USACE / NAVFAC / AFCESA / NASA UFGS-03 47 13 (August 2008)
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Preparing Activity: NASA Superseding
UFGS-03 47 00.00 40 (April 2008)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2009
SECTION 03 47 13
TILT-UP CONCRETE
08/08
NOTE: This specification covers the requirements for tilt-up concrete wall
panels precast on a previously prepared casting bed, usually the floor slab,
and erection with a crane by tilting to a near vertical position, lifting free
of the floor, and placing in final location.
This section includes various materials such as release agents, lifting and
bracing inserts, cast-in accessories, special finishes, and installation as
related to tilt-up construction. This section also includes form liners, placing
concrete, tolerances, and erection and cleanup of panels.
This section does not include concrete materials common to all concrete work
such as cements, aggregates, and lime.
Drawings must illustrate a complete design, indicating sizes of panels, reinforcing,
locations of lifting inserts, connections details, and relative location of
various structural members to which panels are connected, with sufficient dimensions
to convey adequately the quantity and nature of the required work. Drawings
must indicate whether the interior or exterior surface is cast face up.
Bolted and welded joints and connections must be indicated when these connections
are required to resist applied loads.
Architectural concrete wall panels must be indicated.
Formwork, reinforcing steel, and concrete are specified in Section 03 30 50
MISCELLANEOUS CAST-IN-PLACE CONCRETE.
Edit this guide specification for project specific requirements by adding, deleting,
or revising text. For bracketed items, choose applicable items(s) or insert
appropriate information.
Remove information and requirements not required in respective project, whether
or not brackets are present.
Comments and suggestions on this guide specification are welcome and should
be directed to the technical proponent of the specification. A listing of technical
proponents, including their organization designation and telephone number, is
on the Internet.
Recommended changes to a UFGS should be submitted as a Criteria Change Request
(CCR).
PART 1 GENERAL
1.1 REFERENCES
NOTE: This paragraph is used to list the publications cited in the text of
the guide specification. The publications are referred to in the text by basic
designation only and listed in this paragraph by organization, designation,
date, and title.
Use the Reference Wizard's Check Reference feature when you add a RID outside
of the Section's Reference Article to automatically place the reference in the
Reference Article. Also use the Reference Wizard's Check Reference feature
to update the issue dates.
References not used in the text will automatically be deleted from this section
of the project specification when you choose to reconcile references in the
publish print process.
The publications listed below form a part of this specification to the extent referenced. The publications are
referred to within the text by the basic designation only.
[ACI INTERNATIONAL (ACI)ACI 302.1R(2004; Errata 2006; Errata 2007) Guide for Concrete Floor and Slab ConstructionACI 551.1R(2005) Tilt-up Concrete Construction GuideACI CP-50(2007) Tilt-Up Supervisor & Technician Reference Guide][AMERICAN WELDING SOCIETY (AWS)AWS D1.1/D1.1M(2008) Structural Welding Code - Steel][ASTM INTERNATIONAL (ASTM)ASTM C 494/C 494M(2008a) Standard Specification for Chemical Admixtures for Concrete]1.2 SUBMITTALS
NOTE: Review Submittal Description (SD) definitions in Section 01 33 00 SUBMITTAL
PROCEDURES and edit the following list to reflect only the submittals required
for the project. Submittals should be kept to the minimum required for adequate
quality control.
A “G” following a submittal item indicates that the submittal requires Government
approval. Some submittals are already marked with a “G”. Only delete an existing
“G” if the submittal item is not complex and can be reviewed through the Contractor’s
Quality Control system. Only add a “G” if the submittal is sufficiently important
or complex in context of the project.
For submittals requiring Government approval on Army projects, a code of up
to three characters within the submittal tags may be used following the "G"
designation to indicate the approving authority. Codes for Army projects using
the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO"
for District Office (Engineering Division or other organization in the District
Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project
Office. Codes following the "G" typically are not used for Navy, Air Force,
and NASA projects.
