1. PART GENERAL

1.1. GENERAL REQUIREMENTS

1.1.1. Conform to Division 01, General Requirements

1.2. DESCRIPTION

1.2.1. Work Included
a. Site cast Tilt-Up concrete panels.
b. Site cast Tilt-Up concrete units other than panels.
c. The Project Architect/Engineer has not been retained to design the wall panels to resist the stresses caused by erection of the wall panels, nor to determine the means and methods to be used for erection and bracing until permanent bracing is in place.
d. It shall be the Contractor’s responsibility to erect the panel in a manner that will be both safe
for personnel and property, and to brace and otherwise protect the panels against wind and
other forces that may occur during construction and until connections to the permanent
structural system are completed.
e. It shall be the Contractor’s responsibility to ensure that a suitable slab has been prepared to
provide for the level of finish that has been established within this specification.
f. It shall be the Contractor’s responsibility to coordinate the slab finishing including saw cutting
of all joints with the panel forming to minimize the impact to the architectural finish of the
panels.

1.3. RELATED SECTIONS

a. Section 03100 – Concrete Formwork: Formwork Requirements.
b. Section 03200 – Reinforcing Steel:
c. Section 03300 – Cast-in-Place Concrete:
d. Section 05500 – Miscellaneous Metals.
e. Section 07900 – Sealants and Caulking
f. Section 09900 – Painting: Finishing of Panels.

1.5. SUBMITTALS

1.5.1. Submit under provisions of Section 01300.
1.5.2. Shop Drawings: Submit Panel Shop Drawings and Erection Drawings detailing all work of
this section including temporary bracing. Reinforcing bars shown on the project drawings do
not allow for lifting and erection stresses.
1.5.3. Quality Control Submittals:
a. Test Reports: When, and as directed by the Contract Documents, submit certified laboratory
test reports confirming physical characteristics of materials used in the performance of the
Work of this Section.
b. Manufacturer’s Instructions: For manufactured items used, submit the manufacturer’s current
recommended methods of installation, including relevant limitations and safety precautions.
1.5.4. Material Submittals:
a. Concrete mix designs for each mix specified.
b. Sample of Interior and/or Exterior Surface Treatment.
c. Manufacturer’s literature for bondbreakers.
d. Mix design for structural grout for panel support.

1.6. QUALITY ASSURANCE

1.6.1. Regulatory Requirements: Comply with applicable codes and regulations of governmental
agencies having jurisdiction. Where those requirements conflict with this Specification,
comply with the more stringent provisions.
1.6.2. Qualifications for Field Personnel: Contractor shall show evidence of competence in site cast
tilt-up concrete construction. Workers shall be proficient in production and erection
operations and shall be under the direct supervision of qualified personnel. Provide
certification that supervisor to be employed in the Work has been ACI certified through the
Tilt-Up Supervisor Certification Program.
1.6.3. Qualifications for Welding: Qualify welding processes and welding operators in accordance
with CSA W59. Provide certification that welders to be employed in the Work have
satisfactorily passed AWS qualification tests within the previous 12 months.
1.6.4. Job Mock-up Panel for Architectural Finishes
a. Prepare minimum 3-feet by 3-feet panel using forming system and construction methods to
be used on project. Prepare one panel for each level of finish shown on the drawings.
b. Incorporate edge and reveal conditions as detailed on the project drawings.
c. Painted and Textured Concrete Finishes
1. Utilize full range of color as specified
2. Utilize full range of textures variation as specified.
d. Sandblast or Colored Concrete Finishes
1. Utilize full range size and colors in aggregate.
2. Utilize full range of color in grout.
3. If sand blasting is specified, it shall match degree specified.
e. Architectural Liner or Cast-In Brick Finishes
1. Utilize full range of color sampling for brick specified.
2. If liners are to be used, sample shall consist of section showing integration of both
horizontal and vertical liner joints.
f. Maintain approved mock-up for comparison with finish work.
g. Dispose of mock-up when project is completed or when directed by Project
Architect/Engineer.
h. Cast mock-up over slab joint or column joint if actual panels will be affected by these
conditions.

