Attachment_B_MIMA_Fabrication_Intent_Details.pdf

Harpers Ferry Center Harpers Ferry, WV 25425

August 2022

MIMA-2022-1392

May 12, 2023

Fabrication Intent Details

Minute Man National

Historical Park

Attachment B

National Park Service | Harpers Ferry Center | Media Development | Signs

Project Number

Drawing Date Pa g e

1.0 Identity Sign Fabrication Details

MIMA-2022-1392-ID

02-23-2023

Minute Man National Historical Park

GL

2" 2"

Single Post fabrication for the following:

HAGL 24”:

Quanity: 16

PR 1.0 - 16.0

HAGL : 60” min Quanity: 2 PC 1.0 and 2.0

PRIVATE

RESIDENCE

Reserved Parking Private Residence Parking Only

1/4"-20 x 3" Long Galvanized Steel

Carriage Bolt with Washer and Nut

2” x 2” x .0625” Painted black aluminum post Above-ground post length is specified below.

Galvanized Low-Profile Nut and Non-conducting Washer

Private Residence Signs:

Galvanized, Tamper-resistant Bolts Trimmed to Length, Low-Profile Head

Parking Control Signs:

1/4” - 20 x 3” Long Galvanized Steel Carriage Bolt with Washer and nut

0.080” aluminum panel All edges eased, sanded smooth, and painted.

Non-conducting washer

3/8” Radius Corners

Single Post Painted Aluminum with Panel

Concrete Footer with Mow Ring Breakaway or

Frangible Coupling as Required by State and Local Codes

Gravel Layer (For Drainage)

2x2 or 2x3 Post

12"

Fr o st D ep th o r w h ic h ev er is g re at er 6"

Direct Embedment with Mow Ring

Scale: 1-1/2" = 1'-0"

3"

Sig n s sh all b e m o u n ted n o lo w er th an feet to th e b o tto m o f th e sig n n o r m o re th an 8 feet to th e to p o f th e sig n

Drawing Date Pa g e

2.0 Identity Sign Fabrication Details

MIMA-2022-1392-ID

02-23-2023

Minute Man National Historical Park

GL

GL

2"2"

1.0-UP Upright Elevation

Scale: 1/2" = 1' -0"

1.0A-UP Upright Elevation

Scale: 1/2" = 1' -0"

Single sided - Single Frame

Single sided - Double Frame

1.1-UP

2"2"

1.1A-UP

Double Frame Structure with 2” x 2” post fabrication for the following:

Top frame 24” x 18” and bottom frame 24” x 6”:

Quanity: 10

ID 6.0, 10.0, 11.0, 12.0, 14.0, 15.0, 16.0, 18.0, 19.0,

and 28.0

Top frame 30” x 18” and bottom frame 30” x 6”:

Quanity: 4 ID 2.0, 8.0, 17.0. and 20.0

Single Frame Structure with 2” x 2” post fabrication for the following:

Frame 30” x 12”:

Quanity: 1

ID 24.0

Frame 30” x 18”:

Quanity: 3 ID 9.0, 26.0, and 32.0

1-IO - 01

3/8"

1/8" Drilled Weep Hole Note: See Weep Hole Chart

1/2"-20 x 1/2", 18-8 Stainless Steel, Flat Head, Phillips Machine Screw Note: Top of Frame is Connected by Screws and is RemovablePanel Access

Post Cap Welded to Top of Post

1/4"-20, 6061-T6 Machine Screw Nut

Welded to Aluminum Angle

1-3/4"

3/8" Diameter, Aluminum Drive Rivets

Note: Refer to Rivet Chart for Quantity per Frame

1.1A-UP Side Section Cut

Scale: 1/2 Actual Size

1.2-UP

3/16" Aluminum Core Panel Welded to Angle

.090 to .125 Graphic Panel

Standard NPS 3/16" Aluminum “F” Extrusion

3/4" 3/4"

2" x 2" x 1/8" Tubular Aluminum Post

1" x 1" x 3/16" Breakformed Aluminum Angle

1-3/4" x 3/4" x 3/16" Breakformed Aluminum Angle

Single sided Painted Aluminum Frame Fabrication Upright

General Note:

All breakformed steel and aluminum frame edges shall be eased to prevent sharp edges and allow paint adherence.

General Note:

All breakformed steel and aluminum frame edges shall be eased to prevent sharp edges and allow paint adherence.

