Statement of Work

Project Location: Building 9100, Maneuver Area Training Equipment Site (MATES), Fort Carson, CO

Type Project: Electrical, mechanical and potential structuralmodifications to support the installation of de-stratification fans and building automation system (BAS) controls in the maintenance bays.

Date: 2 August 2013

Please note that a Summary of General Requirements for basic construction procedures can be located in Supplement A.

Project Summary: The Department of Military and Veterans Affairs (DMVA) intends to design and install de-stratification fans and associated building automation controls in the maintenance bays and carpenter shop of building 9100 (MATES) on Fort Carson Army Base. The most effective and cost efficient design will be provided by the contractor and approved by DMVA. This work shall be a complete installation with electrical wiring included. This consists of engineering structural and electrical connections, installing the product, connecting the electrical and controls to the product, training and commissioning.A licensed electricianmust be utilized to run the electrical wiring to the appropriate locations and establish power connections to each fan. Provide electrical and structural shop drawings, associated specifications, and calculations prepared and sealed by licensed engineers. Drawings and calculations will be submitted to the State of Colorado Code Review Agency (contracted separately by DMVA) for review and approval. The selected contractor is responsible for acquiring and paying for all necessary permits including, but not limited to state electrical.

The selected contractor or General Contractor (GC)is required to contract Westover Corporation for the planning, installation and commissioning of the Andover Control BAS system to control and monitor these fans. There are no allowable substitutions for Andover Controls or Westover Corporation, and the project will not be awarded if the bid does not include the BAS controls work. The Westover point of contact is Josh Werbelow at 303-429-3600. The Fort Carson Post is a closed Post, pursuant to Sec. 21, Internal Security Act of 1950, 50 U.S.C. 797 and, as such, only those persons granted permission may enter. Please make sure you allow enough time and bring proper and current documents (i.e. Driver’s License, registration and proof of insurance). Commercial vehicles are required to go through Gate 3 (Academy exit from I-25) and all others through Gate 1 (Access from HWY 115).

Mechanical Work items:

The proposed fans are to be installed in three different areas which vary in size and are to be controlled by the Andover building automation system. The entire fan must be built pursuant to construction guidelines set forth by UL 507 and CSA standard 22.2. In addition, fan assembly shall be ETL certified. Big A*s Fans (BAF) is the basis of design and approved for use. However, other manufacturers such as MacroAir, RiteHiteFans and AirMotion Sciences serve as an approved alternative. The Organizational Maintenance area will require (3) 16ft fans mounted in between the ductwork while the Support Maintenance area will require (3) 10ft fans fastened below the ducts and above the crane, and (1) 10ft fan will be installed in the Carpenter Shop. Contractor must validate fan size applicability in the areas where they will be installed during the mandatory pre-bid walkthrough.

Other proposed products must be submitted by the contractor for substitution approval prior to bidding. For more information on product warranty and specifications, see SupplementC. The 10ft fans shall have a 1.0 HP c-face motor adaptor with a maximum speed of 113 RPM, and an airfoil length of approximately37.5 inches (2.78 m). The 16ft fans must have a 1.5 HP c-face motor with a maximum speed of 95 RPM. The max speed sound level must be less than 55 dBA. The mounting post shall be powder coated for corrosion resistance and appearance.

The motor shall be an AC induction type inverter rated at 1725 RPM, 230/460 VAC and 60 Hz for 3 phase. Ideally, the motor shall be totally enclosed, fan cooled with IP42 NEMA classification. NEMA standard frames 56C shall be provided for ease of service. Fans must be manufactured with a double baked Class F insulation and be capable of continuous operation in 30⁰F to 122⁰F ambient conditions.

The fan gearboxshall have a high efficiency, hermetically sealed, nitrogen filled, offset helical gear reducer with two stage gearing, a 2-1/2” hollow output shaft, cast iron housing, double lip seals, high quality bearings with crowned cages for optimal lubrication flow, and precision machined gearing to maintain backlash less than 11 arc-minutes over the life of the unit. Lubrication shall be of high-grade, low foaming synthetic oil with extreme pressure additives and a wide temperature range.

Electrical and Direct Digital Controls Work items:

The coordination of electrical and control wiring between the General Contractor and Westover must take place throughout the project to assure controls meet or exceed requirements. The scope of the electrical is to support the proposed mechanical installations. As this is a turnkey installation, the work performed will include hiring a licensed electrician to establish electrical wiring and a power connection to each fan. Fan installation must be in accordance with the National Electrical Code (2011), NFPA 70-2012, and all local codes. Regarding Arc Flash calculations and panel labeling, UFC supersedes NFPA for Department of Defense installations.

