Roman Stone Construction Manufacturer of Specialty Concrete and Iron Products
Roman Stone Construction located in Bay Shore Long Island is a manufacuter of concrete specialty concrete iron and iron products serving New York City Westchester Nassau and Suffolk Counties

CON EDISON SPECIFICATIONS - Continued

Purchase and Test 

Manual no.  6  - Section 7                                                             EO-1042-18
Field Manual No 17 - Section 1                                                    8-3-87

1.0     SCOPE - This specification covers pre-cast concrete conduit used for housing electrical
       cable.

2.0     APPLICATION - This specification applies to all Con Edison districts

3.0     GENERAL - This specification covers the materials, design, manufacture, testing,
        inspection, acceptance and identification of straight and bend sections of pre-cast
        concrete conduits and adapters.

4.0     REQUIREMENTS

      4.1     MATERIALS          
                 4.1.1           Cement - The cement used shall be Portland Cement. It shall conform to
                               the requirements of the Standard Specification for Portland cement of the
                               American Society for Testing and Materials, ASTM designation c150.

                 4.1.2           Aggregates - Aggregates shall conform to the requirements of the
                               Specification for Concrete Aggregates, ASTM c33.

                 4.1.3           Water - The water used in mixing mortar or concrete shall be free from
                               oil, acids alkalies, or vegetable matter.

                 4.1.4           Admixtures - No hardening or curing agent shall be used in the
                               manufacture of the conduits and adapters.

4.2     DESIGN
                 4.2.1           Straight Sections - The conduit shall be of a square external cross section,
                               a smooth concentric bore and accompanying dimensions as specified on
                               Drawing EO-7875-D

                 4.2.2           Bends - The conduit along its entire length shall have smooth concentric
                               bore, square external cross section and accompanying dimensions as
                               specified on Drawing EO 9489-C.. Dimensions of the conduit bend shall
                               be determined by its radius and central angle.

                 4.2.3           Adapters - Adapters along their entire length shall have a smooth
                               concentric, bore, square external cross section and accompanying
                               dimensions as specified on Drawings EO 9947-D, EO 9962-D, EO
                               11048-D and EO 11049-D. They shall be measured along the body of
                               the conduit inclusive of the male ends.

                 4.2.4           Bell End Conduit - The conduit along its entire length shall have a smooth
                               concentric bore, square external cross section and accompanying
                               dimensions as specified on Drawings EO 9799-D. The longitudinal
                               dimension of the conduit shall be straight and measured along the body of
                               the conduit inclusive of the mail end. Bell-end conduit shall be furnished for
                               use at manhole entrances. The bell-end shall be installed flush with inside
                               face of the manhole.

                 4.2.5           Method of Joining - Conduits shall have heavy male-ends which mate with
                               a plastic coupling as indicated in EO-9490D. They shall be joined with a
                               force fit having sufficient pressure to prevent foreign matter from entering
                               conduit.

4.3     MANUFACTURE

                 4.3.1           The conduits, bends and adapters shall be made to meet the inspection and
                               test requirements outlined in this specification. The conduits, bends and
                               adapters shall be air-cured for a 28 day period before delivery. Steam
                               curing may be used upon specific approval from the Distribution Structures
                               Engineer.

                 4.3.2           Conduit bends and adapters made in a form shall be vibrated during
                               manufacture so as to produce a dense and smooth product with optimum
                               strength.

                 4.3.3           The mix shall have a low water content in order to produce a no-slump
                               concrete mortar.

4.4     INSPECTION

                 4.4.1           All conduits and adapters shall be free from cracks, broken ends, defects
                               or irregularities. The inner surface shall be smooth and free from burrs,
                               blisters, loose sand or concrete. The finished product shall be free of
                               foreign matter and shall conform to the dimensions and tolerances shown
                               on the appropriate drawings.

                 4.4.2           All conduits shall be subject to inspection at the factory, Company yard,
                               trench or other points of delivery by an inspector employed by the
                               Company. Conduits that do not conform to this Specification shall be
                               rejected. Bundles containing faulty conduit shall be rejected in their entirety.

4.5     TESTING OF CONDUIT

                 4.5.1           Purpose - The company reserves the right to test at its own expense any
                               or all conduits and adapters for the purpose of determining compliance
                               with this specification.

                 4.5.2           Restrictions - Specimens that have been used in any one of the strength
                               tests shall not be used for any other test.

                 4.5.3           Mandrel Test - A flexible steel mandrel as shown on drawing EO-4410-c
                               and of a diameter ¼” less than the normal bore diameter shall pass freely
                               through each section of conduit.

                 4.5.4           Transverse Loading for Straight Sections - The 4’ long  test specimen shall
                               be  placed on two hardwood supports, 2inches square by 6 inches long,
                               placed 42 inches apart, center to center. The load shall be applied, midway
                               between the supports, on a hardwood bearing block 2 inches wide, 6
                               inches long and 1 inch thick, placed across the conduit. The speed of the
                               cross head of the test machine shall be between 0.06 and 0.08 inches per
                               minute. The minimum breaking load shall be 2,500 pounds for 4” conduit
                               and 3,500 pounds for 5 inch conduit. The Company reserves the right to
                               also test 2’ long straight sections.