3/8"

1/8" Drilled Weep Hole Note: See Weep Hole Chart

1/2"-20 x 1/2", 18-8 Stainless Steel, Flat Head, Phillips Machine Screw Note: Top of Frame is Connected by Screws and is Removable

Post Cap Welded to Top of Post

1/4"-20, 6061-T6 Machine Screw Nut

Welded to Aluminum Angle

1-3/4"

3/8" Diameter, Aluminum Drive Rivets

Note: Refer to Rivet Chart for Quantity per Frame

1.1-UP Side Section Cut

Scale: 1/2 Actual Size

1.2-UP

1-IO - 01

3/16" Aluminum Core Panel Welded to Angle

.090 to .125 Graphic Panel

Standard NPS 3/16" Aluminum “F” Extrusion

3/4" 3/4"

2" x 2" x 1/8" Tubular Aluminum Post

1" x 1" x 3/16" Breakformed Aluminum Angle

1-3/4" x 3/4" x 3/16" Breakformed Aluminum Angle

Panel Access

TBD by contractor. Will allow drainage but also not visually distracting. Other options can be proposed during shop drawings for approval for a frame system that holds 2 panels with access from the top and bottom.

Drawing Date Pa g e

3.0 Identity Sign Fabrication Details

MIMA-2022-1392-ID

02-23-2023

Minute Man National Historical Park

1.2-UP Frame Front Elevation

Scale: 1/2 Actual Size

1.3 UP-Frame Top Section

Scale: 1/2 Actual Size

1.3-UP

1/8" Undercut Panel

1/ 8"

U n d er cu t

Pa n el

3/ 8"

3/ 4"

1/

3/4"

1/16"

1- 3/

4"

Standard NPS 3/16" Aluminum “F” Extrusion

3/8" Diameter, Aluminum Drive Rivets Note: Refer to Rivet Chart for Quantity per Frame

1/16" Gap for Panel Expansion

3/16" Aluminum Core Panel Welded to Aluminum Angle

.090 to .125 Graphic Panel

1/16" Gap For Panel Expansion

Standard NPS 3/16" Aluminum “F” Extrusion

2" x 2" x 1/8" Tubular Aluminum Posts

Line Of 3/16" Aluminum Frame

Post Cap

Line Of 1/8" Undercut Graphic Panel

2" x 2" x 1/8" Tubular Aluminum Posts

See Weld Chart

N o m in al D im en si o n

/2

Single sided Painted Aluminum Frame Fabrication Upright

Drawing Date Pa g e

4.0 Identity Sign Fabrication Details

MIMA-2022-1392-ID

02-23-2023

Minute Man National Historical Park

Double Sided - Single Frame

Double sided Painted Aluminum Frame Fabrication Upright

GL

5/16"

2"

See Installation Options

2" 2"

3/8" Diameter, Aluminum Drive Rivets

Note: Refer to Rivet Chart for Quantity per Frame

1-UP - 15 Upright Elevation

Scale: 1/2" = 1' -0"

2-UP - 15 Side Section Cut

Scale: 1/2 Actual Size

2-UP - 15

1-UP - 16

1/4"-20 x 1/2", 18-8 Stainless Steel, Flat Head, Phillips Machine Screw Note: Top of Frame is Connected by Screws and is Removable

1/4"-20 x 3/8", 18-8 Stainless Steel, Flat Head, Phillips Machine Screw

1/4"-20, 6061-T6 Nut Welded to Aluminum C-Channel

1/4"-20, 6061-T6 Nut Welded to Aluminum C-Channel

1/4"-20, 6061-T6 Nut Welded to Aluminum C-Channel

1/4"-20, 316 Stainless Steel Nut Welded to Steel Angle

Note: Ease Top Edge of Post

.090 to .125 Graphic Panel

.125" Aluminum Core Panel

3/4" 3/4"

.125" Aluminum Core Panel Welded to C-Channel

.090 to .125 Graphic Panel

2" x 3/4" x 1/8" Breakformed Aluminum C-Channel

1" x 1" x 1/8" Breakformed Aluminum C-Channel

2" x 2" x 1/8" Tubular Aluminum Post

1/8" Drilled Weep Holes Note: See Weep Hole Chart

2" x 3/4" x 1/8" Breakformed Aluminum C-Channel

1" x 1" x 1/8" Breakformed Aluminum C-Channel

GL

1.0A-UP Upright Elevation

Scale: 1/2" = 1' -0"

Double Sided - Double Frame

2"2"

1.1A-UP

Double sided - Double Frame Structure with 2” x 2” post fabrication for the following:

Top frame 24” x 18” and bottom frame 24” x 6”:

Quanity: 1

ID 25.0

1-IO - 01

Panel Access

General Note:

All breakformed steel and aluminum frame edges shall be eased to prevent sharp edges and allow paint adherence.

General Note:

All breakformed steel and aluminum frame edges shall be eased to prevent sharp edges and allow paint adherence.

