The matter of steel size is part of the strength of home building work. and the strength of the knock-down house and the size of the steel structure. Big iron weighs more than small steel “thickness” of thick steel. It can bear more weight than thin steel, larger and thicker. The service life is more If compared to bear the same weight, compare large and small steel structures.
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Lifespan of a steel frame knock-down house Most will last 7-30 years depending on the size and thickness of the structure. and anti-rust painting of the structure regularly every 1-3 years
TIP Techniques for choosing steel boxes and C body to make the work more quality
If you want a standard job Must choose steel with a thickness of at least 1.5 mm., which most markets have a minimum thickness of 1.0 – 1.2 mm. Cost saving and contractors like to buy and use it because it’s cheaper than thick steel. If using steel with a thickness of 1.2 mm. The limitation of thin steel can not be welded completely. Because while welding, it is very easy to have problems with welding through holes. If you want beautiful welds It will take more time to connect. from the comparison of the increased labor cost with the cost of steel save a little considered not worth it
The principle of choosing the size and thickness of the steel frame that a single-storey house builder chooses to build a one-story house
Balcony beams/balcony columns should choose a steel box 100×100 mm., thickness 3.2 mm., length not more than 1.5 m., steel 2C 150 x 50 mm., thickness 3.2 mm. Length not more than 1.5 m. / Steel box 100×100 mm. Thickness 3.2 mm. Height not more than 1.5
Balcony, roof rafters, balcony should choose steel box 150×50 mm., thickness 3.2 mm., span not more than 3 m. / box steel 75×38 mm., thickness 2.2 mm. . Length not more than 3 m. / Box steel 150×50 mm. Thickness 2.3 mm. Length not more than 4 m.
The pole as if falling, as if falling, should choose steel box 50×50 mm., thickness 1.6 – 2.3 mm. / box steel 50×25 mm., thickness 1.6 – 2.3 mm. / box steel 25×25 mm., thickness 1.6 – 2.3 mm.
Balcony wall should choose steel box 50×50 mm. thickness 1.6 – 2.3 mm. / box steel 50×25 mm. thickness 1.6 – 2.3 mm. / box steel 25×25 mm. thickness 1.6 – 2.3 mm.
Stair structure, stair truss should choose steel box 100×50 mm. thickness 2.3 mm. / steel box 50×25 mm. thickness 2.3 mm.
For the bathroom floor, under the deck, should choose a steel box 50×50 mm., thickness 2.3 mm., overlaid with steel sheet 120×240 cm., thickness ≥ 1.5 mm. / steel box 100×50 mm., thickness 2.3 mm., overlaid with steel sheet 120×240 cm. . Thickness ≥ 1.5 mm.
Shades and sun shades should choose steel box 50×25 mm. thickness 1.6 – 2.3 mm. / box steel 25×25 mm. thickness 1.6 – 2.3 mm.
3.3 Compare the steel frame size and thickness
Steel frame knock-down houses are priced very differently. according to the size of the structure Approximate frame size, thickness, structure and truss, steel laying distance, frequency or distance, which most knock-down house enthusiasts do not know how to compare. The steel frame knock-down house is rarely specified. specification, size and thickness of steel, most of which use steel thickness The structure is about 1.8-2.3 mm., which is the grade of the contractor that focuses on Competing mainly on price But if it’s an engineer’s standard Will focus on the thickness of the structure at 3.2 mm. until the use of hot-rolled steel is a solid steel with a thickness of 4.0-6.0 mm.
Most inexperienced people buy the cheapest materials on the market. But cheap materials will not be durable. And most of them cost more to repair than later.
3.4 Compare steel thickness and price
If the steel is the same size as thicker steel therefore the price will be higher than some steel. The trading price of steel is based on weight. Thick steel will weigh more than thin iron From the experience of building a knock-down house Customers focus on asking only “The price of building a house” rarely asks about “Size and thickness of structural steel and truss”
For this reason, the price of the knock-down house is big and the lifespan of the house is very different as well.
TIP : If we will reduce the cost By reducing the thickness? Due to the high price of thick steel Does not meet business needs such as coffee shops, small shop kiosks
can reduce the thickness But more frequent rust-proof coatings are required every 1-2 years, depending on corrosive conditions. The purpose is to prevent the steel frame from being rusted and eaten. “Loss strength in loading” when steel does not lose strength. The structure will last a long time.. up to the same thickness as steel. case in form with building permit Must have a structural calculating engineer sign the certification. Do not reduce the size and thickness as specified by the engineer. Otherwise, the homeowner or contractor must be responsible for the strength of the building itself. if checked especially public buildings such as hotels, accommodation, dormitories, etc.
