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ACI Tilt-Up Supervisor study materials
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ACI Tilt-Up Supervisor practice questions

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Question 1Tilt-Up Planning, Site Preparation, and Layout

On a tilt-up project, the primary purpose of the pre-pour layout survey is to establish which of the following?

  1. The crane's hourly operating cost
  2. The concrete supplier's delivery sequence for the day
  3. The exact plan position and elevation of each panel before casting Correct answer.
  4. The final paint color schedule for the panels

Explanation

Layout survey fixes the horizontal and vertical position of every panel so that cast-in items, joints, and later erection align with the design. Delivery sequencing, crane costs, and finishes are unrelated to the survey's purpose.

Question 2Tilt-Up Planning, Site Preparation, and Layout

Which document most directly governs the required tolerances for panel layout on a tilt-up job?

  1. The concrete batch ticket
  2. The site safety orientation checklist
  3. The project specifications and approved shop drawings Correct answer.
  4. The crane load chart

Explanation

Tolerances for panel location come from the project specifications and the approved panel shop drawings, which translate design intent into field dimensions. Batch tickets, load charts, and safety checklists do not define layout tolerance.

Question 3Tilt-Up Planning, Site Preparation, and Layout

Before casting panels, why must the casting bed or slab-on-ground be evaluated for flatness and levelness?

  1. To verify the rebar lap splice length
  2. To determine the concrete's air content
  3. To confirm the finished panel face will meet the specified FF/FL tolerances Correct answer.
  4. To set the crane's pick radius

Explanation

The casting surface transfers its profile to the panel face, so its flatness and levelness directly control the finished panel's FF/FL results. Air content, pick radius, and splice length are governed by other means.

Question 4Tilt-Up Planning, Site Preparation, and Layout

A tilt-up panel is to be cast on an existing slab-on-ground. Which measure best protects the finished floor slab beneath the panel?

  1. Increasing the panel's concrete strength
  2. Reducing the panel's thickness at the base
  3. Adding extra lift inserts to the panel
  4. Applying a bond-breaker and a protective casting surface Correct answer.

Explanation

A bond-breaker plus a sacrificial casting surface prevents the panel from bonding to and damaging the floor slab. Strength, thickness, and insert count do not address bond to the substrate.

Question 5Tilt-Up Planning, Site Preparation, and Layout

What is the main reason for establishing a stable benchmark outside the active construction traffic area before laying out panels?

  1. To eliminate the need for panel bracing
  2. To satisfy the concrete supplier's invoicing requirements
  3. To provide a durable elevation reference that will not be disturbed Correct answer.
  4. To reduce the number of survey crew needed

Explanation

A protected benchmark preserves the elevation datum so panel and slab elevations remain consistent as work progresses. It does not affect invoicing, crew count, or bracing design.

Question 6Tilt-Up Planning, Site Preparation, and Layout

Which site condition most commonly requires adjustment to the planned crane pick positions during tilt-up planning?

  1. The number of panel lift inserts
  2. The color of the panel release agent
  3. Underground utilities or soft ground along the crane travel path Correct answer.
  4. The type of curing compound used

Explanation

Crane positions depend on ground bearing and clearance from buried utilities, so these conditions often force relocation of picks. Release agent, insert count, and curing compound do not govern crane location.

Question 7Tilt-Up Planning, Site Preparation, and Layout

During site preparation for tilt-up, what is the purpose of proof-rolling the crane and delivery routes?

  1. To measure the slump of delivered concrete
  2. To confirm the subgrade can support construction loads without excessive rutting Correct answer.
  3. To compact the concrete panels themselves
  4. To verify the panel finish schedule

Explanation

Proof-rolling reveals weak or soft spots so the subgrade can be corrected before heavy crane and delivery loads arrive. It does not compact panels, measure slump, or relate to finishes.

Question 8Tilt-Up Planning, Site Preparation, and Layout

A layout crew must transfer panel corner locations from control points to the casting surface. Which practice best preserves accuracy over a long panel line?

  1. Scaling distances directly from a reduced drawing
  2. String-lining from the nearest control point and checking against a second control point Correct answer.
  3. Stepping off dimensions with a tape from a single corner
  4. Locating corners by eye relative to formwork already placed

Explanation

Referencing control points and cross-checking with a second point controls cumulative error along long lines. Scaling, single-corner taping, and visual placement all accumulate error.

