"
Note: Very High Bond Adhesive Tape Along Entire Length of Rail
5/16" Diameter Hole to Accept 1/4"-20 Screw
9/16" Diameter Hole to Accept
1/2"-13 Bolt
2 1/2" 2 1/2"
3"
1 1/4"1 1/4"1 1/4"1 1/4"
1"
6 1/2"
1-D3.0C Aluminum Sign Side Section
Note: Panel Back, Z-Bar Mounting Rails, and T-Bar Extrusions Painted to Match NPS Brown, Matthews Paint MP63848
2-D3.0C “Z-Bar” Mounting Rail Detail
1/2"-13 x 7 1/2" Long, Round Head, Square Neck Galvanized Steel
Carriage Bolt with Flat Washer and
Hex Nut
4x6 Breakaway Timber Post Painted to Match NPS Brown
1/4"-20 x 1" Long Large Diameter
Round Head 18-8 Stainless Steel
Slotted Machine Screw with Washer and Hex Nut
Drawing Date Page
Description | Notes
Scale:
MG 4.0
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 Not to Scale
0.080 Aluminum Sign with Wood Posts
National Park Service
NPS Brown Matthews Paint MP63848 PMS Black 4
GL
D ep en d in g o n S ig h t Li n es a n d L o ca l C o n d it io n s
4x4 Wood Posts Painted to Match NPS Brown, Matthews Paint MP63848
Breakaway or Frangible Coupling as Required by
State and Local Codes
Footer Engineering and Depth as Required for
Structural Integrity and Per State and Local Codes
2-D4.0A
2-D4.0 NPS Standard .080 Aluminum -Sign Elevations
For Panels up to 36"
1-D4.0 NPS Standard .080 Aluminum Fabrication
For Panels Up To 36" Wide
4x4 Wood Posts Painted to match NPS Brown with Breakaway or Frangible Coupling
.080 Aluminum Sign Panel with 3/8" Radius Corners, Panel Back Painted to Match NPS Brown
White, Type III/IV High Intensity Reflective Vinyl to Aluminum Panel
FHWA Recreation Brown Translucent Overlay Film with Compute-Cut or Digitally Printed Graphics
Drawing Date Page
Description | Notes
Scale:
MG 4.1
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 As Indicated, otherwise Not to Scale
0.080 Aluminum Sign with Wood Posts
National Park Service
2-D4.0A Panel Post Attachment Detail
Scale: 3" = 1' - 0"
3-D4.0A .080 Aluminum Panel Details
Scale: 3/4" = 1' - 0"
3" 3"
3" 3" eq eq
3/8" Radius Corners (Typ)
5/16" Mounting Holes (Typ)
.080 Aluminum Sign Panel
1/4"-20 x 5" Long Galvanized Steel
Carriage Bolt with Washer and Nut
4x4 Breakaway Timber Post Painted to Match NPS Brown
Panel Back Painted To Match NPS Brown (Typ)
Up to 36"
Drawing Date Page
Description | Notes
Scale:
MG 5.0
Motorist Guidance Sign Fabrication Details
NPS_HFC_MG
June 2022 Full Scale
Changeable Panel and C-Channel Extrusion Detail National Park Service
1-D3.0D Road Guide with Changeable Panel
2-D3.0D Changeable Panel Detail
Aluminum J-Channel Extrusion to hold .080” Aluminum Panel Note: Extrusion shall be Drilled and Countersunk to Accept 10-32 Flat Screws, Paint to Match Panel Background
10-32 -3/8" 316 Stainless Steel Flat Head, Phillips Machine Screw with Matching Nut and Washer
1/4" x 1/2" Galvanized Steel Carriage Bolt with Matching Nut and Washer
.080" Aluminum Panel Insert with Double-sided Graphics
.125 or .080 Aluminum Sign Panel
2-D3.0D
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