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<div placeholder id="header" class="whs1"><table x-use-null-cells cellspacing="0" width="100%" class="whs2">
  <col class="whs3">
  <col class="whs3">
  <tr valign="top" class="whs4">
  <td width="50%" class="whs5">
  <p class=HeaderFooterText
	style="font-size: 8pt;">Structures Design Guidelines</td>
  <td width="50%" class="whs6">
  <p class=HeaderFooterText
	style="text-align: right; font-size: 8pt;"
	align=right>Jan 2008</td></tr>
  <tr valign="top" class="whs4">
  <td colspan="1" rowspan="1" width="50%" class="whs7">
  <p class=HeaderFooterText
	style="font-size: 8pt;">8 - Movable Bridges</td>
  <td colspan="1" rowspan="1" width="50%" class="whs8">
  <p class=HeaderFooterText
	style="text-align: right;"
	align=right>&nbsp;</td></tr>
 </table>
</div>
<h2>8.7 Electrical [LRFD-MHBD 8]</h2>

<h3><a name=SDG_8_7_Service></a>8.7.1 Electrical Service [LRFD-MHBD 8.3]</h3>

<p class=OutlineA>A. Wherever possible, design bridge electrical service 
 for 277/480 V, three-phase, &quot;wye.&quot; </p>

<p class=OutlineA><span style="margin-left: 0px;">B. Size feeders to limit 
 voltage drop to not more than 5% from point of service to farthest load. 
 &nbsp;</span></p>

<p class=OutlineA><span style="margin-left: 0px;">C. Do not apply a diversity 
 factor when calculating loads.</span></p>

<h3><a name=SDG_8_7_AC_Motors></a>8.7.2 Alternating Current Motors [LRFD-MHBD 
 8.5] (01/06)</h3>

<p class="whs9">Size and select motors per AASHTO requirements. 
 On hydraulic systems provide 25% spare motor capacity. Specify motors 
 that comply with the following requirements:</p>

<p class=OutlineA>A. Design Criteria for Start-Ups: 12 per hour, 2 per 
 ten-minute period.</p>

<p class=OutlineA>B. Power Output, Locked Rotor Torque, Breakdown or Pullout 
 Torque: NEMA Design B Characteristics. </p>

<p class=OutlineA>C. Testing Procedure: ANSI/IEEE 112, Test Method B. Load 
 test motors to determine freedom from electrical or mechanical defects 
 and compliance with performance data. </p>

<p class=OutlineA>D. Motor Frames: NEMA Standard T-frames of steel or cast 
 iron (no aluminum frames allowed) with end brackets of cast iron with 
 steel inserts. Motors 10 Hp and larger must be TEFC. </p>

<p class=OutlineA>E. Thermistor System (Motor Sizes 25 Hp and Larger): 
 Three PTC thermistors embedded in motor windings and epoxy encapsulated 
 solid-state control relay for wiring into motor starter. </p>

<p class=OutlineA>F. Bearings: Grease-lubricated, anti-friction ball bearings 
 with housings equipped with plugged provision for relubrication, rated 
 for minimum AFBMA 9, L-10 life of 20,000 hours. Calculate bearing load 
 with NEMA minimum V-belt pulley with belt centerline at end of NEMA standard 
 shaft extension. Stamp bearing sizes on nameplate. </p>

<p class=OutlineA>G. Nominal Efficiency: Meet or exceed values in ANSI 
 Schedules at full load and rated voltage when tested in accordance with 
 ANSI/IEEE 112.</p>

<p class=OutlineA>H. Nominal Power Factor: Meet or exceed values in ANSI 
 Schedules at full load and rated voltage when tested in accordance with 
 ANSI/IEEE 112. </p>

<p class=OutlineA>I. Insulation System: NEMA Class F or better.</p>

<p class=OutlineA>J. Service Factor: 1.0.</p>

<h3><a name=SDG_8_7_Generators></a>8.7.3 Engine Generators [LRFD-MHBD 8.3.9] 
 <a class="expandspot" href="javascript:kadovTextPopup(this)" id="a1" style="font-size: 10pt;"><span class=expandtext
									style="color: #008000;"><font color=green >(07/06)</font></span></a><span class=expandtext style="display: 'none';" id=POPUP206994635 >   July 2006 &nbsp;- 
 Rev to require 24 hour fuel supply at 100% load . Jan 2005 - Revised to 
 provide direction for rehab and new construction and provide for 2 generators 
 on new construction.</span></h3>

<p class=OutlineA>A. Design per the requirements of the latest edition 
 of NFPA 110. Specify only diesel-fueled generators. Specify day tank with 
 a minimum 10-gallon capacity. Do not use the day tank capacity as part 
 of the main tank capacity. Submit calculations justifying recommended 
 fuel tank size.</p>