Question 9Tilt-Up Planning, Site Preparation, and Layout

When planning the casting layout, why should panels be oriented so that their finished exterior face is cast down against the bed?

  1. To shorten the concrete cure time
  2. To reduce the amount of rebar required
  3. To allow the crane to lift from the panel's center
  4. To produce a smooth architectural face against the casting surface Correct answer.

Explanation

Casting the exposed face down against a prepared surface yields the smoothest finish and best replicates formwork texture. Lifting point location, reinforcement quantity, and cure time are not reasons for face-down orientation.

Question 10Tilt-Up Planning, Site Preparation, and Layout

The site plan shows a crane working near a property line with limited outrigger clearance. What is the most appropriate planning response?

  1. Reduce panel size only after the first lift fails
  2. Assume the crane manufacturer's chart covers all conditions
  3. Proceed and adjust outriggers only if the operator objects
  4. Verify outrigger loads and matting, and confirm clearances with the crane plan before mobilizing Correct answer.

Explanation

Outrigger loads, matting, and clearances must be verified against the crane plan before mobilization to ensure stability and legal setback compliance. Assumptions and after-the-fact adjustments create safety and schedule risk.

Question 11Tilt-Up Planning, Site Preparation, and Layout

Why is a panel layout typically dimensioned from gridlines rather than from column faces in the field?

  1. Gridlines are stable references established by the structural control network Correct answer.
  2. Column faces are always plumb and square
  3. Gridlines eliminate the need for survey equipment
  4. Column faces change with each concrete pour

Explanation

Gridlines derive from the structural control network and remain consistent references as construction proceeds. Column faces can vary with construction tolerances and do not replace survey control.

Question 12Tilt-Up Planning, Site Preparation, and Layout

A tilt-up panel will be cast adjacent to an excavation. What planning check is most important before casting?

  1. Confirming the curing blankets are the correct brand
  2. Confirming the excavation support and setback provide stable ground for casting and lifting Correct answer.
  3. Confirming the panel's paint color matches the schedule
  4. Confirming the concrete truck has a radio

Explanation

Adjacent excavations can undermine the casting bed and crane stability, so support and setback must be verified. Color, radios, and blanket brands do not affect structural safety.

Question 13Tilt-Up Planning, Site Preparation, and Layout

Which item should be verified on the site plan to ensure concrete trucks can reach the casting area without interrupting crane operations?

  1. The number of panels per truck
  2. The slump of the mix
  3. The color of the safety vests
  4. A designated truck route and pour access separated from the crane swing radius Correct answer.

Explanation

Separating delivery routes from the crane swing radius keeps trucks clear of lifting operations. Panel count per truck, slump, and vest color do not address access conflicts.

Question 14Tilt-Up Planning, Site Preparation, and Layout

During layout, a discrepancy is found between the architectural and structural drawings for a panel opening. What is the correct first action?

  1. Stop and request clarification through the RFI process before casting Correct answer.
  2. Use the architectural dimension because it is listed first
  3. Proceed with the larger opening to be safe
  4. Split the difference between the two dimensions

Explanation

Conflicting dimensions must be resolved through the formal RFI process so the design team issues an authoritative direction. Averaging, arbitrary precedence, or guessing risks nonconforming work.

Question 15Tilt-Up Planning, Site Preparation, and Layout

What is the purpose of marking panel identification and lift orientation directly on the casting surface before placing reinforcement?

  1. To calculate the panel's curing time
  2. To determine the concrete's water-cement ratio
  3. To set the crane's load chart
  4. To ensure the correct panel is cast in the correct location and orientation Correct answer.

Explanation

Marking identification and orientation ties each cast location to the erection plan so panels are lifted and set as designed. Mix ratios, load charts, and cure times are determined elsewhere.

Question 16Tilt-Up Planning, Site Preparation, and Layout

A project uses a shared casting bed for multiple panel types. Which planning control prevents casting a panel in the wrong sequence?

  1. Additional curing compound
  2. A higher-strength mix
  3. A larger concrete crew
  4. A casting sequence plan coordinated with the erection schedule Correct answer.

Explanation

A casting sequence plan aligned with erection order ensures panels are produced in the order they are needed and fit the available bed. Crew size, mix strength, and curing compound do not control sequence.

Question 17Tilt-Up Planning, Site Preparation, and Layout

Why should the layout of embedded items such as lift inserts and braces be coordinated with the erection plan before casting?