1.7. TOLERANCES

1.7.1. Dimensions of the finished panels, at the time of erection in the structure, shall conform to the
casting tolerances stated below unless otherwise specified or approved by the Project
Architect/Engineer.
a. Height & Width of Basic Panel
1. Up to 20 feet 1/4 inch
2. 20 feet to 30 feet 3/8 inch
3. Each additional 10-foot increment
in excess of 30 feet 1/8 inch
b. Note: Tolerances referenced here may be further restricted by joint width tolerances listed in
section 1.5.2a.
c. Thickness 3/16 inch
d. Note: The tolerance listed is for the average variation of panel thickness through any
horizontal or vertical cross-section of the panel.
e. Skew of Panel or Opening
1. Per 6 feet of dimension 1/8 inch
2. Maximum difference 1/2 inch
f. Note: The tolerance listed is the measured difference in length of the two diagonals.
g. Openings Cast Into Panel
1. Size of Opening 1/4 inch
2. Location of Centerline of Opening 1/4 inch
h. Location/Placement of Embedded Items
1. Inserts, Bolts, Pipe Sleeves 3/8 inch
2. Lifting and Bracing Inserts Per Manufacturer’s Specs
3. Weld Plate Embeds (Lateral Placement) 1 inch
4. Weld Plate Embeds (Tipping & Flushness) 1/4 inch
i. Deviation of Concrete Reinforcing Steel Cover: Shall be in accordance with ACI 318 and in
no case less than specified elsewhere.
1.7.2. Dimensions of the erected panels shall conform to the erection tolerances stated below
unless otherwise specified or approved by the Project Architect/Engineer.
a. Joint Width Variation
1. Panels up to 20 feet tall 1/4 inch
2. For Each 10-foot Increment in Excess
of 20 feet Tall 1/8 inch
3. In no case should the variation in joint width be increased or decreased more than
50% from the specified joint width.
b. Note: The tolerance listed is measured between the panels at the exterior face of the panels
at the joint.
c. Joint Taper
1. Panels up to 20 feet tall 1/4 inch
2. For Each 10-foot Increment in Excess
of 20 feet Tall 1/8 inch
3. Maximum for Entire Length 3/8 inch
d. Note: The tolerance listed is the measured difference in joint width indicating the panel
edges are not parallel.
e. Panel Alignment
1. Alignment of Horizontal and Vertical Joints 1/4 inch
2. Offset in Exterior Face of Adjacent Panels 1/4 inch

1.8. PROJECT CONDITIONS

1.8.1. Do not construct formwork, place reinforcing steel or concrete, or erect panels during adverse
weather unless approved measures are taken to prevent damage. During period of dry
winds, low humidity and other conditions causing rapid drying, protect fresh concrete with an
evaporation retardant (monomolecular film) or fine fog spray of water applied immediately
after screeding and bull floating. Maintain protection until final finishing and curing
compounds are applied.

1.8.2. For cold weather conditions, adequate equipment shall be provided for heating concrete
materials and protecting concrete during freezing or near-freezing weather. Concrete
materials and reinforcing steel, forms, fillers and ground with which concrete is to come in
contact shall be free from frost. If shelters are used, the type of fuel used for heating shall not
weaken the concrete surface. Frozen materials or materials containing ice shall not be used.
Also refer to CSA A23.1 – Specification for Cold Weather Concreting.

1.8.3. For hot weather conditions proper attention shall be given to concrete materials, production
methods, handling, placing, protection and curing to prevent excessive concrete
temperatures or water evaporation that may increase shrinkage and impair required strength
or serviceability of the member or structure. Also refer to CSA A23.1 – Specification for Hot
Weather Concreting.

2. PRODUCTS

2.1. MANUFACTURED ITEMS

2.1.1. Lifting hardware, inserts, braces, and related embedded and attached items shall be
manufactured specifically for site cast tilt-up construction.

