Attachment_B_Fabrication_Details_0001.pdf

Fabrication Details Channel Islands National Park

Santa Rosa, Santa Barbara, & San Miguel Islands May 2023

0909-807-CHIS

NPS Sign Program Harpers Ferry Center

Harpers Ferry, WV 25425

Structure drawings are for design-intent only. Contractor shall determine and engineer final fabrication details, which shall fulfill the required function while honoring the appearance of the drawings and provide shop drawings for approval by COR.

Graphics shall be printed on solid 0.080” thickness heat-treated aluminum providing minimal expansion or contraction in temperature extremes and resistant to corrosion and deterioration over the required life of the sign. Other applications, like pressure sensitive, adhesive-backed vinyl or laminates are not acceptable.

Panel edges must be slightly eased and sanded smooth to avoid sharp edges and allow for improved graphics adhesion. All corners are to be rounded to a 3/8” radius.

The base aluminum panel shall be coated on all sides to form a protective barrier and for graphics adhesion. Printing shall be 4 color process using UV resistant inks applied directly onto the coated aluminum. Printing must be at or above 300 dpi. Ink saturation must be uniform with no streaking.

Individual passes of the print head shall not be visible.

Panel edges and backs are to be painted or otherwise treated to match PMS Warm Gray

2. There is to be no bare aluminum exposed on signs once installed to posts.

Panel backs are to be labeled with a removable sticker displaying the panel’s corresponding drawings number.

Printed graphics shall be protected with top coating(s) displaying a matte �nish and containing UV inhibitors to protect graphics from fading and resist vandalism. Protective coating(s) shall be fused and bonded with the graphic inks and base substrate using a thermal curing process to form a durable hydrophobic barrier, protecting the graphics from gra�ti, salt, moisture intrusion, extreme weather and temperature changes, as well as serving as a �rst defense against vandalism.

The sign surface shall facilitate easy removal of gra�ti without damaging the sign’s surface when utilizing the recommended gra�ti removal process.

The sign panels shall be highly durable with a minimum 2-year warranty covering fading, cracking, peeling, blistering, and/or delamination. There shall be no warranty requirement for an annual application of a water sealant and no exclusions for extreme weather temperatures.

All sign panels shall be manufactured in the United States.

The contractor must supply all mounting hardware. Panels will mount using one of the following 4 mounting systems: mounting holes and hardware to mount to existing structure, mounting holes and hardware to mount to Corten steel sign post (contractor to supply post), VHB tape to mount to existing structure, or cleats mounted to the panel back to mount to existing structure.

Panels that require mounting holes shall receive 1/4” mounting holes in the locations shown in drawings. Hole locating marks should not be printed on panels.

Panels to mount by VHB tape shall have tape applied to the panel back by the contractor.

For signs requiring cleat mounts, the contractor will design and fabricate the cleat mount and supply all necessary hardware.

Hardware must be stainless steel. Cleat to be powdercoated to match PMS Warm Gray 2.

Hardware must not pass through panel front for cleat-mount signs.

National Park Service | Harpers Ferry Center | NPS Sign Program A.0

Channel Islands National Park

Description | Notes

VIS - Pedestrian Directional

Project Number

0909-807-CHIS

Drawing Date

10/01/19

Location Number(s)

Scale Pa g e

VIS Sign Panel Details Trail Direction, Danger, Caution, Regulation, Restroom, Campsite Marker

National Park Service | Harpers Ferry Center | NPS Sign Program A.1

Channel Islands National Park

Description | Notes

VIS - Pedestrian Directional

Project Number

0909-807-CHIS

Drawing Date

10/01/19

VIS Sign Panel Details Trail Direction, Danger, Caution, Regulation, Restroom, Campsite Marker

VIS Panel Swatches

PMS Warm Gray 2 Contractor to calibrate CYMK values so that output matches Pantone color.

