Corrugated Steel

Emblematic for the other architecture



Photo 1. Mexican restaurant in Ebisu, Tokyo, Japan. A welcome natural look between the average contemporary but sterile architecture. Corrugated steel in all its splendour.

Corrugated steel is probably the most iconic of all building materials used in squatter settlements. It is a versatile product as it is strong, watertight, easy to cut, and above all cheap. To many of us, corrugated steel may look ordinary and simple but it is exactly this simplicity which makes it such a brilliant invention. The core of it all is, needless to say, a steel sheet with a thickness of only 1 mm. Such a sheet can be bent or folded in any direction, as a flat sheet has limited stiffness. It is the corrugation which adds the typical structural character. A corrugated steel plate can easily be bent in one direction, whereas at the same time it is very rigid in the other direction.

The production of steel plate is straightforward. Solidified steel bars are rolled until they have the required thickness. Cutting is as easy as cutting paper. Then comes corrugation which requires the most basic of all machines. Let’s say that a classic machine has gear wheels. A corrugation machine would consist of two gear wheels only, nothing more than that. Turning one wheel will automatically turn the other wheel . By feeding a flat steel plate between the two wheels, a regularly corrugated steel plate will appear on the other side of the wheels. The process is beautifully simple.

The resulting wave form sheets are excellent for roofing. Due to their stiffness the sheets need limited structural support. Much like ceramic roof tiles, a limited overlap of sheets will result in a water tight roof. The corrugation prevents leakage to the sides of the sheets.



Photo 2. Corrugated steel in detail, thin like a curtain. Corrosion is typical for re-used sheets.

Steel and water are not exactly friends, which is why steel plates corrode. To avoid this corrosion, steel plates are bathed in molten zinc, a process called galvanising. The zinc keeps the water out and even inverts the corrosion process of steel. Zinc has self healing properties in case of damage of the zinc layer, be it to a certain extent. Galvanised steel can therefore not be bent, under pain of corrosion. This is probably why recycled corrugated steel sheets have a limited life, as in the process of demounting, they are often bent more than is advisable.





Photo 3. Temporary housing for road construction workers. Alibag, Mumbai, India.

The use of corrugated steel for housing has certain drawbacks. Due to its thinness, it has zero insulation capacity, leaving the interior virtually fully exposed to the fierce tropical sun. In the rainy season steel roofs are extremely noisy. It means that corrugated steel creates comfort problems all year round. This is probably why in Mumbai the use of corrugated steel is limited to the temporary housing of construction workers on building sites. Such housing is often provided by the construction company, in which case it is the easiest (i.e. cheapest) material to use. Those people who create their own shelter apparently prefer other materials than corrugated steel. It is something to consider in rehabilitation projects too.





Photo 4. The architecture of the other end. Sheets made in mass production, thought of as a system of repetition, applied in a system-less order.

As the production process is so simple, corrugated steel is ideal for mass production. By its form, it is ideal for covering large surfaces such as roofs and facades, as that would require the least of handling per sheet. This is what distinguishes the architecture of settlements from architectural design. The latter most of the times is an attempt to make something special with materials best used in a system of endless repetition which fails where it meets other systems , whereas settlers are inventive in making something unique with individual sheets, not hindered by any system at all.

The emblematic value of corrugated steel in squatter settlements lies in the fact that it is indicative for the poorest ways of creating shelter and for the poorest ways of offering relief.

18 comments:

  1. Dit materiaal levert weer bijzondere beelden op.
    Groet, Femia.

    ReplyDelete
  2. Romantische beelden maar je zal er maar geboren zijn en moeten wonen !

    ReplyDelete
  3. Het is opmerkelijk hoeveel onderzoekers die rapporteren over hun bevindingen in sloppenwijken, worden weggezet als 'romantici' wanneer ze oog blijken te hebben voor meer dan ellende alleen.

    ReplyDelete
  4. Hey sir I wanted to ask you if these pictures are yours or not, or there is some kind of a reference for each for further use :) thanks!

    ReplyDelete
  5. I found that site very usefull and this survey is very cirious, I ' ve never seen a blog that demand a survey for this actions, very curious... A kitchen remodel in Santa Fe

    ReplyDelete
  6. Thanks for sharing this useful information. Please choose LCP Building Products Pvt Ltd for Building Materials Suppliers in India.

    ReplyDelete
  7. The post is so good and interesting thank you for sharing this blog with us keep share in future, if you are looking best roofer for renovate or change your roof then you should visit Roofers In Irvine because we offer the best work of roofing in reasonable prices.

    ReplyDelete
  8. Awesome blog!!! Thanks For Sharing it. It Provides Good Information About galvanized corrugated roofing sheets Emblematic for the other architecture

    ReplyDelete
  9. Very Nice post ! It give me new information about Roofing Sheets is the best choice and they are one of the leading roofing sheet providers in India. They provide all types of roofing sheets for your home, buildings, and office.

    ReplyDelete
  10. Thank you for sharing this valuable knowledge.

    I've read a lot of blogs, but I've never seen anything quite like this. Furthermore, I'm grateful for the opportunity to introduce myself through your posts. All you've written has left me speechless. For an instance, I've bookmarked this for future reference because it's still really useful, even after many years. Metal building kits are really cost-effective and long lasting for covering vehicles.

    ReplyDelete
  11. IF you are worried about your roofing and looking for best ROOFERS IN HUDDERSFIELD so you should visit Safeway Roofing Yorkshire because we offer the best work and services of roofing and also now we offer our best quality work of roofing in HUDDERSFIELD at minimum prices.

    ReplyDelete
  12. There's no denying that replacing a commercial roof is an expensive investment for property owners. NRCA roofing contractor When multiple repairs are required at the same time, the expense of each one can quickly add up. When your flat roof is beyond repair, it's time to replace it. Naples Roofing is among the Best Roof Maintenance Contractors in Buffalo, NY.

    ReplyDelete
  13. Naples Roofing is majorly among the Commercial Roofing contractors in USA that offers more than 45 years of expertise in building commercial roofing systems.The life cycle cost, roof traffic, warehouse contents, and considerations like long-term ownership vs. short-term ownership leasing are all taken into account when deciding which sort of commercial roofing system these huge projects require.

    ReplyDelete
  14. As an avid follower of construction innovations, I couldn't help but express my admiration for the comprehensive range of Sandwich Puf Sheet showcased on Viraat Industries' website. These sheets are undoubtedly revolutionizing the way structures are built, offering an unmatched blend of insulation, durability, and versatility.

    What truly stands out to me is the exceptional thermal insulation provided by Sandwich PUF Sheets. In today's eco-conscious world, where energy efficiency is paramount, these panels offer a sustainable solution that significantly reduces heat transfer. This not only contributes to creating comfortable indoor environments but also helps in lowering energy consumption, thus aligning with green building practices.

    ReplyDelete
  15. "Stay ahead of safety regulations by equipping your team with quality warehouse gloves." Warehouse Gloves

    ReplyDelete