1671300_Repair Water Infiltration to SE Amin Area_AMENDMENT 1.docx

BUILDING 350 – REPAIR WATER INFILTRATION TO SE ADMIN AREA

NAS Oceana, Dam Neck Annex, Virginia Beach VA

Amendment 0001

04 AUGUST 2022

1) In PART 3 STATEMENT OF WORK B2030 EXTERIOR DOORS: Page 5:

REMOVE the following:

Exterior doors and frames must be non-corroding prefinished galvanized steel. Provide doors meeting thermal performance required by RFP Part 4.

NOTE: Performance Level is determined by frequency of use: By ASTM A250.8 (SDI-100) Performance Level C is 250,000 cycles; Level B is 500,000 cycles, Level A is 1,000,000 cycles.

Model 1 is full flush, model 2 is seamless, model 3 is stile and rail.

Door levels for various locations must be determined in accordance with the following list and sound judgment.

Closet doors (without locks) Level 1 Individual offices, storage rooms, classrooms, patients' rooms, bathrooms, and bedrooms (except BEQ bedrooms) Level 2 BEQ sleeping room entrance doors and interior egress doors Level 3 Exterior Main entrance and circulation doors and other locations Level 4

Doors must be Extra Heavy Duty Doors Level 3, physical performance Level A, Model 1.

Door hardware finish must be stainless steel.

Solid Doors Provide solid steel door assemblies prefinished heavy-duty, non-corroding, insulated doors with frames and hardware. Also provide accessories and wall opening elements such as sills and flashings.

REPLACE with the following: Fiberglass Reinforced Plastic (FRP) Doors

System Description:

Provide door and components including, but not limited to, cores, faces, stiles, rails, heads, jambs, and internal reinforcement, which are FRP structural shapes manufactured by the pultrusion process. Ensure all structural shapes are composed of fiberglass reinforcement and resin in qualities, quantities, properties, arrangements and dimensions as necessary to meet the design requirements in accordance with ASCE 7 and dimensions specified.

Ensure fiberglass reinforcements are a combination of continuous roving, continuous strand mat, and surfacing veil in sufficient quantities as needed by the application and/or physical properties required.

Verify resins are of isophthalic polyester with chemical formulation necessary for corrosion resistance, strength and other physical properties as required.

Finish Surfaces:

Ensure all finished surfaces of FRP items and fabrications are smooth, resin-rich, free of voids and without dry spots, cracks, and un-reinforced areas. Completely cover all glass fibers with resin to protect against their exposure due to wear or weathering. All stiles, rails, heads, jambs, and internal reinforcement are to be integrally pigmented yellow.

Ultraviolet Protection:

Provide documentation that all pultruded structural shapes are further protected from ultraviolet (UV) attack with:

a. Integral UV inhibitors within the resin

b. Synthetic surfacing veil to help produce a resin rich surface

c. UV resistant coating for outdoor exposures.

Flame Spread Rating:

All FRP products to have a flame spread rating of 25 or less as per ASTM E84Tunnel Test.

Structural Properties:

Refer to UFGS 08 22 20 FIBERGLASS REINFORCED PLASTIC (FRP) DOORS.

FRP Door:

Provide and install a seamless press-molded constructed FRP door. Laminate FRP face sheets to be applied while wet and uncured to an internal door stile and rail subframe/core assembly which is pressure molded under heat. Integrally fuse the composite door panel over the entire surface area, do not adhesive-bond at the perimeter stile and rail.

Provide door stiles and rails which are high-modulus pultruded FRP square or rectangular tube subframe. Miter and join tubes internally at the corners with solid polymer blocks to yield a one piece unit. Provide a mid-rail tube across the width of the door at lockset height and additional horizontal rails where specified. Chemically weld all connections. No mechanical fastening at the tube joints is permitted.

Provide a triangular shaped .375 cm 3/8-inch phenolic resin impregnated kraft paper honeycomb cell core for maximum rigidity and compressive strength. Use of polyurethane foam or balsa wood cores are not permitted.

Provide internal reinforcement composed of high-modulus pultruded tubular FRP or high-density polymer compression blocks at all hardware and corner locations. No aluminum, steel, or wood blocking for reinforcement is permitted. A minimum pull-out force strength of 900 pounds per screw is required for all hinge locations.

Door faces are to utilize a chemical resistant thermosetting polyester resin with fiberglass reinforcing layers. Provide structural reinforcement which is knitted multi-layer material with layers of unidirectional fiberglass orientated in both vertical and horizontal directions for high stiffness, impact and warp resistance. Furnish door faces as indicated by the door elevation drawings.

Ensure the exposed finish of the FRP door faces are to be an ultra-violet light stabilized marine grade Neopentyl Glychol (NPG)-isophthalic polyester gelcoat integrally molded to a 25/30 mil wet thickness.

Cutouts for door lights are to be manufactured and not field fabricated. Cutouts are to be totally enclosed by internal pultruded FRP stiles and rails as specified and incorporated into the door subframe with the opening completely fused to both door faces.

Doors shall be insulated to provide an apparent U-factor of 0.48.

Submit manufacturer's descriptive literature for Doors. Include data and details on door construction, panel (internal) reinforcement, insulation and door edge construction.

Hardware Preparation:

Provide hardware reinforcing as specified. Prepare doors for hardware in accordance with the applicable requirements of the FRP door manufacturer. For additional requirements refer to ANSI/BHMA A156.115.

Structural Performance:

Design exterior doors to resist equivalent static design loads in accordance with ASTM F1642. Design doors to withstand the specified design wind load acting normal to the plane of the entrance wall either inward or outward, in accordance with ASCE 7 and ICC IBC.

Water Penetration:

When tested in accordance with ASTM E331, no water penetration is allowed, at a pressure of 0.38 kPa 8 pounds per square foot of fixed area.

Provisions for Thermal Movement:

Design doors to provide for expansion and contraction of the component parts caused by an ambient temperature range of minus 17.8 to 37.8 degrees C 0 to 100 degrees causing buckling, opening of joints, overstressing of fasteners, or other harmful effects.

**End of Amendment 0001**