Steel & Stainless -Steel Mullion

---

Overview

GSK Global FZC L.L.C., in collaboration with JZM Facade, delivers precision-engineered steel and stainless-steel mullion–transom profiles, designed for high-performance curtain wall systems, large-span façades, and complex building envelopes.

System Description

Mullion–transom systems are typically used in stick-built and unitized curtain wall applications, where:

Mullions (Vertical Members):Transfer wind loads and vertical loads to floor slabs and structural anchors

Transoms (Horizontal Members):Support glazing units and distribute loads between mullions

Integrated System:Provides a structural grid for glass, metal panels, louvers, and façade infills

Curtain walls themselves are non-load-bearing external systems, designed to transfer environmental loads back to the main structure .

Material Options

Carbon Steel:

• S275 / S355 / Q235B
• High strength for heavy-load applications

Stainless Steel:

• Grade 304 / 316 / 316L
• Superior corrosion resistance for coastal and exposed environments

Hybrid Systems:

• Steel-reinforced mullions combined with aluminium caps or covers
• Optimized for strength + thermal performance

Engineering & Design Capabilities

Through JZM’s advanced fabrication and façade engineering expertise:

Custom-designed profiles based on project load calculations

Optimized section depth and inertia for deflection control (L/175 typical façade criteria)

Capability to support large-span and heavy glazing systems

Integration with:

• Structural glazing
• Unitized curtain wall systems
• Double / triple glazed IGUs

Compatibility with thermal break systems and EPDM gasket sealing

Modern systems allow large spans, high wind-load resistance, and flexible façade geometries .

Manufacturing Capabilities (JZM Facade)

• CNC laser cutting and precision machining
• High-accuracy bending and roll forming
• Robotic and certified welding processes
• Tight fabrication tolerances (±0.5 mm)
• Surface flatness and alignment control for façade precision
• All profiles are manufactured to ensure perfect interface with glass, brackets, and fixing systems.