2.2. PANEL MATERIALS

2.2.1. Forms:
a. Forms shall contain blockouts required to provide openings detailed on Drawings. Coordinate
all openings with other trades.
b. Panel boundary forms shall be rigidly constructed and well braced steel or wood forms,
straight and with precise corners. Design to withstand stresses resulting from the casting
process. Consideration should be given to exposed formed surfaces. All forming surfaces
shall be smooth and clean prior to pouring of concrete.
c. Panels may be stacked for ease of casting, in forms as specified above.
d. When panels are stack cast, maintain a continuous sound and smooth surface with forming
and plaster at all openings.
e. Bondbreaker must be compatible with curing compound and other finishes, including paint,
and floor finish.
2.2.2. Reveal Materials: All material used for creating reveals or relief in the exterior face of the
panel must be of adequate strength to withstand construction traffic/loads without damage.
2.2.3. Concrete Materials:
a. Cement: Portland cement, conforming to CAN/CSA-A5
b. Fine and coarse aggregates shall consist of clean, hard strong, and durable inert material,
free of injurious amounts of deleterious substances, conforming to CSA A23.1
c. Concrete shall be a design mix approved by Project Architect/Engineer.
d. Mixing water shall be free of any acid, alkali, oil or organic material that may interfere with the
setting of the cement.
e. Admixtures shall be approved by Project Architect/Engineer.
f. All concrete shall be produced and delivered in accordance with CSA A23.1
2.2.4. Quality of Concrete
a. Ready-mixed concrete shall conform to CSA A23.1
b. Concrete shall have a minimum compressive strength at 28 days as indicated on the project
drawings and as required for panel erection
2.2.5. Steel Reinforcement:
a. Reinforcing bars shall conform to SCA G30.1
b. Welded wire reinforcement shall conform to CSA G30.5 and shall be of the style shown on the project drawings. Welded wire reinforcement shall be supplied in flat sheets.
2.2.6. Miscellaneous Metals:
a. Conform to requirements of Section 05500 – Metal Fabrications.
b. Provide all inserts, dowels, and other items to be cast in panels, including items required for
erection and bracing.
c. Steel that will be exposed to the exterior or damp environments in finished panels shall be
plastic-tipped, hot-dipped galvanized or protected by other means to prevent corrosion or
oxidation of the metal after fabrication
1. Selection of plastic-tipped treatments: Ensure that the plastic will not create stress
concentrations within the thin sections of concrete when located near a surface from
differential thermal expansion and contraction ultimately resulting in local shear failure
of the concrete surface producing surface blemishes.
2.2.7. Supports for Reinforcing Steel:
a. Supports may consist of metal, all-plastic and concrete materials.
b. Metal supports shall be either galvanized after fabrication or plastic-tipped. No galvanized or
plastic tip metal support shall be used on panels to receive exposed or sandblasted finish.
c. All-plastic supports should be of such design as to adequately support reinforcement, provide
minimal surface contact and be of such coloring as to not be distinguishable on any surfaces.
Minimal surface contact is defined as having a total contact surface area not to exceed 0.10
square inches (64.5 mm²) per contact point. Refer to CRSI Manual of Standard Practice.
d. Concrete supports may only be used in situations where surface contact is not visible.

2.3. CONCRETE CURING MATERIALS

2.3.1. Liquid Membrane-Forming Curing Compound:
a. Liquid-type membrane-forming curing compound complying with ASTM C309-98a, Type I
and I D, Class B.
b. It is preferred that the curing compound/bondbreaker be the same product or compatible, and
that only one manufacturer’s product is used.
c. Concrete Curing of Casting Beds: All concrete in and around those areas to be used for
casting shall be cured after finishing and as soon as the free water on the surface has
disappeared and no water sheen is visible, but not so late that the liquid curing compound will
be absorbed into the concrete. The cure and/or bondbreaking compound should be applied
at the manufacturer’s recommended coverage to achieve minimum moisture loss.

2.4. SANDWICH INSULATION SYSTEMS

2.4.1. The insulated concrete sandwich panels must be constructed to maintain the effective
acceptable material R- 20 of the panels with less than one (1) percent reduction due to
penetrations and connection detailing.

