Glass Curtain Wall Installation Case Study
Zhongyin Plaza 3# Building
Survey control, framing accuracy, hidden-frame glazing and weather sealing
A disciplined installation story from survey control and mullion and transom installation to hidden-frame glazing, fire stopping and handover.
Project CAD Drawings
Facade elevations and curtain wall details
A drawing preview of the Zhongyin Plaza 3# Building, covering the principal elevations, vertical sections and key glass curtain wall interface details.
Project Snapshot
Precision is the facade
The project combines a transparent retail envelope with a carefully sequenced site installation plan. The glass curtain wall scope focuses on the south, east and north elevations of the 3# building.
The Brief
Make a complex envelope feel simple
The building uses a mix of glass curtain wall, aluminum panel curtain wall, grille elements, titanium-zinc panels and a glazed roof structure. For the glass facade, the installation logic had to absorb real structural conditions without compromising line, level or weather performance.
Core project principle: resolve the building in measured increments, verify every frame zone before glazing, and keep the final seal continuous from the facade to the primary structure.
Installation Logic
Five controlled moves
The documented sequence is deliberately linear. Each stage closes a risk before the next layer is added to the facade.
Establish the datum, level lines and facade control grid. Measure embedded-plate deviation and record the result.
Install vertical mullions from the base upward, adjust brackets and confirm plumb before final fixing.
Install horizontal members from the lower line upward and check each completed floor for level and alignment.
Clean the glass, orient the coated surface correctly, place elastic blocks and prevent metal-to-glass contact.
Close perimeter joints with sealant and mineral fire-stop insulation, then clean, protect and prepare for handover.
At height, the survey sequence matters as much as the installation sequence. The method calls for recurring checks at corners, facade transitions and level changes, with work paused when wind conditions exceed the defined limit.
For the framing, welded steel supports are checked for complete welds and then protected against corrosion. Dissimilar metal contact is separated with corrosion-resistant pads, supporting long-term system stability.
Survey and Setting-Out Standard
Fix the datum before the facade
The source method statement treats setting-out as a closed inspection loop: establish the reference, build the control grid, verify deviations, correct them and archive the result before the next layer begins.
| Datum and references | Use the primary structure's +/-0.00 datum, the supplied 1 m line and axis lines as the setting-out basis. Establish the benchmark and horizontal control network before locating the curtain wall grid. |
|---|---|
| Instrument readiness | Prepare a theodolite, level, plumb bob, tensioner, water level and welding equipment. Use calibrated measuring instruments and verify the building condition against the design and construction drawings before measurement. |
| Inspection sequence | Set the key-floor horizontal line, establish auxiliary level lines, mark mullion locating points, reinforce the points, pull the horizontal line, check and adjust error, complete horizontal zoning, recheck the zones, hang and fix the vertical line, then inspect corners and every facade transition. |
| Deviation closure | Report the control line for inspection, measure embedded-plate deviation, report the result, correct the structural deviation, remeasure and file the final measurement record. Errors are decomposed promptly rather than accumulated between floors. |
| Curved facade | For the curved market elevations, use X/Y point coordinates to define the outer skin point of each mullion. Set the horizontal grid by elevation, verify the chord/radius relationship, mark each +500 mm control line and transfer levels floor by floor from the ground control point. |
| Working conditions | Carry out high-rise measurement only when wind force is no greater than level 4. Repeat the survey at a fixed time each day to reduce temperature-related movement and keep the facade grid consistent. |
| Fabrication checks | Mullion cutting: +/-1.0 mm; transom cutting: +/-0.5 mm; hole position: +/-0.5 mm; hole spacing: +/-0.5 mm; cumulative tolerance: no greater than +/-1.0 mm. The source also records the end-angle tolerance as -15 degrees. |
Source basis: Section 8.1, Glass curtain wall construction method and process requirements, including the setting-out sequence and measurement requirements in the original method statement. Confirm the current project specification and applicable code edition before construction.
Detail That Performs
Every interface has a job
The hidden-frame detail relies on a coordinated set of interfaces: aluminum profiles, elastic setting blocks, rubber gaskets, sealant joints, steel brackets and fire-rated insulation at the structural edge.
Glass is supported on at least two elastic setting blocks per panel. The documented detail also calls for a minimum 100 mm block length, compliant glass edge engagement and a continuous sealed joint at the perimeter.
Original Source Drawings
Original detail references
The original document stores its technical illustrations as embedded CAD/OLE previews. The source previews below are included directly in this case study.
Quality Control
Built into the sequence
The case is not only about appearance. It is about closing the small technical decisions that protect alignment, safety, water resistance and durability.
Measured before fabricated
Review drawings, remeasure the primary structure and adjust any curtain wall deviation only with the required design approval.
Frame tolerance under control
Documented cutting tolerances include +/-1.0 mm for mullions, +/-0.5 mm for transoms and +/-0.5 mm for hole position and spacing.
Glass protected at every edge
Do not allow direct glass-to-metal contact. Use the specified elastic blocks, gaskets and edge clearances before pressure components are closed.
Sealant is a system
Clean and dry the joint, prevent three-sided adhesion, use backing material, tool the bead smooth and remove excess sealant immediately.
Fire and rain stay continuous
Fill the facade-to-structure gap with fire-rated insulation and close the interior and exterior faces with a continuous watertight seal.
Handover includes the record
Complete final cleaning from top to bottom and deliver both the finished facade and the supporting quality documentation.
Technical basis referenced in the source method statement includes GB/T 21086, JGJ 102, GB 50300, GB 50210 and related glass, fire and structural installation standards. Always confirm the current project specification and applicable edition before construction.
REACH BUILDING
Glass is the visible part. The real performance lives in the interfaces.
REACH BUILDING supports project teams with architectural glass selection, custom processing, matching profiles and technical guidance for facade applications.
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