A_-_Single_Vault_Toilet_Specifications.docx

PRE-CAST VAULT TOILET BUILDING – SOLICITATION NO AG-04GG-S-16-0016

Specifications

• Successful contractor shall deliver one new prefabricated concrete toilet building to the project site. The toilet building shall be delivered and fully installed at the Ten Mile Sno-Park by the contractor. Maps and directions to the delivery location have been provided. Install toilet building per Design Criteria.

Toilet building to be installed at Ten Mile Sno-Park must meet the salient Characteristics of a single vault CXT Model Cascadian or approved equal.

The salient Characteristics are:

• Precast concrete toilet shall be a one tone color similar to CXT’s Nuss Brown; simulated cedar shake roof, wall patterns shall be a board and batt texture for the CXT Model Cascadian or approved equal.

• Privacy latch ADA handle with Forest Service supplied lock cylinder.

• Unisex and ADA accessible signing.

• Accessible in accordance with current ADA standards.

• Black plastic pipe installed on southern facing back wall to vent the building in a manner that create a continual air flow through louvered vents located in the building near the floor. The air flows down the riser, through the vault, and up and out the vent pipe. This design should vent the vault through the vent pipe and keep the building odor-free.

• Stainless Steel Vent Guard installed on tops of all vent pipes for the protection of wildlife.

• 1 - 1000 gallon capacity concrete waste vault.

• Toilet shall conform to all design criteria unless otherwise approved.

DESIGN CRITERIA

1.0 DESIGN CRITERIA

The toilet shall be designed to meet the following criteria. The design criteria are to ensure that the toilet not only will withstand the forces of nature listed below but to provide protection from vandalism and other unforeseen hazards; such as fires, bullets & vehicles being driven into them.

A. Snow Load

1. The precast concrete toilet will withstand a snow load of 350 pound per square foot snow load.

B. Wind Load

1. The precast concrete toilet will withstand the effects of a 120 mile per hour wind load.

C. Earthquake

1. The toilet will withstand the effects of a seismic design category E earthquake or a zone 4 earthquake.

D. Additional Design Standards

1. The toilet shall be designed to meet the requirements of the sixty-inch turning radius inside toilet room specified by the American with Disabilities Act Requirements and Uniform Federal Accessibility Standards as of the date of these specifications.

2. The toilet shall have black plastic pipe installed on southern facing back wall to vent the building in a manner that create a continual air flow through louvered vents located in the building near the floor. The air flows down the riser, through the vault, and up and out the vent pipe. This design should vent the vault through the vent pipe and keep the building odor-free.

3. The toilet shall have a one-piece full length and width vault units to support the building, screen area and snow loads evenly. The toilet shall have a one piece floor unit to prevent panels that migrate in different direction during periods of freeze/thaw stress and to withstand transportation stresses.

4. The single vault Cascadian is an all concrete design with a minimum 7/12 roof pitch.

2.0 MATERIALS

A. Concrete - General

The concrete mix design shall be designed to ACI 211.1 to produce concrete of good workability.

1. Concrete will contain a minimum of 675 pounds of cement per cubic yard. Cement will be a low alkali type I or III conforming to ASTM C-150.

2. Coarse aggregates used in the concrete mix design will conform to ASTM C33 with the designated size of coarse aggregate #67.

3. Minimum water/cement ratio shall not exceed 0.45. Slump shall not exceed 4”.

4. Air-entraining admixtures will conform to ASTM C260. Water reducing admixtures will conform to ASTM C494, Type A. Other admixtures will not be used without Forest Service approval.

B. Colored Concrete

1. Color additives will conform to ASTM C979. Provide a “Nuss Brown” 12”x12”x1” color sample or approved equal for Forest Service approval.

2. The following shall contain colored concrete:

a. Toilet building roof panels

b. Building walls

c. Screen panels

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

4. All ingredients shall be weighed and the mixing operation shall be adequate to ensure uniform dispersion of the color pigment throughout the concrete mix.

C. Cold Weather Concrete

1. Cold weather concrete placement will be in accordance with ACI 306.

2. Concrete shall not be placed if ambient temperature is expected to be below 35 degrees F. during the curing period unless heat is readily available to maintain the surface temperature of the concrete at least 45 degrees F.

2.0 MATERIALS (Continued)

3. Materials containing frost or lumps of frozen materials will not be used. Remove all snow, ice, and frost from surfaces, including reinforcement.

D. Hot Weather Concrete

Placement shall be in accordance with ACI 305. The temperature of the concrete shall not exceed 95 degrees F. at the time of placement. When the ambient temperature reaches 90 degrees F. the concrete shall be protected with a moist covering.

