Attachment A- Part 3- Chapter 6_ESR_B20_DAS_REV.pdf

Exterior Renovation of Building W-143 1709051 Naval Station Norfolk, VA

PART 3 - CHAPTER 6 / ESR B20 - Page 1

6. ENGINEERING SYSTEMS REQUIREMENTS

B20 EXTERIOR ENCLOSURE

SYSTEM DESCRIPTION

This system consists of the exterior shell of the facility, which includes all vertical and horizontal exterior closure such as exterior walls, and exterior windows. Structural frame elements at exterior such as columns, beams, and spandrels are included in Superstructure, with only the applied exterior finishes (e.g., paint, stucco) being included here. Finishes to the inside face of walls which are not an integral part of the wall construction will be included in System C30, Interior finishes.

GENERAL SYSTEMS REQUIREMENTS

B2010 EXTERIOR WALLS

Provide concrete spall repairs to existing exterior concrete surfaces.

Provide masonry repairs to existing damaged masonry. Repoint damaged or deteriorated masonry grout to match existing. Replace damaged or deteriorated masonry brick to match existing color and common bond brick layout. Existing painted masonry infill, with colored pigment, on the north elevation of the building is existing to remain.

B201001 EXTERIOR CLOSURE

Not Used.

B201002 EXTERIOR WALL BACKUP CONSTRUCTION

Not Used.

B201003 INSULATION & VAPOR RETARDER

Not Used.

B201004 PARAPETS

B201005 EXTERIOR LOUVERS & SCREENS

Provide exterior louvers and screens, where required, that match the finish of the existing windows and detailed to integrate with the architecture of the building, as appropriate to the design of the building.

B201006 BALCONY WALLS & HANDRAILS

PART 3 - CHAPTER 6 / ESR B20 - Page 2

B201007 EXTERIOR SOFFITS

Not Used.

B201009 EXTERIOR PAINTING AND COATINGS

Provide field applied exterior coatings for all items that are not prefinished, and to prefinished items when required to provide a color other than a standard prefinished color.

Provide elastomeric wall coating system for concrete surfaces. Elastomeric wall coating system color for concrete must match base installation and appearance plan Body 1 - Federal Standard 27780 (light beige) Previously painted red-orange parapet does not match historical photographs and must be repaired and repainted to match Body 1 - Federal Standard 27780 (light beige).

Document location, size, color, and font of existing painted building numbers. After wall repairs, repaint building numbers with elastomeric wall coating in exact location, size, color, and font.

To preserve the historical features of the building, the existing brick masonry must be preserved.

Provide clear exterior waterproofing system for masonry surfaces. For existing previously painted masonry infill, provide elastomeric wall coating to match existing color.

B201010 EXTERIOR JOINT SEALANTS

Provide exterior application of joint sealants to seal joints and prepare for finish material installation. Exterior joint sealant color must match adjacent finish. Provide stainless steel building expansion joint covers.

B201011 SUN CONTROL DEVICES (EXTERIOR)

Not Used.

B201012 SCREEN WALL

Not Used.

B2020 EXTERIOR WINDOWS

Remove and replace existing steel window system complete as indicated on the RFP drawings provided in Part 6 - Attachments. Existing storefront and translucent wall panels to remain.

Remove and replace existing damaged / deteriorated sealant and backer rod complete from existing undamaged window systems to remain. Refer to B201010 EXTERIOR JOINT SEALANTS for additional information.

B202001 WINDOWS

Provide aluminum operable and fixed windows to match existing in office/administration spaces.

Provide integral insect screens for all operable windows.

PART 3 - CHAPTER 6 / ESR B20 - Page 3

B202002 STOREFRONTS

Provide aluminum storefronts to match existing mullion/mutton layout in office/administration spaces. Alternate methods of reglazing and repairs to existing steel windows in the office/administration that are not in poor condition will be considered by the government on a case-by-case basis. For bidding purposes assume all existing steel windows in the office/administration areas will require replacement as indicated in attachment Part 6 - 06_W143_EXTERIOR_REPAIRS_DWG.pdf.

B202003 CURTAIN WALLS

Not Used.

B202004 EXTERIOR GLAZING

Provide insulating glass units, laminated glass, and tempered glass type glazing.

B202090 OTHER EXTERIOR WINDOWS

Provide translucent wall panel system in warehouse spaces and egress stairwells with mullion/muntin layout to match existing window system. Provide operable panels to match existing size, function, and location.

Remove existing abandoned non-operational exhaust vents and/or louvers from existing window systems being removed and replaced. Remove and replace in kind operational exhaust vents and/or louvers with exhaust vents and/or louvers compatible with replacement window system.

Refer to B201005 EXTERIOR LOUVERS & SCREENS for additional information.

B2030 EXTERIOR DOORS

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