
Steel Fabrication
Cut, weld and polish galvanized steel to build stable main frame

Main frame: 80×100mm square tube, 2.5mm thick
Columns: 150×150mm galvanized square tube, 2.5‑3.0mm thick
Expandable wing frame: 50×100mm galvanized steel
Base beam: Reinforced channel steel & square tube
Surface: Hot‑dip galvanized + electrostatic spraying, rust‑proof, wind‑resistant & durable

Wall Panel: 75mm rock wool/EPS sandwich panel, double-sided galvalume steel sheet, Class‑A fireproof, heat‑insulating, waterproof & sound‑insulating, corrosion‑resistant.

Steel Fabrication
Cut, weld and polish galvanized steel to build stable main frame

Panel Assembly
Pre‑install wall panels, doors, windows and utilities with interior decoration

Fold Molding
Debug expandable structure, fold into standard shipping size

On‑site Installation
Transport to site, unfold rapidly for immediate use
Choose CASA BOX — Reliable Prefab Container Solution Worldwide
Expandable Container House
One‑Stop Prefabricated Building Solutions