MODIFICATION
58 -- 70 foot towers for mounting and servicing antennas
- Notice Date
- 1/6/2003
- Notice Type
- Modification
- Contracting Office
- General Services Administration, Federal Technology Service (FTS), FTS, 7T-5 Oklahoma, 819 Taylor Street, Room 14A02, Fort Worth, TX, 76102
- ZIP Code
- 76102
- Solicitation Number
- 7TF-03-0002
- Response Due
- 1/15/2003
- Point of Contact
- Elaine Lacker, Contracting Officer, Phone (817) 978-6142, Fax (817) 978-4739, - Elaine Lacker, Contracting Officer, Phone (817) 978-6142, Fax (817) 978-4739,
- E-Mail Address
-
elaine.lacker@gsa.gov, elaine.lacker@gsa.gov
- Small Business Set-Aside
- Total Small Business
- Description
- This is an amendment to the combined synopsis/solicitation number 7TF-03-0002 Request for Proposal. Questions received regarding this request for proposals, and answers, are listed below. Also, please note change in past performance evaluation regarding submittal of references. QUESTIONS AND ANSWERS 1) Actual Antennas to be mounted (model/quantity/elevation) A: Taco Antennas of various models. Require 6 position platform and the towers are to be of various heights depending on the locations. However, they must meet specifications to be lower than the platform level of the radar tower. And, they must be of standard type to match other towers already in the USAF/1St Air Force for maintenance and logistics control. 2) Lighting requirements. A: No lighting requirements but convenience outlets at bottom and platform level 3) Horizontal waveguide supports? A: None required. Vertical supports for RF/Heilax cable 4) Paint? A: No. Tower to be Galvanized 5) Wind speed towers are to be designed for. A: Varies with area but would estimate winds up to 100 MPH 6) Is ice to be considered in tower design? A: 1/2 to 3/4 inch 7) How many coax runs shall each tower support? A: Up to 8 each 7/8-in. 8) Does the Government require any unusual non-commercial inspection or assembly process documentation to be supplied with these structures? A: No 9) Does the supplied tower need only to meet requirements of the current EIA/TIA-222F recommendations? A: Yes 10) Are assembled pre-welded tower sections or antenna platform components with mounting flanges acceptable? A: Yes, assuming this is the tower only. The mounts for the antennas must be "swing out" type to meet the common spacing of antennas. 11) After fabrication, is the delivered tower to be painted, hot dip galvanized, or a combination? A: Hot Dip galvanized 12) What needs to be supplied for tower grounding? A: Tower grounding will be provided by the erection contractor. 13) In addition to providing these towers, are foundation designs required as well as a deliverable item? Yes. 14) If foundation designs are required, is the government looking for a generic design based on normal soil or a custom design based on a Government supplied furnished soils report? A: Foundation/piers that come with towers from the vendor will be used and augmented with known tower design information in the area of the project. Normally, information is available from FAA. And, there are referenced standards for different areas/soil condition. 15) Please specify when the foundation design if required is due as a deliverable. A: Within a month after contract award or with the towers. 16) Is the Government looking for these structures to be installed by the supplier within scope of this solicitation? A: No. 17) Would the government accept as an optional line item a coast for installation? A: No. 18) How many copies of tower drawings need to be supplied with the towers? A: Two 19) Are sealed drawings (stamped via PE licensed in the proposed State of Construction) required as a deliverable item. A: If towers are designed and built to normal industry standards, sealed drawings are not required. 20) Can specific model, make of antennas be provided; need to know RF Transmission line used for each antenna. A: See answer in paragraph 1 above. UHF/VHF antennas made by Taco will be used. 21) Is a microwave cable ladder need to be designed with additional expansion capability for future requirements? If yes, please furnish expansion requirements. A: This question was asked above. Answer is no. 22) Is platform description an area with a minimum of 42 sq. feet of overall footprint surface area, or a platform where there is a minimum 42 sq.feet of overall materials? A: Platforms are normally described as the surface area, i.e., 6-ft by 8-ft with railings at a height of app 42-in to 48-inches. Platforms are designed to permit spacing for antennas and to minimize cross talk RF interference when the antennas are operational. Space for antenna separation is 8-ft. 23) Would Government consider in lieu of a square or rectangular platform, a hex (6) sided or Triangular shaped (Delta) platform design with the required 8 foot antenna mounting pipe separation? A: Might be considered, but would have to review any drawings. 24) What is the maximum diameter of the antenna mounting pipes on antenna platform? A: Normally 2-1/2 inch (IPS)(2.875 inch OD). 