Attach1-Scope_of_Work-B102.pdf

General Project Description

Scope of work includes the repair and renovation of the existing Maintenance Hangar, Building 102 at

Mansfield Lahm Air National Guard Base in Mansfield, Ohio. The existing hangar was constructed in

1950 and renovated in 1997. The facility infrastructure systems including fire protection and alarm, HVAC, electrical, communications etc. are at the end of their useful life and do not meet current codes, ETL’s and UFC’s. Interior functional spaces will be configured for efficient maintenance operations and upgraded to meet Air National Guard (ANG) and base standards. The exterior brick veneer and metal siding will be replaced along with energy efficient, ATFP compliant exterior doors and windows. Building mechanical, plumbing, electrical, telecommunications and fire protection/suppression systems will all be upgraded as well.

Scope of Work

This project consists of the following areas of improvement for the Ohio Air National Guard Hangar 102

Facility as described. The information below represents the envisioned effort for the project.

A. Site Work

1. Construct apron connections off drive aisle to rollup doors providing access to shops.

2. Construct new sidewalks along new drive aisle.

3. Demolish existing pavement and sidewalk at locations of new underground utilities.

4. Remove existing sanitary sewer line and install new including oil water separator. Tie‐in will made to the existing manhole on south side of building.

5. Cost included for new parking gate.

6. Cost included for fence enclosures of mechanical and electrical equipment.

B. Architectural

1. Demo and replace existing brick veneer with color/texture to match new base facilities.

2. Demo existing parachute drying tower.

3. Remove and replace existing metal wall panels with insulated metal wall panels meeting base standards.

4. Replace exterior windows and doors with new insulated, ATFP compliant units meeting base standards.

5. Install new insulated overhead doors.

6. Install new concrete bollards along building exterior to protect equipment and building.

7. Construct new interior partitions and walls complying with Air National Guard Design

Policy.

8. Interior demising walls will be constructed of painted CMU or steel studs with impact resistant gypsum wallboard or plywood wainscot.

9. Provide Ceramic tile walls and floors in toilet, shower, and locker rooms. Toilet and locker room wall tile will be a minimum of 6’ above finished floor.

10. Provide floor finishes throughout the facility as noted on finish schedule.

11. All interior doors to be painted hollow metal with insulated cores.

C. Structural

1. Install footings at new spaces in the hangar.

2. Construct new load bearing CMU wall partitions

3. Perform demolition and replacement of exterior walls, includes installation of new blast‐ resistant windows.

4. New support space within the hangar bay to include new footings, a steel frame or CMU bearing walls, and a concrete‐topped steel floor decks.

5. Strengthening existing roof structure as required to support relocated monorails.

6. Strengthening existing roof structure as required to support new air‐handling equipment.

7. Retrofit existing hangar trusses as necessary to support new fire suppression systems.

D. Mechanical

1. Cost included for all new mechanical equipment as shown on Mechanical Equipment

Schedules and Drawings. See B‐1 Mechanical Design Narrative for additional details.

2. HVAC controls will be incorporated as part of the base wide system. Cost included for

280 control points.

E. Plumbing

1. Provide new plumbing fixtures connected to the existing sanitary drainage system.

2. Sanitary drain piping will be PVC DWV Schedule 40.

3. Sanitary vent piping will be PVC DWV Schedule 40.

4. Provide floor drains as shown on drawings.

5. Domestic water piping will be type L copper.

6. Insulate all domestic cold and hot water piping to prevent condensation and heat loss.

7. Provide compressed air system utilizing existing compressor.

F. Fire Protection

1. Provide a fully automatic wet pipe sprinkler system in building support areas.

2. Provide a fully automatic wet pipe sprinkler system in the hangar bay.

3. Provide a new High Expansion Foam (HEF) system in the hangar bay and associated foam equipment in the fire equipment room.

4. Provide one new horizontal split case centrifugal electric fire pump and soft start controllers and associated piping in a new pre‐fabricated/pre‐engineered pump house.

5. Provide a new combined Fire Alarm and Mass Notification system for the entire facility.

Unit cost included based on total device count.

6. Provide a triple‐IR Det‐tronics fire detection system in the hangar bay.

G. Electrical

1. Provide new pad mounted transformer 480Y/277 volts for use in the hangar facility.

2. Install new secondary service duct bank between the transformer and the switchboard.

3. Provide new 1200 Amp main switchboard in existing electrical room.

4. Provide new digital power meter as part of new 1200 Amp switchboard.

5. Provide new interior electrical distribution to renovated spaces.

6. Provide interior lighting in all renovated spaces.

7. Provide new egress lighting for the facility.

8. Provide new exterior facility lighting.

9. Install new secondary service duct bank between the transformer and the fire pump building.

10. Cost included to remove and reinstall 50 existing light fixtures in the hangar bay.

11. Install conduits and wiring to power new destratification fans installed at hangar truss supports

– see B‐1 Mechanical Design Narrative for additional fan details.

H. Communications

1. Install new communication distribution using the existing communication equipment and cable tray as shown on drawings.

2. Install new wireless access points.

3. Provide connection points for new security cameras. Cameras to be provided by the

Government.

Reference Documents

Repair MX Hangar Mansfield Lahm Air National Guard Base – Type B‐3 Submittal plans and specifications prepared by CH2M HILL‐HDR JV, February 2019.