Gold Hill Toilet Fabrication_Supplemental specs.docx

GOLD HILL TRAILHEAD

TOILET FABRICATION AND INSTALLATION

NEZ PERCE-CLEARWATER NATIONAL FORESTS

LATAH COUNTY

SPECIFICATION INDEX

DIVISION 1 – GENERAL REQUIREMENTS

01010 – PROJECT LOCATION

A. General: The project work will be located at the Gold Hill Trailhead. Site locations are shown on the drawings.

1. GOLD HILL TRAILHEAD (46.970714°, -116.842575°) – found on the Palouse Ranger District of the Nez Perce – Clearwater National Forests. This area is located approximately 6.25 miles northeast of Potlatch, Idaho Gold Hill Road #770.

01011 – SUMMARY OF WORK

A. General Project work is as follows; Fabricate precast concrete single vault toilet, deliver, and install.

Missoula Concrete Style Aspen/ CXT Style Gunnison

Work Description by Site:

1. Gold Hill Trailhead – Work includes fabrication and installation of precast concrete single vault toilet.

01012 – START WORK

It is estimated that work will begin approximately October 01, 2024, 01013 – CONTRACT TIME

It is anticipated that work will begin on October 01, 2024, and contract time will end June 30, 2026.

01016 – CONTRACTOR’S USE OF THE WORK SITE

Contractor will be allowed to camp at or adjacent to project site. Coordinate with Contracting Officer to locate an approved storage/camping location.

01017 – SCHEDULES

A. Furnish three copies each of the following items after award of contract for review and/or approval pursuant to the contract.

1. Proposed progress schedule showing starting and completion dates of the various phases of work.

2. List of proposed subcontractors must have Contracting Officer’s written approval prior to work on the project.

01050 – COORDINATION

B. General:

1. Contractor shall coordinate with the Contracting Officer to schedule site closures and for any other activities that need to occur prior to completion of the work.

2. Coordination will be required with District personnel prior to delivery to assure the public safety and provide adequate time to close the site 30 days prior to placement.

3. Coordination will be required with Contractor in charge of decommission of existing toilet and excavation and installation of new unit to ensure timing is coordinated for installation of the new unit.

01550 – ACCESS ROADS AND PARKING AREAS

A. Access

1. Contractor shall be responsible for maintaining and restoring access ways to and at the work site. If damage occurs to the existing roadways, as a result of the Contractor’s actions, the Contractor shall restore the roadways to the condition prior to the start of work.

B. Parking

1. Parking is available at the construction site at designated areas approved by the Contracting Officer.

01551 – STORAGE OF MATERIALS

The Contractor will be allowed to store materials at the project site under construction. Coordinate the location of the storage area with the Contracting Officer. Materials subject to damage from the weather shall be adequately protected by the Contractor. The Contractor will be solely responsible for the loss of or damage to materials stored at the job site.

01700 – PROJECT CLOSEOUT

A. Cleaning

1. In addition to keeping trash around the work areas picked up daily, Contractor shall pick up and remove all trash from in and around the work areas before final acceptance.

B. Painting

1. All areas that have been painted must be cleaned if any spillage occurs.

01800 – MEASUREMENT AND PAYMENT

A. Description

1. Measurement and payment for contract work will be made only for and under those pay items included in the Schedule of Items. All other work and materials will be considered incidental to and included in the payment of the pay items in the Schedule of Items.

2. Method of Measurement – The following methods of measurement are used to determine contract quantities for payment.

3. Structures will be measured according to neat lines shown on the Drawings or as altered by the Contracting Officer (CO) in writing to fit field conditions.

B. Units of Measurement

1. Payment will be units defined and determined according to US Standard Measure and by the following:

a. Each - One complete unit which may consist of one or more parts.

b. Payment - One of the following methods of measurement for determining final payment is designated on the Schedule of Items for each pay item.

c. Actual Quantities (AQ) – These quantities are determined from measurements of completed work.

d. Lump Sum Quantities (LSQ) – These quantities denote one complete unit of work as required by or described in the contract, including, necessary materials, equipment, and labor to complete the job. They will not be measured.

DIVISION 2 – SITE WORK

02000 – MOBILIZATION

A. General

1. Description – This work shall consist of preparatory work and operations for the movement of personnel, equipment, and incidentals to the project sites, and all other work and operations that must be performed or that cause costs to be incurred prior to beginning work on the various items at the project sites.

B. Products – Not used.

C. Execution – Not used.

D. Measurement and Payment

1. Method - The method of measurement, as described in Section 01800, will be designated in the Schedule of Items.

2. Basis - Mobilization will be paid for at the contract unit price for the item as shown in the Schedule of Items.

3. Progress payment will be made as follows:

a. When 5 percent of the original contract amount is earned from other pay items, 50 percent of the amount for mobilization, or 5 percent of the original contract amount, whichever is less, will be paid.

b. When 10 percent or more of the original contract amount is earned from other pay items, 100 percent of the amount for mobilization, or 10 percent of the original contract amount, whichever is less, will be paid.

c. Upon completion of all work on the project, any unpaid amount for mobilization will be paid.

d. The total of all payments, including bonding, shall not exceed the original contract amount for this item.