                 4.5.5           Transverse loading for bend sections - Conduit bends, 2’ long with 5’, 10’
                               or 20’ radius shall be placed on supports consisting of 1 inch diameter
                               rollers, 6 inches long, located 21 inches center to center. The load shall be
                               applied on the crown of the duct midway between the supports on a 2
                               inch flat plate 6 inches long, placed across the conduit. The speed of the
                               cross head of the test machine shall be between 0.03 and 0.04 inches per
                               minute. The test breaking load shall exceed 4,800 pounds for 4 inch
                               conduit and 6,000 pounds for 5 inch conduits.

                 4.5.6           Compression (Load Crushing) Test - The specimen for the compression or
                               load crushing test shall have a nominal length of 12 inches. Its faces shall be
                               smooth and level with no surface irregularities. The specimen shall then be
                               tested between two,  flat,  hardwood blocks in a standard testing machine.
                               The wood blocks shall be 2 inches thick and the contact surfaces
                               approximately ¼ inch longer than the surface dimensions of the specimen.
                               If the bottom and top surfaces of the specimen are not smooth and level,
                               then they must be capped parallel with hydrostone or equal to allow for a                                uniform spread of the test load. The speed of the cross head of the test
                               machine shall be between 0.03 and 0.04 inches per minute. The load shall
                               be increased until the specimen fractures or drop in load is indicated on the
                               test machine. The breaking load shall exceed 4,900 pounds for 4 inch
                               conduit and 6,000 pounds for 5 inch conduit. The Company reserves the
                               right to also test 2’ long and 4’ long sections.

                 4.5.7           Friction Test - The test specimen shall be a four foot straight section placed
                               in a horizontal position. The test shall be performed measuring the tension
                               required to keep a 2 ½ standard steel pipe, 2 7/8 O.D., 12 long moving                                through the conduit at approximately 1 foot per second. The steel pipe
                               shall be uniformly weighted after its weighted edges shall be rounded. The                                formula for calculation of the coefficient of friction is as follows:

                                           F= T/W

                                           F = Dry sliding coefficient of friction
                                           W= Weight of pipe in pounds 
                                           T = Tension to move pipe in pounds

                              For this test two 4’ sections of pipe will be selected at random and four
                               tests shall be made with the duct on each of the four sides. A dry sliding
                               coefficient of friction of less than 0.4 is required.

4.6     ACCEPTANCE
The Company shall accept only conduit which fully meets requirements of this Specification. Failure of 2% of a conduit shipment to meet the requirements shall be cause for rejection of the entire shipment. All rejected conduits shall be unmistakably identified, removed and replaced with conduits which meet the requirements of this Specification.

4.7     IDENTIFICATION
                 4.7.1           Straight Sections - Straight conduits shall be identified with name of
                               manufacturer and year of manufacture.

                 4.7.2           Adapters - Adapters shall be identified with name of manufacturer and
                               type designation using ink and 2 inch minimum height figures to identify
                               each adapter as follows:

Marking

Drawing No.

Title

4H-4K, 5H - 5K

EO 9947-D

Adapter type 4H-4K ot 5H-5K to receive Plastic coupling and 4" or 5" Korduct, Steel, Fiber, FRP, or Schedule 40 PVC Conduit.

4H-3 ½ K, 4H-3K, 4H-2K, 5H-4K

EO-11048-D

Adapter Type 4H-3 ½ K, 4H-3K, 4H-2K, 5H-4K to receive Plastic Coupling and 4",  3 ¼",  3", 2" Korduct, Steel, Fiber, FRP or Schedule 40 PVC Conduit.

4H-4LM, 5H-5LM

EO-11048-D

Adapter Type 4H-4LM, 5H-5LM to receive Plastic Coupling and 4" or 5" Light Male End Pre-cast Concrete Conduit.

4H-4F, 5H-5F

EO-11049-D

Adapter Type 4H-4F, 5H-5F to receive Plastic Coupling and 4" or 5" Female End Pre-cast Concrete Conduit.


                 4.7.3           Bend Sections - Bends shall be identified as to manufacturer and type in
                               accordance with Drawing EO 9489-C, latest revision.

5.0     SPECIFICATIONS
        Drawing EO-4410 C......."Mandrel for Clearing Ducts"
        Specification EO-1179......."Couplings used with Pre-cast Conduit"
        Specification EO-8007......."Installation of Pre-cast Concrete Conduit"

6.0     ATTACHMENTS
        EO-7875D Rev 8  - Pre-cast Concrete Conduit with Thick Male Ends
        EO-9799-D Rev 5 - Pre-cast Concrete Conduit Bell End with Thick Male Ends
        EO-9489-C Rev 9 - Pre-cast Concrete Conduit Bends with Thick Male Ends
        EO-9947-D Rev 7 - Pre-cast Concrete Conduit Adapter Type 4H-4K Or 5H-5K
        EO-9490-D    -  Plastic Coupling For Pre-Cast Concrete Conduit with Thick Male Ends

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