Scope of Work
1. Pre-Construction & Survey Control
Control Network Establishment:
Transferring main site datums and gridlines from the main contractor to the specific floors requiring facade installation.
Benchmark Creation:
Setting up local, high-accuracy benchmarks and reference points on every floor using a high-precision total station.
Instrument Calibration:
Calibrating and verifying total stations, prisms, and laser plummets daily to maintain sub-millimeter accuracy.
2. As-Built Surveys (Pre-Installation Verification)
Structure Mapping:
Surveying the as-built concrete slabs, columns, and beams to identify deviations from the structural design.
Deflection Checking:
Measuring floor-to-floor heights and edge-of-slab profiles to spot any sagging, tilting, or structural variances.
Conflict Identification:
Highlighting variations that exceed allowable tolerances to engineering teams before facade fabrication or installation begins.
3. Setting Out & Layout Marking
Bracket Positioning:
Marking the exact 3D coordinates (X, Y, Z axes) for facade brackets, anchors, and embedding plates on the concrete structure.
Plumb & Alignment Lines:
Projecting precise vertical (plumb) and horizontal alignment lines along the building's exterior face.
3D Coordinate Control:
Utilizing coordinates extracted directly from CAD/BIM models to guide the installation crew.
4. Progress Monitoring & Quality Control
As-Installed Verification:
Surveying facade panels immediately after installation to verify they are perfectly level, plumb, and aligned with the design grid.
Tolerance Monitoring:
Monitoring clearance gaps and joints between panels to ensure uniform thermal expansion space.
Deformation Tracking:
Performing periodic checks on installed facades to detect any movement or displacement caused by construction loads.
5. Data Management & Reporting
BIM/CAD Integration:
Downloading digital layout points from BIM software (like Revit) into the total station, and uploading field data back to the office.
As-Built Documentation:
Generating comprehensive survey reports, deviation maps, and "as-built" drawings for client sign-off.
Discrepancy Reporting:
Raising Immediate Corrective Action (ICA) reports when structural or facade deviations exceed design limits.
6.Adherence to safety practices in the workplace.