2.5. SEALANT AND CAULKING MATERIALS

2.5.1. Sealants: In accordance with Section 07920 – Sealants and Caulking.

2.6. BONDBREAKER

2.6.1. Liquid Dissipating Membrane-Forming Curing Compound.
a. The bondbreaking material shall also be a dissipating membrane forming material complying
with ASTM C 309-98a, Type I and I D, Class B.
b. The bondbreaking compound shall be applied with adequate time to dry prior to placement of
reinforcing steel.
c. The bondbreaking compound shall dry in 30-minutes or less at 100°F to reduce panel clean
up.
d. Material must be compatible with curing material.
e. The bondbreaker used must be compatible with any coating specified for interior or exterior
concrete panels and slab.
2.6.2. Refer to manufacturer’s instructions as to proper procedures for post applying a liquid floor
hardener or sealant to areas where bondbreaker is present.

3. EXECUTION

3.1. GENERAL

3.1.1. Coordinate site cast tilt-up operations with Work of other trades in order that Work may be
expedited and omissions and delays avoided.
3.1.2. Concrete shall be so handled as to prevent segregation. Mixers, chutes, conveyors, pump
hoses, and other handling equipment shall be kept clean and free of foreign matter.

3.2. CASTING SURFACES

3.2.1. The information contained in this section consists of general recommendations for the design
and construction of the Casting Slab.
3.2.2. Casting Slab Preparation:
a. Casting slab shall be cured. Saw cuts, cracks, joints or defects in the casting bed shall be
filled so as to minimize transfer of the joint line to the panel face.
b. Waste slabs, if used, shall be of sufficient thickness and strength so as not to crack with the
weight of the panels.
c. Contractor shall be responsible for compatibility of curing agents, sealants, and releasing
agents utilized in the Work. If panels are to be stacked, the troweled surface shall be
considered the casting bed and shall be treated as the same.
d. Isolation pockets shall be formed in such a manner as to minimize the transfer of the pocket
to the finished appearance of the panel.
3.2.3. Bondbreaker to be applied in accordance with manufacturer’s printed instructions for the
applicable condition.
3.2.4. After placing reinforcing steel for panels, check casting slab surfaces for continuity of film.
Touch-up or recoat worn or damaged areas, taking care to prevent application of coating on
reinforcing steel and inserts.
3.2.5. Coordinate installation of inserts and anchorages required to be set into concrete slabs prior
to casting of panels.
3.2.6. Where reveals are specified in panels, assure that forming strips are straight and securely
fastened to prevent movement or floating during placing operations and that alignment
between adjacent panels is correct. Reveal tolerances shall comply with the provisions of
Section 3.7 of this document.

3.3. FORMING PANELS

3.3.1. The Contractor shall layout the panels for casting in a manner that minimizes the locations of
floor joints, column isolation joints and other construction joints in the panel faces. The
Contractor shall prevent the layout of the panels over temporarily poured casting surfaces
such as pre-formed columns and pits unless deemed absolutely necessary.
3.3.2. Forms shall be designed to maintain the perimeter of the panel as shown on the project
drawings within 1/4-inch maximum deflection during pouring.
3.3.3. All formed blockouts for openings in the panels shall be designed to limit the deflection during
pouring to a maximum of 1/8 inch.

3.4. PLACING CONCRETE

3.4.1. Concrete shall be thoroughly worked around reinforcement, around the embedded items, and
into corners of the forms.
3.4.2. Cold joints shall not be permitted in an individual site cast tilt-up panel.

3.5. CURING AND PROTECTIONS

3.5.1. Protect freshly placed concrete from premature drying and excessive cold or hot
temperatures, and maintain without drying at a relatively constant temperature for the period
of time necessary for hydration of the cement and proper hardening of the concrete.
3.5.2. Apply liquid membrane curing compound in accordance with manufacturer’s
recommendations.
3.5.3. Underlying panels in a stack cast arrangement shall be cured in the same manner as casting
beds.