<p class=OutlineA>B. New Bridges:</p>

<p class=OutlineA1>1. Provide two generators: Main Generator to power leaf 
 drives and House Generator to power “house” loads.</p>

<p class=OutlineA
	style="font-style: italic;">Commentary: Bridges are requiring bigger 
 generators to operate because of the increase in main drive power requirements. 
 It is not cost effective to run these generators continuously to power 
 miscellaneous loads and generator manufacturers do not recommend running 
 diesel generators at low loads for extended periods.</p>

<p class=OutlineA1>2. Size Main Generator so that one side of the channel 
 (one side of the bridge) can be opened at a time. Main Generator to run 
 during openings only.</p>

<p class=OutlineA1>3. Size House Generator to power house loads like traffic 
 lights, navigation lights, tender house air conditioner, and house lights. 
 House Generator to run continuously during power outage and is to be inhibited 
 from transferring to the 480 volt bus when the Main Generator is running.</p>

<p class=OutlineA1>4. Provide fuel tank sized to hold enough fuel to run 
 the Main Generator, at 100% load, for 12 hours and the House Generator, 
 at 75% load, for 72 hours (minimum 50 gallons).</p>

<p class=OutlineA>C. Rehabilitations:</p>

<p class=OutlineA1>1. Size generator so that one side of the channel (one 
 side of the bridge) can be opened at a time concurrent with traffic lights, 
 navigation lights, tender house air conditioners, and house lights.</p>

<p class=OutlineA1>2. Provide fuel tank sized to hold enough fuel to run 
 the generator, at 100% load, for 24 hours (minimum 50 gallons)</p>

<h3><a name=SDG_8_7_ATS></a>8.7.4 Automatic Transfer Switch [LRFD-MHBD 
 8.3.8]</h3>

<p class=OutlineA>A. Design switch in conformance with the requirements 
 of the latest edition of NFPA 110.</p>

<p class=OutlineA>B. Specify Automatic Transfer Switch with engine generator. 
 Specify an Automatic Transfer Switch that is fully rated to protect all 
 types of loads, inductive and resistive, from loss of continuity of power, 
 without de-rating, either open or enclosed.</p>

<p class=OutlineA>C. Specify withstand, closing, and interrupting ratings 
 sufficient for voltage of the system and the available short circuit at 
 the point of application on the drawings. Provide short circuit calculations 
 to justify ATS proposed.</p>

<h3><a name=SDG_8_7_Elec_Control></a>8.7.5 Electrical Control [LRFD-MHBD 
 8.4]<span style="font-weight: normal;
					color: #008000;
					font-style: italic;"> <font color=green ><I></I></font></span><a class="expandspot" href="javascript:kadovTextPopup(this)" id="a2"><span class=expandtext
	style="font-weight: normal;
			color: #008000;
			font-style: italic;"><font color=green ><I>(07/06)</I></font></span></a><span class=expandtext style="display: 'none';" id=POPUP194538204 >   July 2006 - Added B discouraging touch screen controls.</span></h3>

<p class=OutlineA>A. Design an integrated control system. Develop a control 
 interface that matches the operating needs and skill levels of the bridge 
 tenders and maintenance personnel that will be using the system. Design 
 a system configuration, select control devices, and program the Programmable 
 Logic Controller (PLC) to produce the desired interface that will comply 
 with the Operation Sequence furnished by the SDO.</p>

<p class=OutlineA>B. The use of touch-screen controls is discouraged. If 
 touch-screen controls are specified provide full backup controls on control 
 console.</p>

<p class=OutlineA>C. Design the bridge control system to be powered through 
 an uninterruptible power supply.</p>

<p class=OutlineA>D. EMERGENCY-STOP (E-STOP) stops all machinery in the 
 quickest possible time but in no less than 3 seconds main drives only. 
 In an emergency, hit this button to stop machinery and prevent damage 
 or injury. Specify a button that is reset by twisting clockwise (or counterclockwise) 
 to release to normal up position.</p>

<p class=OutlineA>E. At a minimum, provide alarms for the following events:</p>

<p class=OutlineA1>1.) All bridge control failures.</p>

<p class=OutlineA1>2.) All generator/Automatic Transfer Switch failures.</p>

<p class=OutlineA1>3.) All traffic signal failures.</p>

<p class=OutlineA1>4.) All navigation light failures.</p>

<p class=OutlineA1>5.) All traffic gate failures.</p>

<p class=OutlineA1>6.) All span-lock failures.</p>

<p class=OutlineA1>7.) All brake failures (if applicable).</p>

<p class=OutlineA1>8.) All leaf limit switch failures.</p>

<p class=OutlineA1>9.) All drive failures; including motor high temperature 
 (motors larger than 25 Hp) and all hydraulic system failures.</p>

<p class=OutlineA1>10.) Near and far-leaf total openings (not an alarm 
 but part of the monitoring function).</p>

