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Float Specifications Text
Float Cross Section

Polyethylene Encasement:

ShoreMaster floats are manufactured from linear, virgin polyethylene resin containing UV inhibitors and carbon black pigment to protect against ultra violet degradation. This resin offers a balance of toughness, rigidity, environmental stress, crack resistance and low temperature impact performance unmatched by any other material. A nominal wall thickness of .15” is standard on all ShoreMaster floats unless a specific wall thickness is requested.

Shoremaster’s polyethylene resin is a food grade material in compliance with the FDA Title 21. As a food grade material, you are ensured that the float will not contaminate the waterway.

The polyethylene resin is included in Underwriters Laboratory Class 746C and flame class UL-94HB. The molded encasements also meet the Hunt Falling Dart puncture and thickness test.

The polyethylene shell will conform to the following properties:


Properties

ASTM

Units

Typical Units

Density

D-1505

g/cc

0.937

Melt Index (190c//21.6kg)

D-1237

.

5.0

ESCR (100/gelpad, F-90)

D-1693(B)

Hrs.

1000

Tensile Strength at yield, 2"/min.

D-638

psi

2600

Flexural Moduals (1% Secant)

D-790

psi

75,600

Low Temperature Impact

ARM-STD-40F

ft-lbs.

51

Brittleness Temperature

D-746

0 deg. C

-90

Heat Distortion Temperature

D-648

0 deg. C

63


Expanded Polystyrene:

All ShoreMaster floats are filled with expanded polystyrene (EPS) beads. The EPS foam has a 0.9 to 1.2 pound per cubic foot density with water absorption not to exceed 3.0 pounds per cubic foot as determined in accordance with the Hunt absorption test.
The EPS meets Underwriters Laboratory fire resistence standards UL723 and UL1975. The EPS contents will also conform to ASTM C-578 and ASTM E84 and the following properties:


Properties

ASTM Test

Units

Value

Density

C-303

Min lb./ft3

0.90

Thermal Resistance

@ 25º F (-3.9º C)
25º F (-3.9º C)
25º F (-3.9º C)
25º F (-3.9º C)

C-177 or C-518


C-158

Min R for 1" Thickness



4.20
4.00
3.60
3.25

Compressive resistance at Yield or 10% Deformation

D-1621

Min psi

10.0

Flexural Strength

C-203

Min psi

25.0

Water Vapor Permeability

E-96

Max perm-in

5.0

Water Absorption

C-272

& by Vol Max

4.0

Dimensional Stability

 

Max %

2.0

Oxygen Index

D-2863

Min %

24.0

Coefficient of Thermal Expansion

D-696

In/in/º F

0.000035

Flash Ignition Temperature

D-1929

º F

824

Auto-Ignition Temperature

D-1929

º F

896

BTU Content

NFPA 259

BTU/lb.

17,245

 

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