Payment will be made under:

DIVISION 13 – SPECIALTIES

13120 – PRE-CAST VAULT TOILET

A. General:

1. Description: The work of this section consists of prefabrication,on-site delivery, off loading and placement of single-unit pre-cast concrete vault toilet at a prepared site. This section includes specifications for the construction of precast concrete vault toilet buildings.

2. The quality and style of the toilet buildings shall be equal to the Gunnison manufactured by CXT, Inc. or the Aspen manufactured by Missoula Concrete Construction.

Telephone 1-800-696-576

Missoula Concrete Style Aspen/ CXT Style Gunnison

2. Design Requirements

a. Vault Toilet Design

1) The units shall conform to the design criteria for vault toilets as described by the USDA Forest Service in their publication, "In Depth Design and Maintenance Manual for Vault Toilets" (July 1991 -Publication No. 9123 1601), by the San Dimas Technology and Development Center, 444 East Bonita Avenue, San Dimas, California 91773. Contractors may request a hard copy version of the publication by calling (909) 599-1267 Ext. 201. Include publication name, publication number, mailing address and contact phone number.

b. Structural Live Loads-Buildings shall be designed to meet the following load requirements in accordance with the International Building Code (IBC).

1) Snow Load - 250 psf

2) Wind Load- 120 mph (fastest mile) or 140 mph (3-second gust), Exposure C

3) Earthquake-Maximum considered ground motion shall be 175 (0.2 second spectral response acceleration) and 125 (1.0 second spectral response acceleration), Site Class D. Design requirements associated with Uniform Building Code (UBC) Zone 4 are acceptable.

4) Floor- 50 psf

c. Other Loads

1) Vault(s) shall be designed to support the building, screen area and structural loadings evenly.

2) Contractor is responsible for adding reinforcement as needed to facilitate handling, assembling building components and transporting without incurring structural damage or cracking of the building components.

d. Accessibility

1) Prefabricated vault toilet buildings shall conform to the requirements of the "Uniform Federal Accessibility Standards" (UFAS) and the "Americans with Disabilities Act Accessibility Guidelines" (ADAAG).

2) Buildings shall have full 60-inch turning diameter in each interior and entry area.

e. Standard Design Options:

1) Roof Textures - Simulated wood shake.

2) Wall Exterior Textures - Simulated barn wood

3) Screen Options - Full screen

4) Door Orientation - Right-hand entry

5) Signs-Unisex and Accessible Symbols .

6) Vault access cover - Locking cover with watertight gasket seal.

7) Vault Liner - Tamoseal or approved equal

f. Tolerances

1) Precast concrete panels shall be cast within ¼" of dimensions shown on shop drawings.

g. Design, production, or methods cannot be changed during the contract period without prior approval of the Contracting Officer.

3. Quality Assurance

a. Reference Standards

1) ASTM C33 -Concrete Aggregates

2) ASTM C39 -Method of Test for Compressive Strength of Cylindrical Concrete Specimens

3) ASTM C143 -Method of Test for Slump of Concrete

4) ASTM C150- Standard Specification for Portland Cement

5) ASTM C192-Method of Making and Curing Test Specimens in the Laboratory

6) ASTM C 595 Standard Specification for Blended Hydraulic Cements

7) ASTM C 618 Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete

8) ASTM 121 I.I - Recommended Practice for Selecting Proportions for Normal and Heavyweight Concrete.

9) PCI MNL 116 - Quality Control for Plants and Production of Precast Prestressed Concrete Products

10) AISC - Specification for the Design, Fabrication and Erection of Structural Steel Buildings

11) AWS D1.1 - Structural Welding Code

b. Minimum Contractor Requirements

1) Precast concrete manufacturing plant shall be Precast/Prestressed Concrete Institute (PCI) certified.

2) Welders shall be currently qualified according to AWS DI.I.

c. Testing

1) The Contractor shall be responsible for all sampling and concrete testing.

2) Sampling and testing shall be conducted by an independent testing laboratory, unless otherwise approved by the Contracting Officer.

3) All testing shall be performed by qualified individuals who have been certified ACI Technician Grade 1.

4) Sampling shall be in accordance with ASTM Cl 72.

5) The following test shall be performed for first batch poured each day.

i. Slump, ASTM C143

ii. Air content, ASTM C231

iii. Compressive strength, ASTM C39

· 1 cylinder at 7 days

· 1 cylinder at 28 days

iv. Contractor shall provide copies of test results to the Contracting Officer upon request.

d. Water Tightness Test

1) Contractor shall certify that the vault liner was tested at the plant and is watertight.

2) The vault must be filled with potable water and allowed to sit for 48 hours. If leakage is observed or measured the vault liner shall be repaired or replaced and retested.

3) At Contractor option the vault liner may be tested at the site after placement of the vault but prior to backfilling.

4) The Ordering Unit Contracting Officer may require the Contractor to conduct additional tests at the site if the water tightness of the vault is in question.

