A04_CAHA_SOW_Replace_Lost_Colony_Theater_seating.pdf

Replace Lost Colony Theater Seating at Fort Raleigh Historic Site

CAPE HATTERAS NATIONAL SEASHORE

Outer Banks Group

Statement of Work

Replace Waterside Theater Seating at Fort Raleigh Historic Site

1.0 INTRODUCTION

The National Park Service (NPS) has a requirement to replace the outdoor seating for the waterside theater located at Fort Raleigh National Historic Site, Manteo NC, 27954. The primary use of the theater and seating is for the production of the Lost Colony outdoor drama.

Figure 1: Aerial view of theater Figure 2: Rear view of upper section of theater

Figure 3: Typical foot path between rows Figure 4: Large walkway between upper and lower seating

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Figure 5: View from stage to the theater seating

2.0 BACKGROUND AND EXISTING CONDITIONS:

The waterside theater is located at a National Park Service Unit called Fort Raleigh National Historic Site. The theater consists of terraced seating that can accommodate over 1600 individuals that can view the Lost Colony drama, which lasts approximately 2 hours and occurs between May and August each year. The theater is also occasionally used for other special events including musical performances and special events such as school graduations and concerts during which up to 1600 people occupy the theater. Food and drinks are served in areas adjacent to the theater and patrons, utilizing the seating, bring food and drink into the area while seated. The project site includes the seating area and the earthen walkways between the rows of seats. The access to the project site is through the existing parking lot and paved walkway leading to the seating area. Grounds and landscaping surrounding the pavement are archeologically sensitive and may not be disturbed.

The seats were last replaced was in 1998. Irwin Seating Company of Grand Rapids, Minnesota provided “Patriot model” chairs. There are three sizes of the seats installed per the 1998 seat design. The seat design showed 192 seats at 20” wide, 1,006 seats at 21” wide and 410 seats 22” wide. The seats are bolted on the vertical face of the concrete risers for each row of seats. Seats are anchored into the concrete risers with expansion bolts. The lower section is comprised of 17 rows, and the upper section is comprised of 8 rows.

The current maximum seating capacity is 1,499 seats as of Aug 8, 2021. Due to safety concerns, the existing seat are being removed and disposed of by the park. Mounting bolts have been left in place. In some locations the anchor bolts of the removed seats have been cut and in some locations the anchor bolts extend approximately 4 inches from the concrete face (see photos below). Mounting bolts left in place appear to be in serviceable condition and suitable for reuse.

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Figure 6: Rusted frame Figure 7: Rusted armrest

Figure 8: Rusted seat back

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Figure 9: Mounting hardware, with flanged nuts

Figure 10: Example seat stanchion mounted in concrete riser

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Figure 11: Example of cut bolts Figure 12: Example of seat, row, and seat, armrest marking

3.0 SCOPE OF WORK

The Contractors shall provide approximate 1,600 new theater seats and install in the respective location to maintain the symmetrical layout of the theater by necessary size. Row A seats will not be part of the replacement; light and sound booth on row HH will be protect in place (See Exhibit A for markup).

1. Seats shall meet the Architectural Barriers Act Accessibility Standard (ABAAS) codes and requirements. Proposed seating can be rear mounted directly to concrete, floor mounted, or mounted on or a rail system as long as there is sufficient clearance to maintain access to interior seating.

2. The seat shall contain cupholder and be sufficient to hold the base of typical disposable aluminum, glass, and plastic 12–16-ounce bottles and cans. Cupholders may be installed on the arm rests or on the back of the seats to service the seats behind them.

3. The metal framework for the chairs and other metal components must be corrosion resistant and designed to resist corrosion from the coastal environment.

4. Mounting hardware used to affix seating to the concrete theater shall be corrosion resistant stainless steel or galvanized steel.

5. Seats shall have identifying numbers and letter combination that will be clearly visible on chairs to mark row, seat, and chair arm rest same or similar to seat identification shown in Figure 12. Identification plates must be corrosion resistant from the coastal environment.

6. Contractor shall provide drawings of ABAAS seating and details. Drawings shall show locations of wheelchair seating and raisable arm rests. Permanent seats adjacent to wheelchair spots can be floor or wall mount type. Based on current conditions, the wheelchair row would be established in the breezy way area between the upper and lower seating area.

7. Seats rated to hold minimum of 600 lbs. per seat when mounted to concrete.

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8. Seats shall raise automatically when not in use, and are manufactured with UV resistant, mildew resistant, and corrosion resistant material.

9. After contract awarded, Contractor to schedule a meeting with NPS prior to begin work.

10. Contractor shall field verify measurements of existing theater condition and exact number of seats to be installed

11. Contractor to provide proposed layout of seats showing seat width, spacing between the rows and walking path to NPS for review and approval.

12. Contractor shall provide shop drawings for the proposed seats to NPS for review and approval.

13. Contractor to provide project installation schedule for NPS review.

Demolition:

14. The Government shall remove the existing chairs and dispose of them.

15. Contractor shall reuse existing bolts which work with bolting pattern on the new seats.

All other mounting hardware shall be new 316 Stainless Steel.

16. Cut or remove unusable bolts flush with concrete.

Installation:

17. Ensure all work meets Architectural Barriers Act Accessibility Standard (ABAAS).

Provide signage, Painting, etc... that identifies the ABAAS seating per the design.

18. Provided and install mounting hardware 9/16 316th SS bolts and nuts in locations that are required. The bolts are installed in the concrete.

19. Apply a corrosive resistant painting system on the seats and frames that will prevent deterioration or failure from exposure to a saltwater environment.

20. Provide color selection examples for selection and NPS approval. Seat color to be selected by NPS COR.

21. Contractor shall repair all concrete damaged during chair removal and repair/patch any holes in the concrete where the bolts no longer exist or are no longer being used.

22. Contractor to provided colored seating chart to the National Park Service that shows all seating and details ABAAS seating locations.

Provide draft seating chart before installation for NPS review.

Implement park service comments and provide final seating chart after installation.

23. Provide owner with 5% restock of each type seat installed and provide owner with 5% restock of all seat mounting hardware.