SPECIAL SPECIFICATION 6150 Fiber Communications HUB Building Replacement

Transcription

1 2004 Specifications Dallas District SPECIAL SPECIFICATION 6150 Fiber Communications HUB Building Replacement 1. Description. This specification shall govern for the replacement of a Fiber Communications Hub Building. 2. General. Furnish an experienced and adequate crew with the appropriate equipment to perform the work in a safe and timely manner. The Contractor and his/her employees shall wear appropriate personal protective equipment (i.e., fluorescent vest, hard hat, steel-toed shoes, etc.) at all times while outside of vehicles on the project. All personal protective equipment shall conform to OSHA requirements. Upon completion of the work and before final acceptance and final payment is made, the Contractor shall clear and remove from the site all surplus and discarded materials and debris of every kind which has been generated by his work and shall leave the entire project in a smooth and neat condition. 3. Equipment. Furnish all equipment, tools, and machinery necessary for the proper prosecution of the work. The equipment, tools, and machinery shall be on the work site in good repair and operating condition prior to beginning work. If at any time, the Engineer determines any equipment is defective to the point that it may affect the quality of the work, the equipment shall be immediately repaired or replaced. 4. Materials. Furnish all materials such as anchor bolts, conductors, etc. All such materials furnished by the Contractor shall be new and shall conform to the pertinent requirements of the 2004 Standard Specifications for Construction of highways, Streets, and Bridges and the latest version of the National Electric Code. All materials shall meet the applicable design requirements of the Texas Manual on Uniform traffic Control devices. Fiber Communications Hub Building 1. Description. This Item shall govern for the furnishing and installation of Communications Hub Building as shown on the plans, as detailed in this Special Specification and as directed by the Engineer. These buildings shall house the various surveillance and control equipment required for the system. Upon completion of the work, each building shall be properly installed and tested. 2. Submittal Components. As a minimum, the submittal for this Item shall completely address the following:

2 A. Hub building shop drawing showing: 1. dimensions 2. doors 3. mounting channel 4. shelving 5. conduit routing 6. material list 7. exterior finish 8. door lock 9. door pin switches B. Power cable terminals C. Terminal blocks D. Grounding E. Environmental parameters F. Wiring diagrams of all building panels G. Fan assembly and thermostat H. Air filter I. Light fixtures J. Building foundation drawing K. Power distribution panel L. Transient, surge and power line emi suppressors N. Circuit breakers 3. Materials. Overall floor dimensions of the structure shall be 7 ft. x 8 ft., or as required on the plans. The building shall fully meet the requirements of this Specification and shall be base mounted. Components, back and side panels, terminal strips, harnesses, and connectors as well as mounting hardware necessary to provide for installation of equipment as described herein and on the plans. The building shall be constructed using unpainted sheet aluminum with a minimum thickness of in. The building shall be designed to withstand a 100 miles per hour wind load. The exterior of the building shall be unpainted and the interior shall be painted white. All external screws, nuts and locking washers shall be stainless steel. No self tapping screws shall be used unless specifically approved by the Engineer. All parts shall be made of corrosion resistant material, such as plastic, stainless steel, aluminum or brass. All materials used in construction shall be resistant to fungus growth and moisture deterioration. Dissimilar metals shall be separated by an

3 inert dielectric material. No wood, wood fiber product, or flammable products shall be allowed in the building. Buildings shall conform to the requirements of ASTM designation: B209 for 5052-H32 aluminum sheet. Welding on aluminum buildings shall be done by the gas metal arc (MIG) or gas tungsten arc (TIG) process using bare aluminum welding electrodes. Electrodes shall conform to the requirements of the American Welding Society (AWS) A5.10 for ER5356 aluminum alloy bare welding electrodes. Procedures, welding machines and welding machine operators for welding on aluminum shall be qualified in accordance with the requirements of AWS B3.0, Welding Procedures and Performance Qualification, and to the practices recommended in AWS C5.6. The building shall be completely weatherproofed to prevent the entry of water, dust and dirt. All unwelded seams shall be sealed with a clear or aluminumcolored weather-seal compound. The building shall be equipped with shelves for supporting all shelf-mounted equipment as shown on the plans. The shelves shall be mounted on unistrut or keyhole channels or equal. The shelves shall be at least 10 in. deep and be located in the building to provide a 1/2 in. clearance between the back of the shelf and wall. The shelves shall be supported at least every 2 ft. of shelf length. The building shall be tamper resistant and have a full size main door to allow entry while standing up. The door shall be equipped with filtered vent openings. The doors and hinges shall be braced to withstand a 50 lb. per vertical foot of door height load applied vertically to the outer edge of the door when standing open. There shall be no permanent deformation or impairment of any part of the door or building body when the load is removed. Provisions shall be designed to hold the doors open at approximately the 90 degree and 180 degree positions. The door shall be equipped with a UL listed lock having the following features: A guard bolt which deadlocks the latch bolt, an inside knob which will always open the lock, and a toggle or other device on the inside which will prevent the outside knob from retracting the latch bolt. An example is the Sargent Function 05. The Contractor shall provide 2 keys for the lock. A chain shall be provided to limit the opening of the door. All buildings shall be keyed alike. A gasket shall be provided to act as a permanent dust and weather resistant seal at the building door facings. The gasket material shall be of a non-absorbent material and shall maintain its resiliency after long term exposure to the outdoor environment. The gasket shall have a minimum thickness of 3/8 in., and shall be located in a channel provided for this purpose either on the building or on the

