2010 Construction and Material Specifications - Ohio Department of ...

725.21
design with one pole for each line or phase conductor. Ensure that cord connector,
plug and inlet on the ring for electrical power to the luminaires are NEMA L8-20
devices for 480 volt systems or are NEMA L6-30 devices for 240 volt systems.
devices
7. Operating Manual. Furnish a complete manual including instructions on
installation, operation and maintenance for each lowering device, winch assembly
and portable power winch drive unit.
8. Shaft. Ensure that shaft of the tower is of not more than four round or multisided
tapered steel sections for towers up to and including 100 feet (30 m), five
sections for towers over 100 feet (30 m) up to and including 120 feet (37 m), and
six sections for towers over 120 feet (37 m). Ensure that the shaft is of steel
having a minimum yield strength of 55,000 psi (379 MPa). Ensure that the shaft
sections are joined by telescoping the bottom of the upper section over the top of
the lower section for a minimum length of 1 1/2 times the external diameter of the
bottom of the upper section or two feet (0.6 m) whichever is greater and driving
the joint tight. Ensure that the sections have been pre-fitted and match-marked at
the factory. Ensure that the inside surface of the shaft is relatively smooth and that
there are no more than two longitudinal welds which shall be made by automatic
electric arc welding. Ensure that the longitudinal seam welds have complete
penetration, are of uniform density, are no thinner than the shaft material nor no
more than 20 percent thicker than the shaft material. Ensure that the base plate is
fabricated from steel which conforms to the requirements of ASTM A 36/A 36M
and that the shaft is joined to the base plate using the American Welding Society
prequalified joint TC-U4a-S or TC-U4c-GF. Ensure that the hand hole in the shaft
is properly reinforced to avoid stress risers and that the reinforcements are welded
to the shaft using a joint and techniques designed to insure total penetration plus an
outside fillet equal to the thickness of the shaft material. Ensure that all welds in
the shaft satisfy AWS D 1.1 Structural Welding Code Article 9.25.3 for tensile
stress when tested either by the ultrasonic method or by an approved alternate
method, and that certified results are furnished to the Laboratory. Ensure that the
door is fabricated from the same type steel as the shaft, is attached with a
continuous stainless steel hinge having non-removable stainless steel hinge pins,
fits the opening closely, and is securely held shut. Ensure that there are provisions
for padlocking the handhole door closed and that each tower has been furnished
with a vandal resistant padlock having a bronze or brass lock body and a
corrosion-protected steel shackle keyed to the key number specified by the
maintaining agency. Ensure that there are two holes, tapped 1/2-13, 180 degrees
apart provided at the base of the tower for the grounding conductors. Ensure that
the shaft shall be hot dipped galvanized after fabrication in accordance with the
requirements of 711.02. Ensure that each shaft is identified by a raised or
engraved marking applied to the edge of the base plate which identifies the
manufacturer and the year that the shaft was manufactured and that such marking
remains legible after the pole has been galvanized.
9. Anchor Bolts and Nuts. Ensure that each anchor bolt is steel conforming to
ASTM F1554, Grade 55, and galvanized in accordance with 711.02. at least 2
inches (50 mm) beyond the threads. In lieu of a bent end, an anchor bolt with the
lower end threaded and inserted into a steel plate of approved size and thickness
790