E. Concrete Reinforcement

1. All reinforcing steel will conform to ASTM A615. All welded wire fabric will conform to ASTM A185.

2. All reinforcement will be new, free of dirt, oil, paint, grease; loose mill scale and loose or thick rust when placed.

3. Steel reinforcement will be centered in the cross-sectional area of the walls and will have at least 1” of cover on the under surface of the floor and roof.

4. The maximum allowable variation for center-center spacing of reinforcing steel will be ½”.

5. Full lengths of reinforcing steel will be used when possible. When splices are necessary on long runs, splices will be alternated from opposite sides of the components for adjacent steel bars. Lap bars #4 or smaller a minimum of 12”. Lap bars larger than #4 a minimum of 24 bar diameters.

6. Reinforcing bars will be bent cold. No bars partially embedded in concrete will be field bent unless approved by the Forest Service.

F. Sealers and Curing Compounds

1. Curing compounds, if used, will be colorless, complying with ASTM C309, type I or 1-D.

2. Weatherproofing sealer for exterior of building will be a clear water repellent penetrating sealer.

G. Caulking, Grout, Adhesive and Sealer

1. Caulking service temperatures from -40 to +194 degrees Fahrenheit.

2. Interior and exterior joints shall be caulked with a paintable polyurethane sealant.

2.0 MATERIALS (Continued)

3. Grout shall be a non-shrink type and shall be painted to match the color of surrounding concrete as close as possible.

4. Cement base coating shall be formulated with a very fine aggregate system and a built in bonding agent.

H. Paint

1. All paints and materials shall conform to all Federal specifications or be similar “top-of-the-line-components”. Paints shall not contain more than .06 percent by weight of lead.

2. Type of paints for toilets

a. Inside concrete surfaces

I. Interior floors will be a 2-component, catalyzed, water borne polyamide epoxy with a micronized polymer additive to provide uniform slip resistant texture and be chemical resistant. The color shall be gray.

II. Interior walls and ceilings will be a modified acrylic, water repellent penetrating stain. The color will be white followed by a clear acrylic anti-graffiti sealer.

b. Metal surfaces both inside and out

I. DTM ALKYD

c. Exterior concrete surfaces

I. Exterior slab shall have a clear sealer placed on it

II. Exterior walls and roof shall be a water repellent penetrating stain in the same color as the walls or roof followed by a clear acrylic anti-graffiti sealer.

I. Grab bars

Grab bars will be 18 gauge, type 304 stainless steel with 1-1/2” clearance. Grab bars shall each be able to withstand 300 pound top loading.

J. Toilet Paper Dispenser

Dispenser shall be constructed of ¼” thick, type 304 stainless steel. Dispenser shall be capable of holding two standard rolls of toilet paper. Toilet paper holder fastening

2.0 MATERIALS (Continued)

system shall be able to withstand 300 pound top loading.

K. Steel Doors

1. Doors shall be a flush panel type 1-3/4” thick, minimum 16 gauge galvanized steel, top painted with DTM ALKYD.

2. Door frames will be knockdown or welded type, single rabbet minimum 16 gauge galvanized steel top painted with DTM ALKYD, width to suit wall thickness. Three rubber door silencers shall be provided on latch side of frame.

3. Maximum effort to operate door shall not exceed 5 lbf (per 2007 CBC 1133B.2.5)

L. Door Hinges

Door hinges will be 3 per door with dull chrome plating 4-1/2”x4-1/2”, adjustable tension, and automatic-closing for each door.

M. Lockset

1. Lockset will meet ANSI A156.2 Series 4000, Grade 1 cylindrical lockset for exterior door.

2. Lever handle shall be located on both inside and out.

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

4. Push-button shall automatically release when inside lever handle is turned or door is closed.

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

6. Inside lever always active.

N. Dead Bolt

Deadbolt will be a Forest Service supplied Cylinder #1152 only lock.

O. Door Stop

Doorstop will be a dome style stop meeting ANSI 156.16.

2.0 MATERIALS (Continued)

P. Double Coat Hook

Coat hook will be 304 stainless steel 16 gauge (1.5mm), formed construction with a satin finish and have 3/16”x 7/8” nail in anchor. Upper hook will extend at least 2-1/2” inches from the wall. Lower hook will extend at least 1-1/4” from the wall.

Q. Door Sweep

Door sweep will be provided at the bottom of door and will be an adjustable brush type.

R. Wall Vent

Wall vent will be anchored into the concrete wall. The units’ frame will be C3x4.1 channel steel. The louver frame and louvers will be 18 gauge zinc coated steel with a baked enamel finish or approved alternative. Vent to come with insect screen. Upon entering the room the wall vent for the CXT Model Cascadian or approved equal will be placed on the right-side to provide air flow from the prevailing wind direction.

