Red Brick calculation program
Galvanized steel square tubes (GI Pre-zinc) are rust-resistant white steel, allowing for quick completion of projects without the need for painting.
galvanized steel box (Galvanized Steel TubeIt is a modern building material that offers speed and cost-effectiveness. Made from... Galvanized steel coils (GI) It is then rolled and shaped into square tubes or Flat pipe The weld seam is smooth, strong, and resistant to rust corrosion.
The main feature that makes this type of steel the most popular today is its... “"Ready-made"” For surface materials, customers don't have to spend time sanding off rust and applying rust-preventive primer like with black steel, resulting in a clean, fast, and cost-effective job site.
Why choose galvanized steel square tubes from AY Contento?
- 2-in-1 Value: It offers both the strength of steel and the rust protection of zinc in one product (like buying steel and getting a primer coat for free).
- Save Cost (Budget Savings): You can immediately eliminate the costs of anti-rust paint, thinner, and labor for painting.
- Beautiful Finish (Beautiful Skin): Silver Bright finish gives a modern, clean look, popular in cafes, restaurants, and loft-style offices.
- Variety (available in all sizes): We have a full stock, starting from small sizes. 1 x 1 inch For making furniture, up to large sizes. 4x2, 5x5 inches For post and roof structure work.
Applications
- Home renovation work: Garage posts, awning frame, privacy screen.
- Fence work: Metal sheet fence, artificial wood fence.
- Furniture DIY projects: Tables, chairs, shelves (popular sizes 1x1, 1x2 inches)
- Agricultural work: Greenhouse, vegetable trellis (highly resistant to humidity)
Standard Size and Weight Chart
(Including both square and flat grids in a single table, with clear categorization.)
Galvanized square steel tube (Square Tube GI)
Size (inches) | Size (mm) | Thickness (mm) | Usage recommendations |
3/4″ x 3/4″ | 19 x 19 | 1.0 – 1.8 | Small furniture work, wrought iron. |
1″ x 1″ | 25 x 25 | 1.0 – 2.3 | (Popular) Table legs, shelves, ceiling frames |
1 1/4″ x 1 1/4″ | 32 x 32 | 1.0 – 2.3 | Lightweight structure, clothes rack. |
1 1/2″ x 1 1/2″ | 38 x 38 | 1.2 – 2.3 | Wall structure, fence |
2″ x 2″ | 50 x 50 | 1.2 – 2.3 | Farmhouse posts, roof structure |
3″ x 3″ | 75 x 75 | 1.4 – 3.2 | Garage post, fence post |
4″ x 4″ | 100 x 100 | 1.4 – 3.2 | Main structural pillars |
Galvanized Rectangular Steel Tubes (GI)
Size (inches) | Size (mm) | Thickness (mm) | Usage recommendations |
2″ x 1″ (matchstick) | 50 x 25 | 1.0 – 2.3 | (Popular) Door frames, fence panels |
3″ x 1 1/2″ | 75 x 38 | 1.2 – 2.3 | Roof structure, crossbeams |
4″ x 2″ | 100 x 50 | 1.2 – 3.2 | (Popular) Rafters, purlins, load-bearing structures |
6″ x 2″ | 150 x 50 | 1.4 – 3.2 | Garage beam, large structure. |
Frequently Asked Questions (FAQ)
- Pre-zinc (this page): Thin galvanized steel sheets are manufactured in a factory and then rolled into shape. They have a smooth, shiny surface and are inexpensive, making them suitable for general indoor or outdoor applications.
- Hot-Dip (Galvanizing): Dipping structural black steel in a hot zinc bath results in a rough surface with a very thick coating, making it extremely rust-resistant (e.g., high-voltage power poles). It's significantly more expensive.
No, it's not necessary. Because it already has a rust-resistant zinc layer, but you can paint over it for aesthetic purposes if you want. A wash primer is required. Or, use a primer specifically designed for galvanized surfaces to ensure better paint adhesion.
In the weld area, the zinc is destroyed by the heat. Therefore, after welding is complete... It is necessary to spray with "cold galvanizing spray". Apply a new coat to the weld seam immediately to restore the rust-resistant properties of that area.
""Whether it's renovations or DIY projects, galvanized steel is the answer!""
Check the prices for 1x1, 4x2, or other sizes of boxes. We have plenty of stock and are ready to ship.
🟢 Line: @aycon
📞 Tel: 083-0243351
🚚 Delivery service: Pickup truck/6-wheel truck express delivery throughout Thailand.
Thirut –
Good price, fast delivery, and the sales person provided excellent service. I will definitely order again.
Pok –
The sales staff took good care of me. They could find anything I ordered.