North American Green ShoreMax Installation Manual
SHOREMAX® FLEXIBLE TRANSITION MAT
INSTALLATION GUIDE
Introduction to the ShoreMax® Transition Mat
The North American Green® RevetMax™ System ShoreMax®
Transition Mat is designed for protection of high scour and
high velocity applications. The flexible transition mat can be
used in varying applications and can replace hard-armor
designs with “green” vegetated designs.
To create the maximum vegetated design, we suggest
combining two high-performance North American Green
Erosion Control Products (ECPs), the ShoreMax Mat and a
VMax® Turf Reinforcement Mat (TRM). North American Green
offers many different VMax TRMs that can be used with the
ShoreMax Mat. The VMax TRM’s special structural design
anchors and reinforces the roots and stems of vegetation for
long-term stability, and helps create a shear plane that
deflects the flowing water away from the soil surface. The
ShoreMax Mat provides mechanical protection and ballasting
to the protected area and increases the immediate
permissible shear stress capabilities of the system.
Once installed, the ShoreMax Mat offers protection
comparable to hard-armor products such as rock riprap and
articulated concrete blocks in turbulent flow and wave attack
applications. ShoreMax Mat can take your high flow projects
to the maximum in green vegetated design with unvegetated
shear performance up to 8.6 lbs/ft
2
.
FEATURES OF SHOREMAX TRANSITION MAT
ShoreMax Mat is the first flexible soft revetment
scour protection system that easily installs over difficult soil
topography, and does not require heavy equipment or
expensive earth anchors to install. It’s also non-buoyant, so it
won’t float or uplift in submerged and heavy flow conditions.
ShoreMax Mat is designed with “spikes” that bite into the
underlying mat, which prevents horizontal shifting of the
mat.
KEY APPLICATIONS
ShoreMax Transition Mat is designed for immediate to
permanent protection for high scour applications such as
head-to-tail protection of drainage channels, culvert and
pipe outfalls, and steep chute and slope drains like those
associated with parking lots, roadways, mines and landfills.
The flexible transition mat can be used to create soft
revetment systems. ShoreMax Mat can be utilized for
shorelines, streambanks, and spillway applications where
wave attack can reach the super critical stage.
SHOREMAX TRANSITION MAT DESIGN CRITERIA
TRM Underlayment Type and
Phase
SC250
C350
P550
2
The ShoreMax Transition Mat has been evaluated for its performance in conjunction with a VMax TRM in both channel and wave attack applications,
resulting in these guidelines.
Unvegetated 7.5 lb/ft
Vegetated 10 lb/ft
Unvegetated 8.0 lb/ft
Vegetated 12 lb/ft
Unvegetated 8.5 lb/ft
Vegetated 14 lb/ft
Maximum
Permissible
Shear Stress
2
2
2
2
2
2
Maximum
Flow Velocity
18 f t/s
18 f t/s
19 f t/s
20 f t/s
19.5 ft/s
25 f t/s
6 in. wave height,
≤4:1 slope
6 in. wave height,
≤3:1 slope
6 in. wave height,
≤2:1 slope
Maximum Wave Attack Applications
12 in. wave height,
≤5:1 slope
12 in. wave height,
≤4:1 slope
12 in. wave height,
≤3:1 slope
N/A
N/A
18 in. wave height,
≤5:1 slope
MAXIMUM DESIGN CONDITIONS
Shear Stress Velocity Wave Height
2
≤6 lb/ft
>8 lb/f t
2
2
>6–8 lb/ft
TABLE 1: Minimum anchor pattern TABLE 2: Minimum anchor type
≤14 ft/s 6 in. F
>14-18 ft/s 12 in. G
>18 f t/s 18 in. H
Anchor
Pattern
MINIMUM ANCHOR TYPE BASED ON SOIL T YPE
Soil Type Anchor Type
Clay – Clay Loam 10 in. Wire Staple or 12 in. ShoreMax Stake
Silt Loam – Loam 10 in. Wire Staple or 12 in. ShoreMax Stake
Sandy Loam 12 in. Wir e Staple or 12 in. ShoreMax Stake
Sand/Muck ≤6 in. 12 in. Rebar Staple
Sand/Muck 6-12 in. 18 in. Rebar Staple
Sand/Muck 12-18 in. Earth Anchor 400 + 12 in. Rebar Staple
Sand/Muck >18 in. Earth Anchor 680 + 18 in. Rebar Staple
Anchoring and Guidelines
Installation of the ShoreMax Mat can be done simply and
without the need for expensive equipment. The ShoreMax
Mat and TRM underlayment are simply installed over a
prepared seeded soil and fastened into place with anchors.
Special percussion earth anchors are typically not required.
The ShoreMax Mat’s flexibility allows it to be easily installed
using a variety of fasteners such as the ShoreMax Stake, wire
staples, rebar staples and percussion earth anchors. Because
it easily self-conforms to the underlying terrain, fasteners are
not required to force conformance with the underlayment
material – they only serve to hold the panels in place. The type
and size of fastener used is simply dependent upon the
underlying soil and degree of compaction.
Anchoring patterns for the ShoreMax Mat vary depending on
the project applications with increased anchoring patterns
required for higher flow or scour applications. Please refer to
the tables and figures on this page to determine the
appropriate anchor type and anchor pattern. For site-specific
recommendations use the Erosion Control Materials Design
Software® (ECMDS) for help in selecting a ShoreMax Mat and
fastening details. Visit www.ECMDS.com for more
information.
ANCHORING GUIDE
1. When installing the ShoreMax Mat, the anchor pattern
(Figures 1 or 2) should be selected based on the expected
maximum design conditions (shear stress, velocity or
wave impact) (Table 1).
2. Anchor type selection should be based on the soil type and
pull-out strength required (Table 2). In soft, highly erodible
soils percussion earth anchors may be necessary. Earth
anchors can be installed in conjunction with staples
(Figure 2).
3. When using percussion earth anchors, position anchors
in each corner and the center of the panel. Place staples
in the appropriate pattern through remainder of mat.
Staples can be shared between two adjacent panels.
* NOTE: Number of staples used per panel can be reduced by 30-40 percent
when sharing staples between panels.
– Staple/Stake – Percussion Earth Anchor
F Pattern G Pattern H Pattern
Max.
9 staples/panel
FIGURE 1 : Anchor Patterns for use with staples/stakes FIGURE 2: Anchor Patterns for use with a combination of earth anchors
Max.
13 staples/panel
Max.
15 staples/panel
F Pattern G Pattern H Pattern
5 EA + Max .
4 staples/panel
and staples
5 EA + Max .
8 staples/panel
5 EA + Max .
10 staples/panel
3
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