Panel Access

Double sided - Single Frame (per side) Structure with 2” x 2” post fabrication for the following:

Frame 36” x 18”:

Quanity: 1

ID 1.0

5/16"

2"

3/8" Diameter, Aluminum Drive Rivets

Note: Refer to Rivet Chart for Quantity per Frame

2-UP - 15 Side Section Cut

Scale: 1/2 Actual Size

1-UP - 16

1/4"-20 x 1/2", 18-8 Stainless Steel, Flat Head, Phillips Machine Screw Note: Top of Frame is Connected by Screws and is Removable

1/4"-20 x 3/8", 18-8 Stainless Steel, Flat Head, Phillips Machine Screw

1/4"-20, 6061-T6 Nut Welded to Aluminum C-Channel

1/4"-20, 6061-T6 Nut Welded to Aluminum C-Channel

1/4"-20, 6061-T6 Nut Welded to Aluminum C-Channel

1/4"-20, 316 Stainless Steel Nut Welded to Steel Angle

Note: Ease Top Edge of Post

.090 to .125 Graphic Panel

.125" Aluminum Core Panel

3/4" 3/4"

.125" Aluminum Core Panel Welded to C-Channel

.090 to .125 Graphic Panel

2" x 3/4" x 1/8" Breakformed Aluminum C-Channel

1" x 1" x 1/8" Breakformed Aluminum C-Channel

2" x 3/4" x 1/8" Breakformed Aluminum C-Channel

1" x 1" x 1/8" Breakformed Aluminum C-Channel

2" x 2" x 1/8" Tubular Aluminum Post

1/8" Drilled Weep Holes Note: See Weep Hole Chart

Drawing Date Pa g e

5.0 Identity Sign Fabrication Details

MIMA-2022-1392-ID

02-23-2023

Minute Man National Historical Park

Double sided Painted Aluminum Frame Fabrication Upright

Post Cap

1/8" Undercut Panel

1/ 8"

U n d er cu t

Pa n el

5/

3/ 4"

1/

3/4"

1/16"

2"

Line Of 1/8" Aluminum Frame

Line Of 1/8" Undercut Graphic Panel

2" x 2" x 1/8" Tubular Aluminum Posts

1/8" Aluminum Core Panel

.090 to .125 Graphic Panel

1/8" Aluminum Core Panel Welded to Aluminum C-Channel

.090 to .125 Graphic Panel

1/16" Gap For Panel Expansion

1" x 1" x 1/8" Breakformed Aluminum C-Channel

2" x 3/4" x 1/8" Breakformed Aluminum C-Channel

2" x 2" x 1/8" Tubular Aluminum Posts

1/4"-20 x 3/8", 18-8 Stainless Steel, Flat Head, Phillips Machine Screw

1/4"-20, 6061-T1 Nut Welded to Steel C-Channel

See Weld Chart

1-UP - 16 Frame Front Elevation

Scale: 1/2 Actual Size

2-UP - 16 Frame Top Section

Scale: 1/2 Actual Size

2-UP - 16

1" x 1" x 1/8" Breakformed Aluminum C-Channel

3/8" Diameter, Aluminum Drive Rivets Note: Refer to Rivet Chart for Quantity per Frame

1/16" Gap for Panel Expansion

2" x 3/4" x 1/8" Breakformed Aluminum C-Channel

1/4"-20, 6061-T1 Nut Welded to Steel C-Channel

1/4"-20 x 3/8", 18-8 Stainless Steel, Flat Head, Phillips Machine Screw

N o m in al D im en si o n

/2

Drawing Date Pa g e

6.0 Identity Sign Fabrication Details

MIMA-2022-1392-ID

02-23-2023

Minute Man National Historical Park

GL

2"3"

1.0-UP Upright Elevation

Scale: 1/2" = 1' -0"

1.1-UP

Structure with 3” x 2” posts fabrication for the following:

Frame 54” x 42”:

Quanity: 1

ID 4.0

1-IO - 01

1.2-UP Frame Front Elevation

Scale: 1/2 Actual Size

1.3 UP-Frame Top Section

Scale: 1/2 Actual Size

1.3-UP

1/8" Undercut Panel

1/ 8"

U n d er cu t

Pa n el

3/ 8"

3/ 4"

1/

3/4"

1/16"

1- 3/

4"

Standard NPS 3/16" Aluminum “F” Extrusion

3/8" Diameter, Aluminum Drive Rivets Note: Refer to Rivet Chart for Quantity per Frame

1/16" Gap for Panel Expansion

3/16" Aluminum Core Panel Welded to Aluminum Angle

.090 to .125 Graphic Panel

1/16" Gap For Panel Expansion

Standard NPS 3/16" Aluminum “F” Extrusion

2" x 3" x 1/8" Tubular Aluminum Posts

Line Of 3/16" Aluminum Frame

Post Cap

Line Of 1/8" Undercut Graphic Panel

2" x 3" x 1/8" Tubular Aluminum Posts

See Weld Chart

N o m in al D im en si o n

/2

Single-sided Painted Aluminum Frame Fabrication Upright

General Note:

All breakformed steel and aluminum frame edges shall be eased to prevent sharp edges and allow paint adherence.