5) All costs to conduct onsite water tightness tests, or to repair or replace a leaking vault will be the responsibility of the Contractor.

4. Submittals

a. Technical Proposal

1) Shop Drawings

i. Submit shop drawings for each proposed model. Indicate standard options and any additional cost options.

ii. Drawings must show the exact model floor plan, and the size and location of all vents, screens, doors, windows, etc.

2) Specifications and Installation Manual

i. Provide one copy of the specifications and installation manual for each proposed model.

3) Provide Manufacturer's Literature for the following:

i. Door, louvered door vent and door hardware

ii. Toilet riser, toilet seat and lid, grab bars, and toilet paper holder

iii. Paint - interior

iv. Caulk, grout, and adhesive

v. Concrete form liners

vi. Concrete color additive and stain including color chips, curing compound and sealer

vii. Vault vent pipe

viii. Gasket for vault cleanout lid

ix. Vault liner

x. Signs

xi. Coat Hooks

xii. Windows

xiii. Vents

xiv. Waste Receptacles

4) Concrete

i. Submit aggregate test results, concrete mix design including all concrete additives, and name of concrete supplier and aggregate source. All tests must have been completed within 24 months of the submittal of the technical proposal.

b. Post-Award

1) Design calculations and final drawings shall be stamped by a professional engineer and submitted to the Contracting Officer prior to construction of the first building for each accepted model. The professional engineer must be registered in the United States.

2) Concrete Mix Requirements

i. Provide 28-day compressive strength test results within 35 days following manufacturing of the first building for each accepted model.

ii. If concrete supplier, aggregate source, or any additives change at any time, submit new concrete information to the Contracting Officer for approval.

3) Colored and Textured Concrete

i. Submit one colored concrete sample for each color and texture of exterior building surface, accompanied by manufacturer's literature for color additive and form liner, to the Contracting Officer for approval at least 30 days prior to the first anticipated colored concrete placement.

ii. Minimum sample size shall be 12" x 12" x 1".

iii. The Contracting Officer may waive sample requirement if Contractor can show evidence of successful work with same color additive and aggregates as proposed for this project. Evidence must be a completed installation accessible to the Contracting Officer or designated representative at least 30 days before first placement of colored concrete is anticipated.

c. Basis of design is the "Aspen/Gunnison" single riser vault toilet from Missoula Concrete/CXT. Submittals for the style of the single vault toilet as provided by the manufacturer are required.

5. Delivery and Handling

a. Offloading and Assembly

2) The Contractor is responsible for unloading and assembling all components of the precast concrete vault toilet.

3) The Contractor shall notify the Ordering Unit Contracting Officer 10 days prior to the anticipated delivery date and 2 days (48 hours) prior to the exact date of delivery.

4) Deliveries shall only be made between the hours of 8:00 a.m. and 4:30 p.m. (local time), Monday through Friday, unless otherwise approved by the Ordering Unit Contracting Officer.

6. Closeout Submittals

a. Operation and Maintenance Manual

1) Provide three copies of the operation and maintenance manual to the Ordering Unit Contracting Officer at the time of delivery.

2) Operation and Maintenance Manual should include, but not limited to, start-up procedures; recommended types of cleaners and cleaning tools that should be used; instructions on when and how to pump the vault; plus any additional information needed to ensure a properly functioning and odor free toilet.

7. Warranty

a. Special Warranty on Building and Accessories: Written warranty, signed by Contractor agreeing to repair or replace building and/or accessories that fail or are damaged within the specified warranty period as a result of normal use and/or typical weather conditions. Items in this item include precast concrete building in its entirety, and all caulking, sealant, grout, adhesive, mortar, primer, paint, penetrating stain, concrete sealer, windows, wall vents, vault toilet risers, grab bars, toilet paper dispensers, doors, locksets, deadbolts, door louvers, door sweep, door stops, coat hooks, vault cleanout covers, signs, and vault vent pipes.

1) Warranty Period: 3 years from date of Acceptance

b. Special Warranty on Water Tightness of Vault Liner: Written warranty, signed by Contractor agreeing to repair or replace vault liners or entire vaults that fail to remain watertight within the specified warranty period.

1) Warranty Period: 7 years from date of Acceptance B. Products:

1. Precast Concrete Formwork

a. Forms shall be constructed of plywood, lumber, or steel sheets or plates free of defects, which could cause blemishes. Forms must be removable without injuring the concrete and must be constructed to maintain tolerances between mating surfaces of buildings components.

b. Form liners shall be used to provide the desired exterior appearance.

1) Form liners for all exterior surfaces shall be approved by the Contracting Officer prior to use.

2) Texture shall be submitted and approved by the Contracting Officer.

c. Form coating shall be non-staining type that will not leave residual matter on surface of concrete or adversely affect proper bonding of subsequent coatings, caulking, grout, or adhesive applied to concrete surfaces.

1) Use form release agent or coating as recommended by manufacturer of the form liner.

2) Coatings containing mineral oils or other nondrying ingredients are not permitted.