<p class=OutlineA1>11.) All uses of bypass functions, type and time (not 
 an alarm but part of the monitoring function).</p>

<p class=OutlineA>F. See <a href="../TOC/TOC_Vol-7_DesignAids.htm">Volume 
 7-Design Aids</a> for pdf's showing movable bridge alarms, controls sequence 
 flowcharts and limit switches.</p>

<h3><a name=SDG_8_7_Motor_Controls></a>8.7.6 Motor Controls [LRFD-MHBD 
 8.6] <a class="expandspot" href="javascript:kadovTextPopup(this)" id="a3" style="font-size: 10pt;"><span class=expandtext
										style="color: #008000;"><font color=green >(07/06)</font></span></a><span class=expandtext style="display: 'none';" id=POPUP194105364 >   July 2006 - Added B seal-in functions at starters.</span></h3>

<p class=OutlineA>A. Specify full-size NEMA rated starters. Do not use 
 IEC starters unless space constraints require their use, and then, only 
 by obtaining prior approval from the SDO.</p>

<p class=OutlineA>B. Provide seal-in functions at starters only using auxiliary 
 starter contacts, do not use separate relays or PLC outputs.</p>

<p class=OutlineA>C. Do not include panelboards and transformers in the 
 Motor Control Center (MCC) unless space constraints require it, and then, 
 only by obtaining prior approval from the SDO.</p>

<h3><a name=SDG_8_7_7_PLC></a>8.7.7 Programmable Logic Controllers [LRFD-MHBD 
 8.4.2.3]</h3>

<p class="whs9">Refer to the Technical Special Provisions 
 issued by the SDO.</p>

<h3><a name=SDG_8_7_8_Limit_Sw></a>8.7.8 Limit and Seating Switches [LRFD-MHBD 
 8.4.4] <a class="expandspot" href="javascript:kadovTextPopup(this)" id="a4" style="font-size: 10pt;"><span class=expandtext
											style="color: #008000;"><font color=green >(01/06)</font></span></a><span class=expandtext style="display: 'none';" id=POPUP192442944 >   Jan 2006 - Per AFR Deleted limit switch labels. Required end of travel 
 limit switches to be wired directly to MCC.</span></h3>

<p class=OutlineA>A. Design each movable leaf with FULL-CLOSED, NEAR-CLOSED, 
 NEAR-OPEN, FULL-OPEN, and FULL-SEATED limit switches. Specify NEMA 4, 
 corrosion resistant metallic housings which have a high degree of electrical 
 noise immunity and a wide operating range. Specify that NEAR-OPEN and 
 NEAR-CLOSED limit switches be mounted, initially, approximately eight 
 degrees from FULL-OPEN and FULL-CLOSED, respectively. Final adjustment 
 of NEAR-OPEN and NEAR-CLOSED will depend upon bridge configuration, drive 
 machinery, and bridge operation.</p>

<p class="whs10">Commentary: <span style="font-style: italic;"><I>The 
 FULL-CLOSED switch controls the drive stop and the FULL-SEATED switch 
 is the safety interlock to allow driving the locks.</I></span></p>

<p class=OutlineA>B. Do not connect limit switches in series between different 
 drives. Connect each limit switch to a relay coil (use interpose relays 
 to connect to a PLC input.) &nbsp;Provide 
 position encoder (potentiometer or other type) to drive leaf position 
 indicators on control console. The position encoder will also provide 
 a signal to the PLC to use as a reference to determine leaf limit switch 
 failure. Connect limit switches in the following configurations:</p>

<p class=OutlineA1>Traffic Gates: End-Of-Travel configuration.</p>

<p class=OutlineA1>Span Locks: End-Of-Travel configuration.</p>

<p class=OutlineA1>Leaf(s): End-Of-Travel configuration.</p>

<p class=OutlineA1>Safety Interlocks: Indicating configuration.</p>

<p class="whs10">Commentary:</p>

<p class="whs10">“End-Of-Travel” is a NOHC 
 (Normally Open Held Closed) limit switch that opens to stop motion and 
 “Indicating” is a NO (Normally Open) limit switch that closes to indicate 
 position has been reached.</p>

<p class=OutlineA>C. Do not use electronic limit switches. Plunger type 
 switches are optional.</p>

<p class=OutlineA>D. Connect End-Of-Travel limit switches directly to the 
 HAND-OFF-AUTO switches on the MCC so that manual operation of equipment 
 from the MCC is possible independent of the condition of the control system.</p>

<h3><a name=SDG_8_7_9_Interlocks></a>8.7.9 Safety Interlocking [LRFD-MHBD 
 8.4.1]<span class=expandtext> <a class="expandspot" href="javascript:kadovTextPopup(this)" id="a5" style="font-size: 10pt;">(01/06)</a><span class=expandtext style="display: 'none';" id=POPUP194576451 >   Jan 2006 per AFR Added paragraph E.</span></span></h3>