Choose the first bracketed item for Navy, Air Force and NASA projects, or choose
the second bracketed item for Army projects.
Government approval is required for submittals with a "G" designation; submittals not having a "G" designation
are [for Contractor Quality Control approval.][for information only. When used, a designation following the
"G" designation identifies the office that will review the submittal for the Government.] Submit the following
in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:
SD-02 Shop Drawings
Submit Fabrication Drawings in accordance to specifications, with reference to contract drawings.
Show connection details, reinforcing details, and lifting devices on the installation drawings,
used for the following items:
Panels
Reinforcement and Embedded Items
SD-04 Samples
Provide samples for the following in accordance with paragraph entitled, "Preparation," of this
section.
Concrete Panel
Exposed Aggregate
SD-07 Certificates
Provide certificates for the following items showing conformance with referenced standards contained
in this section.
Facing Aggregate
Concrete Aggregates
Chemical Admixtures
Release Agent
Show reinforcement steel conformance with referenced standards, in accordance with paragraph
entitled, "Cast-In Accessories," of this section.
Pick-Up Inserts
Bracing Inserts
Reglets
1.3 QUALITY ASSURANCE
1.3.1 Erector Qualifications
Provide an experienced supervisor for panel construction and erection having at least [2] [_____] years of successful
experience in tilt-up construction, similar to the size and amount required for this project. Personnel working
pursuant to this section, may at the Contracting Officer's option, be required to demonstrate technical competence
by performing sample work [and/or by displaying their state qualifications/certificates], at no additional cost
to the Government.
1.3.2 Tolerances
Apply the following tolerances to this work:
NOTE: Tolerances may need to be changed depending on location of work.
Dimensional tolerances: Plus or minus 3.2 millimeter 1/8 inch in length and height, 4.8 millimeter 3/16
inch across diagonals
Bowing or warpage tolerance: Plus or minus 12.7 millimeter in 3050 millimeter 1/2 inch in 10 feet
Thickness tolerance: Plus 12.7, minus 3.2 millimeter 1/2, minus 1/8 inch
1.4 GENERAL REQUIREMENTS
Section 05 05 23 WELDING, STRUCTURAL, ACI 551.1R and ACI CP-50 apply to work specified in this section.
1.5 SHOP DRAWINGS
Include dimensions of panels and size and location of openings for concrete formwork on the Fabrication Drawings
.
PART 2 PRODUCTS
2.1 RELEASE AGENT
NOTE: Additional finishes must be specified. Resin type agents must be used
for panels to receive additional finishes.
[Use resin type release agent, containing no materials that could affect bond of subsequent finishes or natural
appearance of exposed concrete surfaces.]
[Use paraffin type release agent.]
2.2 CAST-IN ACCESSORIES
2.2.1 Pick-Up Inserts
[Furnish [double] [single] type inserts.]
[Furnish [corrosion-resistant steel] [hot-dip galvanized]inserts.]
2.2.2 Bracing Inserts
Furnish [corrosion-resistant steel] [hot-dip galvanized] inserts with a height corresponding to the thickness
of the panel.
2.2.3 Reglets
NOTE: Select either metal or polyvinylchloride reglets. If metal reglets are
required, specify either corrosion-resistance steel or hot-dip galvanized.
Minimum thickness for metal reglets is 0.38 millimeter 0.015 inch.
[Furnish [corrosion-resistant] [hot-dip galvanized-] steel, 0.48 millimeter28-gage, metal reglets with styrofoam
rigid filler.]
[Furnish extruded polyvinylchloride reglets with styrofoam rigid filler.]
2.2.4 Sleeves
NOTE: Delete paragraph heading and the following two sentences if sleeves are
specified under another section or if they are not required.
[Furnish pipe sleeves, size as indicated.]
[Furnish sheetmetal sleeves, size as indicated.]
2.2.5 Lifting Devices
Furnish hot-dipped galvanized [angle] [swivel] type lifting devices.
