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

732.07
Ensure that the design of the pushbutton and its associated contacts and housing
are sturdy and resistant to mechanical shocks and abuse. Ensure that a
concentrated force of 50 pounds (225 N) applied to the button or any exposed
portion does not damage the unit or misadjusts the contacts. Furnish a housing
with a curved back surface for mounting on poles of various diameters. Integrate
the curved surface with the housing or supply an adapter with a flat back type
housing. Attach the cover assembly to the housing by stainless steel machine
screws, resulting in a weatherproof and shockproof assembly. Furnish a hole
threaded for a 1/2-inch (13 mm) pipe in the housing for conduit attachment
purposes. Paint external surfaces yellow with enamel paint of Color 13655,
Federal Standard 595.
Ensure that the maximum force required to operate the pushbutton is 5 pounds
per foot (22.5 N). Furnish a raised or flush pushbutton with a minimum of 2
inches (50 mm) at its smallest dimension.
Furnish pedestrian pushbutton signs that are a minimum of 0.07-inch (1.8 mm)
steel or 0.10-inch (2.5 mm) aluminum. Ensure that the legends and backgrounds
are baked enamel paint for steel signs and enamel paint or non-reflective sheeting
for aluminum signs.
Furnish materials according to the Department’s Qualified Products List
(QPL).
732.07 Loop Detector Units.
A. NEMA TS-1. Ensure that the loop detector units comply with the
requirements of NEMA TS-1, section 15, with the following modifications.
Furnish shelf mounted loop detector units that are powered from 120 volts. Use
solid state isolated output units for all controller applications where directly
connected to a solid state digital controller unit. Ensure that the conductors in the
cable harness for loop input pins are twisted three to five times per 1 foot (300
mm).
Ensure that the electrical connections for four-channel shelf-mounted units
either are the 19-pin MS connector, as required by the foregoing specification, or
consist of four connectors of the type required for single-channel shelf-mounted
detector units.
If specified, design detector unit electrical connection plugs or wiring harness
such that any multi-channel shelf-mounted detector unit may be readily replaced
with single-channel detector units. Accomplish this by furnishing only units with
the connector type required for single-channel shelf-mounted detector units, or by
wiring the controller back panel to single-channel harnesses which are, in turn,
plug-connected to an adapter harness which is mated to the multi-channel
connector of the detector unit.
Furnish loop detector unit with an LED or LCD display indication of call
strength ( L/L or equivalent). This display shall be a bar graph or numerical
display with at least eight (8) discrete levels indicated.
Furnish materials according to the Department’s Qualified Products List (QPL).
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