<p class=OutlineA>A. Traffic Lights: Traffic gates LOWER is not enabled 
 until traffic lights RED. Provide bypass capability labeled TRAFFIC LIGHT 
 BYPASS to allow traffic gates LOWER without traffic lights RED.</p>

<p class=OutlineA>B. Traffic Gates:</p>

<p class=OutlineA1><span style="margin-left: 0px;">1.) Bridge Opening: 
 Span locks PULL is not enabled until all traffic gates are fully down 
 (or TRAFFIC GATE BYPASS has been engaged).</span></p>

<p class=OutlineA1>2.) Bridge Closing: Traffic lights GREEN is not enabled 
 until all traffic gates are fully raised (or TRAFFIC GATE BYPASS has been 
 engaged).</p>

<p class=OutlineA1>3.) Provide bypass capability labeled TRAFFIC GATE BYPASS 
 to allow span lock PULL without all traffic gates LOWERED or traffic lights 
 GREEN without all traffic gates RAISED.</p>

<p class=OutlineA>C. Span Locks:</p>

<p class=OutlineA1>1.) Bridge Opening: Leaf RAISE is not enabled until 
 all span locks are fully pulled (or SPAN LOCK BYPASS has been engaged).</p>

<p class=OutlineA1>2.) Bridge Closing: Traffic gate RAISE is not enabled 
 until all span locks are fully driven (or SPAN LOCK BYPASS has been engaged).</p>

<p class=OutlineA1>3.) Provide bypass capability and label SPAN LOCK BYPASS 
 to allow leaf RAISE without all span locks pulled or traffic gate RAISE 
 without all span locks DRIVEN.</p>

<p class=OutlineA>D. Leaf:</p>

<p class=OutlineA1>1.) Span locks DRIVE is not enabled until leaf (s) is(are) 
 FULLY SEATED (as indicated by the FULLY SEATED switch).</p>

<p class=OutlineA1>2.) Provide bypass capability and label LEAF BYPASS 
 to allow span lock DRIVE without leaf (s) FULLY SEATED.</p>

<p class=OutlineA>E. Manually lowering a traffic gate arm will start RED 
 flashing lights on the gate arm and will turn corresponding traffic lights 
 RED independent of the condition of the control system.</p>

<h2><a name=SDG_8_7_10_Instruments></a>8.7.10 Instruments [LRFD-MHBD 8.4.5]</h2>

<p class="whs9">Provide wattmeter for each drive (pump) motor 
 and provide leaf position indication for each leaf.</p>

<h3><a name=SDG_8_7_11_Console></a>8.7.11 Control Console [LRFD-MHBD 8.4.6]</h3>

<p class=OutlineA>A. Specify a Control Console that contains the necessary 
 switches and indicators to perform semi-automatic and manual operations 
 as required by the standard FDOT Basic Sequence Diagram. </p>

<p class=OutlineA>B. All wiring entering or leaving the Control Console 
 must be broken across approved terminals.</p>

<p class=OutlineA>C. No components other than push buttons, selector switches, 
 indicating lights, terminal blocks, etc., must be allowed in the Control 
 Console.</p>

<h3><a name=sdg_8_7_conductors></a>8.7.12 Conductors [LRFD-MHBD 8.9]<a class="expandspot" href="javascript:kadovTextPopup(this)" id="a6">(01/08)</a><span class=expandtext style="display: 'none';" id=POPUP203872835 >   Jan 2008 Added section. Renumbered balance of chapter.</span></h3>

<p class=OutlineA>A. Single conductor insulated wire. Specify THHW/THWN 
 rated 600 VAC 75 degrees C insulation. Specify SE, or RHW insulated wire 
 for incoming services.</p>

<p class=OutlineA>B. Do not use aluminum or solid copper conductors.</p>

<p class=OutlineA>C. Do not specify wire smaller than No. 12 AWG for power 
 and lighting circuits and smaller than No. 14 AWG for control wiring between 
 cabinets, except that control wiring within a manufactured cabinet may 
 be No. 16 AWG. Minimum field wire size is No. 12 AWG for control conductors 
 between cabinets and field devices and No. 10 AWG for motor loads. No. 
 14 AWG pigtails, no longer than 12 inches, are allowed for connection 
 of field devices that cannot accommodate a No. 12 AWG wire. Use No. 10 
 AWG for 20 A, 120 VAC, branch circuit home runs longer than 75 feet, and 
 for 20 A, 277 VAC, branch circuit home runs longer than 200 feet.</p>

<p class=OutlineA>D. Do not include power and control conductors in the 
 same conduit.</p>

<p class=OutlineA>E. If more than three current carrying conductors are 
 included in a conduit, derate the conductors per Table 310.15(B)(2)(a) 
 of the NEC. For derating purposes, consider all conductors, other than 
 neutrals and ground wires, as current carrying.</p>