3/8"

1/8" Drilled Weep Hole Note: See Weep Hole Chart

1/2"-20 x 1/2", 18-8 Stainless Steel, Flat Head, Phillips Machine Screw Note: Top of Frame is Connected by Screws and is Removable

Post Cap Welded to Top of Post

1/4"-20, 6061-T6 Machine Screw Nut

Welded to Aluminum Angle

1-3/4"

3/8" Diameter, Aluminum Drive Rivets

Note: Refer to Rivet Chart for Quantity per Frame

1.1-UP Side Section Cut

Scale: 1/2 Actual Size

1.2-UP

3/16" Aluminum Core Panel Welded to Angle

.090 to .125 Graphic Panel

Standard NPS 3/16" Aluminum “F” Extrusion

3/4" 3/4"

2" x 3" x 1/8" Tubular Aluminum Post

1" x 1" x 3/16" Breakformed Aluminum Angle

1-3/4" x 3/4" x 3/16" Breakformed Aluminum Angle

Drawing Date Pa g e

7.0 Identity Sign Fabrication Details

MIMA-2022-1392-ID

02-23-2023

Minute Man National Historical Park

Footer detail for Upright Frame System

GL

Based on Sign Size

Concrete Footer

Gravel Layer (For Drainage)

2x2 or 2x3 Post

12"

Fr o st D ep th o r w h ic h ev er is g re at er 6"

1-IO - 01 Direct Embedment with Mow Ring

Scale: 1-1/2" = 1'-0"

3"

Drawing Date Pa g e

8.0 Identity Sign Fabrication Details

MIMA-2022-1392-ID

02-23-2023

Minute Man National Historical Park

Front and back of panel are the same

Front and back of panel are the same

Front

Front

Front

Reflective

Back

Color to match post

Back

Color to match post

Back

ID 1.0, 2.0, 4.0, 6.0, 8.0, 9.0, 10.0, 11.0, 12.0, 14.0,

15.0, 16.0, 17.0, 18.0, 19.0, 20.0, 24.0, 25.0, 26.0, 28.0, and 32.0

ID 19.0 and 25.0

ID2.0, 8.0, 17.0, and 20.0

Front Back

ID 6.0, 10.0, 11.0, 12.0, 14.0, 15.0, 16.0,

18.0, and 28.0

PR 1.0 - 16.0

PC 1.0 - 2.0

PMS 553PMS Warm Gray 1

PMS 1615 PMS 1605 PMS 7531 PMS 449White

Match Colors:

PMS 342BlackWhite

Match Colors:

PRIVATE RESIDENCE

PRIVATE RESIDENCE

PRIVATE

RESIDENCE

Double sided Direct Print Aluminum Panels

Low Intensity Retro-Reflective Vinyl on Aluminum Panels

Reserved Parking Private Residence Parking Only

NO PUBLIC ACCESS

Each panel shall consist of a solid one-piece panel with 1200 dpi or higher ink jet graphics printed directly on aluminum, then finished with clear hard coat.

Panels shall be high-resolution capable of single and or double-sided printing. Panels are direct imaged or image transferred using UV resistant pigments, finished with a clear baked-on powder coat. Panels shall have the capability to display a matte surface. Vinyl wrapped aluminum panels are not acceptable. Single panels with no seams.

1. All panel dimensions are 1/8” smaller than there named or listed size.

2. All panels are fabricated out of aluminum with a thickness of no greater than 1/8-inches (0.125) and a minimum of .030 inches.

3. Panel must be able to withstand temperatures from -65%f.

to 350 degrees Fahrenheit.

4. Color images shall be printed using ultraviolet resistant inks and finishes. Image shall bleed off the edge of the trimmed panel.

5. Panel imaging must be free of lines or visible dot patterns, ability to print 6pt sans serif typefaces without ink-choking, discernible saw-tooth edge, or other character defects.

6. Panel must have a minimum Barcol hardness factor of 50, tensile strength of 12,000 psi, comprehensive strength of 20,000 psi, and flexural strength of 18,000 psi, minimum impact strength must be at 6 gt bls/in notch with a fire resistance of 500 degrees f

7. Face must not be permanently defaced by seam, acid aromatics, scratching, inks, or paints and should be readily wiped clean with paint remover and solvents without affecting the appearance or legibility of finished or graphics.

8. Face shall retain legibility and finished appearance when sprayed with a 10% solution of hydrochloric, nitric, or sulfuric acid for one half-hour or when scrubbed by a brush or medium hardness using common commercial cleaning compounds such as ammonia, laundry soaps, detergent, carbon tetrachloride, or petroleum-based solvents.