  1. Inserts control the panel's cure schedule
  2. Insert and brace locations must match the rigging and bracing scheme used during lifting Correct answer.
  3. Inserts determine the concrete's air entrainment
  4. Inserts replace the need for a layout survey

Explanation

Lift inserts and brace anchors are positioned to suit the rigging geometry and temporary bracing plan, so coordination before casting prevents field conflicts. They do not govern air content, curing, or survey needs.

Question 18Tilt-Up Planning, Site Preparation, and Layout

On a site with expansive clay subgrade, what planning measure best protects the casting bed and crane pads?

  1. Moisture conditioning and stabilization designed for the subgrade conditions Correct answer.
  2. Adding more lift inserts
  3. Shortening the curing period
  4. Increasing the panel concrete slump

Explanation

Expansive soils require moisture control and stabilization to maintain stable support for casting and crane operations. Slump, insert count, and cure duration do not address subgrade volume change.

Question 19Tilt-Up Planning, Site Preparation, and Layout

A layout crew is setting panel lines on a bed that will later be used for a different panel arrangement. What practice minimizes layout error between setups?

  1. Reusing chalk lines from the previous arrangement
  2. Re-establishing control from the project benchmark for each new arrangement Correct answer.
  3. Using the previous panel's edge as the new baseline
  4. Relying on the memory of the crew lead

Explanation

Re-establishing control from the project benchmark each time prevents error from carrying over between arrangements. Reused lines, memory, and prior panel edges are not reliable references.

Question 20Tilt-Up Planning, Site Preparation, and Layout

Why is it important to verify that the casting bed extends beyond the panel footprint by a planned margin?

  1. To provide room for formwork, edge details, and safe access around the panel Correct answer.
  2. To allow the panel to be lifted without a crane
  3. To reduce the required concrete strength
  4. To eliminate the need for bond-breaker

Explanation

A margin beyond the footprint accommodates forms, edge treatments, and worker access during casting and finishing. It does not affect lifting method, strength, or bond-breaker need.

Question 21Tilt-Up Planning, Site Preparation, and Layout

A tilt-up site plan shows a crane pad located over a recently backfilled utility trench. Which action is most appropriate before casting begins?

  1. Evaluate trench backfill compaction and design a pad that distributes crane loads Correct answer.
  2. Move the crane only after a lift shows settlement
  3. Assume the backfill will consolidate under the crane
  4. Increase the panel's concrete cover

Explanation

Backfilled trenches can settle under heavy loads, so compaction must be evaluated and a load-distributing pad designed. Assumptions, reactive moves, and cover changes do not address bearing failure risk.

Question 22Tilt-Up Planning, Site Preparation, and Layout

Two control points used for panel layout are found to be out of agreement by more than the specified tolerance. What is the correct interpretation?

  1. Layout should proceed using the closer point
  2. The control network must be re-verified and corrected before layout proceeds Correct answer.
  3. The tolerance should be relaxed for this panel
  4. The average of the two points should be used

Explanation

Disagreement beyond tolerance means the control network itself is suspect and must be re-verified before any layout depends on it. Averaging, choosing one point, or relaxing tolerance propagates error.

Question 23Tilt-Up Planning, Site Preparation, and Layout

Why does the planning phase require confirming that the casting bed's elevation datum matches the building's finished floor datum?

  1. The panel color varies with elevation
  2. Panel heights and embed elevations are set relative to a single consistent datum Correct answer.
  3. The concrete supplier bills by elevation
  4. The crane's fuel use depends on elevation

Explanation

A single consistent datum ensures panel heights, embed elevations, and finished floor relationships are correct. Billing, fuel, and color are not elevation-dependent in this context.

Question 24Tilt-Up Planning, Site Preparation, and Layout

During planning, a reviewer notes that the crane swing radius overlaps a public sidewalk. Which control best manages this condition?

  1. Post a sign at the site entrance
  2. Rely on spotters to warn pedestrians during the lift
  3. Coordinate a closure or exclusion zone with the authority having jurisdiction before the lift Correct answer.
  4. Schedule lifts only during lunch breaks

Explanation

Overhead loads over public areas require formal coordination and an approved closure or exclusion zone with the authority having jurisdiction. Spotters, timing, and signage alone do not provide a legal or safe control.

Question 25Foundations, Slabs-on-Grade, and Panel Casting Beds

What is the minimum compressive strength that a typical tilt-up casting bed must reach before panels are lifted?