<h3><a name=8_7_Connections></a>8.7.13 Electrical Connections between Fixed 
 and Moving Parts [LRFD-MHBD<span style="margin-left: 0px;"> 8.9.5]</span> 
 </h3>

<p class="whs9">Specify extra flexible wire or cable.</p>

<h3><a name=8_7_Connections_across_channel></a>8.7.14 Electrical Connections 
 across the Navigable Channel [LRFD-MHBD 8.9.7]<a class="expandspot" href="javascript:kadovTextPopup(this)" id="a7">(01/08)</a><span class=expandtext style="display: 'none';" id=POPUP191651276 >   Jan 2008 - Revised A. Power Cable requirements. Revised D. to allow 
 Schedule 120 PVC if exposed, or Schedule 80 PVC if encased in concrete.</span></h3>

<p class=OutlineA>A. Specify a submarine cable assembly consisting of the 
 following three separate cables:</p>

<p class=OutlineA1>1.) Power Cable: Specify wire size and number as required 
 for main drive motors but not more than nine conductors per cable. Specify 
 minimum #10 AWG for gate motors, barrier motors, etc., but not more than 
 twelve per cable. The maximum number of conductors per cable allowed is 
 21 (9 motor cables and 12 #10 cables).</p>

<p class=OutlineA1>2.) Signal and Control Cable: Jacketed and armored with 
 fifty #12 AWG copper and five pairs of twisted shielded #14 AWG copper 
 conductors. </p>

<p class=OutlineA1>3.) Bonding Cable: A single #4/0 AWG copper conductor.</p>

<p class=OutlineA>B. Determine the total number of conductors required 
 of each size and the number of runs of each type of cable that is required 
 for the project. Use only multiples of the cables listed above. Allow 
 for at least 25% spare conductors for each size.</p>

<p class=OutlineA>C. Specify quick-disconnect type terminals for terminating 
 conductors. Specify terminals that isolate wires from a circuit by a removable 
 bridge or other similar means. Specify NEMA 4X enclosures for all terminals.</p>

<p class=OutlineA>D. Design all above the water line, vertical runs of 
 cable with supports at every five feet if surface mounted. Specify and 
 detail a protective sleeve (Schedule 120 PVC if exposed or Schedule 80 
 if encased in concrete) around the cable from a point 5 feet below the 
 mean low tide to a point 5 feet above mean high tide. Specify a watertight 
 seal at both ends of the sleeve.</p>

<h3><a name=8_7_Conduit></a>8.7.15 Conduits [LRFD-MHBD 8.10]<a class="expandspot" href="javascript:kadovTextPopup(this)" id="a8">(01/08)</a><span class=expandtext style="display: 'none';" id=POPUP196963665 >   Jan 2008 - Added new section, renumbered balance of chapter.</span></h3>

<p class=OutlineA>A. Do not specify aluminum, IMC, or EMT conduits. Specify 
 conduit types as follows:</p>

<p class=OutlineA>1) One inch minimum size Schedule 80 PVC for underground 
 installations and in slab above grade (embedded).</p>

<p class=OutlineA>2) One inch minimum rigid galvanized steel (PVC coated) 
 for outdoor locations, above grade, exposed (leafs) and exposed in dry 
 locations (in pier, control house).</p>

<p class=OutlineA>3) 3/4 inch minimum size Schedule 80 PVC for wet and 
 damp locations (fender).</p>

<p class=OutlineA>4) Schedule 80 HDPE conduit for submarine cable installation 
 only.</p>

<p class=OutlineA>5) 3/4 inch minimum size liquid-tight flexible metal 
 conduit for the connection of motors, limit switches, and other devices 
 that must be periodically adjusted in position. Limit liquid-tight flexible 
 metal conduit to 2 feet in length and specify a bonding jumper.</p>

<p class=OutlineA>B. Specify conduit supports at no more than 5 foot spacing.</p>

<p class=OutlineA>C. Show no more than the equivalent of three 90-degree 
 bends between boxes.</p>

<h3><a name=SDG_8_7_14_Service_Lights></a>8.7.16 Service Lights [LRFD-MHBD 
 8.11]</h3>

<p class="whs9">Provide minimum of 20 foot-candles in all 
 areas of the machinery platform. (<a href="javascript:void(0);" id="a9" onMouseOver="if (parseInt(navigator.appVersion) >= 4 && typeof(BSPSPopupOnMouseOver) == 'function') BSPSPopupOnMouseOver(event);" class="BSSCPopup" onclick="BSSCPopup('sdg8.9movbrdgmaintainability.htm');return false;">See <span style="font-weight: bold; font-style: italic;"><I><B>SDG</B></I></span> 
 8.9.11</a><script type="text/javascript"
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<h3><a name=SDG_8_7_15_Nav_Lights></a>8.7.17 Navigation Lights [LRFD-MHBD 
 1.4.4.6.2]<a class="expandspot" href="javascript:kadovTextPopup(this)" id="a11">(01/08)</a><span class=expandtext style="display: 'none';" id=POPUP195089437 >   2008 Jan - Added B. &quot;LED Fixtures.&quot;</span></h3>