9. All panel materials must be one-piece material, no laminates will be accepted.

10. Panel must be router cut, the edges must not be crazed or cracked, and the finish must be smooth, clean, and neat.

Panels shall have eased edges and radiused corners for safe handling.

11. Fabricator shall use color management throughout their process to meet required color specifications. It is the responsibility of the fabricator to adjust to meet the requirements of their material.

Each panel shall consist of a solid one-piece aluminum panel with low Intensity retro-reflective vinyl with computer cut graphics. Vinyl should be UV resistant.

1. All panels are fabricated out of aluminum with a thickness of no greater than 1/8-inches (0.125) and a minimum of .030 inches.

2. Panel must be router cut, the edges must not be crazed or cracked, and the finish must be smooth, clean, and neat.

Panels shall have eased edges and radiused corners for safe handling.

3. Fabricator shall use color management throughout their process to meet required color specifications. It is the responsibility of the fabricator to adjust to meet the requirements of their material.

QTY: 4

30”x6”

QTY: 9

24”x6”

QTY: 16

6”x12”

QTY: 2

6”x12”

QTY: 2

24”x12”

QTY: 21 Unique Identity Signs, See drawings for panel graphics Sizes vary

Colonel James Barrett House and Farm

National Park Service U.S. Department of the Interior

Minute Man National Historical Park

Circa 1705

Drawing Date Pa g e

9.0 Identity Sign Fabrication Details

MIMA-2022-1392-ID

02-23-2023

Minute Man National Historical Park approx. 148” approx. 183” approx. 45”

Minute Man National Historical Park

National Park Service U.S. Department of the Interior

Gravel Layer (For Drainage) approx.

102” approx.

34”

30” 60”

120” 4”4”

6”

9”

Poured Foundation

Footer depth and dimension to be determined and engineered by contractor.

Sign contractor to engineer footer, footer depth, rebar, footer substrate, concrete mix per local codes and to withstand local conditions.

Footer depth and dimension to be determined and engineered by contractor.

Sign contractor to engineer footer, footer depth, rebar, footer substrate, concrete mix per local codes and to withstand local conditions.

Backfill

Capstones should allow drainage

Posts to be painted black to match identity upright bases. A minimum of 2 posts are required. Contractor to determine if addition-al posts are required for structural integrity.

Frame system to be determined by Contrac-tor. Contractor to submit shop drawings for approval.

Blank Back Panel

Routed Front Panel

See stone wall photos and written specifications on next page for details approx. 56” approx. 45”

Gravel Layer (For Drainage) approx.

102” approx.

34”

30”

Poured Foundation

Backfill

HDU Panel and Stone base:

Quanity: 1

ID 33.0

PMS 553PMS Warm Gray 1

PMS 1615 PMS 1605 PMS 7531 PMS 449White

Match Colors:

Scale: 1/2" = 1'-0"

Scale: 1/2" = 1'-0"

Masonry Base with Stone Column - Main Identity Sign

Drawing Date Pa g e

9.0 Identity Sign Fabrication Details

MIMA-2022-1392-ID

02-23-2023

Minute Man National Historical Park

Type of Stone and Color: Igneous granite (medium gray with minerals), basalt (dark gray), and metamorphic gneiss (greenish-gray). Because of the presence of granite, basalt, gneiss, the overall color of the park’s walls is a dark gray with a hint of green. The green hue is enhanced by the presence of green and gray lichen. Stone with high iron content (rust/orange color), while present in the park’s bedrock, is not desired for the gateway sign’s field stone. Stone shall match historic walls and structures.

Any reclaimed field stone shall be cleaned prior to erection. Do not use wire brushes or imple-ments that mark or damage exposed surfaces. Split stone at site to produce clean faces. Size stone units to fit opening dimensions and perimeter conditions. Arrange stone pattern to provide color uniformity and minimize visual variations and provide a uniform blend of stone unit sizes.

Size (and weight) of stones: Field stone walls include a consistency in overall composition, but some variability in stone size. Generally, the larger stones are set into the ground as part of the footer. Large stones, known as flat stones, may also be used in the upper course as capstones. The top of the wall should be a consistent height. With an assumed weight of 165/lbs a cubic foot, individual stones would range from 100 to 600 lbs in appearance, with most stones in the 100 to 300 lb range in appearance.

Contact between Stones: Stones should have surface contact without air pockets.

Mortar: Mortar is not used in the park’s historic stone walls. Mortar for the gateway sign structure must be concealed and dry stacked. Mortar should be pigmented dark gray so that it is not visible, and joints raked clean or mortar fully concealed within the wall. See example from the Buttrick Estate. Remove excess mortar as work progresses and upon completion of work.

The park’s broad farm field walls are two sided with small stone filling the middle. The sign structure can be poured concrete or CMU block with field stone on the outer layer as long as the outward appearance resembles the park’s historic stone walls.