4 door(s). A channel formed by an L bracket and the door lip is acceptable. In any case, the gasket must show no sign of rolling or sagging and must insure a uniform dust and weather resistant seal around the entire door facing. Any other method is subject to the Engineer's approval during inspection of an order. The building shall be vented and cooled by a thermostatically controlled fan. The fan shall have a minimum capacity of 600 cu. ft. per minute. The thermostat shall be an adjustable type with an adjustment range of 90ºF to 135ºF. A press-to-test switch shall be provided to test the operation of the fan. The fan shall be a 12 in. commercially available model and shall be designed to operate reliably over the temperature range of -30ºF to 165ºF. The intake for the vent system shall be filtered with a 16 in. (wide) by 25 in. (high) by 1 in. (thick) air conditioning filter. The filter shall be securely mounted so that any air entering the building must pass through the filter. The building opening for intake of air shall be screened to prevent entry of insects and shall be large enough to use the entire filter. The screen shall have openings no larger than sq. in. The total free air opening of the vent shall be large enough to prevent excessive back pressure on the fan. One industrial type fluorescent light fixture with white porcelain enamel reflector and 4, ft. fluorescent lamps shall be mounted in the building. The light shall be provided with an on-off switch. The light shall be positioned to provide illumination to all maintenance areas of the building. Details of the building design shall be submitted to the Engineer for review and approval prior to fabrication. The Contractor shall submit a building layout for each building location for approval by the Engineer. Only buildings with an approved layout will be accepted under this project. The equipment, design and construction shall utilize the latest available techniques with a minimum number of different parts, subassemblies, circuits, cards and modules to maximize standardization and commonality. The equipment shall be designed for ease of maintenance. All component parts shall be readily accessible for inspection and maintenance. 4. Electrical Requirements. A. Distribution Panel. The buildings shall be furnished with a U.L. listed single phase, 3 wire, 120/240, 100 ampere main circuit breaker, 12 circuit indoor surface mounted power distribution panel mounted on the inside wall of the building. The Contractor shall provide a detailed layout for

5 approval by the Engineer. Panel shall be Square D QO series or equal. All wiring shall be installed as per National Electrical Code. 1. Receptacles. Receptacles shall be installed as shown on the plans. All receptacles shall have circuit breaker protection. Electronic equipment receptacles shall be NEMA type 5-20R or as required to match electronic equipment plugs. Convenience outlets shall be NEMA type 5-20R and shall have Ground Fault Circuit Interrupter protection. 2. Circuit Breakers. Circuit breakers shall be installed as shown on the plans. The circuit breakers shall be from the same manufacturer as the distribution panel. All spare breaker spaces shall have 20 ampere breakers installed. Circuit breakers shall be unaffected by ambient temperature range, relative humidity, applied power, shock and vibration range specified in Section 2, Environmental Standards and Test Procedures, of NEMA TS1-1989, latest revision. Circuit breakers shall have an interrupt capacity of 10,000 amperes and insulation resistance of 100 Megs at 500 Volts DC. The circuit breakers shall be equipped with solderless connectors and installed in such a manner that their rating markings shall be visible and the breaker shall be easily accessible. The above breakers are in addition to any auxiliary fuses which may be furnished with the electronic equipment to protect component parts. The load side of all circuit breakers shall be protected by an EDCO Model SHP S or equivalent 3 terminal lightning arrestor. Number 8 AWG or larger stranded copper conductors shall be used to connect the arrestor into the circuit. The arrestor shall be connected to the line filter as recommended by the manufacturer. 3. Radio Interference Suppressor. All buildings shall be equipped with a radio interference suppressor installed on the load side of each electronic equipment circuit breaker. The suppressor shall provide a minimum attenuation of 50 decibels over a frequency range of 200 kilohertz to 75 megahertz. The suppressor shall be hermetically sealed in a substantial metal case, then filled with a suitable insulation compound. The suppressor terminals shall be nickel plated brass studs of sufficient external length to provide space for connection of 2 appropriately sized conductors and shall be mounted so that the terminals cannot be turned in the case. The suppressors shall be designed for operation at the proper current rating as determined by the Contractor per the plans. The