2. Concrete Reinforcement

a. Reinforcing steel shall meet the requirements of ASTM A615, grade 60.

b. Welded wire fabric shall meet the requirements of ASTM A185.

c. Pre-stress strand, if Contactor elects to use it to facilitate manufacturing, shall meet the requirements of ASTM A416, Grade 270.

d. All reinforcement shall be new, free from dirt, oil, paint, grease, loose mill scale, and loose or thick rust when placed.

3. Concrete Mix Requirements

a. Concrete shall be supplied by a ready-mix or precast concrete products firm regularly engaged in the business.

b. Cement, aggregate, and water shall be proportioned to obtain concrete with good workability.

c. Do not use materials containing frost or lumps of frozen materials.

d. Concrete shall meet the following requirements:

1) Aggregate size shall be Course No. 67 or fine aggregate (see Table 2, ASTM C33, or Table 1, ASTM C33) as approved by Contracting Officer.

2) Minimum cement content: 6.5 sacks per cubic yard.

3) Cement type: ASTM C150 Type II, IIA, III, V (sulfate resistant) or ASTM C- 595 Type IP (sulfate resistant) for building and vault.

4) Maximum water-cement ratio: 0.45.

5) Slump: 3 to 5 inches by ASTM C143.

6) Air content: 4.0 to 7.0 percent by ASTM C231.

7) Minimum concrete strength: 4,500 psi at 28 days.

8) Water shall be potable.

9) Admixtures:

i. Air-entrainment, ASTM C260.

ii. Water reducing agent, ASTM C494, Type A.

iii. Use of other admixtures is subject to approval by the Contracting Officer.

e. The Contractor shall furnish, with each truckload or batch, a certificate showing:

1) Amount (by weight) - Cement in each load

2) Amount (by weight)-Fine aggregate in each load

3) Amount (by weight)- Coarse aggregate in each load

4) Amount (by weight)- Water in each load

5) Amount (by weight)- Color additive

6) Time of day cement was added to the aggregate and water.

7) Certificates shall be available for each building produced and provided to the Contracting Officer upon request.

4. Colored Concrete

a. The following components shall be precast with integrally colored concrete:

1) Toilet building roof panels

2) Toilet building wall and screen panels

b. Color additive shall conform to ASTM C979.

1) The same brand and type of color additive shall be used throughout the manufacturing process.

2) All ingredients shall be weighed and be mixed adequately to ensure uniform dispersion of the color.

3) Color additive shall be the color specified on the delivery order.

4) Color additive shall be as provided by Davis Colors 800-356-4848, or approved equal. Recommended colors include:

i. "Mocha” - Davis Color No. 6058.

5. Concrete Panel Thickness

b. Minimum thickness of concrete panels shall be as indicated.

1) Vault wall - 4"

2) Floor and porch slabs - 5" if reinforcement steel is prestressed or post tensioned or 6" without prestressed or post tensioning reinforcement.

3) Roof slab - 5"

4) Vertical walls and screens - 4" for uniform panels or as shown below for tapered panels.

6. Concrete Curing Compound

a. Curing compound shall be colorless, complying with ASTM C-309, type I or I-D.

7. Structural Steel

a. Steel angles and plate connectors, ASTM A36

b. Filler metals for welding: ASTM A233, E70: XX Series welding electrodes.

8. Caulking, Sealant, Grout, Adhesive, And Mortar

a. Caulking and sealant shall remain flexible and non-sag at temperatures from - 50° to +140° Fahrenheit.

1) Exterior joints at roof ridge, roof/wall connection, and wall panel joints: 100% silicone caulk, clear or colored to match concrete, GE Silicone II, 800-626-2000, or approved equal.

2) Interior joints: Paintable Latex Caulk, GE Speedpaint 35-Year Siliconized Acrylic Latex caulk, 800-626-2000, or approved equal.

b. Grout shall be non-shrink type and shall match color of surrounding concrete as nearly as possible.

c. Epoxy concrete adhesive shall be two component, rigid, non-sag gel adhesive for bonding to dry or damp surfaces, moisture insensitive. Color to match surrounding concrete as nearly as possible.

d. Portland cement mortar shall consist of one part Portland cement, three parts sand, and enough water to make a workable mixture. Bonding agent may be added to mixture in lieu of separate application of adhesive to panel.

9. Concrete Paint and Pigmented Sealer

a. Paint, pigmented sealer, and accessory materials shall conform to Federal Specifications or be similar "top-of-the-line" products of the manufacturers listed below. The Government reserves the right to reject "top-of-the-line" products, which in its opinion are not comparable to the Federal Specification requirements.

1) Products used shall not contain more than 0.06 percent (six hundredths of one percent) by weight of lead.

b. Exterior concrete surfaces

1) Walls and roof

i. Water-based, acrylic, penetrating pigmented sealer with water repellent properties, same color as the walls or roof, followed by a clear acrylic anti graffiti sealer.

· Canyon Tone Stain "W" as manufactured by United Coatings, 800- 541-4383, or approved equal.

2) Concrete porch slab

i. Clear acrylic sealer.

c. Interior concrete surfaces

1) Walls and ceiling

i. One or two-part water-based epoxy paint as manufactured by Sherwin Williams Company, 800-321-8194, or approved equal.