Horizontal orientation of stones: Fieldstones should be set horizontally with staggered joints as opposed to vertical or diagonal placement of stone. The remnant well-built field stone walls in the park demonstrate a consistent orientation of the stone with weight distributed horizontally.

Stones should not be set upright or at a diagonal, particularly on the pillar.

Split acceptable but not drill marks: Stones may be split, as pictured at Old Manse and Sargent Field walls, but drill marks from splitting should not be visible. Perfectly split stone, such as recycled granite curbing is unacceptable.

Minimize use of wedge stones: Small wedge stones should be minimized as these were not typical of the agricultural walls throughout the park. Wedge stones are typically less than 50 lbs and used to fill gaps between larger stones. Use of more than 10 percent wedge stones in the wall will alter the character of the field stone wall.

Field Stone Pillar: A rectangular or square field stone pillar is challenging to construct with large stones and construct four clean edges. The pillar may be slightly larger to facilitate using large stones on four corners. Splitting stones is acceptable, but placing the grain of the stone vertically is unacceptable. The Old Manse and Sargent Field stone walls provide examples of the type of stone that would work well for the pillar. The Old Manse, Major John Buttrick, and North Bridge Visitor Center images show field stone corners.

Clean soiled surfaces with cleaning solution. Use non-metallic tools in cleaning operations.

The following pictures illustrate the characteristics of Minute Man NHP stone walls to be incorporated into the park’s new main identity sign.

Old Manse: note use of flat stones for top of wall, igneous granite, minimal use of wedges, lots of contact between stones.

Barrett House: note large stone, horizontally laid, minimal use of wedges, stones are igneous granite and metamorphic gneiss—dark gray.

Sargent Field: note large angular stones (split) for even top course.

Monument Street: Note color of stones, larger stone at base, but overall stone size is too small for gateway sign.

Smith House, Battle Road Trail: Note range of sizes, but more surface contact needed.

Major John Buttrick: Example of corner without mortar visible.

Buttrick Estate: Example of rounded pillar with dark gray pigmented concealed mortar.

North Bridge Visitor Center: Example of corner, but with too much mortar.

Visible mortar is not acceptable.

Masonry Base with Stone Column - Main Identity Sign

Drawing Date Pa g e

10.0 Identity Sign Fabrication Details

MIMA-2022-1392-ID

02-23-2023

Minute Man National Historical Park

4” 32”

30”

16”

62” 8” 6”8”

National Park Service U.S. Department of the Interior

North Bridge Minute Man National Historical Park

3" Mow Ring

HDU Panel and Posts:

Quanity: 1

ID 5.0

PMS 553PMS Warm Gray 1

PMS 1615 PMS 1605 PMS 7531 PMS 449White

Match Colors:

24" 18"

Scale: 1/2" = 1'-0"

2-1.0D 1/2" Thick Aluminum Base Plate Cut Detail

Scale: 1 1/2" = 1'-0"

1/

4"

1/ 4"

3-1.0D

18" x 24" Concrete Footer

5/8" Diameter Mounting Holes (Qty: 4)

Note: Cut out Hole For Post

11" x 17" x 1/2" Thick Steel Base Plate eq

1/ 8" eq

1 1/4" eq6 1/8"eq

11"

Frost Depth or 30”, whichever is greater (Contractor to Determine Based on Local Codes and Conditions

1/2” Thick Steel Base Plate

6” Gravel Base (For Drainage)

Double Post Ground Mount Assembly - North Bridge Identity Sign

3/16

3/16

1/2 - 13 Stainless Steel Hex Nut

1/2" Stainless Steel Flat Washer

17" x 11" x 1/2" Thick Aluminum Base Plate Welded to Post

1/2-13 x 12" Long Stainless Steel L-Hook Anchor Bolt

1/2 - 13 Stainless Steel Acorn Nut

3-1.0D Base Plate Connection Detail

Scale: 3" = 1'-0"

Painted HDU Panel With Graphics

Painted HDU Blank Back Panel

8" x 6" x 1/8" Thick Aluminum Post with Welded 3/16" Thick Post Cap and Welded 17" x 11" x 1/2" Thick Aluminum Base Plate, Painted Black to match Upright Identity Bases

8"

1 1/2"

1 1/2" 3"

Aluminum Support Structure, Painted Black

6"

2-1.0B Double Post Ground Mount Assembly

Typical Plan View

Drawing Date Pa g e

11.0 Identity Sign Fabrication Details

MIMA-2022-1392-ID

02-23-2023

Minute Man National Historical Park

Minute Man National Historical Park

National Park Service U.S. Department of the Interior

Router Depth 1/8"

45°

Threaded Rod into Stone Masonry Base

Chamfered Edge

Epoxy Anchors

Use Triangle Pattern To Determine Mounting Hole Location

Sky: Not Routed

Mountain: Not Routed

Lake: Not Routed

Bison: Not Routed

Text: Routed

Snow: Routed

Foreground and Trees: Routed

PMS 553 PMS 1615 PMS 1605White

1-4.0G NPS Arrowhead Routing Details

1 1/2" thick HDU foam, 30lb density or greater.