6 suppressors shall be designed for operation at the proper current rating as determined by the Contractor per the plans. The suppressors shall be designed for 120 volts, 60 hertz, operation and shall be approved by UL and EIA. 4. Power Line Surge Protection. Power line surge protectors shall be installed in each building between the line conductors and ground. Power line surge protectors shall be provided and installed as described herein. One surge protector shall be a 3 electrode gas tube type and shall have the following ratings: Impulse Breakdown: Less than 1,000 volts in less than 0.1 microseconds at 10 Kilovolts/microsecond. Standby Current: Less than 1 milliampere. Striking Voltage: Limit any voltage greater than 212 volts dc. Capable of withstanding 15 pulses of peak current, each of which will rise in 8 microseconds and fall in 20 microseconds to 1/2 the peak voltage, at 3 minute intervals. Peak current rating shall be 20,000 amperes. The surge protector shall utilize both metal oxide varistors and silicon avalanche diodes to protect against transients having a single surge energy level up to 70 joules, voltage transients up to 6 kv and current transients up to 6 ka. Protection shall be provided for line to neutral, line to ground and neutral to ground terminals. The protectors shall have the following ratings: Recurrent peak voltage volts. Energy rating minimum joules. Power dissipation - average 0.85 watts. Peak current for pulses of less than 6 microseconds - 20,000 amperes. Standby current - less than 1 milliampere. 5. Power Cable Input Junction Terminals. A barrier terminal block with a minimum of 2 terminals and 1 compression fitting designed to accept up to a No. 2 AWG stranded wire shall be provided for the power supply lines. The block shall be rated at 100 amperes and shall have double binder head screw terminals. The AC neutral and equipment ground wiring shall be electrically isolated from the line wiring by an insulation resistance of at least 10 megohms when measured at the AC neutral. The AC neutral

7 and equipment grounding wiring shall be color coded white and green, respectively. B. Back Panel. Each building shall include fully wired equipment panels to be mounted on the inside wall of the building. The Contractor shall provide a detailed layout for approval by the Engineer. C. Wiring. The building shall be fully wired and all wiring within the building shall be neatly wrapped and routed such that opening and closing the door or raising or lowering the back panel will not twist or crimp the wiring. No cable pressure points shall be present. All wires shall be cut to the proper length before assembly. No wires shall be doubled back to take up slack. Harnesses to connectors shall be covered with PVC sheathing, woven braid or braided. Cables shall be secured with nylon cable clamps. Cable slack shall be provided to facilitate removal and replacement of assemblies, panels and modules. All harnesses and wiring shall be color coded. In addition, each wire in every harness shall be hot-stamped every 4 in. with a number indicating the pin number of the connector that the wire is connected to. Harnesses with connectors with pins identified by letters shall be stamped with numbers that correspond to the alphabetic sequence of the pins. Each harness shall be cross-referenced to a chart on the building print that lists the connector pin letter or number, the wire number, the terminal number that the wire is connected to and the function of the wire. Each harness shall then be enclosed in PVC sheathing, woven braid or braided. Individual conductors in detector harnesses shall be exempt from the requirements for hot-stamping. Tie wraps, tape or other cable ties are not acceptable. All electrical connections in the building, including relays, flashers, terminal strips, etc., shall have sufficient clearance between each terminal and the building to provide an adequate distance to prevent a leakage path or physical contact under stress. All equipment grounds shall run directly and independently to the ground bus. The lay of the interconnect cable between the components must be such that when the door is closed, it does not press against the cables or force the cables against the various components inside the buildings. Sufficient length of cable shall be provided to easily reach the electronic equipment placed anywhere on the shelves. All wiring containing line voltage AC shall be routed and bundled separately and/or shielded from all low voltage, i.e., control circuits. All