  1. 50 percent of the 28-day design strength
  2. The strength specified by the engineer of record for lifting Correct answer.
  3. The 7-day design strength
  4. The strength achieved at the end of the curing period

Explanation

Lifting and handling loads differ from in-service loads, so the engineer of record specifies a required strength at lift, commonly confirmed by field-cured cylinders or maturity testing. Using a fixed fraction of design strength ignores the actual lifting stresses.

Question 26Foundations, Slabs-on-Grade, and Panel Casting Beds

Why is a bond breaker applied to a tilt-up casting bed before reinforcing steel is placed?

  1. To keep the panel from bonding to the bed so it can be lifted cleanly Correct answer.
  2. To improve the finish of the panel's exposed face
  3. To prevent rust on the reinforcing steel
  4. To accelerate curing of the slab surface

Explanation

A bond breaker creates a slip plane between the panel and the bed, allowing clean separation during lifting. Without it, the panel could tear or the bed could be damaged.

Question 27Foundations, Slabs-on-Grade, and Panel Casting Beds

What is the primary reason casting beds are typically constructed on well-compacted, stable subgrade?

  1. To allow the bed to be reused without cleaning
  2. To reduce the amount of concrete needed
  3. To prevent differential settlement that would distort panels Correct answer.
  4. To improve the thermal insulation of the bed

Explanation

Differential settlement of the bed can induce cracking or dimensional error in panels cast on it. A stable, compacted subgrade keeps the bed true and flat.

Question 28Foundations, Slabs-on-Grade, and Panel Casting Beds

Which activity must be completed before formwork is set for a tilt-up panel on an existing slab-on-grade?

  1. Verification that the slab surface is clean and bond breaker is applied Correct answer.
  2. Placement of the panel concrete
  3. Installation of the panel's lifting inserts
  4. Stripping of the panel forms

Explanation

The slab must be clean and properly treated with bond breaker before forms are placed, because forms obstruct access to the casting surface. Lifting inserts and concrete come after formwork is set.

Question 29Foundations, Slabs-on-Grade, and Panel Casting Beds

What does a curing compound do when applied to a freshly cast tilt-up panel?

  1. It forms a membrane that limits moisture loss from the concrete Correct answer.
  2. It chemically reacts to increase concrete strength
  3. It seals the panel so lifting inserts can be removed
  4. It serves as a bond breaker for the next panel

Explanation

Curing compound forms a film that retards evaporation, helping the concrete cure properly. It is not a strength additive or a bond breaker.

Question 30Foundations, Slabs-on-Grade, and Panel Casting Beds

What is the purpose of a perimeter form on a tilt-up casting bed?

  1. To contain and shape the concrete to the panel's outline Correct answer.
  2. To anchor the lifting inserts
  3. To provide a walking surface for workers
  4. To support the panel during lifting

Explanation

Perimeter forms define the panel edges and hold the concrete in place during placement. Lifting inserts are anchored into the concrete, not the forms.

Question 31Foundations, Slabs-on-Grade, and Panel Casting Beds

Which of the following is a common method for verifying that the casting bed is flat and true before panel layout?

  1. Counting the number of construction joints
  2. Surveying elevations at a grid of points across the bed Correct answer.
  3. Measuring the bed's concrete thickness
  4. Checking the color of the bed surface

Explanation

Elevation surveys at a grid confirm flatness and identify high or low spots that could affect panel geometry. Surface color and joint counts do not verify flatness.

Question 32Foundations, Slabs-on-Grade, and Panel Casting Beds

A crew is casting panels directly on an existing interior slab-on-grade. Which condition most affects whether the slab can serve as a casting bed?

  1. The building's roof height
  2. The number of windows in the building
  3. The slab's flatness and structural capacity to resist construction loads Correct answer.
  4. The slab's paint color

Explanation

The slab must be flat enough to produce accurate panels and strong enough to carry panel weight and construction loads. Cosmetic and unrelated building features do not govern.

Question 33Foundations, Slabs-on-Grade, and Panel Casting Beds

Why should panel layout lines be established from a fixed control line rather than from the bed edges?

  1. Bed edges may not be square or true, so accumulating error is avoided Correct answer.
  2. Layout lines are required to be painted red
  3. Bed edges are always perfectly square
  4. Control lines eliminate the need for bond breaker

Explanation

Using a fixed control line prevents small errors at bed edges from accumulating across the layout. Bed edges are not guaranteed to be square or straight.

