EGBA - IFB 2018-0172 - Missionary Tower Replacement (13-32).pdf
PDF 1 MB Posted
- Attached to
- EGBA - IFB 2018-0137 - Twin Tower Replacement
- Solicitation number
- IFB1 EGBA 2018000173 2
- Issued by
- Ouray County, Denver City, Colorado
About this file
This is a design and construction specification document for the Missionary Ridge Tower Replacement project issued by the Estes Park Board of Adjustment (EGBA) in La Plata County, Colorado, approximately 10 miles northeast of Durango. The project requires the design, supply, and erection of a fully functional 160-foot self-supporting communication tower compliant with all applicable laws, codes, and standards. The tower must support existing and future antennas and associated transmission lines without exceeding 80% of its full capacity. Environmental design criteria include a basic wind speed of 110 mph (3-second gust per ASCE 7-16), service wind speed of 60 mph, Exposure Category C, Structure Class III, design ice thickness of 0.25 inches, and a ground elevation factor of 0.70 at 9,851 feet. The specification documents include 14 sheets of detailed drawings (G-01 through AA-01) issued January 4, 2018, with one revision dated January 11, 2018.
The tower must accommodate 26 antenna installations across multiple elevations ranging from 20 feet to 160 feet, including 20-foot fourbay systems, 6-foot and 4-foot Yagi antennas, and various microwave dish installations with specific azimuth orientations and waveguide/coax specifications. Foundation design shall utilize pad and pier construction with a maximum allowable soil pressure of 3,000 PSF, modulus of subgrade reaction of 250 PCI, coefficient of friction of 0.55 for lateral load resistance, and unit weight of 120 PCF for compacted soils. The geotechnical report was noted as pending availability in mid-January at the time of the bid posting, to be provided to the selected vendor upon completion. No specific bid due date, award date, pricing information, or contract term details are provided in the specification document.
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Other files
| File | Type | Posted |
|---|---|---|
| Twin & Missionary - IFB Cancellation.pdf | ||
| EGBA - IFB 2018-0172 - Missionary Tower Replacement (1-12).pdf |
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Geotechnical Report The geotechnical investigation has been completed however the final report is not available at the time of the posting of this RFP. The final Geotech report will be made available to the selected vendor as soon as it is available, likely in the middle of January. For the purposes of your bid please assume the following soil properties:
• A pad and pier foundation design is acceptable for these soils;
• Maximum allowable soil pressure of 3,000 PSF;
• Modulus of subgrade reaction: 250 PCI;
• Coefficient of friction of 0.55 can be used to resist lateral loads;
• A unit weight of 120 PCF can be used for compacted soils.
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