3.6. HANDLING AND ERECTION OF PANELS

3.6.1. Design panels for erection stresses and selection of lifting system and hardware shall be by
the Contractor.
3.6.2. Minimum strength of panels at time of erection shall be in accordance with the lifting design.
3.6.3. It is recommended that the Contractor take extra test specimens and field cure to verify
concrete strength of panels.
3.6.4. Before starting erection operations, Contractor shall check relevant job site conditions insofar
as they are ready for the erection of panels. Each element shall be properly marked to
correspond with the designation indicated on the approved Shop Drawings.
3.6.5. Protect elements to prevent staining, warping or cracking.
3.6.6. Patch or repair defects in panels in a manner acceptable to the Project Architect/Engineer.
3.6.7. Use erection equipment that will prevent damage to existing construction, permanent floor
slabs and panels. Damage to Work shall be repaired or replaced at the Contractor’s expense
and in a manner acceptable to the Project Architect/Engineer prior to painting or coating.
3.6.8. Set panels in the position assigned. Place panels evenly on prepared setting pads or proper capacity shims. Grout space under panels for full bearing or provide additional support until
grouting takes place.
3.6.9. Panels not attached to the building frame at the time of erection shall be braced in position
using a bracing system designed to resist wind and other loads that may reasonably be
determined until all structural connections have been made. There shall be a minimum of
two braces per panel. Design of bracing shall be the responsibility of the Contractor. Panel
bracing connection shall be maintained daily by Contractor to assure tightness.
3.6.10. After panels are erected, Contractor shall check all connecting bolts at the floor and panels
daily to ensure tightness.
3.6.11. Dry-pack grout installation and preparation for weld pockets and other panel block outs not
cast in during pouring shall be performed as follows:
a. Remove laitance down to sound concrete
b. Surface to receive grout shall be rough and reasonably level
c. Surface shall have been properly wet cured
d. Do not use curing compounds
e. Clean surface of oil, grease, dirt and loose particles.
f. Remove free water from concrete and bolt holes immediately before grouting.
3.6.12. Protection of the erected elements shall be the responsibility of the Contractor.
3.6.13. Temporary panel bracing shall not be removed until roof diaphragm is completely welded and
installed.
3.6.14. After the panels are erected, dismantle panel erection devices and patch panels as required
for a uniform appearance.
3.6.15. After panels are erected, patch holes or other blemishes in casting slab that were caused by
the panel casting and erection processes in a manner acceptable to the Project
Architect/Engineer.

3.7. PANEL FINISH

3.7.1. Exposed surfaces of panels shall be finished as indicated on the project drawings. This shall
include both the front and back of the panels as well as any exposed edges as defined below.
3.7.2. Visible surfaces of the panels, when in place shall be free from surface defects for as defined
below for a __Grade A Smooth___ finish. Refer to Section 1.4 (D) of this document for
sample finish requirements.
a. Grade A – Architectural: Projects designed for the circulation of people within a distance of
10 feet to 25 feet
1. All panel surfaces will be free of all voids, holes, pockets and other surface
deformations greater than 1/8 inch
2. Surfaces of panels must not project reinforcing patterns, floor joints or other
projections or voids from the casting surface.
3. Cracks are not permissible in excess of 1/32 inch
4. All surface repairs must be performed in such a way as to prevent the projection of
repair strokes through the intended finish.
5. All holes shall be filled with patching material to present a smooth surface ready for
painting unless the designed finish is to result in exposed aggregates whereby the
patching material shall match the intended color and texture.
6. Reveals must be maintained in their designed positions. Deviation from any
horizontal or vertical line shall not exceed 1/8 inch over 10 feet
b. Grade B – Standard: Projects designed for the circulation of people within a distance greater
than 25 feet while retaining an emphasis on quality finishes and aesthetic detail.
1. All panel surfaces will be free of all voids, holes, pockets and other surface
deformations greater than 1/4 inch
2. Surfaces of panels may be repaired sufficiently to prevent excessive projection of
blemishes through intended finish.
3. Cracks are permissible as naturally resulting from curing. Cracks are not permissible
as caused by erection forces.
4. Surface repairs shall improve the appearance of the panels within the descriptions
above provided they do not result in additional blemishes that are visible within the
distance set.
5. All holes shall be filled with patching material to present a smooth surface ready for
painting unless the designed finish is to result in exposed aggregates whereby the
patching material shall match the intended color and texture.
6. Reveals must be maintained in their designed positions. Deviations greater than 1/4
inch from any location will not be permissible.
c. Grade C – Utility: Projects designed for remote areas with little or no public
interaction and/or projects designed specifically for interior use with little or no
emphasis towards the exterior design.
1. The Contractor shall consult with the Project Architect/Engineer and the Owner prior
to initiating the project to determine the expectations for the project appearance.
2. Panel surfaces showing voids, holes, pockets and other surface deformations are
permissible provided they do not weaken the structural integrity of the panel or the
finish of the panel and provided they do not exceed 1/2 inch
3. Cracked surfaces are permissible provided the cracks are not resulting from
structural weakness or failure and provided they do not present the potential for
failure of the finish over the life of the building.
3.7.3. Surfaces to be painted shall be prepared to receive paint finish as specified in Section
09900.