25) Is the antenna platform to be attached to the top, above the 70 ft of the supplied tower? Confirm that the safety-climbing device can be installed within the perimeter of the self supporting surface face. A: Platform is to be at the top of the tower and requires a vendor that has different overall height plans to meet mission requirements. This means for example some towers are needed that have an overall height of 34-ft, i.e., the basic tower is 30-ft with a nominal height of the top rail on the platform of 4-ft. And, some might require an overall height of say 30-ft, i.e., the basic tower is 26-ft with a nominal height of the top rail being 4-ft making an overall height of 30-ft. 26) What is the maximum allowerd overall height of this structure including the antenna platform? A: 70 feet. 27) Is a drawing available for presentation and clarification purposes? A: No. 28) Would government consider a design where the antenna platform is attached to the vertical leg member if the supplied 70 foot tower with catwalk grating surrounding the exterior of the antenna platform outside of the tower face only? A: Hard to read/understand the question but the answer is NO, if the question is understood. And, remember that a safety climb is required with the towers. 29) Will antennas be installed in same plane and polarity? A: Yes and that is the reason "swing-out antenna mounting arms" are used. 30) What type antennas are being installed-manufacturer, weight, etc? A: Again, same question as twice before. Taco UHF/VHF antennas are being used. D4062A and D4061A1 are being used for the most part. 31) Is there a drawing of the desired final platform construction? A: No, but normally review potential vendor drawings and to mount 6 antennas with proper spacing, the platform size is 6-ft by 8-ft (+/-). 32) Is there a minimum or maximum tower base cross section size? Top cap cross-section size? A: No 33) Is there a wind loading spec for operational and survivability of the antennae? A: Yes, and it is basically the same for most antennas of like ability. That is weight of 13.5 to 19.5 lbs, wind loading of 85 kt with 1/2 inch radial ice and on some antennas, it is 105 kt with 1/2 inch radial ice. 34) Does proposal require installation and construction on site by the tower supplier? A: No. 35) What is the weight and windload of the six antennas at Jedburg site? A: Using 6 ea D4062A UHF Antennas, the combined weight would be 84 lbs (14 lbs ea). These antennas can take 105 kt wind loading with 1/2 inch radial ice. 36) Is the Jedburg site in a highly lightning prone area? A: No 37) What is the size of RF transmission lines used for each antenna? A: Max size will be 7/8 inch Andrews or equal Heliax cable. 38) Is microwave cable ladder to be supplied with these towers? Microwave isn?t being used and normally, microwave uses waveguide. However, the ladder used is normally the same and it can be supplied with the tower however, it normally cost more. If it doesn't come with the towers, then the erection contractor will supply it. What is max number of transmission lines required? There will be 7 each 7/8 inch Andrews Heliax cable run to each tower platform. 39) What would be minimum rung spacing of these towers? A: 12 inch 40) Is transmission line Ice-Bridge to be supplied with towers? Length and width? A: No 41) Who is the contact person for this job? A: Bill Lively, GSA/FTS/7T-5, 819 Taylor Street, Room 14A02, Ft. Worth, TX 76102. Phone 817-978-4086, Fax 817-978-4739, email address bill.lively@gsa.gov 42) Estimated overall cost of the project? A: Range of $50,000.00 to $100,000.00. 43) Is this small business/disabled veteran business set aside? A: This is a total small business set-aside. 44) Actual location of tower site? A: FAA terminology is Jedburg site. Nearest town is Summerville, SC. 45) In order to determine the tower structural design, can the Government please provide at a minimum the State and County where these structures will be erected? A: State of South Carolina, Dorchester County. 46) An exact set of supplied coordinates would be the preferred information. A: Please contact the Contracting Officer for this information. 47) Does the tower structure need to be designed with additional expansion capability for future requirements? A: No. Past performance will be evaluated as follows: Evaluation of past performance shall be based on information provided by the offeror (see below) and any other information the Government may obtain by following up on the information provided by the offeror and/or through other sources (i.e., offeror's performance on previously awarded delivery orders/contracts and/or contracts with other Government entities). The offeror must identify at least one Federal contract or delivery/task order for the federal government, and any other Federal, state, or local government and private contract or delivery/task order, for which the offeror has performed work similar to the statement of work in this solicitation. References should include the most recent contracts completed within the last two years. The offeror shall provide a point of contact, current telephone number and fax number for each contract. This list is due by the date established for receipt of proposals.
- Place of Performance
- Address: Deliver to:, , Joint Surveillance System Site, 100 FAA Drive, Summerville, SC
- Zip Code: 29483
- Country: USA
- Zip Code: 29483
- Record
- SN00234461-W 20030108/030106213506 (fbodaily.com)
- Source
-
FedBizOpps.gov Link to This Notice
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