<p class=OutlineA>A. Design a complete navigation light and aids system 
 in accordance with all local and federal requirements and <span style="font-weight: bold; font-style: italic;"><I><B>Standard 
 Drawing No. 1211</B></I></span>. Comply with the latest edition of the <span style="font-weight: bold; font-style: italic;"><I><B>Code 
 of Federal Regulations</B></I></span> (CFR) 33, Part 118, and Coast Guard Requirements. 
 (<a href="javascript:void(0);" id="a10" onMouseOver="if (parseInt(navigator.appVersion) >= 4 && typeof(BSPSPopupOnMouseOver) == 'function') BSPSPopupOnMouseOver(event);" class="BSSCPopup" onclick="BSSCPopup('sdg8.9movbrdgmaintainability.htm');return false;">See <span style="font-weight: bold; font-style: italic;"><I><B>SDG</B></I></span> 
 8.9.14</a><script type="text/javascript"
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<p class=OutlineA>B. Specify the use of LED fixtures.</p>

<h3><a name=SDG_8_7_16_Grounding></a>8.7.18 Grounding and Lightning Protection 
 [LRFD-MHBD and 8.13]</h3>

<p class=OutlineA>A. Provide the following systems:</p>

<p class=OutlineA1>1.) Lightning Protection System: Design per the requirements 
 of <span style="font-weight: bold; font-style: italic;"><I><B>NFPA 780 Lightning 
 Protection Code</B></I></span>. Protect the bridge with Class II materials. </p>

<p class=OutlineA1>2.) Surge Suppression System: Design Transient Voltage 
 Surge Suppressor (TVSS) system to protect all power, control, signaling, 
 and communication circuits and all submarine conductors that enter or 
 leave the control house. It is imperative to maintain proper segregation 
 of protected and non-protected wiring within the Bridge Tender House. 
 </p>

<p class=OutlineA1>3.) Grounding and Bonding System: All equipment installed 
 on the bridge/project must be bonded together by means of a copper bonding 
 conductor which runs the entire length of the project (Traffic Light to 
 Traffic Light). All metal bridge components (i.e., handrail, roadway light 
 poles, traffic gate housings, leafs, etc.) will be connected to the copper-bonding 
 conductor. The copper-bonding conductor must remain continuous across 
 the channel by means of the submarine bonding cable. </p>

<p class=OutlineA>B. Require earth grounds at regular intervals with no 
 less than two driven grounds at each pier and one driven ground at each 
 overhead traffic light structure and traffic gate. Test all driven grounds 
 to a maximum of 5 ohms to ground.</p>

<p class=OutlineA>C. All main connections to the copper-bonding conductor 
 must be cadwelded.</p>

<p class=OutlineA>D. In areas where the copper-bonding conductor is accessible 
 to non-authorized personnel, it must be enclosed in Schedule 80 PVC conduit 
 with stainless steel supports every 5 feet.</p>

<h3><a name=SDG_8_7_Signals></a>8.7.19 Movable Bridge Traffic Signals and 
 Safety Gates [LRFD-MHBD 1.4.4]</h3>

<p class="whs9">Refer to <a href="http://www.fdot.gov/roadway/Design Standards/Standards.htm"
										target=_blank>Design Standard</a><span 
 style="font-weight: bold;"> <B></B></span>17890 for Traffic Control Devices for 
 Movable Span Bridge Signals.</p>

<h3><a name=SDG_8_7_Communications></a>8.7.20 Communications Systems</h3>

<p class="whs9">Design and specify a Public Address System, 
 an Intercom System, and a Marine Radio System for each movable bridge. 
 The three systems must work independent of each other and meet the following 
 criteria:</p>

<p class=OutlineA>A. Public Address System: One-way handset communication 
 from the operators console to multiple zones (marine channel, roadway, 
 machinery platforms, and other rooms). Specify an all call feature so 
 that the operator may call all zones at once. Specify and detail loudspeakers 
 mounted on the pier wall facing in both directions of the channel, one 
 loudspeaker mounted at each overhead traffic signal, facing the oncoming 
 gate, and loudspeakers at opposite ends of the machinery platform.</p>