· Primer/block filler as recommended by paint manufacturer and as approved.

ii. Water based, acrylic, penetrating pigmented sealer with water repellent properties, color white, followed by a clear acrylic sealer.

· Canyon Tone Stain "W" as manufactured by United Coatings, 800- 541-4383, or approved equal.

2) Concrete floor slab

i. One or two-part, water-based epoxy paint with a silica sand suspension to provide a non-slip uniform texture, as manufactured by Sherwin-Williams Company, 800-321-8194, or approved equal.

· Primer/block filler as recommended by paint manufacturer and as approved.

d. Metal surfaces

1) Metalastic DTM acrylic modified enamel paint, semi-gloss, as manufactured by Sherwin-Williams Company, 800-321-8194, or approved equal.

2) Primer as recommended by paint manufacturer and as approved.

e. Paint colors shall be as follows:

1) Concrete walls and ceiling, inside building: White.

2) Concrete floor and cove, inside building: Gray.

3) Metal window and doorframes, louvered vents, and doors, interior and exterior: Dark Brown.

4) Metal vault access lids and frames, exterior: Dark Brown.

5) Metal bar-type toilet paper dispenser (unless stainless steel): White.

f. Items under this section shall be included in the extended warranty for the building as described in Part 1.

10. Concrete Exterior Surface Sealer

a. Weatherproofing sealer

1) Clear, water based penetrating sealer with water repellent and graffiti resistant properties.

ii. Acrysheen as manufactured by United Coatings, 800-541-4383, or approved equal.

11. Windows

a. The window area for each room in the toilet building (except the chase) shall provide natural lighting and shall be at least 10 percent of the floor area.

b. Window glazing shall be ¼ inch thick pebble finish (or clear sandblasted on both sides) colorless LEXAN polycarbonate. Window frame and glazing shall be removable from the interior.

13. Vault Toilet Riser

a. Toilet riser shall be constructed of seamless cross-linked polyethylene, complete with molded plastic heavy-duty open-front seat and cover assembly, designed to fit hole in floor slab. Color: White or off-White. Top of toilet seat must be 18" above the floor, ± ½". Heavy duty seat and cover assembly as manufactured by Romtec, Inc., 18240, N. Bank Road, Roseburg, Ore. 97470, 541-496-3541, or approved equal.

14. Grab Bars

a. Stainless steel tubing, 1-1/2 inch outside diameter mounted 1-1/2 inches from wall, 18-gauge, type 304 Stainless steel concealed screw-mounting flanges, Bobrick series B- 6806, 888-610-8889, or approved equal.

15. Toilet Paper Dispenser

a. Bar-type toilet paper dispenser shall be constructed of stainless steel with satin finish or steel with glossy white enamel finish with neoprene sleeve, designed to hold three standard rolls of toilet paper. Holder shall not prevent the free turning of the paper rolls. The dispenser shall be manufactured by Romtec Inc., 18240 N. Bank Road, Roseburg, Oregon 97470, 541-496-3541 or approved equal.

16. Steel Doors

a. Doors

1) Flush panel type, 1-3/4-inch thick, minimum 16 gauge prime-coated steel reinforced-core door, with minimum 20-gauge internal stiffeners and fiberglass insulation, 747 Series, as manufactured by Curries Company, 800-377-3948, or approved equal.

b. Door Frames

1) Door frames shall be knock-down or welded type, single rabbet, minimum 16 gauge galvanized prime-coated steel. Width to suit wall thickness, as manufactured by Curries Company, 800-377-3948, or approved equal.

2) Provide three rubber door silencers on latch side of frame.

c. Door Frame Anchors

1) Provide three anchors per jamb located approximately at same level as hinge locations.

2) Use anchor type suitable for fastening to precast concrete and designed for future removal of frame.

3) Anchors may be omitted if frame is cast in panel.

d. Door Hinges

1) Door hinges shall be 3 per door, 4-1/2" x 4-1/2", U.S. 26D finish (dull chrome) with adjustable tension (adjusted to a 5 lb maximum pull) and automatic closing as manufactured by the Stanley Company, 800-337-4393, or approved equal.

e. Lockset

1) ANSI Al 56.2 Series 4000, Grade 1 cylindrical lockset for exterior door.

2) Lever handle inside and outside.

3) Either handle operates latch unless outside handle is locked by push-button inside.

4) Push-button automatically releases when inside lever handle is turned or door is closed.

5) Emergency slot on exterior so door can be unlocked from outside with a coin, screwdriver, etc.

6) Inside lever handle always active.

7) U.S. 26D finish (dull chrome).

8) Model No. 5402LN as manufactured by Yale Security Group, 800-438-1951, or approved equal.

f. Deadbolt

1) Mortised type, operated by key from outside only, which will receive a No. 1152, 1-1/8", 5-pin cylinder as manufactured by Yale Security Group, 800-438- 1951, or approved equal.

2) If provided by the Forest Service, install Government-provided cylinder.

