Plastic Laminate: Polyester resin reinforced with fiberglass
Tensile strength at break: 15,000 PSI min, ASTM D6388*
Flexural strength: 25,000 PSI min, ASTM D790*
Tangent modulus of elasticity: 1,000,000 PSI min, ASTM D790*
Glass Content: 30% minimum
All Surfaces: Sealed with 15 mils of smooth white gel coat
Wall Thickness: 1/4 " Nominal
Concrete Anchor Clips
(optional): Fiberglass
Stilling Wells (optional): Same as flume
Bubbler Tube (optional): Type 304 Stainless Steel
Staff Gages (optional): White with black markings; graduated in
feet and tenths of feet. Integrally molded
in flume wail.
*1/4" flat bar stock
Flumes shall be supplied with integral Foam Reinforcing Ribs
and Top Stiffener Angles as required by Flume size.
H flumes are primarily designed for measuring flows that vary widely such as seasonal runoffs and overflow from darns. The recommended approach channel' length is five times the height of the flume. The width of the channel should equal the width of the entrance to the flume. The flume crest should be set level with the approach channel. The approach channel slope should not exceed 2%. As the flow exits the flume, it must be able to spill clear or flow in a manner equivalent to spilling clear.
The flumes may be set in concrete or earth or bolted to companion structures using the 2-inch flange provided. When pouring concrete, brace the flume internally with 2" x 4" blocks cut to size to prevent bulging the walls. Remove the bracing when the concrete is set.
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