S. Windows and Vault Cleanout Cover

1. Windows and cleanout cover frames shall be constructed from steel.

2. Window glazing will be 3/16” thick translucent pebbled finished mar-resistant Lexan.

3. Plate for vault cleanout cover will be ¼” thick diamond plate steel. Lid will be hinged and configured so that it can be locked with a padlock. A gasket shall be provided around the entire width and length of the lid to provide an airtight seal.

4. Windows frames to have vandal resistant fasteners.

T. Vault Liner

The vault liner shall be made from a single sheet black ABS/750 virgin plastic and can hold up to 1,000 gallons of waste. Vaults with the ABS liner shall be warranted against leaks for a period of seven years minimum into and out of the vault itself.

U. Roof Insulation

Ceiling anchored ½” plywood + fiberglass laminate + 2” polyurethane foam. Approximately R-19 Fiberglass Insulation.

3.0 MANUFACTURE

A. Mixing and Delivery of Concrete

Mixing and delivery of concrete will be in accordance with ASTM C94, section 10.6 through 10.9.

B. Placing and Consolidating Concrete

Concrete will be consolidated by the use of mechanical vibrators. Vibration will be sufficient to accomplish compaction but not to the point that segregation occurs.

C. Finishing Concrete

1. Interior floor and exterior slabs shall be floated and troweled. A light broom finish will be applied to the exterior and interior slabs.

2. All exterior portions of the 10 Mile Sno-Park toilet building walls and exterior screen walls shall be a board & batt texture with horizontal lap siding or approved alternative.

3. All exterior surfaces of the roof panels shall be cast to simulate a cedar shake roof. The underside of the overhang shall have a smooth finish.

D. Cracks and Patching

1. Cracks in concrete components which are judged to affect the structural integrity of the building will be rejected.

2. Small holes, depressions and air voids shall be patched with a suitable concrete material. The patch shall match the finish and texture of the surrounding surface.

3. Patching will not be allowed on defective areas if the structural integrity of the building is affected.

E. Curing and Hardening Concrete

1. Concrete surfaces shall not be allowed to dry out from exposure to hot, dry weather during initial curing period.

4.0 FINISHING AND FABRICATION

A. Structural Joints

1. Wall components shall be joined together with two welded plate pairs at each joint. Each weld plate shall be 6” 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 the concrete panel and welded together with a continuous weld. The inside seams shall be a paintable caulk. The outside seams will use a caulk in a coordinating building color or clear.

2. Walls and roof will be joined with weld plates, 3”x 6”, at each building corner.

3. The joint between the floor slab and walls will be joined with a grout mixture on the inside, a matched colored caulk on the outside and two weld plates 6” long per wall.

B. Painting/Staining

1. An appropriate curing time shall be allowed before paint is applied to concrete.

2. Some applications may require acid etching. A 30% solution of hydrochloric acid will be used, flushed with water and allowed to thoroughly air dry.

3. Painting shall not be done outside in cold, frosty or damp weather.

4. Painting shall not be done outside in winter unless the temperature is 50 degrees F. or higher.

5. Painting shall not be done in dusty areas.

6. Schedule of finishes

a. Inside concrete surfaces

I. Inside floors will be 1 coat of 1-part water based epoxy with a silica sand suspension to provide uniform texture.

II. Interior walls and ceilings will be 2 coats of a modified acrylic, water repellent penetrating stain, followed by 1 coat of clear sealer.

b. Metal surfaces both inside and out

I. 2 coats of DTM ALKYD

c. Exterior concrete surfaces

I. Exterior slab will be 1 coat of clear sealer

4.0 FINISHING AND FABRICATION (Continued)

II. Exterior walls will be 2 coats of water repellent penetrating stain in the same color as the walls or roof followed by 1 coat of clear acrylic anti-graffiti sealer.

5.0 TESTING

A. Concrete Testing

1. The following tests shall be performed on concrete used in the manufacture of toilets. All testing shall be performed in recognized laboratories. Testing shall only be performed by qualified individuals who have been certified ACI Technician Grade 1. Sampling shall be in accordance with ASTM C172. Supply all test results to the Forest Service for approval. The Forest Service may test the product at any time throughout the process.

a. The slump of the concrete shall be performed on the first batch of concrete in accordance with ASTM C143. This slump shall be in the 3" - 4" range.

b. The air content of the concrete shall be checked per ASTM C231 on the first batch of concrete. The air content shall be in the range of 5.0% +/- 2%.

c. The compressive strength of the cylinders shall be tested to ASTM C39. Test Include: One (1) cylinder for release, one (1) for 7 days and one (1) for 28 days. The release must be a minimum strength of 2500 psi, the 7-day must be a minimum of 4500 psi and the 28-day must be a minimum of 5000 psi.