Rich Black All black overbars, text, and symbols are to be printed using the following 4-color CMKY process values:

C=40 M=60 Y=40 K=100

Gray Grey portions of prohibition symbols are to be printed using the following 4-color CMKY process values:

C=0 M=0 Y=0 K=80

White C=0 M=0 Y=0 K=0

Panel Colors

Aluminum edges are to be clean and free of burrs and rough edges.

3/8” Radius Corners

High resolution printed graphics (uniform ink application, no streaking) applied to coated aluminum.

UV-resistant, matte-finish protective coating.

Edges and reverse painted or otherwise treated to match PMS Warm Gray 2.

1/4” Mounting Holes (locations shown in drawings)

The contractor will provide posts, stainless steel mounting hardware, and non-conducting washers for each sign assembly.

All sign panel backs and posts are to be individually labeled with removable stickers depicting their corresponding sign drawing numbers to aid in organization and assembly by park sta�.

Post Height

National Park Service | Harpers Ferry Center | NPS Sign Program A.2

Channel Islands National Park

Description | Notes

VIS - Pedestrian Directional

Project Number

0909-807-CHIS

Drawing Date

10/0119

VIS Sign Post Mount Specifications

GL

2"

North South East West

2" 2" 2"

Ground Level to Bottom Edge of Panel

Below-ground Post Depth*

Height of Bottom Panel(s)

Height of Top Panel(s) (if any)

Direction Panel Faces

Fabricate using the following measurements which are indicated in panel artwork drawings:

as indicated in sign drawings UNLESS contractor determines greater depth required for stability.

Maximum depth to be 30 inches.

National Park Service | Harpers Ferry Center | NPS Sign Program A.3

Channel Islands National Park

Description | Notes

VIS - Pedestrian Directional

Project Number

0909-807-CHIS

Drawing Date

02/19/19

VIS Panel and Post Assembly Detail

ASTM A847 2” x 2” 11 gauge (1/8” thickness) Corten Steel Post according to specifications on page A.4

Stainless Steel Low-Profile Nylock Nut

Stainless Steel Button Head Hex Bolt Bolts Trimmed so that the bolt end is flush with the Nylock Nut when the sign is assembled.

0.080” aluminum sign panel according to specifications on pages A.0 - A.1

Non-conducting nylon washers

Back-to-back panels shall share mounting hardware. Each sign assembly will have between 1 and 4 sign panels.

Capabilities and General Requirements Trail Direction signs must be structurally sound, honor the appearance and function of the sign drawings, be capable of being installed without mechanized equipment and without digging or augering, and meet all the requirements laid out in this document.

Signs must be capable of remaining upright without bracing or a concrete footer and withstand winds up to 70 mph.

Post Structures

• Sign posts must be 2”x 2”x 11 gauge (1/8” thickness) Corten Steel tube (ASTM A847), top welded closed, bottom cut on an angle and left open.

- Post top must be sturdily welded closed with a flat surface for hammering into ground. Welds ground smooth.

• Mounting holes to be pre-drilled to align with holes in sign panels. Posts shall have no extraneous holes.

• All above- and below-ground measurements for post lengths shown in the drawings must be honored UNLESS the contractor determines additional below-ground post length is required to ensure sign structure stability in which case below-ground post length is not to exceed 30 inches.

Hardware

• All hardware required for assembly must be supplied.

• Hardware should be resistant to corrosion and non-reactive to Corten steel.

• Panels must be separated from posts using non-cor-rosive vinyl washers to ensure ease of disassembly, should the need arise.

• If use of anti-seize compound is recommended, the compound should be provided and directions for use supplied.

National Park Service | Harpers Ferry Center | NPS Sign Program A.4

Channel Islands National Park

Description | Notes

VIS - Pedestrian Directional

Project Number

0909-807-CHIS

Drawing Date

02/19/19

Scale

N/A

Pa g e

VIS Post Mount Sign Structure Specifications Trail Direction, Danger, Caution, Regulation, Restroom, Campsite Marker

Sample Elevation Drawing

5”

Post End Detail

Identity Sign - Panel Detail

Example layouts

0.125: Aluminum.

