From Arslan Demir

News

Notes from the field, completed work and company announcements.

Types of steel pipe: which one for which job?

Six main types, from black welded to galvanised, water-gas to fire and boiler pipe: sizes, standards and what each is actually for.

The letters on hot-rolled sections are not arbitrary; each means a different profile and a different job.

Box section sizes from 20×20 to 200×200, wall thicknesses and what each size is actually used for on site.

Three sheets, three surfaces, three jobs. Which takes paint, which survives outdoors, which stops you slipping.

The difference between the two cores shows up in fire behaviour and weight, not in insulation. Here is which building calls for which.

Span, purlin spacing, trusses and the order of erection: what actually sizes a steel building.

Salt air shortens the life of steel several times over compared with inland. Which protection is enough, and where, on the Alanya coast.

Which roof calls for which, which needs insulation, and what goes under shingle. The points that decide it.

Deck that removes formwork stripping, and cement-bonded boards: what each is for and what to watch.

An order described incompletely means a crew waiting on site. What to have in hand before you call.