Review façade precast panel support, bearing, and erection tolerances defines field checks for site engineers to verify supports, bearings, and alignment against drawings, ensuring safe installation, accurate joints, and durable performance.
- Verify supports, pads, and anchors match approved drawings and submittals
- Measure plumb, level, joint width, and offsets within stated tolerances
- Document survey readings, photos, lot numbers, and digital approvals
- Interactive, commentable checklist with export and QR code verification
The checklist
Pre-Erection Verification
- Confirm latest drawings and panel IDs before lifting.
- Verify panel mark numbers against delivery dockets and erection drawings; acceptance: 100% match; evidence: photos of tags and signed delivery log.
- Survey support steel/concrete seats to control points using total station; tolerance: elevation within ±6 mm of datum or per approved specifications; upload survey file and annotated screenshots.
- Confirm embed plates/inserts locations and thread condition with template and thread gauge; acceptance: hole/insert offset ≤10 mm from drawing; evidence: photos and gauge readings.
- Check bearing pads type, hardness, and size against submittal; acceptance: dimensions within ±2 mm, correct durometer; evidence: packaging photo, lot/batch number, installed pad photo.
Bearing and Support Conditions
- Measure effective bearing length/width at each seat with steel rule; acceptance: length ≥50 mm and full pad contact, or per approved specifications; evidence: close-up photos with scale.
- Inspect shim stacks for material, count, and seating; acceptance: as designed, stable stack with full contact, individual shim gaps ≤1 mm; evidence: photo before load transfer.
- Verify grout bed/leveling nut arrangement per drawings; acceptance: grout thickness 10–25 mm uniform or nuts engaged ≥1.5× bolt diameter; evidence: measurements and batch ticket.
- Confirm isolation/slip layers where specified to prevent restraint; acceptance: bond-breaker present and continuous at bearing; evidence: photo and material label.
- Check corrosion protection of plates/bolts after handling; acceptance: coating intact, dry film thickness per approved specifications; evidence: DFT gauge readings and photos.
Panel Erection Alignment and Tolerances
- Measure panel plumb with total station/laser; tolerance: out-of-plumb ≤6 mm in 3 m and ≤12 mm overall height; evidence: survey report and marked photo.
- Check top-of-panel elevation to control marks; tolerance: ±6 mm; evidence: laser level reading photo and recorded value.
- Verify horizontal alignment to grid line using total station; tolerance: ±6 mm; evidence: points list and screenshot of layout.
- Measure joint width at three locations per joint with feeler gauges; tolerance: design width ±6 mm, no abrupt change >3 mm; evidence: close-up photos.
- Check face offset (step) between adjacent panels with straightedge; tolerance: ≤3 mm; evidence: straightedge photo with scale.
- Assess twist/warp using diagonal string line or laser plane; tolerance: differential ≤6 mm corner-to-corner; evidence: measurement photo and note.
- Install and verify temporary bracing per engineer’s plan; acceptance: location, angle, and anchor type correct; record brace ID and torque values.
Connections and Hardware
- Confirm bolt grade, length, washers, and coating per submittal; acceptance: correct components, threads undamaged; evidence: packaging photo and installed detail.
- Tighten bolted connections to specified snug/torque; acceptance: torque within manufacturer range or as specified; evidence: calibrated wrench ID and readings.
- Verify welded connections per drawings/WPS; acceptance: weld size not less than specified, free of visible defects; evidence: fillet gauge photo and welder ID.
- Check slotted/adjustable connections maintain required movement clearance; acceptance: measured slot length and free gap per drawings; evidence: measurement photos.
- Confirm anti-uplift/locking devices are engaged; acceptance: lock nuts set, keeper plates installed, residual gap ≤2 mm; evidence: photos and checklist initials.
Documentation and Sign-Off
- Record panel ID, location, lift time, and crew; acceptance: sequence matches erection plan; evidence: daily log entry.
- Upload as-built survey with control sketch; acceptance: all measurement points included; evidence: PDF/DWG plus CSV of readings.
- Capture final photos: full elevation, joints, supports, and connection close-ups; acceptance: clear, geotagged images; evidence: photo set attached.
- Obtain digital approvals from site engineer and QC; acceptance: signatures and date/time stamp; evidence: signed checklist with QR link.
Preview the printable checklist
Preview page one below. Open the image or download the PDF for all pages.