Each fan must be installed and wired per manufacturer’s instructions while maintaining NEC requirements. Connect AC power wiring per NEC from power source to fan location. A power connection point that will be comprised of a junction box with a 480 V or 250 V receptacle must be established. A suitable panel for this projectshall be selected, approved by the Owner, and meteredby the contractor for a period of thirty days to identify the load capacity. There is a possibility the project will require the installation of a sub-panel as the existing electrical equipment may lack space and/or capacity for an additional load. During the mandatory pre-bid walk through, the contractor will need to field verify electrical panel capacity and applicability for the addition of a sub-panel (electrical information in Supplement B). Each set of fans shall tie into one supply circuit in the panel associated with the area where the installation is taking place. Field verification will also be required to validate capacity of current transformer and switchgear. The fans must be tied in with the fire relay panel to deactivate upon the trigger of a fire alarm. If the GC is unable to perform this tie in, then work must be transferred over Westover or a separate subcontractor.

Westover must use direct digital control and control wiring for installation into the Andover Control system. All installation materials including control wiring and conduit, all necessary Andover DDC controllers, associated line voltages, installation of conduit and peripheral devices, programming, graphics, training and commissioning shall be included in the work. An override pushbutton (function to be determined at a later date) will be installed in each maintenance area. BAS points for fans and controls are listed below:

Fans (Per unit)

Fan status – 1 digital input per fan

Fan VFD feedback – 1 analog input per fan

Fan VFD fault – 1 digital input per fan

Fan VFD mod – 1 analog output per fan

Fan start/stop – 1 digital output per fan

Space temperature – 1 analog input for each area (3 total)

Space temperature (above fan) – 1 analog input per fan

Override Switch – 1 in each maintenance area

Installation requirements:

Prior to any installation, contractor shall have the structure reviewed by a licensed structural engineer to ensure the existing structure will adequately support new work (Original construction architectural and structural plans located in Supplement B).

  • Any modifications to existing structural members must be designed by a licensed structural engineer. Installation, structural drawings and calculations shall be stamped by a licensed engineer and submitted to DMVA for review. Plans will also be submitted to a State of Colorado Code Reviewer contracted separately by DMVA.
  • There is a probability in which duct hangars will need to be adjusted or relocated to accommodate the fans. If this occurs, the selected contractor is responsible for the repositioning of the duct hangars while complying with all applicable codes.
  • The General Contractor is responsible for any installed product that falls from the ceiling and associated damage. This includes but is not limited to any bolts, screws or accessories used to anchor the fans to the structure.
  • A two man 25’ scissor or boom lift will be required to reach the ceiling for mounting and setup of all the fans. Contractor shall provide an electric liftand comply with OSHA regulations.
  • Motor/controller is to be supplied as part of the fan package.
  • The design criteria for the fan mounting system shall be capable of handling 300 ft-lbs (407 N-m) of torque.
  • Roof insulation that is currently in place is to not be touched or modified.
  • Each fan to be equipped with a safety cable fabricated out of 7 x 19 stranded galvanized steel that reinforces the fan mounting assembly to the building structure.
  • Addition of angle iron or any other steel supports must be painted to match existing.
  • Upper yoke must be attached to I-Beam or theAngle Iron recommended by thestructural engineer.
  • It may be necessary to provide guy cables or struts to limit potential lateral movement of the fan. Additionally, a stiffening strut braced against an additional beam may be required if there is a close clearance situation.
  • Wall mounted controller must be installed to the nearest accessible surface such as a column, concrete wall or wood. Location of controller(s) to be approved by DMVA prior to installation.
  • For communication between fan and wall controller, provide and install CAT-6 data communications cable of at least 150 linear feet. The entire cable shall be housed in conduit.
  • Per NEC, AC power wiring coming from the electrical source to within the fan locations cannot exceed 250 linear feet, or de-rate wiring per 2011 NEC specifications.
  • A power connection point that will be comprised of a junction box with a NEMA L-16-20R (480V) or L-15-20R (250V) receptacle is to be installed.
  • Conduit shall be tied to the ceiling deck as it is run to the fan.
  • All conduit must be painted (paint shall be submitted prior to install) to match and completed by professional standards. All effort should be taken to keep conduit tight to structure.
  • Contractor shall provide start-up and operational training per manufacturer recommendations.
  • The area is to be cleaned and in operating condition as soon as the job is complete. Daily cleaning of job site is required. Additionally, the GC is to rent a rollout dumpster for construction waste and recyclable materials.

DMVA also intends to install light fixtures in both maintenance areas at the MATES facility. To reduce the risk of project overlap, this work will focus on the Operational Maintenance Area while the other project will take place in the Support Maintenance Area. Once the contractors complete their work in their location, both groups will mobilize to the opposite area to complete their project. The initial preconstruction meeting will include both the lighting and the fan contractor. One of the outcomes of this meeting is an integrated project schedule that both contractors can agree to. If during construction, one contactor causes a delay to the other contractor due to circumstances within their span of control, the contractor causing the delays will be responsible to compensate the impacted contractor any applicable and reasonable delay and/or demobilization/remobilization costs. Bid shall include option line items for said costs.

It is necessary that both the General Contractor and Westover participate in preconstruction meeting. Upon completion of the job, field verification will be required to validate functionality and validity of systems/products installed.

END OF STATEMENT OF WORK