All non-routed areas remain at the surface level of the original material. Routed areas to be routed to a depth of 1/8”. Material must be sealed and finished on all sides per manufacturer’s specifications.

Match Colors:

2-4.0G Arrowhead Chamfer Detail 3-4.0G Arrowhead Mounting Detail

4-4.0G Arrowhead Mounting Side Section

4-4.0H Arrowhead Mounting Side Section

2-4.0G

1/4" Chamfer

4-4.0G

HDU Panel

45° 45°

1/

2"

HDU Panel

1/

2"

3/ 8"

4-1.0G Routed NPS Rawlinson Typography Section Cut

Actual Size

3-1.0G Routed Frutiger Typography Section Cut

Actual Size

3-1.0G

4-1.0G

Arrowhead to affix to sign base using threaded rods and Epoxy which must not be visible.

National Park Service U.S. Department of the Interior

North Bridge Minute Man National Historical Park

3-1.0G

4-1.0G

3/8" Deep Routed Dado Line Under Overbar, Painted Same Color as Panel Background

2-1.0H

Routed HDU Identity Panels

Threaded Rod

Sign Panel Routed to a depth of 1/2”

Epoxy Anchors

Arrowhead

NPS Arrowhead Attachment to Panel NPS Arrowhead Attachment to Masonry Base

Sign panel shall be machine-routed to a depth of 0.5" using a vertical-sided, flat-bottom router bit to accept routed, painted NPS Arrowhead. Arrowhead silhouette routed in the sign panel shall be oversized by 1/8" to accommodate inset NPS Arrowhead. Arrow-head to affix to sign panel using threaded rods and Epoxy which must not be visible.

Drawing Date Pa g e

12.0 Identity Sign Fabrication Details

MIMA-2022-1392-ID

02-23-2023

Minute Man National Historical Park

Material Overview and Fabrication Written Specifications for HDU Panel and Frame

High Density Foam (HDU) for NPS Park Identity Signs:

Panel Material:

Sign panels are to be constructed of high density urethane closed cell rigid foam with a minimum density of 20 lbs per cubic foot. The contractor must select a type of HDU foam that is widely used in the outdoor sign industry and follow all manufacturers specifications for painting, routing, and hardware attachment.

Panel Size:

Sign panel shall be fabricated based on dimensions and format specified in the Sign Drawing Package. Panel sizes, specifica-tions, dimensions, typography, color, and proportions shall not be altered.

Panel Assembly:

Each panel shall be constructed from a single piece of HDU foam, sealed and finished on all sides. If Panel must be spliced together to achieve full panel sign than the sample submitted must include a seam and bonding agent for approval before fabrication. Seam must not be noticeable.

Panel thickness prior to painting shall be 1-1/2". All surfaces shall be finish sanded smooth and face and back edges shall rounded to a radius of 1/8".

Graphic Layout:

Graphic layout of panels shall be as shown on the attached drawings. Graphics to be accurately reproduced from plotted outline template or directly from computer to router based on full size digital vector art. Contractor shall use an accurate grid to ensure layout is aligned vertically and horizontally.

Typography shall be NPS Rawlinson Heavy and Frutiger Bold as shown on attached drawings. Typography shall not be altered, manipulated, or changed. Substitute fonts shall not be used.

NPS Rawlinson Heavy shall be Machine-routed unless other-wise specified with a 90 degree “V" router bit with a 1/8" vertical, flat sidewall inset. Routed letters shall conform to the same size artwork. Routing depth shall be uniform. Corners of type smaller than 3" cap height shall have a radius no greater than 0.0625. Type larger than 3" cap height shall have a corner radius no greater than 0.125".

Frutiger Bold typography shall be Machine-routed unless otherwise specified using a vertical-sided, flat-bottom router bit. Routing depth to be 0.375".

A 0.250" deep dado shall be routed in the panel between the main panel and the overbar. Dado height shall be as indicated in the attached drawings. If unspecified in drawings, dado height shall be determined based on cap height of main typography (0.0833 x cap height - .25" for 3", 0.333" for 4", .50 for 6"). Dado shall be routed in to the main panel field with the overbar being full height. Routed dado shall be painted same color as the overbar.

NPS Alternate Panel layouts receive a vertical dado in addition to the horizontal dado. Vertical dados shall be routed to a depth of 0.250". Vertical dado width shall be based on the cap height of main typography (0.0833 x cap height - .25" for 3", 0.333" for 4", .50 for 6"). Vertical dados shall be painted as specified below.

