SECTION 13121
PRE-ENGINEERED BUILDINGS
PART 1 GENERAL
1.1 SECTION INCLUDES
A. Pre-engineered, pre-cast concrete toilet building.
B. Pre-cast concrete waste vault.
C. Building components and accessories.
1.2 REFERENCES
A. ACI 1211.1 - Recommended Practice for Selecting Proportions for Normal and
Heavyweight Concrete
B. ASTM C33 - Concrete Aggregates.
C. ASTM C39 - Method of Test for Compressive Strength of Cylindrical Concrete
Specimens
D. ASTM C143 - Method of Test for Slump of Concrete
E. ASTM C150 - Standard Specification for Portland Cement
F. ASTM C192 - Method of Making and Curing Test Specimens in the Laboratory
G. PCI MNL 116 - Quality Control for Plants and Production of Precast Prestressed
Concrete Products
1.3 DESIGN REQUIREMENTS
A. Uniform Construction Code:
1.
Designed to meet the requirements of the Pennsylvania Uniform Construction
Code, as adopted at the time of bidding.
B. Floor Live Load
1.
Withstand a distributed floor live load of 100 pounds per square foot
C. Snow Load:
1.
Withstand a snow load of 50 pound per square foot.
D. Wind Load:
1.
Withstand the effects of 100 mile per hour wind load, 3 – second wind gust.
E. Earthquake:
1.
Withstand the effects of a zone four earthquake.
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F. Additional Design Standards:
1. Designed to meet the requirements of the Americans with Disabilities Act,
Americans with Disabilities Act Accessibility Guidelines, and ANSI A117.1 2003.
2.
Incorporate all design aspects of Sweet Smelling Technology as outlined by Briar
Cook for the U.S. Forest Service, or an approved equal.
3.
One, one-piece full length and width vault units designed to support the building,
screened area, and snow loads evenly. One-piece floor unit designed to prevent
wall panels from migrating in different directions during periods of freeze/thaw
stress.
1.4 MANUFACTURER CRITERIA
A. The manufacturer supplying the requested precast concrete vault facility must meet the
following:
1.
Manufacturing plant must be PCI certified at the time of bid.
2.
Manufacturer must provide sealed design drawings.
3.
Manufacturer must show experience with Sweet Smelling Technology, or an
approved equal, by submitting four examples of currently in-use concrete vault
toilet facilities produced by the manufacturer and installed by, or under the
supervision of, the manufacturer.
1.5 SUBMITTALS
A. Within 14 calendar days of execution of the contract and issuance of the Notice to
Proceed, the Contractor shall submit shop drawings and specifications to the
Department for review. Within 14 calendar days of receipt from the Department of
approval of the shop drawings, the Contractor shall submit sealed design drawings,
specifications, and calculations to the Department for use in obtaining the Building
Permit.
B. Product Data: Provide manufacturers’ descriptive data on installed components,
component dimensions, fixtures, equipment, fasteners, and other items used in
assembling the completed building.
C. Shop Drawings: Indicate assembly dimensions, connections, attachments, openings,
design loads, general construction details, anchorages and method of anchorage,
installation methods, and materials. Shop drawings shall include architectural and
structural. Provide seven (7) copies of shop drawings for each type of building
provided.
D. Specifications: Provide specifications describing aspects of the structure, design,
fabrication, and installation not provided on the shop and design drawings. Provide
seven (7) copies of specifications for each type of building provided.
E. Design Drawings: Provide architectural and structural drawings containing information
as required by the Pennsylvania Department of Labor and Industry for inclusion in a
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general building permit application. Requirements are available on L&I's web site at
www.dli.state.pa.us/codes. Provide four (4) copies of design drawings for each building
provided.
1.
Sealed design drawings shall be prepared, reviewed, and bear the stamp of a
Registered Architect or Professional Engineer licensed in the Commonwealth of
Pennsylvania.
F. Calculations: Provide detailed engineering calculations indicating design and code
required values for specified loads and demonstrating that building components meet or
exceed building code requirements. Provide one (1) copy of calculations for each
building provided.
