Sheets of galvanized iron (GI) are widely available in the Philippines. They are utilized in residences, commercial buildings, and agricultural structures. Their popularity stems from a straightforward yet efficient procedure. A steel sheet is coated with a protective layer of zinc. The steel becomes rust-resistant as a result of this process. Additionally, it extends the sheet’s lifespan. These sheets are used by contractors and homeowners in the Philippines for a variety of tasks. For a nation with tropical weather, GI sheets in the Philippines are a wise option due to their durability. These are some of the most common queries regarding this helpful resource. You will learn more about GI sheets and their applications from this information.
What are GI sheets and why are they used?
Steel sheets with a zinc coating are known as GI sheets. Galvanization is the process used to apply this coating. The steel underneath is shielded by the zinc. The zinc corrodes first, not the steel, if the sheet is scratched. One important characteristic of galvanized materials is this “sacrificial” protection. Their resistance to rust makes them widely used. This is crucial in a humid nation like the Philippines. When exposed to moisture and rain, plain steel would rust rapidly. GI sheets are strong and long-lasting because of their resistance to rust. In addition, they are less expensive than alternative materials.
What are the different types of GI sheets available?
The two most prevalent GI sheet types are corrugated and plain. The surface of plain sheets is smooth and level. They are frequently utilized for fences, wall cladding, and other fabrications. The pattern of corrugated sheets is distinctly wavy. They are strengthened by this design, which also aids in water runoff. They are therefore widely used in roofing applications. Additionally, pre-painted GI sheets, or PPGI sheets, are available. The zinc coating on these sheets is covered with a layer of paint. The paint offers a decorative finish and an additional layer of protection. Galvalume is an additional variety that is coated with a mixture of silicon, zinc, and aluminum. Even greater corrosion resistance is provided by this blend.
How is the quality of GI sheets measured?
The quality of a GI sheet is primarily measured by its gauge and its zinc coating. Gauge refers to the thickness of the sheet. It is an inverted scale; a lower gauge number means a thicker sheet. For example, a Gauge 26 sheet is thinner than a Gauge 18 sheet. Thicker sheets are stronger and more resistant to impact. The zinc coating is measured in grams per square meter (GSM). A higher GSM indicates a thicker zinc layer. This thicker layer provides better protection against rust. For roofing in the Philippines, a certain minimum thickness is required by standards. This ensures the sheet can withstand local weather conditions.
What are the common uses of GI sheets in the Philippines?
In the Philippines, GI sheets are a go-to material for many construction projects. The most common use is for roofing, especially in residential and commercial buildings. Their ability to handle heavy rain and strong winds makes them an ideal choice. They are also used for wall cladding, which provides a durable exterior for structures. GI sheets are also used for industrial purposes. Examples include ducts, drainage systems, and structural parts. Their versatility and strength make them useful for a wide range of applications.
How can you install and maintain GI sheets?
Proper installation is key to ensuring the long life of your GI sheets. The sheets should be laid from the bottom of the roof working upwards. Each sheet needs to overlap the one below it. This ensures that water drains off the roof effectively. Roofing screws with rubber washers are used to secure the sheets. These washers prevent water from leaking through the screw holes. Maintenance is minimal but important. Regularly clean the sheets to remove debris like leaves and dirt. Check for any signs of damage or loose screws. If a sheet is severely damaged, it is easy to replace it. A good quality GI sheet can last for decades with proper care.
Are there fire safety concerns with GI sheets?
GI sheets are made of steel, which is a non-combustible material. This means they will not catch fire or help a fire spread. They have a high melting point, so they can maintain their shape even in high heat. This makes them a fire-safe material for construction. They do not burn. However, the heat from a fire can still cause them to warp. This is true for any metal. Still, their non-combustible nature provides an added layer of safety. This is an important point when selecting materials for a building.
Key Takeaway
GI sheets are a staple in the Philippine construction industry for many good reasons. The galvanized coating makes them highly resistant to rust. This quality is crucial given the country’s climate. They come in various types and gauges to fit different needs. The most popular are corrugated for roofing and plain for other uses. Proper installation and minimal maintenance can ensure they last for a very long time. Their strength, durability, and fire resistance make them a reliable material. Understanding these features helps you choose the right GI sheets in the Philippines for your next project.
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