Concrete decking — also called a concrete spacer or concrete cover block (locally known in Indonesia as tahu beton) — is used to support rebar so it stays in position and maintains the correct concrete cover distance during concrete casting.
Concrete decking keeps the rebar from touching the formwork or base surface directly, so the concrete can properly cover the rebar. Concrete cover protects the rebar from the environment, corrosion, and heat — while also preserving the strength and lifespan of the building.
BDI doesn't just sell "concrete decking". BDI keeps the concrete cover exactly as designed — with 4 models, 25 size variants, and tested compressive-strength quality.
From horizontal rebar to shear walls — choose the model that fits your application needs.
Model with an interlock system that keeps the rebar position more stable. Suitable for slabs / floor plates and layered applications.
A practical, versatile single model for various rebar positions.
A round model for cover needs on specific elements with a precise shape.
Model with binding wire — typically used on shear walls and installations that require a strong tie.
From field workers to large-project procurement officers — choose according to your role.
The goal isn't to become an engineer — but so you can speak with engineers in their language. Complete with international equivalents (ACI, Eurocode, JIS, KS, GB).
The distance between the concrete surface and the outer surface of the rebar. Its function is to protect the rebar from corrosion & fire, maintain strength, and extend the building's lifespan.
Steel bars inside concrete to resist tensile forces — because concrete is strong in compression but weak in tension.
A flat concrete element: house floors, building floors, concrete roof decks.
Carries loads from the slab, then transfers them to the columns.
A vertical element. Carries loads from the beams, then transfers them to the foundation.
Connects several piles into one unit.
A structural wall that resists earthquakes.
How long the building stays in good condition. The engineer's target is not just strong, but also durable.
There are many types of cracks. A crack ≠ building collapse, but it must be analyzed.
Concrete shrinks as it dries — normal, but excessive shrinkage can cause cracking.
Occurs when concrete isn't fully compacted, usually due to insufficient vibration, segregation, or leaking formwork.
The engineer's biggest enemy. When concrete cover is too thin: water gets in, rebar rusts, the building deteriorates.
Written as fc' or K — for example K250, K300, K500. The higher it is, the stronger against compression.
Concrete delivered by truck mixer.
In Indonesia, K500 means a compressive strength of about 500 kg/cm² — equivalent to ±41 MPa (megapascal).
Also called Concrete Spacer or Concrete Cover Block. Its function is to maintain concrete cover.
A feature of the Multi product. The interlock keeps the rebar position more stable.
For example 20 mm, 25 mm, 40 mm — per the working drawings.
The Indonesian standard for structural concrete — equivalent to ACI 318 (America) and Eurocode 2 / EN 1992-1-1 (Europe). Cover tolerances: ACI 117 · Japan: JIS/AIJ · Korea: KDS · China: GB 50010.
In engineering forums, use the technical terms Concrete Cover Block, Concrete Spacer, or Concrete Decking. The product is locally known in Indonesia as tahu beton — that name is perfectly good for communicating with workers, foremen, and the local market, but when talking to civil engineering lecturers, structural consultants, or large contractors, use the technical terms.
Tell us the job type, structural element, cover requirement, and rebar size — the BDI team will help direct you to the right product choice.
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