1.
Calculations shall be prepared, reviewed, and bear the stamp of a Registered
Architect or Professional Engineer licensed in the Commonwealth of Pennsylvania.
G. Fabrication Certification: Provide a letter bearing the stamp and signature of a
Registered Architect or Professional Engineer licensed in the State of Pennsylvania
certifying that the construction of the fully assembled modular building that is hidden
from view and unable to be inspected at the installation site will fully comply with all
requirements of the Pennsylvania Uniform Construction Code.
H. Material Certifications: Provide concrete test reports indicating design and tested
strengths of concrete used in the toilet buildings and vaults.
I
Manufacturer's Instructions: Indicate site preparation requirement, installation method,
and site finishing requirements.
J.
Color Charts: Provide color charts for the different components, accessories, and
finishes representing the manufacturer's full range of colors.
K. Texture Charts: Provide texture charts for the different components representing the
manufacturer's full range of textures.
L. Operation & Maintenance Manuals: At the completion of the work provide bound
operation maintenance manuals to the Department. The Manuals shall contain cleaning
and maintenance instructions, wiring diagrams, warranties, a copy of all approved
submittals, other information required for the operation of all systems, and information
on all finishes and equipment. Bind operation and maintenance data in 8-1/2 inch by 11inch, 3-ring binders with durable plastic covers. Provide two (2) copies of O&M
Manuals for each type of building provided.
M. Color Sample: Provide 12” x 12: samples showing selected colors and patterns.
1.6 WARRANTY
A. Provide one year manufacturer warranty for repair or replacement of defective material,
products, components, or accessories.
B. Provide seven year manufacturer warranty for vault against leakage.
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1.7 DELIVERY, STORAGE, AND HANDLING
A. The Contractor shall be responsible for all aspects of delivery and installation, including
transportation, lifting, and setting the building: except for the following:
1. The Department will perform excavation, backfilling, finish grading, tree removal,
and parking area requirements.
B. Deliver, handle, and store products, equipment, materials, and assemblies in accordance
with manufacturer's requirements.
C. Verify the planned delivery route meets all manufacturer's requirements, including
width, weight, and height restrictions.
D. Obtain required permits and approvals for transport and delivery of products,
equipment, materials, and assemblies.
1.8 PERMITS
A. The Department will obtain a Building Permit using documents provided by the
Contractor showing the proposed design and fabrication of the building. Failure by the
Department to obtain the Building Permit due to uncorrectable conditions caused by the
Contractor's design and fabrication shall be grounds for cancellation of the Contract.
Compensation will be limited to actual services rendered and product received. The
Contractor shall not begin building fabrication until notification from the Department of
receipt of a building permit.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. Pre-Engineered Buildings:
1.
CXT, Incorporated; Spokane Industrial Park, 3808 North Sullivan Road, Building
7, Spokane, WA 99216; Phone 800-696-5766; www.cxtinc.com.
2.
Or approved equal.
2.2 PRE-ENGINEERED BUILDING
A. Double toilet room precast concrete building assembled from textured and colored
concrete panels, setting on one precast plastic lined waste vault, and equipped with all
fixtures and toilet room accessories.
1.
Similar and equal to the “Double Rocky Mountain with a chase" model as
manufactured by CXT Incorporated.
a. Optional solar fan kit
b. Separate men’s and women’s room; urinal in men’s room
c. Hand sanitizers
d. Stainless steel mirror
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B. Building: Single unit containing two toilet rooms with chase; 3" thick (min) reinforced
concrete panels; 7" in 12" roof pitch min. with cedar shake texture; and lap siding and
Napa Valley Rock exterior wall texture.
C. Waste Vault: 4" thick reinforced concrete; floor sloped to clean out end; ABS, or equal,
lined; dimensions matching the perimeter of the building; capable of providing a stable
footing to support the full weight of the building plus all required design loads; sized to
accommodate 15,000 uses and 1,000 gallons each.
2.3 MATERIALS
A. Concrete - General
1.