8 conductors and live terminals or parts, which could be hazardous to maintenance personnel, shall be covered with suitable insulating material. All conductors used on the building wiring shall be stranded No. 22 AWG or larger. Conductors shall conform to MIL SPEC MIL-W , Type B or D. The insulation shall have a minimum thickness of 10 mils. All wiring containing line voltage shall be a minimum size of No. 14 AWG. All AC service lines shall be of sufficient size to carry the maximum current of the circuit or circuits they are provided for. Conductors for AC common shall be white. Conductors for equipment ground shall be green. All other conductors shall be a color different than the foregoing. All electrical circuits shall utilize grounding conductors and shall not rely on conduit as sole means of grounding. The ground conductor shall be sized according to the N.E.C. and shall have green insulation. D. Terminal Blocks. Terminal blocks located on the panels shall be accessible to the extent that it shall not be necessary to remove the electronic equipment from the cabinet to make an inspection or connection. Terminal blocks shall be 2 position, multiple pole barrier type. Shorting bars shall be provided in each of the positions provided along with an integral marking strip. Terminal blocks shall be so arranged that they shall not upset the entrance, training and connection of incoming field conductors. All terminals shall be suitably identified by legends permanently affixed and attached to the terminal blocks. Not more than 3 conductors shall be brought to any 1 terminal screw. No electrically energized components or connectors shall extend beyond the protection afforded by the barriers. All terminal blocks shall be located below the shelves. Terminals used for field connections shall secure conductors by means of a No nickel or cadmium plated brass binder head screw. Terminals used for interwiring connections, but not for field connections, shall secure conductors by means of a No nickel plated brass binder head screw. As a minimum, all connections to and from the electronic equipment shall terminate to an interwiring type block. These blocks will act as intermediate connection points for all electronic Input/Output. All terminals shall be permanently identified in accordance with the building wiring diagram. Where through-panel solder lugs or other suitable connectors are used, both sides of the panel shall be permanently attached and as close to the terminal strip as possible and shall not be

9 affixed to any part which is easily removable from the terminal block panel. E. Solid State Load Switches. The load switches shall be solid state and shall have no moving parts. The load switches shall meet the requirements set forth in Section 5 of NEMA Standard TS1-1989, latest revision, and shall be triple signals load switch type. An indicator light for each circuit shall be provided on each load switch. The indicator light shall be on when a true input to the load switch is present. The load switches shall be capable of operation at 10 amperes of tungsten lamp load over the specified temperature range. F. Building Internal Grounding. The building internal ground shall consist of 1 or more ground bus-bars permanently affixed to the building and connected to the grounding electrode. Bare stranded No. 1/0 AWG copper wire shall be used between the bus-bars and between bus-bar and grounding electrode. Each copper ground bus-bar shall have a minimum of 20 connector points, each capable of securing at least 1 No. 10 AWG conductor. AC neutral and equipment ground wiring shall return to these bus-bars. G. Transient Suppression. Transient suppression devices shall be placed on the coil side of all relays in the building. DC relay coils shall have, as a minimum, a reverse biased diode across the coil. AC relays shall have MOV's or equivalent suppression across their coils. H. Surge Protection. 1. Protector and Building Configuration. All ungrounded conductor wires entering or leaving the building shall be provided with surge protectors. The conductor leads and the surge protector leads shall be kept as short as possible with all conductor bends formed to the maximum possible radius. The protector units shall be located as near as possible to the entry or exit point, and as far as possible from any electrical equipment. The protector ground lead shall be connected directly to the ground bus. The surge protector utilized for AC power shall not dissipate any energy and shall not provide any series impedance during standby operation. The unit shall return to its non-shunting mode after the passage of any surge and shall not allow the shunting of AC power. 2. Signal Head Lamp Wires. All signal light interconnect conductors shall be provided with surge protectors in the building

10 The surge protector shall have the same characteristics as that specified in Section 4.A.4 of this Specification. 3. Vehicle Detector Loop Lead-In. Each vehicle detector lead-in cable shall be provided with surge protection. In addition, the drain wire of the lead-in cable shall be connected to the building ground bus. 4. Signal Wires. Each signal wire entering or leaving the building shall have 2 stage surge protection with the following characteristics: a. Protector shall have input, output and groundconnections; b. Peak surge handling capability: 4,000 amps, 8 X 20 microsecond waveform; c. Protector life: Shall withstand a minimum of fifty 2,000 amp, 8 X 20 waveform surges. d. Response time: Calculated element speed of 1 X seconds, measured speed of less than 20 nanoseconds. e. Protector clamp voltage: shall be specified by the Contractor so as to be consistent with the equipment being protected and submitted to the Engineer for approval. I. Environmental Design Requirements. The buildings shall meet all of its functional requirements during and after subjection to any combination of the following requirements: 1. Ambient temperature range of 0ºF to 158ºF. 2. Temperature shock not to exceed 30ºF per hour, during which the relative humidity shall not exceed 95%. 3. Relative humidity range not to exceed 95% over the temperature range of 40ºF to 110ºF. 4. Moisture condensation on all surfaces caused by temperature changes. 5. Scope of Work. The replacement fiber communications hub building (Hub) will be provided by the Contractor. No existing equipment will be removed or relocated from the damaged Hub without prior approval from the Engineer. Upon approval from the Engineer remove all equipment from existing hub building in preparation for removal of hub building. The Contractor and Engineer shall note any

