What Are the Connection Methods Between GRC Curtain Wall and Main Structure?

Two Main Connection Categories

GRC curtain wall connections to the main structure fall into two main categories: rigid connections and flexible connections. Each suits different load scenarios, panel forms, and structural movement expectations.

1. Rigid Connections

Embedded parts (预埋件): Steel plates or bars embedded in the main structure during concrete pouring. GRC panels connect via welded or bolted joints to these embedments.
Post-installed anchors (后置埋件): For existing structures, chemical or mechanical anchors are drilled into the structure after curing.
Best for: Heavy-load regular panels on stable structures.
Materials per JGJ/T423-2018: Hot-dip galvanized embedments with HRB400 rebar.

2. Flexible Connections

Elastic bearings: Rubber or neoprene pads between panel and structure absorb thermal expansion and small structural movement.
Sliding nodes: Allow the panel to slide slightly along the connection axis.
Best for: Curved large-span walls, buildings with significant thermal cycling, or seismic zones.
Common combo: EPDM strip + sealant + polyurea coating as waterproof trio.

3. Connection Materials by Environment

● Standard inland: Hot-dip galvanized steel embedments
● Coastal or high-corrosion: 316 stainless steel embedments
● Cold regions: Low-temperature ductile steel to prevent brittle failure
● Seismic zones: Flexible connections mandatory

4. Selection Guide

● Heavy flat panels, low-rise, stable structure → rigid embedded parts
● Curved panels, high-rise, seismic zone → flexible sliding nodes
● Coastal or industrial atmosphere → 316 stainless
● Renovation of existing structure → post-installed anchors

Common Errors to Avoid

● Mixing carbon steel and stainless steel (galvanic corrosion)
● Omitting thermal-expansion clearance at rigid connections
● Using post-installed anchors where embedments should be cast-in

About Qinglong GRC — Guangdong Qinglong Construction Engineering Co., Ltd. Founded 1997 (28 years). 50+ patents. Integrated R&D, design, production, sales and construction. Contact: Mr. Song, +86 139 0259 7531. Address: 302 Card, No. 22 Dongming Road, Shiqi District, Zhongshan City.