Question 34Foundations, Slabs-on-Grade, and Panel Casting Beds

What is the function of a shear key or embeds placed at panel joints in a tilt-up wall system?

  1. To provide a curing membrane
  2. To reduce the required concrete strength
  3. To lift the panels during erection
  4. To transfer shear between adjacent panels after erection Correct answer.

Explanation

Shear keys and joint embeds transfer lateral forces between erected panels. They are not lifting devices, curing aids, or strength substitutes.

Question 35Foundations, Slabs-on-Grade, and Panel Casting Beds

A panel is being cast on a bed with a slight slope. What is the most appropriate action?

  1. Add extra bond breaker on the low side
  2. Proceed, since slope does not affect panels
  3. Increase the concrete slump to compensate
  4. Level the bed or adjust forms so the panel is cast to the required tolerances Correct answer.

Explanation

Slope can cause thickness variation and dimensional error, so the bed or forms must be corrected to meet tolerances. Adjusting concrete or bond breaker does not fix geometry.

Question 36Foundations, Slabs-on-Grade, and Panel Casting Beds

Why is it important to keep construction traffic off a freshly cast panel until the concrete has set sufficiently?

  1. Traffic helps curing compound penetrate
  2. Early loading can damage the green concrete and displace inserts Correct answer.
  3. Traffic improves surface finish
  4. Traffic is needed to compact the concrete

Explanation

Green concrete has little strength and can be damaged by early loads, and inserts can be displaced. Protection until adequate set is essential.

Question 37Foundations, Slabs-on-Grade, and Panel Casting Beds

Which of the following best describes the role of a release agent versus a bond breaker on a casting bed?

  1. A release agent is applied to reinforcement only
  2. They are identical products with different names
  3. A bond breaker is applied after panel lifting
  4. A release agent reduces adhesion at the interface, while a bond breaker provides a slip plane Correct answer.

Explanation

Both reduce bonding, but a bond breaker is intended to create a reliable separation plane for tilt-up lifting, while release agents reduce adhesion for form stripping. They are not interchangeable in all cases.

Question 38Foundations, Slabs-on-Grade, and Panel Casting Beds

During cold weather, what is a key concern when casting panels on an outdoor bed?

  1. Forms will expand and shrink panels
  2. Concrete may not reach the required lift strength before the scheduled lift Correct answer.
  3. Lifting inserts will corrode instantly
  4. Bond breaker will freeze and become permanent

Explanation

Low temperatures slow strength gain, so the panel may not reach lift strength on schedule. Cold-weather protection and strength verification are needed.

Question 39Foundations, Slabs-on-Grade, and Panel Casting Beds

What is the primary purpose of dowels or tie bars at slab construction joints where panels will be cast?

  1. To serve as bond breaker
  2. To act as lifting anchors for panels
  3. To provide a curing surface
  4. To transfer load across the joint and keep slab sections aligned Correct answer.

Explanation

Dowel and tie bars transfer load and maintain alignment across joints. They are not lifting anchors, bond breaker, or curing aids.

Question 40Foundations, Slabs-on-Grade, and Panel Casting Beds

A crew notices that a previously used casting bed has residual concrete buildup and old bond breaker. What should be done before casting new panels?

  1. Clean the bed and reapply bond breaker to ensure proper release Correct answer.
  2. Increase the concrete strength to compensate
  3. Cast over the buildup to save time
  4. Apply extra curing compound instead

Explanation

Residual buildup and old bond breaker can cause uneven surfaces and bond failure, so the bed must be cleaned and re-treated. Casting over buildup risks panel damage and dimensional error.

Question 41Foundations, Slabs-on-Grade, and Panel Casting Beds

Why must lifting inserts be positioned accurately relative to the panel's center of gravity?

  1. To improve the bond breaker performance
  2. To reduce the amount of concrete required
  3. To speed up curing
  4. To keep lifting forces balanced and avoid overstressing the panel Correct answer.

Explanation

Insert location affects load distribution during lifting; misplacement can cause unbalanced forces and cracking. Concrete quantity, bond breaker, and curing are unrelated.

Question 42Foundations, Slabs-on-Grade, and Panel Casting Beds

What is the purpose of a casting bed's edge forms being anchored or braced?