2.3 FACING AGGREGATE
NOTE: Delete paragraph heading and the following eight sentences when facing
aggregates are not required. Select applicable option(s).
Use [gravel][limestone][quartz][marble][granite][glass][ceramic] aggregate.
Match color and gradation appearance of facing aggregates of panels to the accepted sample panel.
2.4 WATER ABSORPTION
NOTE: Maximum absorption is 2 percent but must not be less than the percentage
obtained by testing the facing aggregates in the sample panel.
Water absorption of facing aggregates must be not less than the percentage obtained by testing the facing aggregates
in the approved sample panel.
2.5 CONCRETE AGGREGATES
Conform to Section 03 30 53 MISCELLANEOUS CAST-IN-PLACE CONCRETE for concrete aggregates, except that coarse
aggregate ranges from 31.5 to 9.5 millimeter 1-1/4 to 3/8 inch in size.
2.6 CHEMICAL ADMIXTURES
NOTE: Specify admixtures when they are not included under cast-in-place concrete.
[Conform to ASTM C 494/C 494M, Type B for retarder.]
[Conform to ASTM C 494/C 494M, Type C for accelerator.]
2.7 FORM LINERS
NOTE: Delete the paragraph heading and the following eight sentences when form
liners are not required. If required, select type of liner from list below.
Furnish [rubber matting][wood board][plywood panel][nailed-on inserts][fiberglass][plastic sheets][pattern as
shown on drawings] form liners.
PART 3 EXECUTION
3.1 PREPARATION
[Cast a 1200 by 1200 millimeter 4 by 4 foot sample Concrete Panel on a casting slab to demonstrate releasing
ability of release agent and architectural effects. Also provide three test panels, 300 by 300 millimeter 12
by 12 inches of Exposed Aggregate.]
Clean forms and the casting slab of extraneous materials. Locate the casting area for the panel in an area were
floor joints are preferably avoided or at least minimize the impact to the panel being casted. Spackle and/or
caulk floor joints and temporarily patch floor openings that occur in the casting area.
NOTE: Editor must specify and/or verify at the time of submittal review that
the releasing agent is compatible with the final finish, such as sealants, paints,
etc.
Treat casting slab with a Release Agent before placing reinforcing and embedded items. Use care not to scuff
the release agent when placing reinforcing and embedded items.
Retreat scuffed areas with the release agent, using care not to coat reinforcing and embedded items.Repair holes
and spalling within the slab surface from previous cast and allow to cure before applying a new coat of releasing
agent.
NOTE: Editor must include concrete requirements for tilt-up panels within
3 30 00 CAST-IN-PLACE CONCRETE and 03 30 53 CAST-IN-PLACE CONCRETE. These may
include joint locations, Slab thickness, Levelness, imbed locations, etc.
Field verify and correct any errors in the footings and foundations such as levelness, imbed locations, etc.
prior to lifting. Refer to 03 33 00 CAST-IN-PLACE ARCHITECTURAL CONCRETE for additional requirements.
3.2 REINFORCEMENT AND EMBEDDED ITEMS
Accurately locate reinforcing and items to be embedded in the panels in accordance with approved drawings and
placed into forms.
NOTE: Delete the following paragraph when the supporting members are not poured-in-place
columns.
Extend horizontal reinforcing rods at sides of panels a minimum of 300 millimeter 12 inches into column forms.
3.3 CASTING
NOTE: When structurally possible the panel thickness should be equal to nominal
thickness of wood members to increase installation and cost efficacy.
Cast Panels individually on a temporary casting slab or on the concrete floor slab of the building at the Contractor's
option. Refer to section 03 30 53 MISCELLANEOUS CAST-IN-PLACE CONCRETE and comply with ACI 302.1R. Vibrate
concrete to produce the maximum density without voids throughout the entire panel thickness. Care must be taken
not to displace reinforcement or inserts or to score forms, liners, or the casting slab.