1) Door Louver - Louver shall be fixed, inverted split Y, non-vision, and 18 gauge-galvanized steel with factory prime coat, FDLS series, as manufactured by Anemostat Door Products, 310-835-7500, or approved equal.

2) Door louvers will not be acceptable on any models with exterior screen walls or models with other types of obstructions that will prevent proper venting of the toilet facility.

3) Vent shall have an exterior insect screen on or attached to the louver.

g. Door sweep shall be provided at bottom of door and shall be an adjustable brush type.

i. Door Stop

1) Door stop shall have a cast metal base, U.S. 26D finish, with convex gray rubber 2 3/8" diameter bumper with a l" projection, suitable for installation on concrete.

17. Double Coat Hook

a. Stainless steel formed construction with a satin finish and nail in anchor. Upper hook shall extend at least 2/1/2 inches from wall. Lower hook shall extend at least 1 ¼ inches from wall. Mounting height above floor to centerline of coat hook shall be a maximum of 48 inches. Both hooks shall be curved or angled to hold items securely.

18. Vault Cleanout Cover

a. Plate for vault cleanout cover lid shall be ¼ inch thick diamond plate steel. Cleanout coverlid shall be hinged and configured so that it can be locked with a padlock and held in the open position when cleaning the vault. The vault cleanout shall have a steel angle frame cast into the concrete and the entire assembly slightly raised to allow water to drain away from the opening. The hatch and frame shall be primed and painted on the interior and exterior.

b. A neoprene sheet (full width x length) shall be adhered to the entire bottom surface of cover lid to provide an airtight seal.

c. Provide gasket between frame and cover for watertight seal.

19. Signs (Symbols)

a. With each order, the Contractor shall be notified as to the number of toilet signs UNISEX. The required signs shall be mounted on the exterior wall of the toilet building adjacent to the latch side of the door.

b. Handicapped accessibility signs, unisex signs, shall be ADA compliant and shall conform to the following:

1) Signs shall be fabricated out of fiberglass and shall be suitable for exterior mounting.

2) International symbols and text shall be raised 1/32 of an inch. Lettering shall be typestyle Standard Medium and a minimum of 5/8" high.

3) Grade 2 Braille shall be shown below text.

4) All signs shall be white text and symbols on brown background.

5) Signs shall be BEST Standard Word & Picture signs as manufactured by BEST Sign Systems, 800-235-2378, or approved equal.

b. An interior sign reading "PLEASE DO NOT PUT TRASH IN TOILETS. IT IS EXTREMELY DIFFICULT TO REMOVE - Thank you" shall be installed above each toilet riser.

20. Sign Hardware

a. Sign fastening hardware shall be tamper-proof stainless steel or galvanized steel.

21. Vault Vent Pipe

a. Vault vent pipe shall be seamless polyethylene (PE) plastic pipe, 12" nominal size, 12.75" outside diameter, minimum 0.392" wall thickness, 32.5 standard dimensional ratio (SDR), PE 3408 high density, black color, UV stabilized, Driscopipe 1000 as manufactured by CP Chem Performance Pipe, 800-527-0662, or approved equal.

b. Cap each vault vent pipe exhaust opening with a raptor screen

22. Vault Liner

a. One-piece, seamless liner, suitable for wastewater applications.

1) Acrylonitrile/butadiene/styrene copolymers (ABS), 752 virgin plastic, initial sheet thickness 0.375", and final stamped thickness a minimum 0.25".

2) Low Density Polyethylene (LDPE), minimum uniform thickness of 0.25".

3) Other materials for vault liners may be submitted to the Contracting Officer for approval.

4) Liners shall be attached to the concrete walls and the bottom of the vault. Penetration through the liner to attach to the concrete walls will not be permitted.

5) Vault liners shall be provided with an extended warranty as described in Part 1.

C. Execution:

1. Concrete Formwork

a. Support and brace forms sufficiently to prevent distortion of forms due to pressure of the concrete during concrete placement, vibrating of concrete, and curing.

b. Vertical grooves in form liner pattern shall be continuous except for openings for doors, windows, and vents.

1) Horizontal butt joints between form liner panels will not be allowed.

2) Vertical butt joints between form liner panels shall be made at vertical groove in liner pattern except at outside comers.

3) Vertical grooves in form liner pattern shall be arranged so that there is equal space between vertical window or doorframe edges and the adjacent vertical grooves at each opening.

c. Form ties will not be allowed.

d. Remove all snow, ice, dirt, sawdust, shavings, or other debris within the forms before placing concrete.

2. Removal of Forms

a. Contractor shall assume all responsibility for determining when to remove the concrete components from the forms without causing structural damage to the components. Buildings constructed with damaged components will be rejected.

3. Reuse And Coating of Forms and Form Liners

a. Thoroughly clean forms and form liners before each use.

b. Apply form coating and form release agent on all forms and form liners in accordance with the manufacturer's recommendations.