The concrete mix design shall be designed to ACI 211.1 to produce concrete of
good workability.
2.
Concrete shall contain a minimum of 610 pounds of cement per cubic yard. Cement
shall be a low alkali type I or III conforming to ASTM C-150.
3.
Coarse aggregates used in the concrete mix design shall conform to ASTM C33
with the designated size of coarse aggregate #67.
4.
Minimum water/cement ratio shall not exceed .45. Slump shall not exceed 4”.
5.
Air-entraining admixtures shall conform to ASTM C260. Water reducing
admixtures shall conform to ASTM C494, Type A. Other admixtures shall not be
used without customer approval.
B. Colored Concrete
1.
Color additives shall conform to ASTM C979.
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.
C. Concrete Reinforcement
1.
All reinforcing steel shall conform to ASTM A615. All welded wire fabric shall
conform to ASTM A185.
2.
All reinforcement shall be new, free of dirt, oil, paint, grease, loose mill scale and
loose or thick rust when placed.
3.
Details not shown on drawings or specified shall be in conformance with ACI 318.
4.
Steel reinforcement shall be centered in the cross-sectional area of the walls and
shall have at least 1” of cover on the under surface of the floor and roof.
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5.
The maximum allowable variation for center-center spacing of reinforcing steel
shall be ½”.
6.
Full lengths of reinforcing steel shall be used when possible. When splices are
necessary on long runs, splices shall 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.
7.
Reinforcing bars shall be bent cold. No bars partially embedded in concrete shall
be field bent unless approved by the Department.
D. Sealers and Curing Compounds
1.
Curing compounds shall be colorless, low-gloss, complying with ASTM C309,
type I or 1-D.
2.
Weatherproofing sealer for exterior of building shall be a low-gloss clear water
repellent penetrating sealer.
2.4 COMPONENTS
A. Caulking, Grout, Adhesive and Sealer
1.
All caulking shall remain flexible and non-sag at temperatures from -40 to +140
degrees Fahrenheit.
2.
Interior joints shall be caulked with a paintable polyurethane sealant.
3.
Exterior joints shall be caulked with a tripolymer sealant caulk matching the
exterior color.
4.
Grout shall be a non-shrink type and shall be painted to match the color of
surrounding concrete.
5.
Epoxy concrete adhesive shall be two component, rigid, non-sag gel adhesive for
bonding to dry or damp surfaces, moisture insensitive.
6.
Cement base coating shall be formulated with a very fine aggregate system and a
built in bonding agent.
7.
Caulking between vault and toilet floor shall be 1”x1” Butyl tape.
B. Paint
1. All paints and materials shall conform to all Federal specifications. Paints shall not
contain more than .06 percent by weight of lead.
2. Type of paints:
a. Inside concrete surfaces:
1) Interior floors shall be a 2-component, catalyzed, water borne polyamide
epoxy with a micronized polymer additive to provide uniform slip
resistant texture.
2) Interior walls and ceilings shall be a modified acrylic, water repellent
penetrating stain.
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b. Metal surfaces both inside and out:
1) DTM ALKYD.
c. Exterior concrete surfaces:
1) Exterior slab shall be low-gloss clear sealer.
2) Exterior walls and roof shall be a water repellent penetrating stain
followed by a low-gloss clear acrylic anti-graffiti sealer.
C. Toilet Risers
1.
One piece, 18" high, double wall, cross-link polyethylene, smooth surface, with
high-impact styrene plastic seat and lid with stainless steel hardware.
D. Grab bars
1.
Grab bars shall be 18 gauge, type 304 stainless steel with 1-1/2” clearance. Grab
bars shall each be able to withstand 300 pound top loading.
E. Toilet Paper Dispenser
1.
Dispenser shall be constructed of ¼” thick, type 304 stainless steel. Dispenser shall
be capable of holding two (2) 12-inch rolls of toilet paper. Toilet paper holder
fastening system shall be able to withstand 300 pound top loading.
F. Double Coat Hook
1.