3.8. SEALING OF PANEL JOINTS

3.8.1. Clean the panel joints of contaminants, including form release agents and concrete
laitance. Dust and loose particles shall be blown out or otherwise cleaned to provide
proper bond. Apply sealants in accordance with manufacturer’s recommendations.
3.8.2. Install joint insulation where indicated to consist of a limited expansion polyurethane
insulation or an approved equal as provided in accordance with Section 07200 –
Insulation.
3.8.3. Install back-up rod, primer, paint and sealant in accordance with Section 07920 – Sealants
and Caulking.

3.9. FIELD QUALITY CONTROL

3.9.1. Testing:
a. Take not less than 4 cylinders for each class of concrete, for each 100 cubic meters or fraction thereof, for each day concrete is cast, or not less than once for each 5,000 sq.ft. (464.5 sq.m.) of panel area. The specimens shall be field cured.
b. Of each set of 4 cylinders, two shall be tested at 7 days and two at 28 days.
c. Casting and curing of test cylinders shall be in accordance with ASTM C31.
d. Test cylinders and test reports shall accurately indicate in which panel, by number and
concrete delivery tag, the concrete represented by each test cylinder was place.
e. Copies of test reports shall be distributed to Owner, Project Architect/Engineer, Building
Official and Contractor. Reports shall indicate location of tests, dates, technician, and
other pertinent information.
3.9.2. Deficient Compressive Strength
a. In the event that concrete tests indicate a 7-day or 28-day strength below that which was
specified, the Contractor with the agreement of the Project Architect/Engineer shall have
the mix adjusted so that subsequent concrete will comply with the minimum strength
requirements. The owner may require core specimens to be taken and tested, at the
Contractor’s expense. If core tests fall below minimum requirements, as determined by
the Project Architect/Engineer, the concrete in place will be deemed to be defective. This
concrete shall be removed and replaced or strengthened in a manner acceptable to the
Owner and Project Architect/Engineer, at the Contractor’s expense. Any demolition or
repair of other materials or systems as a result of repair or replacement of defective
concrete shall be at the Contractor’s expense.

3.10. CRACKED AND DAMAGED PANELS

3.10.1. Panel damage that occurs during erection, cracks readily visible per the requirements
specified in Section 03470.3.6.2, permanent bowing occurring from erection, and spalls,
shall be repaired or replaced to the satisfaction of the Project Architect/Engineer,
appropriate to the type and location on the building.

3.11. CLEANING

3.11.1. When Work of this Section has been completed, remove trash, debris, surplus materials,
tools and equipment from site.

3.12. PROTECTION

3.12.1. During the period after this Work has been completed, the General Contractor shall protect
site cast tilt-up concrete finished concrete surfaces from damage by subsequent
construction operations.

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