4. Concrete Reinforcement

a. Detail reinforcement in accordance with ACI 318.

b. Steel reinforcement shall be centered in the cross-section area of the walls and shall have at least one inch of concrete cover on the under surface of roof and floor. Provide diagonal reinforcement at openings.

c. Accurately place and adequately support steel reinforcing or strand in final position prior to starting placement of concrete. The maximum allowable variation for center to-center spacing of reinforcing steel is ½ inch.

d. Use full lengths of reinforcing steel whenever possible and keep the number of splices to a minimum. When splices are necessary on long runs, splices shall be alternated from opposite sides of the component for adjacent steel bars. Lap bars No. 4 or smaller, a minimum of 12 inches. Lap bars larger than No. 4, a minimum of 24 bar diameters.

e. Bend bars cold unless otherwise approved by the Contracting Officer. No bars partially embedded in concrete shall be field bent except as approved by the Contracting Officer.

5. Cold Weather Concrete

a. Cold weather concrete placement shall be in accordance with ACI 306.

b. Do not place concrete if ambient temperature is expected to be below 35°F during the curing period unless heating is provided to maintain the concrete surface temperature of at least 45°F.

6. Hot Weather Concrete

a. The temperature of the concrete shall not exceed 80°F at time of placement, and when the ambient temperature reaches 90°F, the concrete shall be protected with moist covering or other methods approved by the Contracting Officer.

7. Mixing And Delivery of Ready-Mix Concrete

a. Mixing and delivery shall be accomplished in accordance with ASTM C94, sections 9, 10, and 11 as appropriate for manufacturer.

b. Aggregate and water will be adjusted to compensate for differences in the saturated surface-dry condition.

8. Placing And Consolidating Concrete

a. The Contracting Officer must be given the opportunity to inspect forms after placement of reinforcing steel in forms and before placement of concrete, when requested.

b. Concrete shall be discharged as soon as possible after mixing and time shall not exceed 30 minutes.

c. Avoid segregation. Place in layers not more than 24 inches deep. Do not move concrete with vibrators or tampers.

d. Consolidate concrete with suitable mechanical vibrators operating within the concrete or attached to steel forms. Vibrate at any point sufficiently to accomplish compaction, but do not prolong to a point where segregation occurs.

e. Floor of building shall be one-piece to prevent separation of panels as a result of freeze/thaw.

f. Vault

1) Concrete shall be placed around the inverted liner forming one integral piece.

9. Finishing Concrete

a. Interior Floor and Exterior Slab: Strike flush to within 1/8-inch variation in 6 feet. Float and trowel slabs smooth until no marks remain. Apply a final light broom finish to exterior slabs only.

b. Interior Wall Surfaces, Interior Screen Wall Surfaces, and Ceiling:

1) Finish shall be that provided by smooth steel form, or smooth trowel finish with no trowel marks.

2) All lifting points on screens shall be on panel edge. Plug with bolts or caulking after erection.

c. Exterior Textured Surfaces:

1) Building Walls and Exterior Screen Walls

i. Finish shall be as indicated on the delivery order using an approved form liner.

2) Roof Panels

i. All exterior surfaces of the roof panels shall be as indicated on the delivery order using an approved form liner. The underside of the overhang shall have a smooth finish.

d. Cracks and Patching:

1) Cracks in concrete components caused by contractor fabrication, shrinkage during curing, handling, shipping, and installation shall be cause for rejection if the Government determines that the crack affects the serviceability or structural integrity of the component.

2) Fill small holes, depressions, and air or rock pockets in all surfaces with non shrink Portland cement based patching material while concrete is still green and within one day of form removal. Patch shall match the color, finish, and texture of surrounding surface.

3) Patching will not be allowed on any component with holes, ships, or exposed reinforcement totaling more than 18 cubic inches or with any defects more than 2 inches deep. Those components will be rejected and must be replaced at Contractor's expense.

10. Curing And Hardening Concrete

a. Keep all concrete surfaces wet for at least six days after being placed. Acceptable methods include ponding, wet burlap, curing paper, plastic sheets, and membrane curing compound. Other methods are subject to the approval of the Contracting Officer.

11. Colored Concrete

a. The following concrete components shall be integrally colored.

1) Toilet building roof.

2) Toilet building exterior walls.

3) Toilet entrance screen.

b. The same type and brand of cement, coloring agent, aggregates, and other additives shall be used throughout. In addition, as far as is reasonably practicable, all ingredients shall be from the same lot or manufacturing process. Aggregates shall be from the same source.

c. All volumes of concrete shall be uniform in all respects to ensure consistency of the color of the finished concrete. All ingredients shall be weighed. Add color by weight as recommended by the manufacturer of the concrete color. The mixing operation shall be adequate to uniformly disperse the color throughout each batch.

d. Wash and thoroughly clean the mixer and transporting equipment before mixing colored concrete. Repeat each time a change is made to a different color to avoid any carry-over.