[Install [_____] millimeter inch cant strip along edges of formwork.]
[Install strong backs at locations were panel legs are less then [_____] millimeter inches in width.]
Furnish plastic chairs for placement of reinforcing. If steel chairs must be used then they are to be plastic
tipped.
3.4 FINISHES
Finish exposed face surfaces of panels to match the approved sample panel.
NOTE: Select finish required for inside surface of panels.
Unexposed panel backs usually have a smooth float finish or a broom finish.
When the inside surfaces are exposed, the panels can receive a smooth steel-trowel
finish or light broom finish.
Furnish exposed panels with a [smooth trowel] [light broom] [exposed aggregate] [[brick][stone] pattern]finish.
Furnish and install architectural accents and reveals per construction drawings.
Furnish unexposed panel backs with a [smooth float] [broom] finish.
Cracks, voids, protrusions, spalls, or nonuniform color or texture are not acceptable. Patch and repair minor
defects from casting to match adjacent final finish.
3.5 CURING
After casting, form-cure panels until sufficient strength has developed to permit handling the units without
damage.
NOTE: The number of days for moisture curing may be changed to meet project
requirements.
After removal of forms, moist-cured panels for a minimum of 6 calendar days.
3.6 FIELD QUALITY CONTROL
NOTE: Specify higher-strength concrete if required.
Do not start erection of panels until representative concrete test cylinders have a minimum compressive strength
as specified on the drawings.
Locate pickup points in concrete panels so that concrete tensile stresses during erection do not exceed 10 percent
of the cylinder compressive strength at time of erection.
3.7 ERECTION
Level setting bed for wall panels using high-strength mortar so that the panel in place will have a level tolerance
within 1 to 500.
Erect panels using spreader bars, chockers with equalizer sheaves, adjustable bracing, and other erecting accessories
required to place panels in location. Bracing equipment must meet applicable codes.
Tilt panels from the casting platform to slope within 1 horizontal to 6 vertical.
Plumb initial setting of panels within 75 millimeter 3 inches of true.
Plumb final setting of panels with adjustable braces to vertical tolerance of 1 to 500, leaving braces in place
until panels are secured in their final location as indicated.
NOTE: Panels may be connected to steel columns, precast concrete columns, or
cast-in-place concrete columns. Details of connecting panels to supporting
structures must be indicated. Delete paragraphs not applicable.
Bolt panels to the supporting structure with High-strength bolts as specified in Section 05 12 00 STRUCTURAL
STEEL.
Weld panels to the supporting structure.
NOTE: Include all the following paragraphs for welded panels.
Welding must meet the requirements of AWS D1.1/D1.1M.
Before welding, clean surfaces of loose scale, slag, rust, grease, and other foreign substances that could affect
the strength of the welds.
Weld connections with weld materials that correspond to the steel being welded.
Use and maintain shielded metal arc welding.
Provide inspection gages for checking the size, length, and quality of welds.
Correct or replace welds having cracks, surface porosity, slag accumulation, insufficient throat, or concavity.
Remove weld splatter from steel surfaces to be painted.
Brace panels with adjustable turnbuckle pipe braces or timber braces.
NOTE: Select either plastic or portland mortar. Portland mortar (dry-packing)
is recommended for tighter joints.
Pack joints between wall panels and foundation and wall panels and columns with [portland cement] [plastic] mortar.
3.8 PATCHING
Dry -pack holes in panels left after lifting rigging has been removed with nonshrink mortar to match adjacent
surfaces.
NOTE: Select one of the following paragraphs.
Specify sack-rubbed cleaning when surface air pockets and minor rust stains
occur.
Specify acid-cleaning solution when stains are caused by rust from reinforcing
and impurities in curing water.
[Wet stained surfaces, coat surfaces with a thick mortar mixture, and rub the area with burlap pads to remove
the excess mortar and fill surface voids.]
[Remove surface stains with diluted muriatic acid, scrubbing with stiff brushes and flushing with clean water.]