At a glance
- Confirm support readiness, bearing pad compliance, and insert locations before lifts, then control alignment during erection. This prevents panel cracking, overstressed connections, and misaligned joints that trigger costly rework and schedule slippage.
- Adopt measurable tolerances for plumbness, elevation, joint width, and offsets using a total station, laser level, gauges, and calibrated torque tools. Capture photos, survey files, batch data, and signatures for traceable quality evidence.
- Interactive online checklist with tick, comment, and export features secured by QR code. Supervisors, erectors, and QA teams can collaborate in real time and archive authenticated records for turnover and future maintenance.
- Standardize acceptance cues: minimum bearing length, shim stack configuration, weld/bolt verification, and bracing installation. Clear acceptance thresholds and evidence requirements reduce ambiguity, speed approvals, and align the field with approved drawings.
How to Use This Interactive Checklist
- Preparation: Gather latest approved drawings, erection plan, submittals, total station/laser level, fillet and feeler gauges, calibrated torque wrench, DFT gauge, shims and pads, PPE, and access equipment. Establish control points and verify tool calibrations.
- Using the Interactive Checklist: Start interactive mode, select location/elevation, and tick items as completed. Add comments with photos, survey files, and batch data. Tag issues for resolution and export running reports to PDF/Excel at milestones.
- Sign-Off: Capture final survey and photo set, obtain digital signatures from the site engineer and QC, and generate an export. Share the QR-authenticated package with stakeholders and archive per project procedures.
Set the Stage: Supports, Bearings, and Readiness
Erection quality starts before the first pick. Survey support steel and concrete seats to confirm level and elevation, then verify embed locations and thread condition. Bearing pads and shims must match approved submittals, including size, durometer, and stack configuration, to distribute loads evenly and avoid restraint. Where drawings require bond breakers or isolation, ensure continuous coverage to prevent unintended fixity. Record batch data for grout or pads, and check corrosion protection on plates and bolts after handling. These readiness checks eliminate surprises when the crane is on the clock, reduce panel damage, and set a repeatable baseline for alignment. Acceptance should reference approved project specifications and authority requirements where stricter; when not stated, use practical cues like full pad contact, minimum 50 mm bearing, and tight shim seating. Finish by photographing each bearing, capturing survey points, and labeling positions to speed later review and sign-off.
- Survey seats to ±6 mm elevation before lifting
- Match pads and shims to approved submittals
- Ensure isolation layers where drawings require
- Capture batch numbers, DFT, and condition photos
- Label positions to streamline review and sign-off
Control During Erection: Alignment and Tolerances
With the panel suspended, use a total station or laser to set plumb, elevation, and horizontal position. Work to achievable field tolerances: out-of-plumb within 6 mm in 3 m and 12 mm overall height, joint width within ±6 mm, and face steps not exceeding 3 mm. Check twist using a diagonal string or laser plane to avoid long-term stress and misaligned joints. Temporary braces must be placed as engineered, with anchors and torque recorded. Adjust shims or slotted connections incrementally to achieve final line and level without prying on hardware. Document every reading and adjustment, including photos showing gauges on the surface. These controls minimize cracking, water paths, and future envelope issues, while speeding acceptance.
- Measure plumb, level, grid with total station
- Hold joints to design width ±6 mm
- Limit face step between panels to ≤3 mm
- Record brace installation and torque
- Photograph gauges on the panel face
Lock It In: Connections, Movement, and Evidence
After alignment, install final connections to the drawings. Verify bolt grade, washers, and coating, then tighten to the specified snug or torque, recording calibrated wrench IDs. Inspect weld sizes using fillet gauges and ensure visible quality meets the WPS; schedule NDT where specified. Adjustable or slotted brackets must retain required movement clearance, preventing locked-in restraint from temperature or frame drift. Confirm anti-uplift or keeper devices are engaged. Finish with grout or nut settings as designed, and recheck clearances after load transfer. Compile the evidence: as-built survey, close-ups of supports and joints, photos of gauges, batch tickets, and digital signatures. This documentation proves conformance, simplifies handover, and supports warranty discussions.
- Verify bolt grade, washers, and torque
- Gauge weld size and visible quality
- Maintain movement clearance at slots
- Engage anti-uplift/locking hardware
- As-built survey and signatures attached