12. Structural Joints

a. Joining details other than those described below will not be allowed unless approved by the Contracting Officer prior to manufacture of the buildings.

b. Wall components shall be joined together with epoxy concrete adhesive and two welded plate pairs at each joint. Each weld plate shall be a minimum of 6 inches long and located one pair in the top quarter and one pair in the bottom quarter of the seam. Weld plates shall be anchored into concrete panels and welded together with a continuous weld. Welds shall be thoroughly cleaned prior to application of caulk or paint. Adhesive shall be applied for the entire length of the seam. Seal interior seams with paintable caulk. Seal exterior joints with caulk to match building color or clear. Linseed oil shall be applied under silicone sealant on brown integrally colored components only, where such treatment is necessary to prevent brown color from appearing pinkish.

c. Walls and roof shall be joined with weld plates, minimum 2 ½" x 5" at each building comer. Where the Contracting Officer determines that the joint between wall panels and the joint between walls and roof shall be gas-tight, seal with silicone caulk.

d. Where the joint between the walls and roof is not true enough to prevent point loading, the joint shall be grouted with approved rigid non-shrink grout that distributes the weight of the roof evenly around the perimeter of the building walls.

e. The joint between the floor slab and walls shall be joined together with epoxy concrete adhesive and two weld plates pair for each wall component, one near each end of each wall panel, or each comer on each side, whichever is greater. Each weld plate shall be a minimum of 6 inches long. Weld plates shall be anchored into concrete panels and welded together with a continuous weld. Adhesive shall be applied for the entire length of the seam. Grout formed keyway to provide smooth cove between walls and floor.

f. The joint between building and vault shall be sealed gas-tight with continuous butyl tape or flexible joint material such as neoprene rubber, Ram-Nek, and sealant.

13. Painting and Staining

a. Apply materials in strict accordance with manufacturer's recommendations.

b. Examine work to ensure all surfaces are properly prepared to receive finish.

1) Allow a minimum of 14 days curing time for concrete before paints are applied to concrete. Allow longer curing time when recommended by paint manufacturer.

2) If needed to ensure uniform application, prepare concrete surface for application of paints by acid etching with a 30 percent solution of hydrochloric acid. Flush with water and allow to thoroughly dry.

c. Painting shall NOT be done under the following condition:

1) Outside in cold, frosty, foggy, or damp weather.

2) In winter unless temperature is 50°F or over and surfaces are dry and hard.

3) In dusty areas.

d. Apply coats, additional to those shown in the Schedule of Finishes, when undercoats or other conditions show through final coat of paint, until paint film is of uniform finish, color, and appearance.

e. Gray concrete epoxy paint on the floor shall also cover the cove at the junction between wall and floor. The line between the gray floor and the white wall shall be straight and parallel to the floor.

f. Schedule of Finishes:

1) Metalwork: Steel doors, door vents and frames, window frames, vault access lids and frames, and roof posts.

i. One coat metal primer.

ii. Two coats enamel.

2) Interior concrete surfaces

i. Walls and ceiling of building: 1 coat latex block filler and minimum 2 coats paint/pigmented sealer. Pigmented sealer shall be followed by 1 coat of clear sealer.

ii. Interior floor: Primer coat and minimum 2 coats of epoxy paint.

3) Exterior slab: 1 coat of clear penetrating sealer.

4) Exterior surfaces of building walls, roof, and screens, which will not be painted: 2 coats stain followed by 1 coat sealer.

i. Seal colored concrete as recommended by the manufacturer of the concrete color, if different from above.

g. Cleanup: Repair all defects and remove all paint spatters, etc.

h. Protect interior painted surfaces from direct exposure to sunlight and weather during manufacture, assembly, and installation.

14. Accessories

a. Attach grab bars and toilet paper holder to walls at the heights required for ADA. Fastening system must be able to withstand 300-pound loading of each grab bar and on top of toilet paper holder.

b. Install coat hook a maximum of 48" above the floor.

c. Install “Teton Raptor” vent stack wildlife screen according to manufacturer’s instructions.

15. Metal Doors and Frames

a. Install steel door and frame in accordance with manufacturer's recommendations. Fit door accurately in frame. Mount louvers on door, if required, with cadmium-or zinc plated corrosion resistant Phillips head metal screws

b. Install hardware in accordance with hardware manufacturer's instructions after finish paintwork is completed. Install a sweep on bottom of door and adjust so it contacts the floor when door is closed. Install door bumper on vestibule wall to meet door handle.

c. Adjust hinge tension after building is installed so that the maximum force necessary for pushing or pulling the door open is 5 pounds and the door takes at least three seconds to move from 70 degrees open to within three inches of the latch. Verify smooth operations of door and hardware. Adjust as necessary to provide smooth operation and required hinge tension.

16. Windows

a. Exterior steel frame shall be installed in concrete panel using headed anchor studs.

b. Install glazing and interior steel frame using tamper proof screws.

17. Vault Cleanout Covers

a. After paint on lid has completely cured, install full length/width neoprene gasket seal to cleanout cover lid to assure gas-tight seal when lid is locked in place. Do not stretch seal material during application. Damaged, degraded, or non-airtight seals are not acceptable and must be replaced at the Contractor's expense.

18. Signs

a. Install signs in cast-in recesses on toilet building walls using tamper-proof masonry anchors at each corner.

D. Measurement and Payment

1. Payment is included in the Lump Sum payment of items 1,2,8,12,9,10,11, and 13.

END OF SECTION