Uniform Section Mat (USM)

Uniform Section Mat (USM) is formed with a double-layer woven fabric, joined together by spacer cords on closely spaced centers to produce a mat of uniform thickness. Similar to traditional concrete slope paving, USM creates a solid, high-quality concrete lining with a low hydraulic resistance for use in various lining and erosion resistance applications.

Uniform Section Mat (USM) form a lining of required nominal thickness, bonded cobbled surface and specified weight to provide strength and erosion protection to resist the calculated tractive forces. The design criterion for selection of lining thickness is the same as that used to determine the thickness of conventional concrete slope paving. Relief of hydrostatic uplift pressure may be provided by inserting plastic weep tubes through the mat at specified centers. USM is custom fabricated into multiple mill width panels, designed to fit actual site dimensions and topography.


DESIGN CONSIDERATIONS

  • USM is used where velocities are low to high, bedload and ice formations are light and a roughness coefficient of N=0.015 is required.
  • USM reduces seepage losses in reservoirs, ponds, holding basins and channels.
  • USM is recommended for drainage flumes and spillways.
  • USM should be installed on engineered slopes.

TECHNICAL DATA

UNIFORM SECTION MAT (USM)
STYLE NORMAL THICKNESS UNIT WEIGHT CONCRETE COVERAGE
3” FPM 3.0” 35 lbs./ft² 97 sq. ft./cy
4” FPM 4.0” 47 lbs./ft² 73 sq. ft./cy
6” FPM 6.0” 70 lbs./ft² 49 sq. ft./cy
8” FPM 8.0” 93 lbs./ft² 36 sq. ft./cy
10” FPM 10.0” 115 lbs./ft² 28 sq. ft./cy
12” FPM 12.0” 136 lbs./ft² 22 sq. ft./cy

APPLICATIONS

  • Bridge Abutments
  • Storm Sewer Outfalls
  • Channel Lining
  • Geomembrane Ballast/ Protection
  • Spillway/Weirs
  • Embankments

INDUSTRIES

  • Highways/Bridges
  • Ports/Harbors
  • Dams/Levees
  • Rivers/Canals
  • Flood Control
  • Coastal/Marine
  • Industrial Waste Landfill
  • Mining
  • Oil/Gas Pipeline

MATERIAL PROPERTY – ARMORFORM FABRICS
PROPERTY TEST UNITS VALUE
PHYSICAL
Composition of Yarns - - Polyester
Mass Per Unit Area (Double-Layer) ASTM D 5261 oz/yd² 14
Thickness (Single-Layer) ASTM D 5199 mils 27
Mill Width (Woven) inch 72
MECHANICAL
Wide-Width Strip Tensile Strength - WARP | FILL ASTM D 4595 lbs./inch 340/270
Elongation at Break - WARP | FILL - Max. ASTM D 4595 % 12/12
Trapezoidal Tear Strength - WARP | FILL ASTM D 4533 lbs. 180/170
Grab Tensile Strength ASTM D4632 lbf 364/310
Grab Tensile Elongation ASTM D4632 % 25/21
CBR Puncture Strength ASTM D 6241 lbs. 1575
HYDRAULIC
Apparent Opening Size (AOS)3 ASTM D 4751 U.S. Standard (mm) 20
Flow Rate ASTM D 4491 gal/min/ft² 125

We Built Armorform

We have been transforming every service to become reality

Start Project
close