Panels shall be Machine-routed to receive an NPS arrowhead to a depth of 0.5" using a vertical-sided, flat-bottom router bit in Overbar section of panel for NPS Standard Panel layouts or Main Sign Panel for NPS Alternate layouts. Arrowhead shiloutte routed in the sign panel shall be oversized by 1/8" to accommodate inset NPS Arrowhead.

All routed type, dados, and insets shall be sanded smooth and clean. All edges shall be free of burrs and all edges eased prior to application of primer coats and paint.

Paint:

Prior to painting panels shall be finish sanded smooth. Panels shall not be finished with hand planes, hand-held belt, orbital, or vibrating sanders. All dust and sanding residue shall be removed from the sign. Panel shall be properly cleaned per paint manufacturer’s instructions.

Panels shall be sprayed using a VOC compliant, Mathews White Epoxy Primer (or approved equal) on all surfaces. Primer coats shall be applied in strict accordance with the paint and HDU foam manufacturers’ specifications.

Final top coat colors shall be a Matthews Satin VOC, Semi Gloss finish applied per the graphic layouts.

1. Panel Overbar and dado between main panel face and overbar shall be NPS River Rock (Matthews Paint MP63852, PMS 449), Satin VOC Semi Gloss (or approved equal). The Overbar color shall wrap to panel sides;

2. Main Panel Face, sides, and panel back shall be Northwood Brown (Matthews MP63853, PMS 7531) Satin VOC Semi Gloss (or approved equal);

3. Panel Typography and Vertical Dado on NPS Alternate Panel layouts shall be Matthews MP63854, PMS Warm Gray 1, Satin VOC Semi Gloss (or approved equal).

Edges between type, dados, and flat panel sections shall be clean and sharp. Ragged edges and transitions, drips, and oversprays and not acceptable.

Steel Steel Sign Structure:

Sign assemblies shall be fabricated with tubular steel upright posts, 4" x 4" x 1/4" wall. Panels shall attach to a steel mounting structure designed and engineered by the fabricator to meet visual criteria shown in the drawings. Hardware cannot pass through sign face.

Steel posts shall be mounted per the specified drawings and can include direct embedment of posts or baseplate mounting. Steel post length shall be cut per specified drawings. Posts shall be cut to allow flush alignment of post and sign panel.

Steel mounting plate shall be fabricated with A-36, A-500B, or A-847, x 1/4" steel plate. Internal weld edges shall be welded clean and ground smooth.

Paint:

Prior to painting, all steel components shall be sanded, sand blasted, or bead blasted to remove all oils, burrs, and rust. Rust shall be completely removed from all surfaces, edges, and corners. Exposed welds shall be ground clean and smooth.

Cleaning of steel surfaces shall be in strict accordance with paint manufacturer’s specifications. All surfaces shall be completely dry prior to primer application.

After cleaning, all steel components shall be sprayed using a VOC compliant, Mathews White Epoxy Primer (or approved equal) on all surfaces. Primer coat(s) shall be applied in strict accordance with the paint manufacturer’s specifications.

Final top coat colors shall be a Matthews Satin VOC, Semi Gloss finish (or approved equal). Post and steel mounting plate assemblies shall receive a minimum of two top coat finishes.

Paint shall be applied smooth and clean with no oversprays, drips, paint runs, or bubbles. Paint shall be applied so that weep holes are clear and not plugged.

Sign posts, all mounting components, and steel mounting plates shall be Northwood Brown (Matthews MP63853, PMS 7531) Satin VOC Semi Gloss (or approved equal).

After final top coat paint applications, all steel post and mounting plate surfaces shall receive a Matthews Satin Clear, MP281-228, Satin Polyurethane Finish (or approved equal). The finish shall be applied in strict accordance with the paint manufacturer’s specifications.

Drawing Date Pa g e

12.0 Identity Sign Fabrication Details

MIMA-2022-1392-ID

02-23-2023

Minute Man National Historical Park

Sample Art - 1.0 High Density Urethane (HDU) Foam

Sample Art - 2.0 High Density Urethane (HDU) Foam Minimum size 15”

Sample Art - 3.0 Double Sided Direct Print Aluminum Front and back of panel are the same

Sample Art - 4.0 Low Intensity Retro-Reflective Vinyl on Aluminum Panels Back of panel to match post

24”

1 1/2" Flat Routing Technique

All panel samples are to follow the same fabrication techniques and finish shall be of the quality required for the final sign panel.

Sample

HDU

Routed and Painted

22”

1/3"Routed Dado painted color of overbar

4" V Routing technique

2" Flat Routing Technique

Sample

National Park Service U.S. Department of the Interior

Direct Print Aluminum

Reserved Parking Low Intensity Retro-Reflective

Samples