Steel vs Concrete

Quick pick (TL;DR)

Pipe racks, platforms, long spans, fast schedule → structural steel (+ galvanizing/paint + fire protection).
Heavy static load, fire/blast, corrosive/marine, vibration damping → reinforced concrete.
Mix them (composite) to get speed + stiffness.
In a fire zone, steel always needs passive fire protection.

Step 1 — Compare

Factor	Structural steel	Reinforced concrete
Speed	Fast	Slower
Span / weight	Long spans, light	Short, heavy
Fire	Needs protection	Fire-resistant
Corrosion	Needs coating	Durable
Vibration	Lighter	Damps vibration
Modification	Easy	Hard

Step 2 — Typical choice

Structure	Usual choice
Pipe rack	Steel (concrete columns in fire zones).
Platforms	Steel + grating.
Vibrating equipment	Concrete.
Blast / fire-critical	Concrete / protected steel.
Building	Steel / concrete / composite.

Step 3 — Lifecycle cost

Compare total installed + maintenance cost — not just tonnage.

Common mistakes

Bare steel in a fire zone.
Light steel under vibrating equipment.
Choosing on tonnage alone.

Requisition & datasheet

Type, span, environment, fire, schedule.
System & grade, connection, protection, code.

Frequently asked questions

What should I know about Steel vs Concrete?

Pipe racks, platforms, long spans, fast schedule → structural steel (+ galvanizing/paint + fire protection). Heavy static load, fire/blast, corrosive/marine, vibration damping → reinforced concrete. Mix them (composite) to get speed + stiffness. In a fire zone, steel always needs passive fire protection.

Which standards or codes apply?

AISC 360 (steel), ACI 318 (concrete), ASCE 7 (loads); Thai DPT/EIT; ISO 12944 (paint), fire rating per the project fire study.

Standards — AISC 360 / ACI 318 / ASCE 7; Thai DPT/EIT; ISO 12944.