Articles
Articles
Buying guides, standards, installation and market analysis for steel buyers, from the Ahan Asa editorial team.
Buying guide
Buying structural hollow sections (SHS and RHS): sizes, wall thickness, weight, ordering
What to check before buying square and rectangular hollow sections: catalog sizes and wall thicknesses, weight per metre and length, S235JRH, ordering.
4 min read
Construction technology
Light Steel Framing (LSF): What It Is, Its Limits, and Where Hot-Rolled Steel Fits
Light steel framing explained: cold-formed galvanized sections, how LSF is built, its strengths and limits, and where rebar and hollow sections fit.
4 min read
Installation & application
Box Column or Double IPE Column? A Practical Comparison for Steel Frames
Hollow-section box columns and built-up double IPE columns compared on structural behaviour, beam connections, fabrication, coating and what to order.
4 min read
Market analysis
What Moves the Iranian Rebar Market? A Buyer's Guide
What drives the Iranian rebar market: billet and the production chain, power and gas limits at mills, construction and export demand, and product specs.
4 min read
Standards & specifications
S235JR vs S355JR steel sheet (ST37 vs ST52): differences and typical uses
S235JR vs S355JR hot-rolled sheet and plate, known in Iran as ST37 and ST52: yield strength, chemistry, weldability, toughness class and weight compared.
4 min read
Buying guide
IPE vs IPN Beams: Key Differences and Which One to Choose
IPE vs IPN beams compared: flange shape, weight, stiffness and bolted connections, with figures for sizes 200, 240 and 300 and practical buying advice.
4 min read
Installation & application
Storing Steel on Site: How to Keep Rebar, Beams and Sheet Free of Harmful Rust
How to store rebar, beams and steel sheet on site: blocking off the ground, the right cover, drainage, and telling surface rust from harmful corrosion.
6 min read
Buying guide
How to Buy Rebar for a Residential Building: From Drawings to Delivery
Rebar buying guide: read grade and bar sizes from the drawings, turn the bar schedule into tonnes, check the quotation and inspect the delivery on site.
4 min read
Standards & specifications
Rebar and IPE Beam Weight Tables: Weight per Metre and per 12 m Bar
Rebar weights from 8 to 32 mm and IPE beam weights from IPE 80 to IPE 400: kg per metre, kg per 12 m bar, cross-section areas and a quick site formula.
2 min read
Construction technology
U-Boot and Cobiax Voided Slabs: How They Work and Where Rebar Fits
How U-Boot and Cobiax two-way voided concrete slabs work, what the maker and trade press report, what to watch on site, and where rebar fits.
3 min read