<p class=OutlineA>B. Intercom System: Two-way communication system that 
 will work similar to an office telephone system with station-to-station 
 calling from any station on the system and all call to all stations on 
 the system from the main intercom panel. Each station must have a hands 
 free capability. A call initiated from one station to another must open 
 a channel and give a tone at the receiving end. The receiving party must 
 have the capability of answering the call by speaking into the open speaker 
 channel, or by picking up the local receiver and speaking into it. All 
 intercom equipment must be capable of operation in a high noise, salt 
 air environment. A handset must be mounted adjacent to the control console, 
 in each room on the bridge and on each machinery platform. </p>

<p class=OutlineA>C. Marine Radio System: Hand held, portable, operable 
 on or off the charger, tuned to the proper channels, and a 120-volt charger 
 located adjacent to the operator's console.</p>

<h3><a name=SDG_8_7_Functional_Checkout></a>8.7.21 Functional Checkout 
 </h3>

<p class=OutlineA>A. Develop and specify an outline for performing system 
 checkout of all mechanical/electrical components to insure contract compliance 
 and proper operation. Specify in-depth testing to be performed by the 
 Contractor.</p>

<p class=OutlineA>B. Functional testing for the electrical control system 
 consists of two parts. Perform the first part before delivery and the 
 second part after installation on the bridge. Both tests must be comprehensive. 
 Perform the off-site functional testing to verify that all equipment is 
 functioning as intended.</p>

<p class=OutlineA>C. All repairs or adjustments must be made before installation 
 on Department property. All major electrical controls must be assembled 
 and tested in one place, at one time. The test must include as a minimum: 
 control console, PLC, relay back-up system, Motor Control Center, and 
 all other equipment required, in the opinion of the Electrical Engineer 
 of Record, to complete the testing to the satisfaction of the SDO.</p>

<p class=OutlineA>D. If not satisfactory, repeat the testing at no cost 
 to the Department. All equipment must be assembled and inter-connected 
 (as they would be on the bridge) to simulate bridge operation. No inputs 
 or outputs must be forced. Indication lights must be provided to show 
 operation and hand operated toggle switches may be used to simulate field 
 limit switches.</p>

<p class=OutlineA>E. After the off-site testing is completed to the satisfaction 
 of the SDO, the equipment may be delivered and installed. The entire bridge 
 control system must be re-tested before the bridge is put into service. 
 The field functional testing must include, but is not necessarily limited 
 to, the off-site testing procedure.</p>

<p class=OutlineA>F. Test all brakes, prior to the first operation of a 
 bridge leaf with the motors, for correct torque settings. Test all brake 
 controls and interlocks with motor controls for correct operation. Do 
 not operate the leaf, even for “testing” purposes, with brakes manually 
 released or with interlocks bypassed.</p>

<h3>8.7.22 Functional Checkout Tests</h3>

<p class="whs9">As a minimum, perform the following tests 
 of Control Functions for both manual and semi-automatic operations:</p>

<p class="whs10">Commentary: <span style="font-style: italic;"><I>The 
 Electrical Engineer of Record is encouraged to include tests for other 
 equipment not included in the minimum tests listed below.</I></span></p>

<p class=OutlineA>A. Demonstrate the correct operation of the bridge sequence 
 as described in the Technical Special Provisions and in the drawings. 
 </p>

<p class=OutlineA>B. Demonstrate EMERGENCY STOP of each span (leaf) at, 
 or during, each phase of opening and closing the bridge (phases include 
 ramping up or down, full-speed, and creep-speed). </p>

<p class=OutlineA>C. Demonstrate EMERGENCY STOP does prevent energization 
 of all rotating machinery in any mode of operation. </p>

<p class=OutlineA>D. Demonstrate that the leafs do not come to a sudden 
 stop on a power failure.</p>

<p class=OutlineA>E. Interlocks:</p>

<p class=OutlineA1>1.) Simulate the operations of each limit switch to 
 demonstrate correct operation and interlocking of systems. </p>

<p class=OutlineA1>2.) Demonstrate BYPASS operation for each failure for 
 each required bypass. </p>

<p class=OutlineA1>3.) Simulate each failure for which there is an alarm 
 message to demonstrate correct message displays. </p>

<p class=OutlineA1>4.) Testing of interlocks must be sufficient to demonstrate 
 that unsafe or out of sequence operations are prevented. </p>

<p class=OutlineA1>5.) Observe Position Indicator readings with bridge 
 closed and full open to assure correct readings.</p>

<p class=OutlineA>F. Navigation Lights:</p>

<p class=OutlineA1>1.) Demonstrate that all fixtures are working.</p>

<p class=OutlineA1>2.) Demonstrate proper change of channel lights from 
 red to green. </p>

<p class=OutlineA1>3.) Demonstrate Battery Backup by simulating a power 
 outage.</p>

<p class=OutlineA>G.) Traffic Gates:</p>

<p class=OutlineA1>1.) Demonstrate proper operation of each gate arm.</p>

<p class=OutlineA1>2.) Demonstrate opening or closing times. Time should 
 not exceed 15 seconds in either direction. </p>

