Fibrelite Trench Specifications

GENERAL SPECIFICATIONS

1. SCOPE

            1.1   Provide a fabricated composite underground utility trench system (for electrical cabling or mechanical piping) as provided by Trenwa, Inc; 1419 Alexandria Pike; Fort Thomas, KY  41075. The manufacturer must have experience in design and fabrication of similar products and with facilities for fabricating them with the quality specified herein and without delay to the specified schedule.

2. DESIGN

           2.1   The composite trench components shall be designed to conform to AASHTO M306: specifications for H20 loading.   The trench bases and lids must be proof load tested to 40,000 lbs. per M306. They shall be tested individually and as a unit.

                  The components shall be lightweight and easily installed without lifting equipment.  The trench shall be designed to withstand soil surcharge loading during installation and use such that the sidewalls do not flex in a manner to prevent the lids from fitting.

3. MATERIALS

The composite trench assembly and materials shall conform to the following standards:

H20 Loading AASHTO	M306-10	Passed > 40,000 lbs
Compressive Strength	ASTM C-170 D6641 / D695	Min. 17,000 psi
UV Radiation	ASTM G-53	No visible change
UV Radiation	ASTM G-154	No visible change
Water Absorption	ASTM C-97 /D5229	None
Specific Gravity	ASTM C-97 /D792	150lb/ft³  2.40
Fire Resistance	ASTM E-84	Passed
Slip Resistance	ASTM E303	Passed
Freeze/Thaw Resistance 1000 Cycles	ASTM C-666	No change
Kerosene	ASTM D-543	Passed
Transformer Oil	ASTM D-543	Passed
Sodium Chloride	ASTM D-543	No significant change
Sodium Chloride 5%	ASTM D-543	No significant change
Sulfuric Acid 0.1N	ASTM D-543	No significant change
Sodium Hydroxide 0.1N	ASTM D-543	No significant change

 

4. REINFORCEMENT

            4.1   The composite trench shall not be reinforced with steel or other metal components.

5. SUBMITTALS

           5.1   Engineering layout drawings will be provided for approval and to assist with field installation. The drawings will include dimensions, identification, and location of each trench part in the trench layout, along with a bill of material.

 

ROAD CROSSING TRENCH SPECIFICATIONS

1. GENERAL

1.1   The trench system will consist of lightweight, high strength, U-shaped bases and removable covers, manufactured by Trenwa, and installed in earth trenches with covers extending above the surrounding crushed rock surface.

1.2   All sections of trench designated for road crossing use will be designed to carry HS20 (32,000) lbs. axle loading and will be furnished in standard 5 foot lengths and shall be light enough to be lifted by 2-4 people.

1.3   The lids for the road crossing trench will be made of FRP Composite materials designed to carry HS20 (32,000 pound) axle loading and shall be light enough to be lifted by 2-4 people.

1.4   The interior clear cross sectional area for the road crossing bases will be at least (20″) or (30″) wide x 16” deep.

1.5   The trench system shall be designed and constructed so that supplemental support such as protection rods or cross supports are not required.