11 damage equipment before removal. The Contractor shall store the equipment until time to reinstall back in the new hub building. Existing cabling in a Hub typically consists of fiber optic cable, electrical conductors, communication cable, and loop detector lead-in cable. Detach all existing cabling in the damaged Hub interior in preparation for the damaged Hub removal in a method approved by the Engineer. Any damage to existing cabling caused by the Contractor s operations will be repaired or replaced at his expense. Disconnect power to hub building and remove the power distribution panel with breakers from the damaged Hub. Detach the damaged Hub and remove it from the concrete foundation in a method approved by the Engineer. Extreme caution will be taken by the Contractor during the damaged Hub removal process to avoid damaging any existing equipment or cabling. Any damage to existing equipment or cabling caused by the Contractor s operations will be repaired or replaced at his expense. Install the replacement Hub on the existing concrete foundation in a method approved by the Engineer. Extreme caution will be taken by the Contractor during the replacement Hub installation process to avoid damaging any existing equipment or cabling. Any damage to existing equipment or cabling caused by the Contractor s operations will be repaired or replaced at his expense. The existing 3/4 in. anchor bolts in the existing Hub foundation will be cut off level with the concrete. Drill and install new 3/4 in. anchor bolts in the concrete foundation for the replacement Hub. The replacement Hub will be grounded to the existing 5/8 in. ground rod adjacent to the foundation using no. 6 AWG bare conductor cable. The replacement Hub will be permanently sealed to the foundation using an acceptable silicone compound to prevent the entry of water, air, dust, and dirt. Install the power distribution panel with breakers in the replacement Hub and wire it for electrical power using the existing electrical conductors. Reconnect power to hub building upon completion of electrical installation and inspection. Attach the existing fiber optic cable to the wall of the replacement Hub in a method approved by the Engineer. Test the fiber optic cable with an Optical Time Domain Reflectometer (OTDR) to ensure functionality as directed by the Engineer. The test results will be provided to the State. Reinstall all undamaged equipment from the damaged hub. The Contractor shall replace damage equipment as was previously noted during removal

12 The Contractor shall test and demonstrate equipment functions. All damaged material becomes the property of the Contractor which shall be disposed of in a method approved by the Engineer. Upon completion, the work shall present a neat, professional finished appearance. Safe construction practices shall be maintained. Work is to be performed during daylight hours only. 6. Traffic Control. All traffic control shall be provided by the Contractor in accordance with the Texas Manual on Uniform Traffic Control Devices. All work shall be performed under existing traffic conditions with a minimum interference with the facility. All barricades and warning signs shall have Type C high density sheeting. All warning signs shall be 48 in. x 48 in. Equipment shall not be left within 30 ft. of the travel lane during nonworking hours. Arrowboards will be required as directed by the Engineer. No lane or ramp closure will be permitted during the peak hours of 6:00 A.M. to 9:00 A.M. and 3:30 P.M. to 7:00 P.M. on Mondays through Fridays. Written notification of any main lane or frontage road temporary lane closure must be submitted to the Engineer, for approval and dissemination to the public, before 3:00 P.M., on the working day prior to the date of the anticipated temporary lane closure. All notification shall be typed and contain the following specific information: date and time of closure, roadway and direction for closed lane, the operations of work within the closure, and the names of cross-streets between which the closure takes place. Temporary lane closures not appearing on the list will not be permitted. 7. Measurement. Fiber Communications Hub Building Replacement will be measured by the lump sum (LS) for all items dictated by this specification complete in place and made fully operational. 8. Payment. The work performed and materials furnished in accordance with this Specification and measured as provided under Measurement will be paid for at the lump sum bid price for Fiber Communications Hub Building Replacement for the location specified, upon satisfactory completion of all work. This price shall be full compensation for all equipment described under this item; for all materials; for all traffic control; for all clean-up work; and for furnishing all labor, equipment, tools, materials, and incidentals necessary to complete the work