Coat hook shall 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 shall extend at least
2-1/2” inches from the wall. Lower hook shall extend at least 1-1/4” from the wall.
2.
Mounting Height: 48" above finish floor.
G. Baby Changing Table
1.
No baby change stations.
H. Steel Doors
I.
1.
Doors shall be flush panel type 1-3/4” thick, minimum 16 gauge prime coated steel
panels.
2.
Door frames shall be welded type, single rabbet, minimum 16 gauge prime coated
steel, width to suit wall thickness. Three (3) rubber door silencers shall be provided
on latch side of frame.
Door Hinges
1.
J.
Door hinges shall be 3 per door with dull chrome plating 4-1/2”x4-1/2”, adjustable
tension, automatic-closing for each door.
Lockset
1.
Cylindrical Lockset:
a. Best Access Systems Model 9K, or approved equal.
b. Function: Dormitory T (F90)
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1)
2)
3)
4)
c.
d.
e.
2.
Lever operable for either side.
Locked from outside by key and inside by push button.
Unlocked from outside by key.
Unlocked from inside by turning inside lever and by closing the door
(retracting latchbolt).
Finish: US26D.
Lockset shall meet ANSI A156.2 Series 4000, Grade 1 cylindrical lockset for
exterior door.
Replaceable core.
Keying:
a. Keyed to match the Department's keying system.
b. All locks within each building shall be keyed alike.
c. Provide 2 keys for each lock.
K. Dead Bolt
1.
Best Access Systems Model 83R, or approved equal.
2.
Function:
a. Operable by key from outside only.
b. Locked from outside by key.
c. Unlocked from outside by key and inside by turn lever.
d. Inside turn lever retracts bolt only but will not extend bolt.
3.
Finish: 626 - Satin Chromium.
4.
Bolt: 5/8" x 7/8" with 1" throw.
5.
Tapered cylinder ring.
6.
Replaceable core.
7.
Keying:
a. Keyed to match the Department's keying system.
b. All locks within each building shall be keyed alike.
c. Provide 2 keys for each lock.
L. Door Stop
1.
Doorstop shall be a dome style stop meeting ANSI 156.16.
M. Door Sweep
1.
Door sweep shall be provided at the bottom of door and shall be an adjustable
brush type.
N. Signs
1.
Plastic signs mounted as shown on the drawings with tamper-resistant stainless
steel screws.
O. Wall Vent
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1.
Wall vent shall be cast into the concrete wall. The unit's frame shall be C3 x 4.1
channel steel of 18 gauge zinc coated steel with baked enamel finish. The louver
shall be sight-proof. There shall be an exterior insect screen attached to the louver.
P. Windows
1.
Windows and cleanout cover frames shall be constructed from steel.
2.
Window glazing shall be ¼” thick translucent pebble finished mar-resistant Lexan.
Q. Vault Cleanout Cover
1.
Plate for vault cleanout cover shall be ¼” thick diamond plate steel. Lid shall be
hinged and configured so that it can be locked with a padlock. A neoprene gasket
shall be provided across the entire width and length of the lid to provide an airtight
seal.
R. Vault Liner
1.
The vault liner shall be made from a single sheet black ABS/752 virgin plastic, or
an approved equal. The liner is to be attached to all sides of vault by means
recommended by the manufacturer. Water based acrylic coatings, similar to CS-55
by ConSeal Concrete Sealants, are permitted and shall be applied to the full area of
all internal vault surfaces. All vaults with liner shall be warranted against leaks for
a period of seven years.
S. Vent Stack
1.
12" Black PVC pipe extending continuous from waste vault chamber to above the
roof ridge.
T. Stainless Steel Mirrors
1.
Stainless steel mirrors shall be two (2) mirrors, each measures 18” W x24”H.
2.
Product shall be Bradley Model 748 or an approved equal.
3.
20 gauge stainless steel, polished to No.8 architectural bright finish.
4.
Backing: tempered Masonite bonded to mirror with adhesive.
2.5 FABRICATION
A. Fabrication of the structure should not commence until notification from the
Department of receipt of a Building Permit. Fabrication prior to notification by the
Department shall be at the Contractor's or Vendor’s risk.
