When specifying concrete piles for construction, the first question is: prestressed or regular reinforced concrete (RC) pile? This guide explains the differences and selection criteria.
Technical differences
Regular RC pile
- Reinforced with deformed steel bars
- Cast in formwork
- Reaches full load capacity only when concrete fully cures
- Lower cost, but more brittle
Prestressed concrete pile
- Reinforced with high-tensile prestressing strands
- Strands tensioned BEFORE concrete pour → creates initial compression in the pile
- Carries load immediately upon release of tensioning
- Greater resistance to cracking during transport and driving
Why prestressed piles are superior
Advantages:
- Higher load capacity — 30-50% more at the same size
- Less cracking during driving — reduced waste
- Longer service life — initial compression prevents load-induced cracking
- TIS-2594-2556 standard — strict quality requirements ensure consistency
Sizes manufactured (prestressed)
Per TIS-2594-2556:
| Size | Application |
|---|---|
| 0.18 × 0.18 m | 1-2 storey residential |
| 0.22 × 0.22 m | 2-3 storey residential |
| 0.26 × 0.26 m | 3-5 storey buildings |
| 0.30 × 0.30 m | 5-8 storey / warehouses |
| 0.35 × 0.35 m | 8+ storey / major structures |
Pricing factors
Prestressed pile pricing depends on:
- Size — larger piles use more concrete and prestressing strand
- Length — longer piles add complexity in production and transport
- Quantity — discounts start at 100+ piles
- Delivery distance — within 200 km of Pathum Thani: no transport surcharge
When regular piles are sufficient
Choose regular RC piles when:
- Ground bearing is adequate, no deep driving needed
- Small structure, modest loads
- Budget constrained, easy access for installation
When prestressed is required
Use prestressed piles when:
- Deep driving needed (soft soil layers)
- Government project (TOR typically references TIS-2594)
- Heavy / tall structure
- Quality certainty is critical
Request a quote
Siripong Cement manufactures prestressed concrete piles to TIS-2594-2556 in all standard sizes — Pathum Thani factory, deliveries throughout Central Thailand.
Contact us — response within 1 business day