**[STEEL PLATFORM DESIGN]{.smallcaps}**

**[FOR THE]{.smallcaps}**

**[ASPEN (PKN) LOCALIZER TYPE DIRECTIONAL AID]{.smallcaps}**

1.  **Summary:**

> The purpose of this project is to produce a design for a galvanized
> steel platform that will replace an existing wood framed platform that
> supports a Localizer Type Directional Aid (LDA) located on the top of
> Aspen Mountain (elevation is approximately 11,700 ft).

Design will include the information necessary to fabricate the platform
and construct the foundation that supports the platform.

The A/E Consulting Firm will furnish all labor, materials, supplies,
testing, supporting engineering studies, surveying, legal descriptions,
and other work required to accomplish the design described herein. A/E's
design drawings and specifications will be used by the FAA to acquire a
fabricator/construction construction contractor.

2.  **General Description of Structure:**

-   Platform will support a 14 element, Thales Mark 20A Localizer type
    antenna (to be installed on the platform by the FAA).

-   Top floor of the platform shall be 15' x 108' with a 42" high hand
    rail.

-   Due to the slope of the ground at the antenna site, the height of
    the platform floor will vary, but is expected to be as high as 18
    feet above the ground (existing ground slope can not be disturbed).

-   An antenna counterpoise similar to what is in place at the current
    platform is expected. Specific details of the shape and size of the
    counterpoise will be provided.

-   Structure shall withstand 100 mph wind with ½" radial ice.

3.  **Details:**

    1.  [Site Visit]{.underline}

The A/E Consulting firm shall complete at least one site visit, at their
own expense, prior to submitting their proposal. This visit shall be
coordinated with Bob Brown, FAA Project Engineer (303) 342 1837. This
visit shall serve as a familiarization with the area and to establish
the physical restrictions of the existing site.

2.  [Coordination with the local authorities]{.underline}

The A/E consulting firm shall contact local authorities, including the
Aspen Ski Company, Pitkin County, and the National Forest Service to
determine the necessary approvals and permits necessary to construct the
structure (includes requirements to access the site during
construction).

3.  [Structural Design]{.underline}

The A/E Consulting Firm shall complete all drawings and specifications
required to fabricate the steel platform/counterpoise and the required
support foundations.

4.  [Life Span]{.underline}

The design shall require all steel components to be protected from
corrosion by a system with a minimum life expectancy of 50 years without
maintenance.

5.  [Review of Fabricator/Construction Contractor
    Submittals]{.underline}

The A/E Consulting firm shall review the fabrication submittals received
by the FAA from the FAA's construction contractor to insure that the
information meets the requirements of the A/E's design.

4.  **Deliverables:**

    1.  [Drawings]{.underline}

Submit for approval of the FAA Project Engineer 50%, 90% and 100%
revisions of the drawings. All drawings shall be completed in hard copy
and electronically in AUTOCAD Release 2006 or later format.

2.  [Specifications]{.underline}

Submit for approval of the FAA Project Engineer 50%, 90% and 100%
revisions of the specifications including but not limited to:

Division 2, Site construction,

Division 3, Concrete,

Division 5, Metals,

Division 7, Thermal and Moisture protection,

Division 9, Finishes,

Division 11, Equipment- Climbing devices,

Division 13, Special construction

All specifications shall be completed in Microsoft Word Version 2003
format. An electronic file of these specifications shall be delivered to
the FAA at the end of each phase of this design. The final 100% copy is
intended to be publication ready, including the engineer's stamp for
relevant sections.

3.  [Calculations]{.underline}

Submit for approval of the FAA Project Engineer 60%, 90% and 100%
revisions of the calculations and basis of design. The final version of
these documents shall be signed and stamped by a Licensed Structural
Engineer, empowered to sign drawings and calculations in the State of
Colorado. The A/E Consulting Firm shall secure the services of a local
Geotechnical firm to be responsible for providing the soil
investigations and reports deemed necessary for the proper design and
construction of this project.

Calculations for each phase of this project shall be delivered in a
sequential bounded format.

4.  [Schedule]{.underline}

Design Phase: The A/E Consulting Firm shall complete the design phase of
this project as indicated below. Dates may be adjusted by the Project
Engineer to allow for coordination of participants and weekends and
legal holidays.

> Kick-off meeting and requirements definition 1 day, or as required
>
> Preparation of 50% submittal 45 days
>
> FAA review 14 days
>
> 50% Comments consolidation meeting 1 day, or as required
>
> Preparation of 90% submittal 30 days
>
> FAA review 14 days
>
> 90% Comment consolidation meeting 1 day, or as required
>
> Preparation of 100% Package 15 days
>
> FAA Final review 10 days
>
> Issue Bid-ready construction drawings,
>
> specifications, and calculations 3 days.

5.  [Detailed Cost Estimate]{.underline}

The A/E Consulting Firm shall provide a detailed estimate of the
construction cost, at the 50%, 90%, and 100% design phases. Provide at
the end of each phase electronic versions of all estimates in Microsoft
Excel version 2003 format.

5.  **Codes, Standards and Recommendations**

The A/E Consulting Firm shall list all codes standards and
recommendations applicable for the proposal.

6.  **Qualifications**

The A/E Consultant or its sub-contractor shall have on staff a licensed
Structural Engineer currently empowered to sign drawings and structural
calculations in the State of Colorado. This licensed engineer shall
stamp the contractor's final design submittal, including bid-ready
drawings, specifications, and calculations.

7.  **Point of Contact**

The point of contact for visiting the site is the Bob Brown
(303-342-1837), FAA Project Engineer.