B. Mixing and Delivery of Concrete
1.
Mixing and delivery of concrete shall be in accordance with ASTM C94, section
10.6 through 10.9 with the following additions:
a. Aggregate and water shall be adjusted to compensate for differences in the
saturated surface-dry condition.
b. Concrete shall be discharged as soon as possible after mixing is complete. This
time shall not exceed 30 minutes.
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C. Placing and Consolidating Concrete
1.
Concrete shall be consolidated by the use of mechanical vibrators.
2.
Vibration shall be sufficient to accomplish compaction but not to the point that
segregation occurs.
D. Cold Weather Concrete
1.
Cold weather concrete placement shall 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.
3.
Materials containing frost or lumps of frozen materials shall not be used.
E. Hot Weather Concrete
1.
The temperature of the concrete shall not exceed 80 degrees F at the time of
placement and when the ambient reaches 90 degrees F the concrete shall be
protected with moist covering.
F. Finishing Concrete
1.
Interior floor and exterior slabs shall be floated and troweled. A light broom finish
shall be applied to the exterior slabs.
2.
All exterior building walls and exterior screen walls shall be horizontal wood siding
and stone textures.
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.
G. 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 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.
H. Curing and Hardening Concrete
1.
Concrete surfaces shall not be allowed to dry out from exposure to hot, dry weather
during initial curing period.
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I.
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 shall use a caulk matching the building color.
2.
Walls and roof shall be joined with weld plates, 3”x 6”, at each building corner.
3.
The joint between the floor slab and walls shall be joined with a grout mixture on
the inside, a matched colored caulk on the outside and two weld plates 6” long per
wall.
2.6 FINISHES
A. 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
shall 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:
1) Inside floors shall be 1 coat of 1-part water based epoxy with a silica sand
suspension to provide uniform texture. The color shall be gray.
2) Interior walls and ceilings shall be 2 coats of a modified acrylic, water
repellent penetrating stain, followed by 1 coat of clear sealer. The color
shall be white.
b. Metal surfaces both inside and out:
1) 2 coats of DTM ALKYD. The color shall be as selected by the
Department from the manufacturer's standard colors.
c. Exterior concrete surfaces:
1) Exterior slab shall be 1 coat of low-gloss clear sealer
2) Exterior walls and roof shall be 2 coats of water repellent penetrating stain
followed by 1 coat of low-gloss clear acrylic anti-graffiti sealer. Separate
wall and roof colors shall be as selected by the Department from the
manufacturer's standard colors.
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2.7 TESTING
A. The following tests shall be performed on concrete used in the manufacture of the toilet
buildings and vaults. All testing shall be performed in the CXT (PCI certified)
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.
1.
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.
2.
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 5.5% +/- 1%.
3.
The compressive strength of the cylinders shall be tested to ASTM C39. Make 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.
4.
A copy of all test reports shall be provided to the Department as soon as 28-day test
results are available.
PART 3 EXECUTION
3.1 EXAMINATION
A. Verify that excavation and base material meets building manufacturer's requirements.
B. Verify that planned delivery route meets building manufacturer's requirements including
width, height, and weight restrictions.
C. Verify location for crane setup meets building manufacturer's and crane operator's
requirements.
3.2 INSTALLATION
A. Install building in accordance with approved manufacturer's instructions.
B. Install building level and plumb, square on top of waste vaults.
C. Vault Toilet Riser and Accessories:
1.
Silicone caulk shall be applied between toilet riser flange and concrete floor before
the toilet riser is installed.
D. Exhaust Pipe Installation:
1.
After exhaust pipe is installed, seal around pipe at top and underside of roof with
silicone caulk. Seal around pipe at top of slab shall be accomplished by using
silicone caulk.
E. Install equipment or accessories not pre-installed at the factory.
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3.3 CLEANING
A. Clean interior and exterior of building by washing, sweeping, or other methods until
free of dirt, stains, dust, and debris.
END OF SECTION
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