  1. To provide a place to store tools
  2. To hold the bond breaker in place
  3. To resist lateral pressure from fresh concrete during placement Correct answer.
  4. To support the panel after lifting

Explanation

Fresh concrete exerts lateral pressure that can displace unbraced forms, causing bulging or dimensional error. Forms must be anchored or braced to resist this pressure.

Question 43Foundations, Slabs-on-Grade, and Panel Casting Beds

A tilt-up panel is designed with a reveal or recess on its face. How does this affect the casting bed preparation?

  1. The reveal is cut into the panel after lifting
  2. The reveal is formed by the lifting inserts
  3. The reveal is applied as a coating after erection
  4. The bed must incorporate the reveal geometry so the recess is formed during casting Correct answer.

Explanation

When panels are cast face-down, reveals and recesses are formed by features on the casting bed surface. They are not cut after lifting or formed by inserts.

Question 44Foundations, Slabs-on-Grade, and Panel Casting Beds

Which factor most directly determines the required thickness of a structural slab-on-grade used as a casting bed?

  1. The type of bond breaker used
  2. The design loads the slab must carry, including panel weight and construction loads Correct answer.
  3. The color of the concrete
  4. The number of panels to be cast

Explanation

Slab thickness is governed by structural design for the loads it will experience, including panels and construction equipment. Color, panel count, and bond breaker type do not govern thickness.

Question 45Foundations, Slabs-on-Grade, and Panel Casting Beds

What is the main risk of casting panels on a bed that has not been properly cured or has excessive shrinkage cracking?

  1. Forms will not strip
  2. Cracks may reflect into or through the cast panels Correct answer.
  3. The bond breaker will not cure
  4. Lifting inserts will not set

Explanation

Cracks in the bed can reflect into panels or cause uneven support, affecting quality. Bond breaker curing, insert setting, and form stripping are not caused by bed cracks.

Question 46Foundations, Slabs-on-Grade, and Panel Casting Beds

In planning a casting sequence, why is it often preferable to cast panels in a layout that minimizes crane picks over occupied areas?

  1. To reduce the amount of bond breaker needed
  2. To reduce safety exposure and lifting risk during panel erection Correct answer.
  3. To speed up concrete curing
  4. To eliminate the need for lifting inserts

Explanation

Layout affects lifting logistics; minimizing picks over occupied areas reduces exposure to lifting hazards. It does not change bond breaker quantity, curing rate, or insert needs.

Question 47Foundations, Slabs-on-Grade, and Panel Casting Beds

What should be verified about a bond breaker product before use on a tilt-up casting bed?

  1. That it can also serve as a curing compound
  2. That it has the darkest color
  3. That it is the least expensive option available
  4. That it is compatible with the bed surface and intended for tilt-up use Correct answer.

Explanation

Bond breaker must be compatible with the bed and suitable for tilt-up to ensure reliable release without staining or bonding. Cost, color, and dual use are not primary criteria.

Question 48Foundations, Slabs-on-Grade, and Panel Casting Beds

Why is it important to document bed flatness and layout control before casting begins?

  1. To determine the concrete mix design
  2. To set the lifting schedule
  3. To satisfy the concrete supplier
  4. To provide a record for quality control and to resolve tolerance disputes Correct answer.

Explanation

Documentation supports quality control and provides evidence if tolerance issues arise. It does not determine mix design or lifting schedule.

Question 49Formwork, Edge Forms, and Panel Geometry

What is the primary purpose of edge forms on a tilt-up panel?

  1. To confine and shape the concrete at the panel perimeter Correct answer.
  2. To bond the panel to the casting slab
  3. To support the panel during its final erection
  4. To provide the lifting inserts for the crane

Explanation

Edge forms define the perimeter geometry of the panel and hold the concrete in place until it cures. They do not carry lifting loads, brace the erected panel, or bond the panel to the slab.

Question 50Formwork, Edge Forms, and Panel Geometry

The casting surface (floor slab) for tilt-up panels must be checked primarily for what characteristic before forming?

  1. Depth of control-joint saw cuts
  2. Slope toward the nearest drain
  3. Level and flatness sufficient for panel tolerance Correct answer.
  4. Color uniformity of the slab

Explanation

Panel geometry and thickness depend on a level, flat casting bed, so the slab must be evaluated for flatness and levelness within tolerance. Color, joint depth, and drainage slope are not the governing criteria for panel geometry.