<p class=OutlineA1>3.) Demonstrate that gate arms are perpendicular to 
 the roadway when RAISED and parallel to the roadway when LOWERED.</p>

<p class=OutlineA1>4.) Demonstrate that Traffic Lights turn RED when a 
 gate arm is manually lowered.</p>

<p class=OutlineA>H. Span Locks:</p>

<p class=OutlineA1>1.) Operate each span lock through one complete cycle 
 and record, with chart recorder, motor power (watts) throughout the operation, 
 record lockbar to guide and lockbar to receiver, clearances.</p>

<p class=OutlineA1>2.) Demonstrate pulling and driving times. Time should 
 not exceed 10 seconds in either direction. </p>

<p class=OutlineA1>3.) Operate each lock with hand crank or manual pump 
 for one complete cycle.</p>

<p class=OutlineA>I. Emergency Power:</p>

<p class=OutlineA1>1.) The complete installation must be initially started 
 and checked-out for operational compliance by a factory-trained representative 
 of the manufacturer of the generator set and the Automatic Transfer Switch. 
 The supplier of the generator set must provide the engine lubrication 
 oil and antifreeze recommended by the manufacturer for operation under 
 the environmental conditions specified. </p>

<p class=OutlineA1>2.) Upon completion of initial start-up and system checkout, 
 the supplier of the generator set must notify the Engineer in advance 
 and perform a field test to demonstrate load-carrying capability, stability, 
 voltage, and frequency. </p>

<p class=OutlineA1>3.) Specify a dielectric absorption test on generator 
 winding with respect to ground. A polarization index must be determined 
 and recorded. Submit copies of test results to the Engineer. </p>

<p class=OutlineA1>4.) Phase rotation test must be made to determine compatibility 
 with load requirements. </p>

<p class=OutlineA1>5.) Engine shutdown features such as low oil pressure, 
 over-temperature, over-speed, over-crank, and any other feature as applicable 
 must be function-tested. </p>

<p class=OutlineA1>6.) In the presence of the Engineer, perform resistive 
 load bank tests at one hundred percent (100%) nameplate rating. Loading 
 must be 25%-rated for 30 minutes, 50%-rated for 30 minutes, 75%-rated 
 for 30 minutes, and 100%-rated for 2 hours. Maintain records throughout 
 this period and record water temperature, oil pressure, ambient air temperature, 
 voltage, current, frequency, kilowatts, and power factor. The above data 
 must be recorded at 15-minute intervals throughout the test.</p>

<p class=OutlineA>J. Automatic Transfer Switch: Perform automatic transfer 
 by simulating loss of normal power and return to normal power. Monitor 
 and verify correct operation and timing of: normal voltage sensing relays, 
 engine start sequence, time delay upon transfer, alternate voltage sensing 
 relays, automatic transfer operation, interlocks and limit switch function, 
 timing delay and retransfer upon normal power restoration, and engine 
 shut-down feature.</p>

<p>K. Programmable Logic Controller (PLC) Program:</p>

<p class=OutlineA1>1.) Demonstrate the completed program's capability prior 
 to installation or connection of the system to the bridge. Arrange and 
 schedule the demonstration with the Engineer and the Electrical Engineer 
 of Record. </p>

<p class=OutlineA1>2.) A detailed field test procedure must be written 
 and provided to the Electrical Engineer of Record for approval. Provide 
 for testing as listed below:</p>

<p class=OutlineA1a>a.) Exercise all remote limit switches to simulate 
 faults including locks, gates, traffic lights, etc. Readouts must appear 
 on the alphanumeric display. </p>

<p class=OutlineA1a>b.) When the local testing of all individual remote 
 components is completed, check all individual manual override selections 
 for proper operation at the console. When all override selections have 
 been satisfactorily checked-out, switch the system into semi-automatic 
 (PLC) mode and exercise for a full raise and lower cycle. Verify that 
 operation is as diagrammed on the plan sheet for the sequence of events. 
 </p>

<p class=OutlineA1a>c.) Initiate a PLC sequence of operation interweaving 
 the by-pass functions with the semi-automatic functions for all remote 
 equipment. </p>

<p class=OutlineA1a>d.) Remove the power from the input utility lines. 
 The Automatic Transfer Switch (ATS) should activate the engine-generator 
 to supply power. Raise and lower the bridge again. The bascule leafs should 
 operate in sequence; i.e., two adjacent bascule leafs at a time. Upon 
 completion of the test, re-apply utility power to ATS. The load should 
 switch over to utility for normal operation. </p>

<p class=OutlineA1a>e.) Certify that all safety features are included in 
 the program, and that the program will not accept commands that are contrary 
 to the basic sequence diagram. Submit failure mode testing as part of 
 the written field test procedure.</p>

<p>&nbsp;</p>

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