EGBA - IFB 2018-0172 - Missionary Tower Replacement (13-32).pdf
PDF 1 MB Posted
- Attached to
- EGBA - IFB1 - Missionary Tower Replacement
- Solicitation number
- IFB1 EGBA 2018000172 2
- Issued by
- Ouray County, Denver City, Colorado
About this file
This is a design and construction specification document for the Missionary Tower Replacement project issued by the Elbert Gorman Broadcast Authority (EGBA) in La Plata County, Colorado, approximately 10 miles northeast of Durango. The project requires the design, supply, and erection of a 160-foot self-support communication tower that complies with applicable laws, codes, and standards. The tower must be engineered to support existing and future antennas and associated transmission lines while not exceeding 80% of its full capacity. The structure must accommodate 26 identified antenna and equipment positions, including 20-foot fourbay antennas, omni antennas, Yagi antennas, and microwave dishes mounted at various elevations ranging from 20 to 160 feet. The design must meet specific environmental criteria including a basic wind speed of 110 miles per hour (3-second gust per ASCE 7-16), service wind speed of 60 miles per hour, exposure category C, structure class III, design ice thickness of 0.25 inches, and a ground elevation factor of 0.700 at the site elevation of 9,851 feet.
The project includes detailed geotechnical requirements with preliminary soil parameters provided for bidding purposes, including maximum allowable soil pressure of 3,000 pounds per square foot and a modulus of subgrade reaction of 250 PCI. The final geotechnical report was anticipated to be available in mid-January 2018, with a pad and pier foundation design identified as acceptable for site soils. The document comprises comprehensive engineering drawings and specifications across 14 sheets covering general notes, structural details, foundation details, and antenna configuration layouts. All design work must comply with the specified environmental and structural constraints documented in the tables and drawings provided.
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Other files
| File | Type | Posted |
|---|---|---|
| EGBA - IFB 2018-0172 - Missionary Tower Replacement (1-12).pdf | ||
| Twin & Missionary - IFB Cancellation.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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