6.0 INSTALLATION

A. Scope of Work

Work specified under this Section includes full installation of toilet building: excavation, bedding material hauling and placement, backfill, compaction, cleanup and placement of a precast concrete vault toilet. Ensure that water on the floor slab drains toward the door. Install Wildlife-Excluding Device/Owl Guard on top of vent pipe.

B. Materials

1. Bedding aggregate material to be hauled from the Paulina Prairie Rock Quarry. Remove foreign debris from surface of aggregate pile before loading aggregate for hauling.

2. Caulking between vault and toilet floor to be 1”x1” Butyl tape designed specifically to bond precast concrete to precast concrete.

C. Location

The Forest Service will be responsible for the following:

6.0 INSTALLATION (Continued)

1. Providing the exact location by stakes or as shown on maps or plans

2. Providing a clear and level site free of overhead and/or underground obstructions

3. Providing access to the site for truck delivery and sufficient area for the crane to install and the equipment to perform the contract requirements.

D. Access to Site

Delivery to the 10 Mile Sno-Park on the Deschutes National Forest site made on normal highway trucks and trailers to a location within the Sno-park a minimum of 5 feet off of paved surface. Delivery to the Forest Service’s Scott Street Compound site made on normal highway trucks and trailers to a location within the compound on a gravel surface road. The contractor shall be responsible for delivering the pre-manufactured restrooms to the specified sites.

E. Excavation and Elevation

1. Comply with all applicable OSHA Standards for excavation.

2. Excavate for the installation of the toilet vault to a depth that will allow the structure site to be free draining after installation is completed. Allow for a 2” leveling course beneath the toilet vault. Stockpile topsoil in a separate pile at site.

3. Finish floor elevation shall be 12” inches above natural grade measured at the front (entrance) of the exterior slab unless otherwise approved by the Forest Service. Ideally, the back of the building should be slightly higher to allow water to freely drain out of the toilet rooms. The Forest Service may specify a finished floor elevation for buildings at some sites. The contractor will install buildings at these sites with the floor elevation within a plus or minus 0.05 feet of the specified floor elevation.

4. No excavation will be left open more than seven days unless otherwise approved by the customer.

5. All excavations left open overnight will be fenced with wire mesh or plastic mesh fence secured to steel posts all around the excavation.

a. The bottom of the fence will generally follow the contour of the ground.

b. Maximum spacing of the steel posts will be ten feet.

c. Minimum height of the fence will be 36 inches.

6.0 INSTALLATION (Continued)

6. Contractor may encounter water table. If Contractor encounter water table during excavation for the restroom, Contractor shall follow the manufacturer’s recommendations.

F. Backfill and Compaction

1. Compact the natural ground at the bottom of the vault excavation with a minimum of three passes with a whacker-type mechanical compactor or equivalent approved by the Forest Service.

2. Install aggregate bedding material for leveling course from the Paulina Prairie Rock Quarry. Compact the leveling course with one pass with a whacker-type mechanical tamper or equivalent approved by the customer. Grade leveling course so there will be no high spots in the middle of the vault bottom. Compact with a second pass with a whacker or approved equivalent tamper.

3. Set vault in place and check for level. Backfill around the vault structure. Use excavated material for backfill except those rocks larger than six inches in maximum dimension which shall not be placed within six inches of the exterior vault walls.

4. Fill, adjacent to the building entry, will have excavated material placed in eight inch loose lifts and compacted with a minimum of two passes with a whacker-type mechanical compactor of equivalent approved by the Forest Service.

G. Finish Grading

1. Spread excess excavated material from the vault around structure. Intended final grade is flush with the top of the front slab. Allow for placement of topsoil to reach that grade. Grade backfill away from structure at maximum slope of five (5) percent unless otherwise approved by Forest Service.

2. Spread stockpiled topsoil as final layer after rough grading is completed. Areas disturbed by excavation, backfilling and stockpiling of excavated materials will be hand raked to remove exposed rocks over one inch in maximum dimension. Oversized rocks removed from the surface shall be disposed of in a designated area within 200 feet of the site.

H. Vault Toilet Riser and Accessories

1. Polyurethane caulk will be applied between toilet riser flange and concrete floor before the toilet riser is installed.

2. Use 100 percent silicone caulk. GE Silicone II, 800-626-2000, or approved equal.

6.0 INSTALLATION (Continued)

I. Exhaust Pipe Installation

1. After exhaust pipe is installed, seal around pipe at top and underside of roof with polyurethane caulk or approved alternative. Seal around pipe at top of floor slab will be accomplished by using polyurethane caulk or approved alternative. Install Wildlife-Excluding Device on top of vent pipe.