Spec Formliners — Pattern Library
DOT Approved 1100 Series Sound Wall Ready

Fractured Fins.

Angular relief and vertical depth for DOT sound walls, highway infrastructure, and architectural concrete surfaces. Featuring Washington Rib, Dover Flute, and the complete 1100 series — available in plastic, urethane, and elastomeric materials.

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Fractured Fins, Ribs & Flutes — 1100 Series

Choose a Fractured Fin, Rib or Flute for Your Project

Spec Formliners' 1100 Series includes fractured fins, ribs, flutes and rope-style patterns with a wide range of relief depths, center-to-center spacing, peak widths and valleys. These differences change how the finished wall reads from both close range and roadway viewing distances.

For long sound walls, underpasses and other transportation surfaces, compare the rhythm of the pattern as carefully as the texture itself. Tighter spacing creates a more continuous vertical texture, while wider ribs and deeper relief can produce stronger shadow lines and a more pronounced appearance across long wall runs.

Once a short list is selected, use the pattern name or number when requesting a sample or project pricing.
Select Your Path
For Architects & Specifiers
Review the Pattern,
Then Request a Sample
Choose the pattern or patterns you want to compare, note the pattern name or number, and submit a sample request so the physical texture and relief can be reviewed as part of the selection process.

Request a Pattern Sample
For Contractors, Precasters & Active Projects
Have a Selected Pattern
or an Active Project?
Send the selected pattern name or number with the project information you have available through the quote form so the Spec Formliners team can review the application, material and pricing needs.

Get Project Pricing
Design Inspiration
Fins & Ribs as Architectural Statements
Fractured fin and rib textures define light, shadow and rhythm across large concrete surfaces. See how designers are using vertical relief to give transportation and civic walls a distinct visual character.

Gateway to The Strip: I-15 Tropicana Project
Using fractured fins or ribs for transportation concrete? Review Highway Noise Barriers, Freeway Underpasses and Bridge Abutments & Wingwalls.
1101

Standard Spec Rib

0.75" depth
1.5" C-C
0.5" peak
0.5" valley
1102

Corea Flute

1.75" depth
3" C-C
1" peak
1" valley
1103

Stanton Rib

1" depth
2" C-C
1" peak
0.25" valley
1104

Denver Rib

1.5" depth
3.375" C-C
2" peak
0.75" valley
1105

Las Vegas Rib

1" depth
2" C-C
0.5" peak
0.5" valley
1106

Dover Rib

1" depth
2.5" C-C
0.875" peak
0.875" valley
1106A

Dover Flute

1.25" depth
2.5" C-C
0.75" peak
1" valley
1106B

1106B Dover Flute

1" depth
2.5" C-C
1" peak
1" valley
1106Wavy

Wavy Dover Flute

1" depth
2.5" C-C
1" peak
1" valley
1107

Mission Flute

1.5" depth
2" C-C
0.75" peak
0.75" valley
1107Custom

1107 Custom

1.5" depth
2" C-C
1108

Washington Rib

1.25" depth
2" C-C
1" peak
0.5" valley
1109

Abiline Rope

1.625" depth
4" C-C
2" peak
2" valley
1110

Bush Rib

1.5" depth
3" C-C
1" peak
1" valley
1111

Harbor Rib

1.5" depth
6" C-C
2" peak
3" valley
1112

JLD Flute

0.625" depth
1" C-C
0.5" peak
0.25" valley
1114

1/2" Fractured Rope

0.5" depth
2" C-C
1" peak
1" valley
1115

Yumpa Rib

0.75" depth
8" C-C
7" peak
1" valley
1116

Jackson Rib

0.375" depth
1.25" C-C
0.4375" peak
0.4375" valley
1117

Split Face Rib

1" depth
4" C-C
3" peak
0.75" valley
1118

Ripped Rope Rib

0.75" depth
3" C-C
1121

Rebar #6

1.25" depth
5.5" C-C
0.75" valley
1123

Vedder Flute

1.375" depth
2" C-C
0.75" peak
0.5" valley
1124

Zaha Rib

1.5" depth
1" peak
3.5" C-C
1.5" valley
1124A

1124A Zaha Rib

1.5" depth
3.5" C-C
1" peak
1.5" valley
1124B

1124B Zaha Rib

1.5" depth
3.5" C-C
1" peak
1.5" valley
1125

Galloway Rib

1.25" depth
2" C-C
0.75" peak
0.75" valley
1127

Extreme Fractured Rib

1.5" depth
2" C-C
0.75" peak
0.75" valley
1128

Utah Rib

0.625" depth
~1.4375 C-C
0.50" peaks
0.50" valleys
1130

Conor Rib

0.75" depth
1.5" C-C
0.75" peak
0.25" valley
1131

Boise Rib

1" depth
4" C-C
3" peak
0.75" valley
1132

Atlantic Rib

1.25" depth
4" C-C
1.875" peak
1.875" valley
1133

Pontiac Rib

1" depth
3.5" C-C
1.5" peak
1.5" valley
1140

Rio Hondo Rib

1.25" depth
3" C-C
1.625" peak
0.75" valley
1142

Long Island Rib

0.5625" depth
1.5625" C-C
0.5625" peak
0.5625" valley
1143

Florida Flute Modified

1" depth
4" C-C
1.5" peak
2" valley
1146

Cimarron Rib

0.625" depth
3" C-C
2" peak
0.75" valley
1147

Napa Rib

1" depth
1.5" C-C
0.5" peak
0.5" valley
1149

Park Rib

1" depth
2.5" C-C
1.25" peak
1" valley
1153

Phoenix Rib

1.125" depth
Random C-C
1154

Walters Flute

0.375" depth
1.50" C-C
0.75" squared peaks
0.75" valleys
1155

T-Rex Rib

1.50" depth
9.625" C-C
7" peaks
2.625" valleys
1161

Honor Rib

1" depth
2" C-C
1.125" peak
0.5" valley
1168

Duke Rib

1/4” (6mm) max. depth
2/3" (17mm) C-C
1171

Colorado Drag

1.5" depth
1.5" - 5"random flute width
1.5" valley
.25" draft
1172

Fox Rib

~1/2” (13mm) max. depth
~4" (100mm) C-C
~3-1/8" (80mm) rib width
~47.25" x 10' (1.2m x 3.05m)
1173

Temecula Rib

1” (25mm) max. depth
1-1/2" (38mm) C-C
5127

1" Extreme Fractured Rib

0.5"-1" (25mm) extremely fractured fin
2" (51mm) pattern repeat
Project Questions

Fractured Fin
Project Questions

Compare relief depth, center-to-center spacing, peak width and valley width along with the overall texture. Those dimensions determine the rhythm, shadow and visual scale of the finished wall.

The right pattern depends on wall scale, viewing distance, DOT or project requirements and the amount of relief desired. Use the published dimensions to narrow the options, then request samples for the patterns being considered.

Note the pattern name or number. Architects and specifiers can use the Sample Request form. Contractors and active project teams can use Get a Quote and include the pattern plus available project information.

Ready to Move Forward?

Request a sample of any fractured fin or rib pattern, or submit a project for pricing.

Get a Quote Request a Sample
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