Edges clean, free of burs and roughness. All corners and edges must be eased slightly to allow for better paint adhesion and retention.

Panel backs, sides, and edges to be painted to match PMS1615.

Single sided 0.125” aluminum panel with intaglio process painted graphics, full color applied vinyl arrowhead, mounting cleats, all sides and mounts painted to match PMS 1615.

10/13/20 B.0 National Park Service | Harpers Ferry Center | NPS Sign Program

Channel Islands National Park

Description | Notes

Island Identity - Updated materials

Project Number

Drawing Date

Location Number(s)

Scale not to scale

Pa g e

PMS 553 PMS 1615 PMS 1605White

NPS Arrowhead Details

Arrowhead Colors (match):

PMS 1615White

Panel Colors (match):

Intaglio Process Aluminum Panels

Panels shall be fabricated and finished with intaglio graphics. Arrowheads shall be high-resolution outdoor-grade vinyl.

All panels shall be cleaned, primed, and painted per manufacturer’s specifications.

Panels shall be first sprayed with a primer and then a finish undercoat. A comput-er-cut vinyl application shall then be applied and the panel shall be over sprayed with the color top coat. After the top coat is fully dried the vinyl shall be removed to reveal the undercoat. A second or third paint application may be necessary depending on the number of panel colors. After the paint is fully dried, all vinyl and masks shall be peeled and the panel shall be sprayed with a final UV-resistant satin clear coat and anti-graffiti polyurethane coating.

Mounting

Contractor to design mounting cleats and show in full detail in shop drawings.

Contractor will provide cleats and all necessary hardware. Cleats are to be painted to match PMS 1615 and will be hidden from view when the panel is viewed from the front. Hardware may not pass through panel front.

Wall mount signs may protrude from the wall surface no more than 2 inches.

Panel Graphics Panel front, back, sides, edges.

Intaglio process painted graphics with UV-resistant matte finish powder coat.

SRI -100 Panel Mounting Specification

Top of panel must sit 1 to 4 inches below top edge of top rail.

Gap between panel back and pier railing to be 2.5” or less.

All hardware must be able to be installed from the front of the railing or by using tools that fit between the rail slats, not by hanging over the top and reaching down the back of the railing.

Contractor to design and fabricate a mounting system.

French cleat style suggested but other configurations that meet criteria outlined here will be considered acceptable. Hardware must not protrude through the panel face or be visible when the sign is viewed from the front.

All mounting components must be painted to match PMS 1615C and made of materials that resist corrosion.

Panel must be securely affixed to the pier railing and tamper resistant.

8”

6” 1.5”

2.5”

12”

8”

42”

7”

4.5”

3”

4.5”

3”

4”

12”

10/13/20 B.1 National Park Service | Harpers Ferry Center | NPS Sign Program

Channel Islands National Park

Description | Notes

Island Identity - Updated materials

Project Number

Drawing Date

Location Number(s)

Scale not to scale

Pa g e

SBI -100 Panel Mounting Specification

Panel to be centered on middle rail.

Gap between panel back and pier railing to be 2” or less.

Pier raling is constructed of 1.5” Sch 40 aluminum pipe, outside diameter is 1.9.

All hardware must be able to be installed from the front of the railing or by using tools that fit between the rail slats, not by hanging over the top and reaching down the back of the railing.

Contractor to design and fabricate a mounting system.

Hardware must not protrude through the panel face or be visible when the sign is viewed from the front.

All mounting components must be painted to match PMS 1615C and made of materials that resist corrosion.

Panel must be securely affixed to the pier railing and tamper resistant.

1.9”

1.9”

1.9”

27.75” to center

13.5” to center

41.5” to center

10/13/20 B.2 National Park Service | Harpers Ferry Center | NPS Sign Program

Channel Islands National Park

Description | Notes

Island Identity - Updated materials

Project Number

Drawing Date

Location Number(s)

Scale not to scale

Pa g e